Spinning machine, fiber guide and air jet spinning device

Abstract

The present application provides a spinning machine, a fiber guide, and an air jet spinning device. The air jet spinning device (7) has a fiber guide (31) including a front end face (31c) and an inlet opening (31e). In the fiber guide, a line segment (E) defined as a width of the inlet opening, a straight line (A) passing through a center point (H) of the front end face (31c) and a midpoint of the line segment, a first inclined line (BL) and a second inclined line (CL) obtained by inclining the straight line by +45 degrees and -45 degrees with the center point as a center, a first intersection point (B) and a second intersection point (C) of the intersections of the inclined lines closer to the center point, and a reference straight line (D) passing through the first intersection point and the second intersection point are defined. The fiber guide is configured such that, when viewed in a direction from an axis (31L), the reference straight line is inclined by +10 degrees or more and +80 degrees or less or is inclined by -10 degrees or more and -80 degrees or less with respect to a clamping line (L).

Description

Technical Field

[0001] This invention relates to spinning machines, fiber guides, and air-jet spinning devices. Background Technology

[0002] Previously, a technology related to spinning machines that produce yarn from slivers (fiber bundles) was known. The spinning machine included an air spinning device with an inlet for the fiber bundle. In the spinning machines described in Japanese Patent Application Publication No. 2019-516026 (Patent Document 1) and Japanese Patent Application Publication No. 2007-510822 (Patent Document 2), the sliver is guided to a vortex chamber via an inlet of a spinning nozzle containing a fiber guiding element. In one embodiment described in Patent Document 1, the fiber guiding element is configured to rotate about the central axis of the spinning nozzle. Specifically, the fiber guiding element is configured on the upper roller side of the drafting device, or in a state after rotating 90 degrees relative to the clamping line of the front roller of the drafting device. In the spinning machine described in Patent Document 2, a deflection section is formed by the inclination between the conveying direction and the fiber guiding element.

[0003] In conventional spinning machines with fiber guiding elements having the above-described structure, there is room for improvement in the quality of the produced yarn, such as the yarn uniformity. Summary of the Invention

[0004] The purpose of this invention is to provide a spinning machine, a fiber guide, and an air-jet spinning device that can improve the uniformity of yarn.

[0005] One aspect of the present invention provides a spinning machine comprising: a drafting device having a front roller pair for drafting a fiber bundle; and an air-jet spinning device for generating yarn by applying a swirling airflow to the fiber bundle drafted by the drafting device. The air-jet spinning device has a fiber guide comprising a front end face facing the clamping line of the front roller pair and an inlet opening formed on the front end face. In the fiber guide, a line segment (E) of the longest portion, defined as the inlet opening, and a straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E) are respectively defined. The straight line (A) is inclined along the front end face with the center point (H) as the center. When the fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the first inclined line (BL) obtained by tilting at +45 degrees, the second inclined line (CL) obtained by tilting the straight line (A) at -45 degrees along the front end face with the center point (H) as the center, the first intersection point (B) of the intersection of the inlet opening and the first inclined line (BL) near the center point (H), the second intersection point (C) of the intersection of the inlet opening and the second inclined line (CL) near the center point (H), and the straight line (D) passing through the first intersection point (B) and the second intersection point (C), the straight line (D) is tilted at +10 degrees or more and +80 degrees or less, or tilted at -10 degrees or less and -80 degrees or more, relative to the clamping line.

[0006] Another aspect of the present invention provides a spinning machine comprising: a drafting device having a front roller pair for drafting a fiber bundle; and an air-jet spinning device for generating yarn by applying a swirling airflow to the fiber bundle drafted by the drafting device, the air-jet spinning device having a fiber guide and a spinning chamber, the fiber guide including a front end face facing the clamping line of the front roller pair and an inlet opening formed on the front end face, the spinning chamber being formed inside the air-jet spinning device and having a centerline, wherein the fiber guide is defined by a line segment (E) of the longest portion defined as the inlet opening, a straight line (A) passing through the intersection point (H) of the centerline and the front end face and the midpoint of the line segment (E), and a line segment (A) passing through the intersection point (H). The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (A) is inclined at +45 degrees along the front end face to obtain a first inclined line (BL), the straight line (A) is inclined at -45 degrees along the front end face to obtain a second inclined line (CL) with the intersection point (H) as the center, the first intersection point (B) of the intersection points of the inlet opening and the first inclined line (BL) is closer to the intersection point (H), the second intersection point (C) of the intersection points of the inlet opening and the second inclined line (CL) is closer to the intersection point (H), and the straight line (D) passes through the first intersection point (B) and the second intersection point (C), the straight line (D) is inclined at +10 degrees or more and +80 degrees or less or -10 degrees or more relative to the clamping line.

[0007] In these spinning machines, since the straight line (D) in the inlet opening configured as the fiber guide is inclined at the aforementioned angle relative to the clamping line of the front roller pair, it is possible to bend and gather the fiber bundle in the inlet opening of the fiber guide. As a result, it is possible to improve the uniformity of the yarn.

[0008] Alternatively, the length (G) from the center point (H) of the front end face to the straight line (D) can be 0.5 mm to 4.0 mm, preferably 0.5 mm to 2.5 mm. In this case, the fiber bundle can be spun after applying appropriate tension, resulting in stable yarn quality.

[0009] Alternatively, the length (G) from the intersection point (H) of the centerline and the front end face to the straight line (D) can be 0.5 mm to 4.0 mm, preferably 0.5 mm to 2.5 mm. In this case, the fiber bundle can be spun after applying appropriate tension, resulting in stable yarn quality.

[0010] Alternatively, the fiber guide can be configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at an angle of +15 degrees to +60 degrees or -15 degrees to -60 degrees relative to the clamping line. In this case, it is possible to more appropriately improve the uniformity of the yarn.

