Fibre bundle gathering device for a textile machine
By adjusting the step width of the suction hole and suction slit in the fiber bundling device of the textile machine, the problems of yarn quality and clogging were solved, and the stability of yarn quality and smooth operation of the device were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TOYOTA INDUSTRIES CORP
- Filing Date
- 2023-10-17
- Publication Date
- 2026-07-21
AI Technical Summary
In the fiber bundling device of a textile machine, the suction hole and suction slit are prone to clogging, which leads to a decrease in yarn quality. Existing technology has not been able to effectively solve the relationship between the step between the edge of the hole and the edge of the slit and the impact on yarn quality and clogging.
In the direction of fiber bundle movement, at the intersection of the suction hole and the suction slit, the step width between the edge of the hole and the edge of the slit on the upstream side of the intersection is greater than the step width on the downstream side of the intersection, and the step is eliminated on the downstream side. By adjusting the step width, the effects of clogging and yarn quality are suppressed.
It effectively suppresses clogging of the suction holes and suction slits, while maintaining yarn quality and avoiding yarn quality degradation caused by excessive step width.
Smart Images
Figure CN118374910B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a fiber bundle bundling device for textile machines. Background Technology
[0002] A fiber bundling device in a textile machine bundles a fiber bundle that has been drawn by a drafting device. The fiber bundling device includes a suction tube, a breathable apron, and a guide member. The suction tube is located downstream of the drafting device in the fiber bundle's direction of movement. The suction tube has suction holes that extend at an angle relative to a direction orthogonal to the extension direction of the suction tube. The breathable apron is wound around the suction tube. The breathable apron conveys the fiber bundle. The guide member is installed on the suction tube at a position corresponding to the winding position of the breathable apron. The guide member guides the movement of the breathable apron. The guide member has a suction slit that extends in a manner overlapping the suction holes.
[0003] In the fiber bundling device of such a textile machine, there exists a situation where fibers become hooked in the gap between the suction tube and the guide component at the overlapping portion of the suction orifice and the suction slit. As fibers further attach to the hooked fibers, the hooked fibers grow larger like a snowball. Moreover, if the enlarged fibers clog the suction orifice and the suction slit, blockage occurs. This blockage of the suction orifice and the suction slit leads to a decrease in yarn quality.
[0004] In Patent Document 1, a step is created between the edge of the suction hole (i.e., the hole edge) and the edge of the suction slit (i.e., the slit edge) by making the width of the suction hole different from the width of the suction slit. In this case, the gap between the suction tube and the guide member is smaller than the size of the step relative to the passage path of the fiber bundle, so the fiber is less likely to get caught in the gap. As a result, clogging of the suction hole and the suction slit is suppressed.
[0005] It is known that the region downstream of the fiber bundle's movement direction at the suction hole and suction slit is prone to affecting yarn quality. Therefore, if a step is provided between the hole edge and the slit edge in this downstream region, there is a concern about reduced yarn quality. Therefore, by making the hole width of the suction hole the same as the slit width in the downstream region of the fiber bundle's movement direction at the suction hole and suction slit, a step between the hole edge and the slit edge is avoided.
[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-125394
[0007] It can be assumed that the wider the step between the orifice edge and the slit edge, the more effectively the clogging of the suction orifice and suction slit is suppressed. However, it has been determined that if the step width is too large, even if no step is generated between the orifice edge and the slit edge in the downstream area of the suction orifice and suction slit, the yarn quality is reduced.
[0008] Furthermore, Patent Document 1 states that no steps may be provided in the direction of fiber bundle movement up to the downstream side of the center of the suction hole and the suction slit. However, no indication is given regarding the relationship between the extent of the steps and the quality of the yarn. Summary of the Invention
[0009] A fiber bundle bundling device for a textile machine for solving the aforementioned problems includes: an attraction tube disposed downstream of a drafting device in the fiber bundle movement direction; and a guide member installed on the attraction tube corresponding to the winding position of a breathable apron wound on the attraction tube, guiding the movement of the breathable apron. The attraction tube has an attraction hole extending at an angle relative to a direction orthogonal to the extension direction of the attraction tube. The guide member has an attraction slit extending overlapping the attraction hole. The main feature of the fiber bundle bundling device for the textile machine is that, taking the intersection point of a straight line passing through the upstream end of the attraction hole and orthogonal to the extension direction of the attraction tube with the edge of the attraction hole (i.e., the hole edge) as a boundary, the width of the step between the hole edge and the edge of the attraction slit (i.e., the slit edge) upstream of the intersection point in the fiber bundle movement direction is greater than the width of the step between the hole edge and the slit edge downstream of the intersection point.
[0010] In the direction of fiber bundle movement, upstream of the intersection point, the fiber bundle passes away from the edge of the hole and the edge of the slit. Conversely, downstream of the intersection point, the fiber bundle is bundled as it moves along the edge of the hole and the edge of the slit. Therefore, the region downstream of the intersection point in the direction of fiber bundle movement is more prone to fiber bundle bundle bundling and thus yarn quality compared to the region upstream of the intersection point. Furthermore, it is known that blockage of the suction hole and suction slit is more likely to occur in the region upstream of the intersection point in the direction of fiber bundle movement.
[0011] According to the above structure, the width of the step between the aperture edge and the slit edge upstream of the intersection point in the fiber bundle movement direction is greater than the width of the step between the aperture edge and the slit edge downstream of the intersection point. Thus, in the region where clogging is likely to occur but is less likely to affect yarn quality—that is, upstream of the intersection point—the step width is increased compared to the downstream side, thereby suppressing clogging. On the other hand, in the region where yarn quality is likely to be affected—that is, downstream of the intersection point—the step width is decreased compared to the upstream side, thereby suppressing the degradation of yarn quality. Therefore, the degradation of yarn quality can be suppressed, and clogging of the suction aperture and suction slit can be suppressed.
[0012] Alternatively, in the fiber bundle bundling device of the above-mentioned textile machine, the width of the step between the edge of the hole and the edge of the slit on the downstream side of the intersection point in the direction of movement of the fiber bundle is zero.
[0013] According to the above structure, compared with the case where a step is also provided between the hole edge and the slit edge on the downstream side of the intersection point in the direction of fiber bundle movement, the reduction in yarn quality can be suppressed more effectively.
[0014] Alternatively, in the fiber bundle bundling device of the above-mentioned textile machine, the hole edge portion includes a first hole edge portion intersecting the above-mentioned straight line and a second hole edge portion located on the opposite side of the first hole edge portion. The width of the step between the first hole edge portion and the slit edge portion upstream of the intersection point in the fiber bundle movement direction is smaller than the width of the step between the second hole edge portion and the slit edge portion upstream of the intersection point in the fiber bundle movement direction.
[0015] In the direction of fiber bundle movement, upstream of the intersection point, the fiber bundle passes near the first hole edge compared to the second hole edge. Therefore, the step between the first hole edge and the slit edge is more likely to affect yarn quality than the step between the second hole edge and the slit edge. Therefore, by making the width of the step between the first hole edge and the slit edge smaller than the width of the step between the second hole edge and the slit edge, the reduction in yarn quality can be more effectively suppressed.