[0011] Alternatively, the fiber guide can be configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at an angle of +20 degrees to +50 degrees or less, or at an angle of -20 degrees to -50 degrees or more, relative to the clamping line. In this case, it is possible to further and more appropriately improve the uniformity of the yarn.

[0012] Alternatively, the straight line (D) can be inclined opposite to the direction of the swirling airflow. In this case, the swirling airflow acts on the fiber bundle in the direction of its ascent along the wall of the fiber guide. Tension can be easily imparted to the fiber bundle.

[0013] Alternatively, in the inlet opening of the fiber guide, the length of the line segment (E) is 2 mm to 14 mm, preferably 4 mm to 10 mm, and the maximum height (Z) is 0.3 mm to 6 mm, preferably 0.5 mm to 4 mm. With the above structure, the size and cross-sectional area of ​​the inlet opening are appropriately set to sufficiently maintain the suction flow rate in the fiber guide and to properly bundle the fiber bundle.

[0014] Alternatively, the fiber guide may include an outlet opening formed on the rear end face, the outlet opening having a straight bottom edge that is inclined relative to the straight line (D) of the inlet opening. In this case, the fiber bundle can be further bundled and guided.

[0015] Alternatively, when viewed from the axial direction of the fiber guide, the extension line of the bottom edge of the outlet opening intersects the reference line (D) of the inlet opening. In this case, further convergence of the fiber bundle can be achieved in a more preferred manner.

[0016] As another aspect of the present invention, a fiber guide suitable for an air-jet spinning apparatus includes: a front end face; an inlet opening formed on the front end face; and a chamfered portion formed on the front end face, wherein at least a portion of the boundary between the front end face and the chamfered portion forms a chamfered straight line, wherein a line segment (E) of the width of the longest portion, defined as the inlet opening, a straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E), a first inclined line (BL) obtained by inclining the straight line (A) at +45 degrees along the front end face with the center point (H) of the front end face as the center, and a line segment (E) of the center point (H) of the front end face as the center. When the fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the chamfered line is inclined at -45 degrees to obtain a second inclined line (CL) with the straight line (A) as the center, the first intersection point (B) of the intersection of the front face and the first inclined line (BL) near the center point (H), the second intersection point (C) of the intersection of the front face and the second inclined line (CL) near the center point (H), and the straight line (D) passing through the first intersection point (B) and the second intersection point (C), the fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the chamfered line is inclined at +10 degrees or more and +80 degrees or less relative to the straight line (D) or inclined at -10 degrees or less and -80 degrees or more.

[0017] In this fiber guide, since the chamfered straight line is arranged at the aforementioned angle relative to the straight line (D) in the inlet opening, it is possible to bend and gather the fiber bundle within the fiber guide. As a result, it is possible to improve the uniformity of the yarn.

[0018] Alternatively, the chamfer line can be configured such that, when viewed from the axial direction of the fiber guide, it is inclined at an angle of +15 degrees to +60 degrees relative to the line (D), or at an angle of -15 degrees to -60 degrees. In this case, it is possible to more appropriately improve the uniformity of the yarn.

[0019] Alternatively, the chamfer line can be configured such that, when viewed from the axial direction of the fiber guide, it is inclined at an angle of +20 degrees to +50 degrees relative to the line (D), or at an angle of -20 degrees to -50 degrees. In this case, it is possible to further and more appropriately improve the uniformity of the yarn.

[0020] Alternatively, the chamfered straight line can be formed from the first perimeter of the front end face to the second perimeter. Due to the longer straight section, visual visibility is improved for the operator. Therefore, the positioning accuracy of the fiber guide relative to the clamping line of the front roller pair can be improved.

[0021] Alternatively, a chamfered portion and a second chamfered portion can be formed on the front end face, with a chamfered line corresponding to at least a portion of the boundary between the front end face and the chamfered portion, and a second chamfered line corresponding to at least a portion of the boundary between the front end face and the second chamfered portion being parallel to each other. In this case, the fiber guide can be positioned close to the front roller pair.

[0022] Alternatively, a chamfered portion and a third chamfered portion are formed on the front end face, and a chamfered line corresponding to at least a portion of the boundary of the front end face and the chamfered portion, and a third chamfered line corresponding to at least a portion of the boundary of the front end face and the third chamfered portion, are connected at a connection point located in the surface of the front end face other than the periphery.

[0023] Alternatively, one of the chamfered line and the third chamfered line can be arranged parallel to the line (D). In this case, positioning of the fiber guide relative to the clamping line is easy.

[0024] Alternatively, in the inlet opening, the length of the line segment (E) is 2 mm to 14 mm, preferably 4 mm to 10 mm, and the maximum height (Z) is 0.3 mm to 6 mm, preferably 0.5 mm to 4 mm. According to the above structure, the size and cross-sectional area of ​​the inlet opening are appropriately set to sufficiently maintain the suction flow and properly bundle the fiber bundle.

[0025] Alternatively, the length (G) from the center point (H) of the front end face to the straight line (D) can be 0.5 mm to 4.0 mm, preferably 0.5 mm to 2.5 mm. In this case, the fiber bundle can be spun after applying appropriate tension, and the quality of the yarn is stable.

[0026] Alternatively, the fiber guide may have an outlet opening formed on a rear end face opposite to the front end face, the outlet opening having a straight bottom edge that is inclined relative to the straight line (D) of the inlet opening. In this case, the fiber bundle can be further bundled and guided.

[0027] Another aspect of the air-jet spinning apparatus of the present invention comprises: a fiber guide having a front end face with an inlet opening; and a support block supporting the fiber guide and being detachably mounted relative to a main body, the support block having a reference surface facing the main body. In the fiber guide, a line segment (E) defined as the inlet opening with the width of its longest portion, a straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E), a first inclined line (BL) obtained by tilting the straight line (A) at +45 degrees along the front end face with the center point (H) as the center, and a line segment (E) with the center point as the center are respectively defined. When the fiber guide is centered at (H) and the straight line (A) is inclined at -45 degrees along the front end face to obtain the second inclined line (CL), the first intersection point (B) of the intersection of the inlet opening and the first inclined line (BL) near the center point (H), the second intersection point (C) of the intersection of the inlet opening and the second inclined line (CL) near the center point (H), and the straight line (D) passing through the first intersection point (B) and the second intersection point (C), the fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more and +80 degrees or less, or inclined at -10 degrees or less and -80 degrees or more, relative to the reference plane of the support block.

[0028] Another aspect of the air-jet spinning apparatus of the present invention includes: a fiber guide having a front end face with an inlet opening; a support block supporting the fiber guide; and a rotation shaft supporting the support block in a rotatable manner. In the fiber guide, a line segment (E) defined as the inlet opening with the longest width is defined, a straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E), a first inclined line (BL) obtained by inclining the straight line (A) at +45 degrees along the front end face with the center point (H) as the center, and a straight line (BL) centered at the center point (H) is further defined. (A) When the fiber guide is inclined at -45 degrees along the front end face, the second inclined line (CL), the first intersection point (B) of the intersection of the inlet opening and the first inclined line (BL) near the center point (H), the second intersection point (C) of the intersection of the inlet opening and the second inclined line (CL) near the center point (H), and the straight line (D) passing through the first intersection point (B) and the second intersection point (C), the fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more and +80 degrees or less, or inclined at -10 degrees or less and -80 degrees or more, relative to the rotation axis of the rotation axis.

[0029] In air-jet spinning apparatuses, the reference plane of the support block is usually parallel or nearly parallel to the clamping line of the front roller pair. Even in structures where the support block is integrally formed with the main body (i.e., structures where the support block cannot be detached from the main body), the axis of rotation of the support block is usually parallel or nearly parallel to the clamping line of the front roller pair. In the aforementioned air-jet spinning apparatus, the straight line (D) in the inlet opening of the fiber guide can be inclined relative to the clamping line of the front roller pair. In the fiber guide, the fiber bundle can be bent and gathered. As a result, the uniformity of the yarn can be improved. Attached Figure Description

[0030] Figure 1 This is a front view of the spinning machine according to the first embodiment of the present invention.

[0031] Figure 2 yes Figure 1 The side view of the spinning unit of the spinning machine shown.

[0032] Figure 3 yes Figure 1 A perspective view of the air-jet spinning device shown.

[0033] Figure 4 yes Figure 1 A cross-sectional view of the air-jet spinning device shown.

[0034] Figure 5 middle, Figure 5 (a) is Figure 4 Front view of the fiber guide in the image. Figure 5 (b) is Figure 4 A top view of the fiber guide in the middle. Figure 5 (c) is Figure 4 The right view of the fiber guide in the middle, and Figure 5 (d) is Figure 4 Rear view of the fiber guide in the image.

[0035] Figure 6 This is a diagram viewed from the axial direction of the fiber guide in the first embodiment, and it shows the configuration of the fiber guide relative to the nip line of the front roller pair.

[0036] Figure 7 It is used for explanation Figure 6 The diagram defines the imaginary straight line D in the fiber guide.

[0037] Figure 8 middle, Figure 8 (a)~ Figure 8 (g) are diagrams representing various deformation methods of the inlet opening.

[0038] Figure 9This is a diagram showing the arrangement of the fiber guide relative to the clamping lines of the front roller pair in the second embodiment.

[0039] Figure 10 Viewed from the back side Figure 9 The diagram shows the configuration of the fiber guides.

[0040] Figure 11 This is a diagram used to illustrate the configuration of the fiber guide from other perspectives.

[0041] Figure 12 This is a diagram showing a modified example of a fiber guide and its configuration. Detailed Implementation

[0042] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, the same or equivalent parts are labeled with the same reference numerals in the various figures, and repeated descriptions are omitted.

[0043] like Figure 1 As shown, the spinning machine 1 includes multiple spinning units 2, a receiving carriage 3, a doffing carriage (not shown), a first end frame 4, and a second end frame 5. The multiple spinning units 2 are arranged in a row. Each spinning unit 2 generates yarn Y and winds it into a package P. If yarn Y is cut or breaks for some reason in a certain spinning unit 2, the receiving carriage 3 performs a receiving operation in that spinning unit 2. When the package P in a certain spinning unit 2 is fully wound, the doffing carriage does the doffing of the package P and supplies a new yarn tube 20 to that spinning unit 2. The first end frame 4 houses a recovery device for collecting fiber scraps and thread ends generated in the spinning units 2.

[0044] The second end frame 5 houses an air supply unit that adjusts the pressure of compressed air supplied to each part of the spinning machine 1 and supplies air to each part, and a drive motor for supplying power to each part of the spinning unit 2. The second end frame 5 is equipped with a machine control device 100, a touch panel screen 102, and input keys 104. The machine control device 100 centrally manages and controls each part of the spinning machine 1. The touch panel screen 102 can display information related to the settings and / or status of the spinning unit 2. Operators can perform settings operations on the spinning unit 2 by using the buttons displayed on the touch panel screen 102 or the input keys 104.

[0045] like Figure 1 and Figure 2As shown, each spinning unit 2, in the direction of yarn travel Y, sequentially includes, from the upstream side, a drafting device 6, an air-jet spinning device 7, a yarn monitoring device 8, a tension sensor 9, a yarn retention device 11, a waxing device 12, and a winding device 13. A unit controller 10 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2.

[0046] The drafting device 6 drafts the fiber bundle (yarn) S. The drafting device 6 has, from the upstream side, a rear roller pair 14, a third roller pair 15, an intermediate roller pair 16, and a front roller pair 17 in the direction of travel of the fiber bundle S.