[0016] According to the present invention, it is possible to suppress the deterioration of yarn quality and suppress the clogging of the suction holes and suction slits. Attached Figure Description
[0017] Figure 1 This is a partial sectional view of a textile machine.
[0018] Figure 2 This is a perspective view showing the suction tube and guide component in the first embodiment.
[0019] Figure 3This is a partial front view showing the suction tube in the first embodiment.
[0020] Figure 4 This is a front view showing the guide component in the first embodiment.
[0021] Figure 5 This is a partial front view showing the suction tube and guide component in the first embodiment.
[0022] Figure 6 This indicates the suction tube and guide member in the first embodiment along... Figure 5 A sectional view along line 6-6.
[0023] Figure 7 This indicates the suction tube and guide member in the first embodiment along... Figure 5 A sectional view along line 7-7.
[0024] Figure 8 This is a partial front view showing the suction tube and guide component in the second embodiment.
[0025] Figure 9 This indicates the suction tube and guide member in the second embodiment along... Figure 8 A sectional view along line 9-9.
[0026] Figure 10 This is a front view showing the suction tube and guide component in the third embodiment.
[0027] Figure 11 This is a partial front view showing the suction tube and guide component in the modified example.
[0028] Figure 12 This indicates the suction tube and guide component along the modified example. Figure 11 A cross-sectional view along line AA.
[0029] Explanation of reference numerals in the attached figures
[0030] 10... Fiber bundle gathering device; 13... Suction tube; 15... Breathable rubber ring; 16... Guiding component; 35... Suction hole; 50... Hole edge; 51... First hole edge; 52... Second hole edge; 64... Suction slit; 70... Slit edge; 80... Step; 100... Textile machine; 110... Drafting device; 350... Upstream end point; F... Fiber bundle; L... Straight line; Q... Intersection point; X... Direction of fiber bundle movement. Detailed Implementation
[0031] [First Implementation]
[0032] The following is based on Figures 1 to 7The first embodiment, which embodies the fiber bundle bundling device of a textile machine, will be described. Hereinafter, the "fiber bundle bundling device of a textile machine" will be simply referred to as the "fiber bundle bundling device".
[0033] like Figure 1 As shown, the textile machine 100 includes a drafting device 110 and a fiber bundle bundling device 10. The drafting device 110 drafts the fiber bundle F. The fiber bundle bundling device 10 is disposed downstream of the drafting device 110 in the moving direction X of the fiber bundle F. The fiber bundle bundling device 10 pre-bundles the fiber bundle F before twisting it.
[0034] The drafting apparatus 110 includes a final delivery roller pair 111. The final delivery roller pair 111 is the downstream roller pair among the roller pairs in the fiber bundle F's movement direction X. The final delivery roller pair 111 has a front lower roller 112 and a front upper roller 113. The front upper roller 113 is supported by a support member 114.
[0035] <Fiber Bundle Bundling Device>
[0036] The fiber bundle gathering device 10 includes a rotating shaft 11, a pair of clamping rollers 12, a suction tube 13, a guide section 14, a breathable rubber ring 15, and a guide component 16.
[0037] The rotating shaft 11 is configured to extend parallel to the front lower roller 112. A gear section (not shown) is provided on the rotating shaft 11. An intermediate gear 17 meshes with the gear section 112a provided on the front lower roller 112. The torque of the front lower roller 112 is transmitted to the rotating shaft 11 via the intermediate gear 17, thereby causing the rotating shaft 11 to rotate.
[0038] The clamping roller pair 12 has a lower clamping roller 21 and an upper clamping roller 22. The lower clamping roller 21 is disposed on the rotating shaft 11. If the rotating shaft 11 rotates, the lower clamping roller 21 rotates integrally with the rotating shaft 11. A venting ring 15 is wound on the lower clamping roller 21. The upper clamping roller 22 is supported by a rocker arm (not shown) via a support member 114. The lower clamping roller 21 and the upper clamping roller 22 rotate at approximately the same speed as the final delivery roller pair 111.
[0039] The fiber bundle F, fed from the final delivery roller pair 111 of the drawing device 110, passes together with the breathable apron 15 between the lower clamping roller 21 and the upper clamping roller 22. The upper clamping roller 22 is pressed by the lower clamping roller 21 via the breathable apron 15. Thus, the fiber bundle F and the breathable apron 15 are clamped by the clamping roller pair 12. The position where the breathable apron 15 and the fiber bundle F are clamped by the clamping roller pair 12 is called the clamping position P.
[0040] <Suction tube>
[0041] The suction tube 13 is cylindrical. The suction tube 13 is formed, for example, by extrusion molding of aluminum. The suction tube 13 is positioned downstream of the final delivery roller pair 111 and upstream of the clamping position P in the direction of movement X of the fiber bundle F. The direction of extension of the suction tube 13 is aligned with the axial direction of the rotation shaft 11. The suction tube 13 is connected to a suction source (not shown).
[0042] like Figure 2 As shown, the suction tube 13 has a first tube component 31, a second tube component 32, and a third tube component 33. The first tube component 31 is bent in a bulging outward manner. The second tube component 32 starts from and continues to the upstream end of the first tube component 31 in the movement direction X of the fiber bundle F. The second tube component 32 is bent in a concave inward manner. The third tube component 33 starts from and continues to the downstream end of the first tube component 31 in the movement direction X of the fiber bundle F. The third tube component 33 is bent in a concave inward manner.
[0043] The suction tube 13 has a plurality of suction portions 34. The plurality of suction portions 34 are arranged at intervals in the extending direction of the suction tube 13. In this embodiment, each suction portion 34 is composed of a pair of suction holes 35. Each suction hole 35 passes through the first tube component 31. The pair of suction holes 35 are arranged at intervals in the extending direction of the suction tube 13. Hereinafter, when it is necessary to distinguish between a pair of suction holes 35, one suction hole 35 will be referred to as the first suction hole 35a, and the other suction hole 35 will be referred to as the second suction hole 35b.
[0044] like Figure 3 As shown, the suction hole 35 extends at an angle relative to the direction orthogonal to the extension direction of the suction tube 13. Specifically, the first suction hole 35a extends at an angle relative to the direction orthogonal to the extension direction of the suction tube 13. Figure 3 It extends at an angle to the left side of the paper. The second suction hole 35b extends in a direction orthogonal to the extending direction of the suction tube 13. Figure 3 The paper extends in a tilted manner to the right. A pair of suction holes 35 are configured to approach each other as the fiber bundle F moves from the upstream side to the downstream side in the direction X of movement.
[0045] The edge of the suction hole 35, namely the hole edge 50, has a first hole edge 51, a second hole edge 52, a third hole edge 53, and a fourth hole edge 54.
[0046] The first hole edge 51 and the second hole edge 52 extend parallel to each other. The first hole edge 51 and the second hole edge 52 extend in a straight line along the extending direction of the suction hole 35. The second hole edge 52 is located on the opposite side of the first hole edge 51. The interval between the first hole edge 51 and the second hole edge 52 is defined as the hole width W35 of the suction hole 35. The hole width W35 of the suction hole 35 is constant in the extending direction of the suction hole 35.
[0047] A pair of suction holes 35 are configured such that the first hole edge 51 is located on the outer side and the second hole edge 52 is located on the inner side. Therefore, the distance between the pair of first hole edges 51 is greater than the distance between the pair of second hole edges 52.
[0048] The third aperture portion 53 connects the upstream end of the first aperture portion 51 and the upstream end of the second aperture portion 52 in the direction of movement X of the fiber bundle F. The third aperture portion 53 extends in an arc shape. The fourth aperture portion 54 connects the downstream end of the first aperture portion 51 and the downstream end of the second aperture portion 52 in the direction of movement X of the fiber bundle F. The fourth aperture portion 54 extends in a straight line.
[0049] The upstream point in the third aperture 53 located in the moving direction X of the fiber bundle F is designated as the upstream end point 350 of the suction hole 35. A straight line passing through the upstream end point 350 of the suction hole 35 and extending in a direction orthogonal to the extending direction of the suction tube 13 is designated as the straight line L. The straight line L intersects the first aperture 51. The intersection point between the straight line L and the first aperture 51 is designated as the intersection point Q.
[0050] like Figure 1 As shown, the breathable apron 15 is a ring-shaped strip. The breathable apron 15 is formed from, for example, a fabric with suitable breathability. The breathable apron 15 is wound around the suction tube 13, the guide portion 14, and the lower clamping roller 21. The breathable apron 15 is wound around the suction tube 13 corresponding to the position where the suction portion 34 is provided. Therefore, a plurality of breathable aprons 15 are wound around the suction tube 13. The plurality of breathable aprons 15 are arranged at intervals in the extending direction of the suction tube 13. The breathable aprons 15 transport the fiber bundle F by rotating in tandem with the rotation of the lower clamping roller 21.
[0051] <Guide Component>
[0052] like Figure 2 As shown, multiple guide members 16 are mounted relative to the suction tube 13. The multiple guide members 16 are arranged at intervals along the extending direction of the suction tube 13. Furthermore, Figure 2 In the figure, one guide member 16 is shown in the state of being installed in the suction tube 13 and one guide member 16 is shown in the state of not being installed in the suction tube 13.
[0053] A guide member 16 is installed on the suction tube 13 at the position where the suction part 34 is provided. As described above, a breathable rubber ring 15 is also wound around the suction tube 13 at the position where the suction part 34 is provided. Therefore, the guide member 16 is installed on the suction tube 13 at the winding position where the breathable rubber ring 15 is wound around the suction tube 13. The guide member 16 is located between the suction tube 13 and the breathable rubber ring 15. The guide member 16 guides the movement of the breathable rubber ring 15.
[0054] The guide member 16 has a guide portion 60, a first buckling portion 61, and a second buckling portion 62. The guide member 16 is formed by buckling a thin sheet of metal, for example.
[0055] The guide portion 60 is bent in a manner that follows the shape of the first tube component 31 of the suction tube 13. The guide portion 60 has a first surface 60a and a second surface 60b. The first surface 60a faces the outer peripheral surface 13a of the suction tube 13. A gap S (see reference) is provided between the first surface 60a of the guide portion 60 and the outer peripheral surface 13a of the suction tube 13. Figure 6 and Figure 7 The second surface 60b is the surface opposite to the first surface 60a. The breathable rubber ring 15 slides relative to the second surface 60b of the guide portion 60.
[0056] The first bend 61 begins at and continues from the upstream end of the guide portion 60 in the direction of movement X of the fiber bundle F. The first bend 61 bends in a manner that follows the shape of the connection portion between the first tube component 31 and the second tube component 32 of the suction tube 13. The second bend 62 begins at and continues from the downstream end of the guide portion 60 in the direction of movement X of the fiber bundle F. The second bend 62 bends in a manner that follows the shape of the connection portion between the first tube component 31 and the third tube component 33 of the suction tube 13.
[0057] The guide member 16 has a pair of suction slits 64. Each suction slit 64 passes through the guide portion 60. The pair of suction slits 64 are spaced apart in the extending direction of the suction tube 13. When it is necessary to distinguish the pair of suction slits 64, one suction slit 64 is designated as the first suction slit 64a, and the other suction slit 64 is designated as the second suction slit 64b.
[0058] like Figure 4 and Figure 5 As shown, the suction slit 64 extends at an angle relative to the direction orthogonal to the extension direction of the suction tube 13. Specifically, the first suction slit 64a extends at an angle relative to the direction orthogonal to the extension direction of the suction tube 13. Figure 4 or Figure 5The second suction slit 64b extends at an angle to the left of the paper surface. It extends in a direction orthogonal to the extending direction of the suction tube 13. Figure 4 or Figure 5 The paper extends in a tilted manner to the right. A pair of attraction slits 64 are configured to approach each other as they move from the upstream side to the downstream side in the direction X of the fiber bundle F.
[0059] The tilt angle of the first suction slit 64a relative to the direction orthogonal to the extension direction of the suction tube 13 is the same as the tilt angle of the first suction hole 35a relative to the direction orthogonal to the extension direction of the suction tube 13. The tilt angle of the second suction slit 64b relative to the direction orthogonal to the extension direction of the suction tube 13 is the same as the tilt angle of the second suction hole 35b relative to the direction orthogonal to the extension direction of the suction tube 13.
[0060] The edge of the slit 64, namely the slit edge 70, has a first slit edge 71, a second slit edge 72, a third slit edge 73, and a fourth slit edge 74.
[0061] The first slit edge 71 and the second slit edge 72 extend in the extending direction of the attraction slit 64. The second slit edge 72 is located on the opposite side of the first slit edge 71. The pair of attraction slits 64 are configured such that the first slit edge 71 is located on the outer side and the second slit edge 72 is located on the inner side.
[0062] The first slit edge 71 has an upstream portion 71a, a downstream portion 71b, and a connecting portion 71c. The upstream portion 71a, downstream portion 71b, and connecting portion 71c extend in a straight line. The upstream portion 71a extends along the extending direction of the attraction slit 64. The downstream portion 71b is located downstream of the upstream portion 71a in the moving direction X of the fiber bundle F. The downstream portion 71b extends parallel to the upstream portion 71a. The downstream portion 71b extends along the extending direction of the attraction slit 64. The connecting portion 71c connects the downstream end of the upstream portion 71a to the upstream end of the downstream portion 71b. The connecting portion 71c extends at an angle relative to the upstream portion 71a and the downstream portion 71b.
[0063] The second slit edge 72 has an upstream portion 72a, a downstream portion 72b, and a connecting portion 72c. The upstream portion 72a, downstream portion 72b, and connecting portion 72c extend in a straight line. The upstream portion 72a extends along the extending direction of the attraction slit 64. The downstream portion 72b is located downstream of the upstream portion 72a in the moving direction X of the fiber bundle F. The downstream portion 72b extends parallel to the upstream portion 72a. The downstream portion 72b extends along the extending direction of the attraction slit 64. The connecting portion 72c connects the downstream end of the upstream portion 72a to the upstream end of the downstream portion 72b. The connecting portion 72c extends at an angle relative to the upstream portion 72a and the downstream portion 72b.