[0047] The rear roller pair 14 includes a rear lower roller 14a on the drive side and a rear upper roller 14b on the driven side. The rear lower roller 14a and the rear upper roller 14b are opposite each other across the travel path for the fiber bundle S. The third roller pair 15 includes a third lower roller 15a on the drive side and a third upper roller 15b on the driven side. The third lower roller 15a and the third upper roller 15b are opposite each other across the travel path for the fiber bundle S. The intermediate roller pair 16 includes an intermediate lower roller 16a on the drive side and an intermediate upper roller 16b on the driven side. The intermediate lower roller 16a and the intermediate upper roller 16b are opposite each other across the travel path for the fiber bundle S. The front roller pair 17 includes a front lower roller 17a on the drive side and a front upper roller 17b on the driven side. The front lower roller 17a and the front upper roller 17b are opposite each other across the travel path for the fiber bundle S.

[0048] The rear lower roller 14a, the third lower roller 15a, the middle lower roller 16a, and the front lower roller 17a rotate at different speeds via a drive motor located in the spinning unit 2, with the lower rollers rotating at increasingly faster speeds. A belt 18a is provided for the middle lower roller 16a. A belt 18b is provided for the middle upper roller 16b. The front lower roller 17a can also be driven by a drive motor located within the second end frame 5, which is shared by multiple spinning units 2.

[0049] The rear upper roller 14b, the third upper roller 15b, the middle upper roller 16b, and the front upper roller 17b are rotatably supported on the drafting cradle (not shown). The rear upper roller 14b, the third upper roller 15b, the middle upper roller 16b, and the front upper roller 17b are in contact with the rear lower roller 14a, the third lower roller 15a, the middle lower roller 16a, and the front lower roller 17a respectively at a specified pressure and rotate automatically.

[0050] The air-jet spinning device 7 generates yarn Y by twisting the fiber bundle F, which has been drawn by the drafting device 6, using a swirling airflow. Details about the air-jet spinning device 7 are described later.

[0051] The yarn monitoring device 8 monitors the information of the traveling yarn Y between the air-jet spinning device 7 and the yarn retention device 11, and detects the presence of yarn defects based on the monitored information. If a yarn defect is detected, the yarn monitoring device 8 sends a yarn defect detection signal to the unit controller 10. For example, the yarn monitoring device 8 detects abnormalities in the thickness of the yarn Y and / or foreign matter contained in the yarn Y as yarn defects. The yarn monitoring device 8 also detects yarn breaks, etc. The tension sensor 9 measures the tension of the traveling yarn Y between the air-jet spinning device 7 and the yarn retention device 11, and sends a tension measurement signal to the unit controller 10. If the unit controller 10 determines that an abnormality exists based on the detection results of the yarn monitoring device 8 and / or the tension sensor 9, it cuts the yarn Y in the spinning unit 2. Specifically, the supply of air to the air-jet spinning device 7 is stopped, and the generation of the yarn Y is interrupted, thereby cutting the yarn Y. Alternatively, the yarn Y can be cut by a separately installed cutter.

[0052] The waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

[0053] The yarn retention device 11 stores yarn Y between the air-jet spinning device 7 and the winding device 13. The yarn retention device 11 includes a yarn retention roller that stores yarn Y by winding it around its outer peripheral surface. The yarn retention device 11 has the following functions: stably drawing yarn Y from the air-jet spinning device 7; preventing yarn Y from slackening by retaining it during yarn feeding operations such as those performed by the yarn feeding carriage 3; and preventing tension variations in the yarn Y located downstream of the yarn retention device 11 from being transmitted to the air-jet spinning device 7.

[0054] The winding device 13 winds yarn Y onto the yarn tube 20 to form a package P. The winding device 13 has a rocker arm 21, a winding drum 22, and a traverse guide 23. The rocker arm 21 supports the yarn tube 20 in a rotatable manner. The rocker arm 21 is supported by a support shaft 24 in a swingable manner, and the surface of the yarn tube 20 or the package P contacts the surface of the winding drum 22 with appropriate pressure. A drive motor (not shown) provided on the second end frame 5 simultaneously drives the winding drums 22 of multiple spinning units 2. As a result, the yarn tube 20 or the package P is rotated in the winding direction in each spinning unit 2. The traverse guide 23 of each spinning unit 2 is provided on a shaft 25 shared by multiple spinning units 2. The drive motor of the second end frame 5 reciprocates the shaft 25 in the direction of rotation of the winding drum 22, thereby causing the traverse guide 23 to traverse the yarn Y relative to the rotating yarn tube 20 or the package P with a predetermined amplitude.

[0055] In the event that yarn Y is cut or breaks for some reason in a spinning unit 2, the yarn splicing carriage 3 travels to that spinning unit 2 and performs a splicing operation. The yarn splicing carriage 3 has a splicing device 26, a suction tube 27, and a suction nozzle 28. The suction tube 27 is rotatably supported by a support shaft 27a, captures yarn Y from the air-jet spinning device 7, and guides it to the splicing device 26. The suction nozzle 28 is rotatably supported by a support shaft 27b, captures yarn Y from the winding device 13, and guides it to the splicing device 26. The splicing device 26 splices the guided yarns Y together. The splicing device 26 may be a twister using compressed air or a knotter that mechanically connects the yarns Y, etc.

[0056] When the yarn receiving carriage 3 performs the yarn receiving action, the package P is rotated in the reverse winding direction (reverse rotation). At this time, the rocker arm 21 is moved by a cylinder (not shown) to separate the package P from the winding drum 22, and the package P is reversed by the reversing roller (not shown) provided on the yarn receiving carriage 3.

[0057] Next, refer to Figure 3 and Figure 4 A detailed description of the air-jet spinning device 7 is provided. Figure 3 , Figure 4 In some subsequent drawings, an orthogonal xyz coordinate system is included as a reference for the position or arrangement of components or constituent elements. Furthermore, Figure 3 The xyz orthogonal coordinate system shown is based on the nozzle cover 30 rather than the hollow guide shaft 34.