[0064] The upstream portion 71a of the first slit edge 71 faces the upstream portion 72a of the second slit edge 72. The upstream portions 71a and 72a of the first slit edge 71 and the second slit edge 72 extend parallel to each other. The interval between the upstream portions 71a and 72a of the first slit edge 71 and the second slit edge 72 is defined as the first slit width W641 of the suction slit 64. The first slit width W641 is different from the width W35 of the suction hole 35. In this embodiment, the first slit width W641 is greater than the width W35 of the suction hole 35.
[0065] The downstream portion 71b of the first slit edge 71 faces the downstream portion 72b of the second slit edge 72. The downstream portions 71b of the first slit edge 71 and 72b of the second slit edge 72 extend parallel to each other. The interval between the downstream portions 71b of the first slit edge 71 and 72b of the second slit edge 72 is defined as the second slit width W642 of the suction slit 64. The second slit width W642 is smaller than the first slit width W641. In this embodiment, the second slit width W642 is the same as the hole width W35 of the suction hole 35. Furthermore, "the second slit width W642 is the same as the hole width W35" also includes the case where the second slit width W642 differs from the hole width W35 within the range of manufacturing tolerances of the suction hole 35 and the suction slit 64.
[0066] The connecting portion 71c of the first slit edge 71 faces the connecting portion 72c of the second slit edge 72. The gap between the connecting portion 71c of the first slit edge 71 and the connecting portion 72c of the second slit edge 72 gradually narrows as it moves from the upstream side to the downstream side of the fiber bundle F's moving direction X. The gap between the connecting portion 71c of the first slit edge 71 and the connecting portion 72c of the second slit edge 72 is larger than the aperture width W35 of the suction hole 35.
[0067] The third slit edge 73 connects the upstream end of the first slit edge 71 and the upstream end of the second slit edge 72 in the moving direction X of the fiber bundle F. The third slit edge 73 extends in an arc shape. In this embodiment, the radius of the imaginary circle constituting the third slit edge 73 is larger than the radius of the imaginary circle constituting the third hole edge 53. The fourth slit edge 74 connects the downstream end of the first slit edge 71 and the downstream end of the second slit edge 72 in the moving direction X of the fiber bundle F. The fourth slit edge 74 extends in a straight line.
[0068] <The Relationship Between Suction Hole and Suction Slit>
[0069] like Figure 5As shown, a pair of suction slits 64 extend along a pair of suction holes 35. Specifically, a first suction slit 64a extends along a first suction hole 35a. A second suction slit 64b extends along a second suction hole 35b. The suction slits 64 overlap with the suction holes 35.
[0070] The connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c overlaps with the intersection point Q. The upstream portion 71a and connecting portion 71c of the first slit edge 71, the upstream portion 72a and connecting portion 72c of the second slit edge 72, and the third slit edge 73 are located upstream of the intersection point Q in the direction of movement X of the fiber bundle F. The downstream portion 71b of the first slit edge 71, the downstream portion 72b of the second slit edge 72, and the fourth slit edge 74 are located downstream of the intersection point Q in the direction of movement X of the fiber bundle F.
[0071] In the direction of fiber bundle F's movement X, upstream of the intersection point Q, the shape of the aperture edge 50 differs from the shape of the slit edge 70. As described above, the width W641 of the first slit of the attraction slit 64 is larger than the width W35 of the attraction hole 35. Therefore, the upstream portion 71a and the connecting portion 71c of the first slit edge 71 are located outside the first aperture edge 51. The upstream portion 72a and the connecting portion 72c of the second slit edge 72 are located outside the second aperture edge 52. Furthermore, the radius of the imaginary circle constituting the third slit edge 73 is larger than the radius of the imaginary circle constituting the third aperture edge 53. Therefore, the third slit edge 73 is located outside the third aperture edge 53. In other words, in the direction of fiber bundle F's movement X, upstream of the intersection point Q, the slit edge 70 is located one circle larger than the aperture edge 50.
[0072] like Figure 5 and Figure 6 As shown, a step 80 is formed upstream of the intersection point Q in the moving direction X of the fiber bundle F, between the aperture 50 and the slit edge 70. In this embodiment, the step 80 is formed by the portion of the outer peripheral surface 13a of the suction tube 13 exposed through the suction slit 64. Therefore, upstream of the intersection point Q in the moving direction X of the fiber bundle F, the gap S is separated from the aperture 50 by the size of the step 80.
[0073] The step 80 between the first hole edge 51 and the upstream portion 71a of the first slit edge 71 is designated as the first step portion 80a. The step 80 between the second hole edge 52 and the upstream portion 72a of the second slit edge 72 is designated as the second step portion 80b. The widths W80a of the first step portion 80a and W80b of the second step portion 80b in a direction orthogonal to the extending directions of the suction hole 35 and the suction slit 64 are the widths of the step 80 between the hole edge 50 and the slit edge 70 at the upstream side of the intersection point Q in the moving direction X of the fiber bundle F, respectively. In this embodiment, the widths W80a of the first step portion 80a and W80b of the second step portion 80b are the same.
[0074] On the other hand, in this embodiment, the shape of the aperture 50 is the same as the shape of the slit edge 70 downstream of the intersection point Q in the moving direction X of the fiber bundle F. As described above, the width W642 of the second slit of the suction slit 64 is the same as the width W35 of the suction hole 35.
[0075] like Figure 7 As shown, the downstream portions 71b of the first aperture 51 and the first slit 71 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. The downstream portions 72b of the second aperture 52 and the second slit 72 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. Therefore, in the direction of fiber bundle F movement X, downstream of the intersection point Q, the width of the step between the aperture 50 and the slit 70 is zero. That is, no step is provided between the aperture 50 and the slit 70.
[0076] With the intersection point Q as the boundary, in the direction of fiber bundle F movement X, the widths W80a and W80b of the step 80 between the hole edge 50 and the slit edge 70 upstream of the intersection point Q are greater than the width of the step between the hole edge 50 and the slit edge 70 downstream of the intersection point Q.
[0077] <Operation of the fiber bundle bundling device>
[0078] After being delivered from the final delivery roller pair 111, the fiber bundles F are conveyed by the breathable apron 15. In this embodiment, each breathable apron 15 conveys two fiber bundles F. At this time, the fiber bundles F receive suction from the suction source connected to the suction tube 13 via the suction hole 35 of the suction tube 13, the suction slit 64 of the guide member 16, and the breathable apron 15. As a result, the fiber bundles F are pressed against the surface of the breathable apron 15. Furthermore, the fiber bundles F are bundled together along the suction hole 35 and the suction slit 64.
[0079] In detail, the fiber bundle F is positioned in the extending direction of the suction tube 13 such that it passes through the upstream end point 350 of the suction hole 35. In the direction of movement X of the fiber bundle F, upstream of the intersection point Q, the fiber bundle F moves along a straight line L. In other words, in the direction of movement X of the fiber bundle F, upstream of the intersection point Q, the fiber bundle F passes between the first hole edge 51 and the first slit edge 71 and the second hole edge 52 and the second slit edge 72. More specifically, compared to the second hole edge 52 and the second slit edge 72, the fiber bundle F passes near the first hole edge 51 and the first slit edge 71. The fiber bundle F is bundled by moving downstream of the intersection point Q along the first hole edge 51 and the first slit edge 71. Therefore, the first hole edge 51 and the first slit edge 71 are guiding edges that guide the bundle of the fiber bundle F. By bundling the fiber bundles F together in this way, the generation of fluff and lint can be suppressed.
[0080] Furthermore, the fiber bundle F is twisted after passing through the clamping position P of the clamping roller pair 12. In this embodiment, the two fiber bundles F are twisted into a single yarn.
[0081] [Effect of the first embodiment]
[0082] In the direction of fiber bundle F's movement X, upstream of the intersection point Q, fiber bundle F passes away from the aperture edge 50 and the slit edge 70. Conversely, downstream of the intersection point Q, fiber bundle F is bundled together as it moves along the aperture edge 50 and the slit edge 70. Therefore, the region downstream of the intersection point Q in the direction of fiber bundle F's movement X is more prone to affecting the bundle formation of fiber bundle F and thus the yarn quality compared to the region upstream of the intersection point Q. Furthermore, it is known that blockage of the suction aperture 35 and the suction slit 64 is easily generated in the region upstream of the intersection point Q in the direction of fiber bundle F's movement X.
[0083] In this embodiment, the widths W80a and W80b of the step 80 between the hole edge 50 and the slit edge 70 upstream of the intersection point Q in the fiber bundle F's movement direction X are greater than the width of the step between the hole edge 50 and the slit edge 70 downstream of the intersection point Q. Thus, in the area where clogging is likely to occur but is less likely to affect yarn quality—that is, upstream of the intersection point Q—clogging can be suppressed by increasing the widths W80a and W80b of the step 80 compared to the downstream side. Specifically, in the fiber bundle F's movement direction X, upstream of the intersection point Q, compared to the downstream side, the gap S between the suction tube 13 and the guide member 16 is farther from the hole edge 50, making it less likely for fibers to snag on the gap S. On the other hand, in the area where yarn quality is likely to be affected—that is, downstream of the intersection point Q—the width of the step is smaller compared to the upstream side, thereby suppressing the reduction in yarn quality. This can suppress the deterioration of yarn quality and prevent the clogging of the suction hole 35 and the suction slit 64.
[0084] [Effects of the first embodiment]
[0085] The effects of this implementation method will be explained.
[0086] (1-1) The suction tube 13 has a suction hole 35, which extends at an angle relative to a direction orthogonal to the extending direction of the suction tube 13. The guide member 16 has a suction slit 64, which extends in a manner overlapping with the suction hole 35. Alternatively, the intersection point Q between the straight line L passing through the upstream end point 350 of the suction hole 35 and orthogonal to the extending direction of the suction tube 13 and the edge portion 50 of the suction hole 35 can be used as a boundary. In the moving direction X of the fiber bundle F, the widths W80a and W80b of the step 80 between the edge portion 50 of the hole and the slit edge 70 upstream of the intersection point Q are greater than the width of the step between the edge portion 50 of the hole and the slit edge 70 downstream of the intersection point Q.
[0087] Thus, in the region where clogging of the suction hole 35 and suction slit 64 is likely to occur but is less likely to affect yarn quality—that is, upstream of the intersection point Q—the widths W80a and W80b of the step 80 are increased compared to the downstream side, thereby suppressing clogging of the suction hole 35 and suction slit 64. On the other hand, in the region where yarn quality is likely to be affected—that is, downstream of the intersection point Q—the width of the step is decreased compared to the upstream side, thereby suppressing a decrease in yarn quality. Therefore, a decrease in yarn quality and clogging of the suction hole 35 and suction slit 64 can be suppressed.
[0088] (1-2) In the direction of fiber bundle F's movement X, downstream of the intersection point Q, the width W35 of the suction hole 35 is the same as the width W642 of the second slit of the suction slit 64. Therefore, in the direction of fiber bundle F's movement X, downstream of the intersection point Q, the width of the step between the hole edge 50 and the slit edge 70 is zero. That is, in the direction of fiber bundle F's movement X, downstream of the intersection point Q, there is no step between the hole edge 50 and the slit edge 70. Therefore, compared to the case where a step between the hole edge 50 and the slit edge 70 is also provided in the direction of fiber bundle F's movement X, downstream of the intersection point Q, the reduction in yarn quality can be more effectively suppressed.
[0089] [Second Implementation]
[0090] The following is based on Figure 8 and Figure 9 A second embodiment, which embodies the fiber bundle gathering device of a textile machine, will be described. In the second embodiment, only the shapes of the suction hole 35 and the suction slit 64 differ from those of the first embodiment. Therefore, descriptions of structures identical to those in the first embodiment are omitted.
[0091] like Figure 8 As shown, the suction slit 64 of the second embodiment has the shape of the suction hole 35 of the first embodiment. The first slit edge 71 and the second slit edge 72 extend parallel to each other. The first slit edge 71 and the second slit edge 72 extend in a straight line along the extending direction of the suction slit 64. The second slit edge 72 is located on the opposite side of the first slit edge 71. The interval between the first slit edge 71 and the second slit edge 72 is defined as the slit width W64 of the suction slit 64. The slit width W64 of the suction slit 64 is constant in the extending direction of the suction slit 64. The third slit edge 73 connects the upstream end of the first slit edge 71 and the upstream end of the second slit edge 72 in the moving direction X of the fiber bundle F. The third slit edge 73 extends in an arc shape.
[0092] The suction hole 35 of the second embodiment forms the shape of the suction slit 64 of the first embodiment.
[0093] The first aperture edge portion 51 has an upstream portion 51a, a downstream portion 51b, and a connecting portion 51c. The upstream portion 51a, downstream portion 51b, and connecting portion 51c extend in a straight line. The upstream portion 51a extends along the extending direction of the suction aperture 35. The downstream portion 51b is located downstream of the upstream portion 51a in the moving direction X of the fiber bundle F. The downstream portion 51b extends parallel to the upstream portion 51a. The downstream portion 51b extends along the extending direction of the suction aperture 35. The connecting portion 51c connects the downstream end of the upstream portion 51a to the upstream end of the downstream portion 51b. The connecting portion 51c extends at an angle relative to the upstream portion 51a and the downstream portion 51b.
[0094] The second aperture edge portion 52 has an upstream portion 52a, a downstream portion 52b, and a connecting portion 52c. The upstream portion 52a, downstream portion 52b, and connecting portion 52c extend in a straight line. The upstream portion 52a extends along the extending direction of the suction aperture 35. The downstream portion 52b is located downstream of the upstream portion 52a in the moving direction X of the fiber bundle F. The downstream portion 52b extends parallel to the upstream portion 52a. The downstream portion 52b extends along the extending direction of the suction aperture 35. The connecting portion 52c connects the downstream end of the upstream portion 52a to the upstream end of the downstream portion 52b. The connecting portion 52c extends at an angle relative to the upstream portion 52a and the downstream portion 52b.
[0095] The upstream portion 51a of the first hole edge 51 faces the upstream portion 52a of the second hole edge 52. The upstream portions 51a and 52a of the first hole edge 51 and the second hole edge 52 extend parallel to each other. The interval between the upstream portions 51a and 52a of the first hole edge 51 and the second hole edge 52 is defined as the first hole width W351 of the suction hole 35. The first hole width W351 is different from the slit width W64 of the suction slit 64. In this embodiment, the first hole width W351 is greater than the slit width W64 of the suction slit 64.