[0058] like Figure 3 and Figure 4 As described, the air-jet spinning device 7 includes a nozzle cover 30 and a hollow guide shaft 34. The nozzle cover 30 includes a nozzle holder (support block) 37, a fiber guide 31, a spinning chamber 32, and a nozzle block 38. The hollow guide shaft 34 includes a yarn passage 35 and a second nozzle 36. The operation of the air-jet spinning device 7 is controlled by a unit controller 10. Alternatively, the second nozzle 36 may not be provided.

[0059] The fiber guide 31 and the nozzle block 38 are fixed to the nozzle holder 37, which is the main body of the nozzle cover 30. The fiber guide 31 and the nozzle block 38 are fixed to the nozzle holder 37, for example, by a nozzle cap 39. In the nozzle cover 30, the fiber guide 31 and the nozzle block 38 are configured as separate parts, but the fiber guide 31 and the nozzle block 38 may also be configured as an integral part or as a single component.

[0060] like Figure 4As shown, the fiber guide 31 is a component that guides the drafted fiber bundle F toward the interior of the air-jet spinning device 7. The fiber guide 31 has a fiber inlet passage 31a, a needle-like component 31b, a front end face 31c, and a rear end face 31d formed therein. The fiber guide 31 has an inlet opening 31e of the fiber inlet passage 31a (see reference). Figure 5 (a) and the outlet opening 31f of the fiber inlet path 31a (refer to) Figure 5 (d) An inlet opening 31e is formed on the front end face 31c, and an outlet opening 31f is formed on the rear end face 31d. The inlet opening 31e is the intersection line between the fiber guide path 31a and the front end face 31c. The outlet opening 31f is the intersection line between the fiber guide path 31a and the rear end face 31d. An "intersection line" refers to a connecting line that connects a surface (front end face 31c or rear end face 31d) to a wall forming a space (fiber guide path 31a). The fiber guide 31 guides the fiber bundle F into the spinning chamber 32 through the fiber guide path 31a, which communicates with the spinning chamber 32. When a needle-shaped member 31b is provided, the fiber bundle F is guided into the spinning chamber 32 via the needle-shaped member 31b.

[0061] The nozzle block 38 has a first nozzle 33. A spinning chamber 32 is formed by the nozzle block 38 and the rear end face 31d of the fiber guide 31. That is, a spinning chamber 32 is formed inside the air-jet spinning device 7. The first nozzle 33 is disposed around the spinning chamber 32 (the path along which the fiber bundle F travels). The air-jet spinning device 7 injects air from the first nozzle 33 into the spinning chamber 32, causing a swirling airflow to act on the fiber bundle F within the spinning chamber 32. This swirling airflow reverses and rotates the fiber ends of the multiple fibers constituting the fiber bundle F.

[0062] The hollow guide shaft 34 is a cylindrical component with a yarn passage 35 formed inside. The hollow guide shaft 34 guides the generated yarn Y-direction to the outside of the air-jet spinning device 7.

[0063] When the spinning process begins, the air-jet spinning device 7 generates a swirling airflow within the yarn passage 35 by injecting air from the second nozzle 36 into the yarn passage 35. The direction of the swirling airflow generated within the yarn passage 35 is opposite to the direction of the swirling airflow in the spinning chamber 32. This guides the fiber bundle F from the drafting device 6 into the air-jet spinning device 7, initiating the generation of yarn Y.

[0064] Alternatively, the needle-like component 31b can be omitted, and the downstream end of the fiber guide 31 can have the function of the needle-like component 31b.

[0065] When the yarn Y is connected via a piecing, air is ejected from the second nozzle 36 in order to feed the yarn Y from the package P back into the air-jet spinning device 7.

[0066] like Figure 3 As shown, in the air-jet spinning device 7, the nozzle cover 30 is detachable from the main body 40. The air-jet spinning device 7 includes: a nozzle block 38 supporting the fiber guide 31; a nozzle holder 37 supporting the fiber guide 31 and the nozzle block 38; and a nozzle cover 30 that is detachably mounted to the main body 40. The nozzle cover 30 is connected and fixed to the main body 40 by bolts B1 or the like. The main body 40 is configured to be able to swing about the base end 41 as a fulcrum.

[0067] The air-jet spinning device 7 includes a support portion 50 that supports a hollow guide shaft 34. The support portion 50 is configured to swing about its base end 51. The base end 41 of the main body 40 and the base end 51 of the support portion 50 are mounted in a manner that allows them to rotate about a rotating shaft 43. The rotating shaft 43 is fixed to the machine frame 1a (see reference). Figure 1 The support 50 is driven by a cylinder or other means (not shown) and swings about the rotation axis 43 in a direction closer to the main body 40 and in a direction farther away from the main body 40. The support 50 is fixed to the machine frame 1a via a spring member 44 and is forced in the direction closer to the main body 40.

[0068] Reference Figure 5 and Figure 6 The structure and configuration of the fiber guide 31 are described in detail. Figure 5 (a) and Figure 6 As shown, the fiber guide 31 has, for example, a circular front end face 31c. For example, the fiber guide 31, which is generally cylindrical, has an axis 31L. The axis 31L is the center line of the spinning chamber 32. The axis 31L of the fiber guide 31 passes through the center point H of the front end face 31c. Figure 6 The y-direction shown is parallel to the axis 31L. (As shown) Figure 5 As shown in (c), a groove can also be formed circumferentially on the outer peripheral surface of the fiber guide 31, which is cylindrical in shape.

[0069] The fiber guide 31, for example, has a first chamfered portion 61 and a second chamfered portion 62 formed on the front end face 31c. The position and size of the first chamfered portion 61 and the second chamfered portion 62 are not particularly limited, but in this embodiment, the first chamfered portion 61 and the second chamfered portion 62 are formed at different positions and are separated from each other. An inlet opening 31e is disposed between the first chamfered portion 61 and the second chamfered portion 62. The boundary between the front end face 31c and the first chamfered portion 61 forms a first chamfer line J. The front end face 31c and the first chamfered portion 61 are connected by the first chamfer line J. The first chamfer line J extends from one periphery (first periphery) 71a of the front end face 31c to the other periphery (second periphery) 71b. The boundary between the front end face 31c and the second chamfered portion 62 forms a second chamfer line J1. The front end face 31c and the second chamfered portion 62 are connected by the second chamfer line J1. The second chamfered straight line J1 is formed from one periphery (first periphery) 72a of the front end face 31c to the other periphery (second periphery) 72b.

[0070] The first chamfer line J and the second chamfer line J1 are chords in the front end face 31c. The first chamfer line J, corresponding to the boundary between the front end face 31c and the first chamfered portion 61, and the second chamfer line J1, corresponding to the boundary between the front end face 31c and the second chamfered portion 62, are, for example, parallel to each other. Figure 5 (b) and Figure 5 As shown in (c), the first chamfered portion 61 and the second chamfered portion 62 may have the same size, or they may have different sizes. Alternatively, the first chamfered portion 61, which is positioned closer to the inlet opening 31e, may be smaller than the second chamfered portion 62.

[0071] The inlet opening 31e of the fiber guide 31 is, for example, an elongated hole extending in a certain direction. The inlet opening 31e extends, for example, along the first chamfered line J. The inlet opening 31e may also be parallel to the first chamfered line J and / or the second chamfered line J1. That is, one of the first chamfered line J and the second chamfered line J1 may not be parallel to the inlet opening 31e.

[0072] Figure 6 The arrangement of the fiber guide 31 in the drafting device 6 and the air-jet spinning device 7 is shown. Figure 6 In the diagram, an imaginary line is used to represent the clamping line L where the front upper roller 17b and the front lower roller 17a abut. Figure 6 The x-direction shown is parallel to the clamping line L. The front end face 31c of the fiber guide 31 faces the clamping line L. Figure 6 As shown, when viewed from the axis 31L of the fiber guide 31, the inlet opening 31e is inclined clockwise relative to the clamping line L. The inclination angle θ is an acute angle. Although the illustration is omitted, multiple grooves parallel to the roller axis can also be formed on the front lower roller 17a.

[0073] To clearly illustrate the configuration (layout) of the fiber guide 31, imaginary lines and points are defined on the fiber guide 31. For example... Figure 7 As shown, line segment E is defined as the width of the longest portion of the inlet opening 31e. Line A is defined as the line passing through the center point H of the front end face 31c and the midpoint of line segment E. The first inclined line BL is defined as the line obtained by tilting line A at +45 degrees along the front end face 31c with the center point H as the center. The second inclined line CL is defined as the line obtained by tilting line A at -45 degrees along the front end face 31c with the center point H as the center. The first intersection point B is defined as the point closest to the center point H among the intersection points of the inlet opening 31e and the first inclined line BL. The second intersection point C is defined as the point closest to the center point H among the intersection points of the inlet opening 31e and the second inclined line CL. The reference line D is defined as the line passing through the first intersection point B and the second intersection point C. These lines and points are not limited to the inlet opening 31e of the fiber guide 31 in this embodiment, but can be defined in all types of fiber guides.

[0074] like Figure 6 As shown, when viewing the front end face 31c from the direction of axis 31L, the fiber guide 31 is configured such that the reference straight line D is inclined at an angle θ of +10 degrees to +80 degrees relative to the clamping line L. In this specification, the inclination angle θ is defined as an angle with an absolute value of 180 degrees or less formed between the clamping line L and the reference straight line D. Regarding the inclination angle θ, when viewing the front end face 31c from the direction of axis 31L, a clockwise inclination is defined as a positive angle and a counterclockwise inclination as a negative angle. For example, the orientation (posture) of the fiber guide 31 is defined as follows: hypothetically, all or more of the inlet opening 31e is positioned on the front upper roller 17b side (the driven roller side of the front roller pair 17) relative to the clamping line L, and the reference straight line D is parallel to the clamping line L. Figure 6 In the diagram, the inlet opening 31e of the fiber guide 31 located at the reference orientation and the reference straight line D are represented by imaginary lines. The actual orientation of the fiber guide 31 mounted on the nozzle cover 39 is rotated from the reference orientation in a direction with the same tilt angle θ as described above.

[0075] The aforementioned line A may not be defined with the center point H of the front end face 31c as the reference. In other viewpoints, line A can be defined as a straight line passing through the intersection of the axis 31L (which serves as the center line of the spinning chamber 32) and the front end face 31c, and the midpoint of line segment E. In this embodiment, the intersection of the axis 31L and the front end face 31c coincides with the center point H of the front end face 31c. However, if the front end face 31c (in its shape without considering the aforementioned chamfer) is not a perfect circle and its center cannot be defined, then line A can be defined with the intersection of the axis 31L and the front end face 31c as the reference.

[0076] Preferably, the fiber guide 31 is configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ relative to the clamping line L at an angle of +15 degrees to +60 degrees. More preferably, the fiber guide 31 is configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ relative to the clamping line L at an angle of +20 degrees to +50 degrees.

[0077] When viewed from the axis 31L, the reference line D is inclined in the opposite direction to the swirling airflow generated in the spinning chamber 32. For example, when viewed from the axis 31L, the swirling airflow is directed counterclockwise, and the reference line D of the inlet opening 31e is inclined clockwise relative to the clamping line L.

[0078] In the entrance opening 31e, the length (i.e., maximum width) of line segment E is 2 mm to 14 mm, and the maximum height Z is 0.3 mm to 6 mm. The maximum height Z can be defined at the position where the maximum height is achieved in the width direction of the entrance opening 31e. The height of the entrance opening 31e is its length in the direction of line A. For example... Figure 7 As shown, when the entrance opening 31e has a uniform height, the maximum height Z can also be the height at any position (constant and unchanging). Preferably, the length of line segment E is 4 mm to 10 mm, and the maximum height Z is 0.5 mm to 4 mm.