[0096] The downstream portion 51b of the first hole edge 51 faces the downstream portion 52b of the second hole edge 52. The downstream portions 51b of the first hole edge 51 and 52b of the second hole edge 52 extend parallel to each other. The interval between the downstream portions 51b of the first hole edge 51 and 52b of the second hole edge 52 is set as the second hole width W352 of the suction hole 35. The second hole width W352 is smaller than the first hole width W351. In this embodiment, the second hole width W352 is the same as the slit width W64 of the suction slit 64. In addition, "the second hole width W352 is the same as the slit width W64" also includes the case where the second hole width W352 is different from the slit width W64 within the manufacturing error range of the suction hole 35 and the suction slit 64.
[0097] The connecting portion 51c of the first aperture 51 faces the connecting portion 52c of the second aperture 52. The gap between the connecting portion 51c of the first aperture 51 and the connecting portion 52c of the second aperture 52 gradually narrows as it moves from the upstream side to the downstream side of the fiber bundle F's moving direction X. The gap between the connecting portion 51c of the first aperture 51 and the connecting portion 52c of the second aperture 52 is greater than the slit width W64 of the attraction slit 64.
[0098] The third aperture 53 connects the upstream end of the first aperture 51 in the moving direction X of the fiber bundle F to the upstream end of the second aperture 52. The third aperture 53 extends in an arc shape. In this embodiment, the radius of the imaginary circle constituting the third aperture 53 is larger than the radius of the imaginary circle constituting the third slit edge 73.
[0099] The upstream point in the fiber bundle F moving in the direction X of the third hole edge 53 is designated as the upstream end point 350 of the suction hole 35. A straight line extending through the upstream end point 350 of the suction hole 35 and orthogonal to the extending direction of the suction tube 13 is designated as the straight line L. The straight line L intersects the first hole edge 51. Specifically, the straight line L intersects the connecting portion between the downstream portion 51b and the connecting portion 51c of the first hole edge 51. The intersection point between the straight line L and the first hole edge 51 is designated as the intersection point Q.
[0100] <The Relationship Between Suction Hole and Suction Slit>
[0101] The first slit edge 71 overlaps with the intersection point Q. The first slit edge 71 and the second slit edge 72 each have a portion located upstream of the intersection point Q and a portion located downstream of the intersection point Q in the direction of movement X of the fiber bundle F, respectively. The third slit edge 73 is located upstream of the intersection point Q in the direction of movement X of the fiber bundle F.
[0102] On the upstream side of the intersection point Q in the direction of fiber bundle F's movement X, the shape of the aperture 50 differs from that of the slit edge 70. As described above, the width W351 of the first aperture 35 is greater than the slit width W64 of the suction slit 64. Therefore, the upstream portion 51a and the connecting portion 51c of the first aperture 51 are located on the outer side of the first slit edge 71. The upstream portion 52a and the connecting portion 52c of the second aperture 52 are located on the outer side of the second slit edge 72. Furthermore, the radius of the imaginary circle constituting the third aperture 53 is greater than the radius of the imaginary circle constituting the third slit edge 73. Therefore, the third aperture 53 is located on the outer side of the third slit edge 73. In other words, on the upstream side of the intersection point Q in the direction of fiber bundle F's movement X, the aperture 50 is located on the outer side, which is larger than the slit edge 70.
[0103] like Figure 9 As shown, a step 80 is formed upstream of the intersection point Q in the moving direction X of the fiber bundle F, between the aperture 50 and the slit edge 70. In this embodiment, the step 80 is formed by the portion of the first surface 60a of the guide member 16 exposed through the suction hole 35. Therefore, upstream of the intersection point Q in the moving direction X of the fiber bundle F, the gap S is separated from the slit edge 70 by the size of the step 80.
[0104] In other words, in the first embodiment, a step 80 is formed on the upstream side of the intersection point Q in the movement direction X of the fiber bundle F, by means of the attraction slit 64 being one size larger than the attraction hole 35. In contrast, in this embodiment, a step 80 is formed on the upstream side of the intersection point Q in the movement direction X of the fiber bundle F, by means of the attraction hole 35 being one size larger than the attraction slit 64.
[0105] The step 80 between the upstream portion 51a of the first aperture 51 and the first slit edge 71 is designated as the first step portion 80a. The step 80 between the upstream portion 52a of the second aperture 52 and the second slit edge 72 is designated as the second step portion 80b. The widths W80a of the first step portion 80a and W80b of the second step portion 80b in the direction orthogonal to the extending directions of the suction hole 35 and the suction slit 64 are respectively the widths of the step 80 between the aperture 50 and the slit edge 70 upstream of the intersection point Q in the moving direction X of the fiber bundle F. In this embodiment, the widths W80a of the first step portion 80a and W80b of the second step portion 80b are the same.
[0106] Similar to the first embodiment, the shape of the aperture 50 is the same as the shape of the slit edge 70 downstream of the intersection point Q in the direction of fiber bundle F's movement X. As described above, the second aperture width W352 of the suction aperture 35 is the same as the slit width W64 of the suction slit 64. Therefore, the downstream portion 51b of the first aperture 51 and the first slit edge 71 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. The downstream portion 52b of the second aperture 52 and the second slit edge 72 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. Therefore, the width of the step between the aperture 50 and the slit edge 70 is zero downstream of the intersection point Q in the direction of fiber bundle F's movement X. That is, no step is provided between the aperture 50 and the slit edge 70.
[0107] In the second embodiment, the intersection point Q is also used as the boundary. In the direction of fiber bundle F movement X, the widths W80a and W80b of the step 80 between the hole edge 50 and the slit edge 70 upstream of the intersection point Q are greater than the width of the step between the hole edge 50 and the slit edge 70 downstream of the intersection point Q.
[0108] In the second embodiment, the same effects as those in the first embodiment (1-1) and (1-2) can be obtained.
[0109] [Third Implementation]
[0110] The following is based on Figure 10A third embodiment, which embodies the fiber bundle gathering device of a textile machine, will be described. Furthermore, in this third embodiment, only the number and shape of the suction holes 35 and the suction slits 64 differ from those in the first embodiment. Therefore, descriptions of structures identical to those in the first embodiment will be omitted.
[0111] like Figure 10 As shown, the suction section 34 of the suction tube 13 is composed of a suction hole 35. Furthermore, the guide member 16 has a suction slit 64. In this embodiment, the fiber bundle F is conveyed downstream while moving laterally along the extending direction of the suction tube 13 using a lateral movement device (not shown).
[0112] The suction hole 35 extends at an angle relative to the extending direction of the suction tube 13. In this embodiment, the suction hole 35 extends at an angle relative to the extending direction of the suction tube 13. Figure 10 It extends in a way that tilts to the right side of the paper.