[0079] In the inlet opening 31e, the length G from the center point H of the front end face 31c to the reference line D is 0.5 mm to 4.0 mm. Preferably, the length G is 0.5 mm to 2.5 mm. The length G may also not be defined with the center point H of the front end face 31c as the reference. In other views, the length G may also be defined as the length from the intersection of the axis 31L and the front end face 31c to the reference line D.

[0080] like Figure 5 As shown in (d), the outlet opening 31f of the fiber guide 31 includes a straight bottom edge 31k. The bottom edge 31k of the outlet opening 31f is, for example, parallel to the reference line D of the inlet opening 31e. Therefore, when viewed from the direction of the axis 31L, the bottom edge 31k of the outlet opening 31f is also inclined relative to the clamping line L. The inclination angle of the bottom edge 31k relative to the clamping line L can be the same as or different from the aforementioned inclination angle θ.

[0081] In the spinning machine 1 equipped with the air-jet spinning device 7 of this embodiment, since the reference straight line D in the inlet opening 31e of the fiber guide 31 is inclined at the aforementioned inclination angle θ relative to the clamping line L of the front roller pair 17, it is possible to moderately bend the fiber bundle F in the fiber guide 31 and to gather the fiber bundle F. As a result, the uniformity of the yarn Y can be improved.

[0082] According to the air-jet spinning device 7 of the spinning machine 1, the fiber bundle F can be well bundled, improving the inter-fiber constraint. By improving the inter-fiber constraint, fiber loss in the area between the front roller pair 17 and the front end of the hollow guide shaft 34 can also be reduced. Conventionally, to improve the inter-fiber constraint, solutions could be envisioned such as increasing the bend imposed on the fiber bundle or bundling the fiber bundle. Increasing the bend imposed on the fiber bundle can be achieved by raising the position of the inlet opening of the fiber guide (away from the axis). In addition, to improve the bundle bundling performance, two solutions could be envisioned: bundling the fiber bundle S in the drafting device 6 or bundling the fiber bundle F using the fiber guide. However, when bundling the fiber bundle S using the drafting device 6, poor drafting and / or slippage of the drafting roller may occur when the fiber quantity is large. Furthermore, to bundling the fiber bundle F using the fiber guide, the cross-sectional area of ​​the inlet opening needs to be significantly reduced. If the cross-sectional area of ​​the inlet opening of the fiber guide is significantly reduced, the fiber bundle attraction performance of the air-jet spinning device may decrease. Therefore, it is difficult to improve the convergence of the fiber bundle F entering the fiber guide without degrading the performance of the fiber guide. However, according to this embodiment, the convergence of the fiber bundle F entering the fiber guide 31 is improved without degrading the performance of the fiber guide 31.

[0083] By inclining the reference straight line D, as in the fiber guide 31 of this embodiment, the fiber bundle F can be bundled near the inlet opening 31e. This has the following advantages compared to the case where the fiber bundle F is bundled near the outlet. That is, the bundling interval is longer, and the shape of the fiber guide 31 can be very simple. Therefore, the manufacturing of the fiber guide 31 is also easy. According to the fiber guide 31 of this embodiment, the fiber bundle F can be easily bundled even without significantly changing (e.g., without reducing) the cross-sectional area of ​​the fiber inlet path 31a.

[0084] In the fiber guide 31 of this embodiment, the length G from the center point H of the front end face 31c to the reference line D, or the length G from the intersection of the axis 31L and the front end face 31c to the reference line D, is 0.5 mm or more and 4.0 mm or less, preferably 0.5 mm or more and 2.5 mm or less. The length G from the center point H of the front end face 31c to the reference line D is the distance between the center point H and the reference line D. The length G from the intersection of the axis 31L and the front end face 31c to the reference line D is the distance between the intersection of the axis 31L and the front end face 31c and the reference line D. The distance between a point and a line means the shortest distance. For example, the length from the center point H to the first intersection point B or the second intersection point C is not the length G (it is significantly longer than the length G). According to the above structure, the fiber bundle F can be spun after applying appropriate tension, and the quality of the yarn Y is stable. In the past, it was possible that the fiber bundle F could not be tensioned, resulting in fiber shedding, or that the fiber could become difficult to reverse due to excessive tension, but this embodiment avoids these situations.

[0085] When viewed from the axis 31L of the fiber guide 31, the reference straight line D is inclined at an angle θ of +15 degrees to +60 degrees relative to the clamping line L. This allows for a more appropriate improvement in the uniformity of the yarn Y.

[0086] If, when viewed from the axis 31L of the fiber guide 31, the reference straight line D is inclined at an angle θ of +20 degrees to +50 degrees relative to the clamping line L, then the uniformity of the yarn Y can be further improved more appropriately.

[0087] The reference straight line D is inclined in the opposite direction to the swirling airflow within the spinning chamber 32. As a result, the swirling airflow acts on the fiber bundle F in its ascending direction along the wall of the fiber guide 31. Therefore, it is easy to impart tension to the fiber bundle F.

[0088] In the inlet opening 31e of the fiber guide 31, the length of the line segment E is 2 mm to 14 mm, preferably 4 mm to 10 mm, and the maximum height Z is 0.3 mm to 6 mm, preferably 0.5 mm to 4 mm. Based on the above structure, the size and cross-sectional area of ​​the inlet opening 31e are appropriately set to sufficiently maintain the suction flow and properly bundle the fiber bundle F.

[0089] The first chamfered straight line J is formed from the periphery 71a of the front end face 31c to the periphery 71b. The second chamfered straight line J1 is formed from the periphery 72a of the front end face 31c to the periphery 72b. Due to the longer straight sections, the visual visibility of the fiber guide 31 is improved for the operator. Therefore, the positioning accuracy of the fiber guide 31 relative to the clamping line L of the front roller pair 17 can be improved.