[0113] The first aperture portion 51 has an upstream portion 51a, a downstream portion 51b, and a connecting portion 51c. The upstream portion 51a and the downstream portion 51b extend in a straight line. The downstream portion 51b is located downstream of the upstream portion 51a in the direction of movement X of the fiber bundle F. The inclination angle of the upstream portion 51a relative to the direction orthogonal to the extension direction of the suction tube 13 is greater than the inclination angle of the downstream portion 51b relative to the direction orthogonal to the extension direction of the suction tube 13. The connecting portion 51c smoothly connects the downstream end of the upstream portion 51a to the upstream end of the downstream portion 51b.
[0114] The second hole edge 52 is located on the opposite side to the first hole edge 51. The second hole edge 52 has an upstream portion 52a, a downstream portion 52b, and a connecting portion 52c.
[0115] The upstream portion 52a of the first aperture 51 has a first straight portion 521 and a second straight portion 522 extending in a straight line. The first straight portion 521 extends in a direction orthogonal to the extending direction of the suction tube 13. The first straight portion 521 is located on the upstream side of the first aperture 51 a step above the downstream portion 51b of the first aperture 51 in the extending direction of the suction tube 13. The second straight portion 522 extends downstream from the downstream end of the first straight portion 521 in the moving direction X of the fiber bundle F. The second straight portion 522 extends parallel to the upstream portion 51a of the first aperture 51.
[0116] The downstream portion 52b of the second aperture 52 extends in a straight line. The downstream portion 52b extends parallel to the downstream portion 51b of the first aperture 51. The inclination angle of the second straight portion 522 relative to the direction orthogonal to the extension direction of the suction tube 13 is greater than the inclination angle of the downstream portion 52b of the second aperture 52 relative to the movement direction X of the fiber bundle F. The connecting portion 52c of the second aperture 52 smoothly connects the downstream end of the second straight portion 522 to the upstream end of the downstream portion 52b. The connecting portion 52c of the second aperture 52 extends parallel to the connecting portion 51c of the first aperture 51.
[0117] The upstream portion 51a of the first aperture 51 faces the upstream portion 52a of the second aperture 52. The downstream portion 51b of the first aperture 51 faces the downstream portion 52b of the second aperture 52. The connecting portion 51c of the first aperture 51 faces the connecting portion 52c of the second aperture 52. In the direction of fiber bundle F movement X, upstream of the connecting portion between the first straight portion 521 and the second straight portion 522, the width of the suction hole 35 increases as it moves from the downstream side to the upstream side. In the direction of fiber bundle F movement X, downstream of the connecting portion between the first straight portion 521 and the second straight portion 522, the width of the suction hole 35 remains constant. In the direction of fiber bundle F's movement X, the hole width at the downstream side of the connection between the first straight section 521 and the second straight section 522 is smaller than the hole width at the upstream side of the connection between the first straight section 521 and the second straight section 522.
[0118] The third aperture 53 connects the upstream end of the first aperture 51 to the upstream end of the second aperture 52. The third aperture 53 extends linearly along the extending direction of the suction tube 13. Therefore, even if the position of the fiber bundle F changes along the extending direction of the suction tube 13 due to the lateral movement, the distance from the clamping position of the final delivery roller pair 111 to the suction hole 35 will remain constant.
[0119] In the third embodiment, the point in the third aperture 53 furthest from the first aperture 51 is designated as the upstream end point 350 of the suction hole 35. A straight line passing through the upstream end point 350 of the suction hole 35 and extending in a direction orthogonal to the extending direction of the suction tube 13 is designated as a straight line L. The straight line L extends along the first straight line portion 521. The range of lateral movement of the fiber bundle F is set to include the straight line L. The straight line L intersects the first aperture 51. The intersection point between the straight line L and the first aperture 51 is designated as the intersection point Q.
[0120] The first slit edge 71 has an upstream portion 71a, a downstream portion 71b, and a connecting portion 71c. The upstream portion 71a extends in a straight line. The upstream portion 71a extends parallel to the upstream portion 51a of the first aperture edge 51. In the direction of movement X of the fiber bundle F, the downstream portion 71b is located downstream of the upstream portion 71a. The downstream portion 71b extends parallel to the downstream portion 51b of the first aperture edge 51 and the connecting portion 51c. The connecting portion 71c connects the downstream end of the upstream portion 71a to the upstream end of the downstream portion 71b.
[0121] The second slit edge 72 has an upstream portion 72a, a downstream portion 72b, and a connecting portion 72c. The upstream portion 72a extends in a straight line. The upstream portion 72a extends parallel to the first straight portion 521 of the upstream portion 52a of the second aperture edge 52. In other words, the upstream portion 72a extends in a direction orthogonal to the extension direction of the suction tube 13. In the movement direction X of the fiber bundle F, the downstream portion 72b is located downstream of the upstream portion 72a. The downstream portion 72b extends parallel to the downstream portion 52b of the second aperture edge 52 and the connecting portion 52c. The connecting portion 72c connects the downstream end of the upstream portion 72a to the upstream end of the downstream portion 72b.
[0122] The upstream portion 71a of the first slit edge 71 faces the upstream portion 72a of the second slit edge 72. The downstream portion 71b of the first slit edge 71 faces the downstream portion 72b of the second slit edge 72. The downstream portion 71b of the first slit edge 71 extends parallel to the downstream portion 72b of the second slit edge 72. The connecting portion 71c of the first slit edge 71 faces the connecting portion 72c of the second slit edge 72.
[0123] In the direction of fiber bundle F's movement X, upstream of the connection between the downstream portion 71b and the connecting portion 71c of the first slit edge 71, the slit width of the attraction slit 64, i.e., the gap between the first slit edge 71 and the second slit edge 72, increases as it moves from the downstream side to the upstream side. The slit width of the attraction slit 64 in the direction of fiber bundle F's movement X, upstream of the connection between the downstream portion 71b and the connecting portion 71c, is greater than the width of the attraction hole 35.
[0124] In the fiber bundle F's moving direction X, the slit width of the attraction slit 64 is constant downstream of the connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c. The slit width downstream of the connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c in the fiber bundle F's moving direction X is smaller than the slit width upstream of the connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c. In this embodiment, the slit width of the attraction slit 64 downstream of the connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c in the fiber bundle F's moving direction X is the same as the aperture width of the attraction hole 35 downstream of the connection between the first straight portion 521 and the second straight portion 522 in the fiber bundle F's moving direction X. In addition, "the slit width is the same as the aperture width" also includes the case where the slit width is different from the aperture width within the manufacturing tolerance range of suction aperture 35 and suction slit 64.
[0125] <The Relationship Between Suction Hole and Suction Slit>
[0126] The connection between the downstream portion 71b of the first slit edge 71 and the connecting portion 71c overlaps with the intersection point Q. The upstream portion 71a and connecting portion 71c of the first slit edge 71, the upstream portion 72a and connecting portion 72c of the second slit edge 72, and the third slit edge 73 are located upstream of the intersection point Q in the direction of movement X of the fiber bundle F. The downstream portion 71b of the first slit edge 71 and the downstream portion 72b of the second slit edge 72 are located downstream of the intersection point Q in the direction of movement X of the fiber bundle F.
[0127] In the direction of fiber bundle F's movement X, upstream of the intersection point Q, the shape of the aperture edge 50 differs from that of the slit edge 70. In the direction of fiber bundle F's movement X, upstream of the intersection point Q, the slit width of the attraction slit 64 is greater than the width of the attraction hole 35. Therefore, the upstream portion 71a and connecting portion 71c of the first slit edge 71 are located further outward than the first aperture edge 51. The upstream portion 72a and connecting portion 72c of the second slit edge 72 are located further outward than the second aperture edge 52. Furthermore, the third slit edge 73 is located further outward than the third aperture edge 53. In other words, in the direction of fiber bundle F's movement X, upstream of the intersection point Q, the slit edge 70 is located a size larger than the aperture edge 50 on the outer side.
[0128] A step 80 is formed upstream of the intersection point Q in the moving direction X of the fiber bundle F, between the aperture 50 and the slit edge 70. In this embodiment, the step 80 is formed by the portion of the outer peripheral surface 13a of the suction tube 13 exposed through the suction slit 64. As a result, at the upstream of the intersection point Q in the moving direction X of the fiber bundle F, the gap S is separated from the aperture 50 by the size of the step 80.
[0129] The step 80 between the upstream portion 51a of the first aperture edge 51 and the upstream portion 71a of the first slit edge 71 is designated as the first step portion 80a. The step 80 between the first straight portion 521 of the upstream portion 52a of the second aperture edge 52 and the upstream portion 72a of the second slit edge 72 is designated as the second step portion 80b. The widths W80a and W80b of the first step portion 80a and the second step portion 80b are respectively the widths of the step 80 between the aperture edge 50 and the slit edge 70 at the upstream side of the intersection point Q in the moving direction X of the fiber bundle F. In this embodiment, the widths W80a and W80b of the first step portion 80a and the second step portion 80b are the same.
[0130] Similar to the first embodiment, at the downstream side of the intersection point Q in the moving direction X of the fiber bundle F, the shape of the hole edge 50 is the same as the shape of the slit edge 70. At the downstream side of the intersection point Q in the moving direction X of the fiber bundle F, the slit width of the attraction slit 64 is the same as the hole width of the attraction hole 35.
[0131] The downstream portions 71b of the first aperture 51 and the first slit 71 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. The downstream portions 72b of the second aperture 52 and the second slit 72 are arranged with a gap S in the direction where the first tube component 31 of the suction tube 13 overlaps with the guide portion 60 of the guide member 16. Therefore, in the direction of fiber bundle F movement X, downstream of the intersection point Q, the width of the step between the aperture 50 and the slit 70 is zero. That is, there is no step between the aperture 50 and the slit 70.
[0132] Thus, in the third embodiment, the intersection point Q is also used as the boundary, and the widths W80a and W80b of the step 80 between the hole edge 50 and the slit edge 70 on the moving direction X of the fiber bundle F are greater than the width of the step between the hole edge 50 and the slit edge 70 on the downstream side of the intersection point Q.
[0133] In the third embodiment, the same effects as those in the first embodiment (1-1) and (1-2) can be obtained.
[0134] [Example of Change]
[0135] Furthermore, the above-described embodiments can be modified as follows. The above-described embodiments and the following modifications can be combined with each other within the scope of technical non-inconsistency.
[0136] In the above embodiments, the width of the step between the aperture 50 and the slit edge 70 is zero on the downstream side of the intersection point Q in the movement direction X of the fiber bundle F, thus eliminating the need for a step. However, a step between the aperture 50 and the slit edge 70 can still be provided. However, the width of the step between the aperture 50 and the slit edge 70 on the downstream side of the intersection point Q in the movement direction X of the fiber bundle F is smaller than the widths W80a and W80b of the step 80 between the aperture 50 and the slit edge 70 on the upstream side of the intersection point Q in the movement direction X of the fiber bundle F.
[0137] In the above embodiments, the width W80a of the first step portion 80a is the same as the width W80b of the second step portion 80b, but the width W80a of the first step portion 80a and the width W80b of the second step portion 80b may not be the same.
[0138] like Figure 11 and Figure 12 As shown, the width W80a of the first step 80a can also be smaller than the width W80b of the second step 80b. In the direction of fiber bundle F's movement X, upstream of the intersection point Q, the fiber bundle F passes near the first hole edge 51 and the first slit edge 71, compared to the second hole edge 52 and the second slit edge 72. Therefore, the first step 80a is more likely to affect yarn quality than the second step 80b. Therefore, by making the width W80a of the first step 80a smaller than the width W80b of the second step 80b, the reduction in yarn quality can be more effectively suppressed. Furthermore, Figure 11 and Figure 12 A variation of the first embodiment is shown, but in the second and third embodiments, the width W80a of the first step portion 80a may be smaller than the width W80b of the second step portion 80b.
[0139] In the third embodiment, the suction hole 35 may also be positioned in a direction orthogonal to the extending direction of the suction tube 13. Figure 10 It extends in a way that tilts to the left side of the paper.
[0140] Alternatively, the shape of the suction hole 35 can be made to resemble the shape of the suction slit 64 in the third embodiment, and the shape of the suction slit 64 can be made to resemble the shape of the suction hole 35 in the third embodiment. In other words, as in the second embodiment, a step 80 can be formed by making the suction hole 35 one size larger than the suction slit 64 upstream of the intersection point Q in the moving direction X of the fiber bundle F. In this case, the step 80 is formed by the portion of the first surface 60a of the guide member 16 exposed from the suction hole 35.
Claims
1. A fiber bundle bundling device for a textile machine, comprising: A suction tube, positioned downstream of the drafting device in the direction of fiber bundle movement; and A guiding component, which is installed on the suction tube corresponding to the hanging position of the breathable rubber ring wound around the suction tube, guides the movement of the breathable rubber ring. The suction tube has a suction hole that extends at an angle relative to a direction orthogonal to the extending direction of the suction tube. The guide member has an attraction slit that extends in a manner that overlaps with the attraction hole. The fiber bundle bundling device of the textile machine is characterized in that... The boundary is defined as the intersection of a straight line passing through the upstream end point of the suction hole and orthogonal to the extension direction of the suction tube, and the edge of the suction hole. The width of the step between the aperture edge and the edge of the attraction slit (i.e., the slit edge) upstream of the intersection point in the direction of fiber bundle movement is greater than the width of the step between the aperture edge and the slit edge downstream of the intersection point. The slit edge has an upstream portion, a downstream portion located downstream of the upstream portion, and a connecting portion that connects the downstream end of the upstream portion and the upstream end of the downstream portion. The connection between the downstream portion and the connecting portion overlaps with the intersection point.
2. The fiber bundle bundling device for a textile machine according to claim 1, characterized in that, The width of the step between the aperture edge and the slit edge on the downstream side of the intersection point in the direction of fiber bundle movement is zero.
3. The fiber bundle bundling device for a textile machine according to claim 1 or 2, characterized in that, The hole edge portion includes a first hole edge portion intersecting the straight line and a second hole edge portion located on the opposite side of the first hole edge portion. The width of the step between the first hole edge and the slit edge, located upstream of the intersection point in the direction of fiber bundle movement, is smaller than the width of the step between the second hole edge and the slit edge, located upstream of the intersection point in the direction of fiber bundle movement.