[0090] A first chamfered portion 61 and a second chamfered portion 62 are formed on the front end face 31c, and the first chamfered line J and the second chamfered line J1 are parallel to each other. As a result, the fiber guide 31 can be positioned close to the front roller pair 17.

[0091] The present invention has been described above as one embodiment, but the present invention is not limited to the above embodiment. The above embodiment and the following variations can also be appropriately combined.

[0092] In the above embodiment, the fiber guide 31 is configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ of +10 degrees to +80 degrees relative to the clamping line L. However, the fiber guide 31 may also be configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ of -10 degrees to -80 degrees or more relative to the clamping line L. In this case, preferably, the fiber guide 31 is configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ of -15 degrees to -60 degrees or more relative to the clamping line L. More preferably, the fiber guide 31 is configured such that, when viewed from the axis 31L direction, the reference straight line D is inclined at an angle θ of -20 degrees to -50 degrees or more relative to the clamping line L. Even with this configuration, it is possible to moderately bend the fiber bundle F in the fiber guide 31 and to gather the fiber bundle F. As a result, the uniformity of the yarn Y can be improved.

[0093] The shape of the inlet opening 31e is not limited to the elongated hole shape shown in the above embodiment. For example, the inlet opening 31e may also have... Figure 8 (b) Figure 8 The various shapes shown by (g). For example... Figure 8 As shown in (b), the fiber guide may also have an inlet opening 80B, which is a rectangular elongated hole extending along the x-direction. Figure 8 As shown in (c), the fiber guide may also have an inlet opening 80C, which is an elliptical elongated hole extending along the x-direction. Figure 8 As shown in (d), the fiber guide may also have an inlet opening 80D, which is an elongated hole extending in the x-direction, comprising a straight bottom edge and an upper edge forming part of an arc shape. Figure 8 As shown in (e), the fiber guide may also have an inlet opening 80E, which, like the inlet opening 80B, is a rectangular elongated hole, but its bottom edge includes, for example, a semi-circular protrusion (a recess in the front end face 31c). Figure 8As shown in (f), the fiber guide may also have an inlet opening 80F, which, like the inlet opening 80B, is a rectangular elongated hole, but its bottom edge includes, for example, a semi-circular recess (the protrusion in the front end face 31c). Figure 8 As shown in (g), the fiber guide may also have an inlet opening 80G, which is an elongated pentagonal hole comprising a straight upper side and a bottom side formed by two sides intersecting at a predetermined angle of 90 degrees or more but less than 180 degrees, extending in the x-direction. Even for any of these shapes, the straight line D is defined in the same way as in the above embodiment, and the straight line D is inclined within the same range as in the above embodiment.

[0094] In the above embodiment, the inlet opening 31e (more specifically, the reference line D) is parallel to the first chamfer line J and / or the second chamfer line J1. However, as Figure 9 As shown, it can also be configured such that, when viewed from the axis 31L of the fiber guide 31, the first chamfer line J and / or the second chamfer line J1 are inclined at an angle of +10 degrees to +80 degrees relative to the reference line D. Even in this case, when viewed from the axis 31L, the reference line D is inclined at an angle θ of +10 degrees to +80 degrees relative to the clamping line L. It can also be configured such that, when viewed from the axis 31L of the fiber guide 31, the first chamfer line J and / or the second chamfer line J1 are inclined at an angle of -10 degrees to -80 degrees relative to the reference line D.

[0095] The fiber guide 31 can also be used to bend and gather the fiber bundle F. As a result, the uniformity of the yarn Y can be improved.

[0096] In addition, such as Figure 10 As shown, the fiber guide 31 may also include an outlet opening 31f formed on the rear end face 31d, the outlet opening 31f having a straight bottom edge 31k. The bottom edge 31k of the outlet opening 31f may also be inclined relative to the reference straight line D of the inlet opening 31e. In this case, the fiber bundle F can be further bundled and guided.

[0097] When viewed from the axis 31L, the reference line D of the inlet opening 31e and the bottom edge 31k of the outlet opening 31f are not parallel, and their respective extensions intersect each other. The angle formed by the reference line D and the bottom edge 31k is 0 degrees or more. In this case, further convergence of the fiber bundle F can be achieved in a more preferred manner.

[0098] The reference line representing the inclination angle θ of the reference line D does not need to be the clamping line L mentioned above. For example... Figure 11As shown, alternatively, the reference surface R of the nozzle cover 30, which is detachable from the main body 40, can be set as a reference surface (reference line) with an inclination angle θ, instead of the clamping line L. The reference surface R faces the main body 40. Alternatively, the nozzle cover 30 may not be detachable from the main body 40 but may be integrally formed. In this case, the rotation axis 43L of the rotation shaft 43 that supports the nozzle cover 30 in a rotatable manner can be set instead of the clamping line L (see also...). Figure 3 () serves as the baseline for the tilt angle θ.

[0099] like Figure 12 As shown, alternatively, a first chamfered portion 61, a second chamfered portion 62, and a third chamfered portion 63 may be formed on the front end face 31c. The second chamfered line J1 and the third chamfered line J2 are connected at a connection point PJ located on the surface of the front end face 31c, excluding the periphery. The second chamfered line J1 extends from the periphery 72a of the front end face 31c to the connection point PJ. The third chamfered line J2 extends from the periphery 73a of the front end face 31c to the connection point PJ.

[0100] The third chamfered line J2 is arranged parallel to the reference line D. Since the front end face 31c of the fiber guide 31 has a portion parallel to the reference line D, positioning of the fiber guide 31 relative to the clamping line L is easy. Furthermore, the second chamfered line J1 can be equivalent to the "chamfered line" described in the claims, and the third chamfered line J2 can be equivalent to the "third chamfered line" described in the claims. Figure 12 In the configuration shown, the first chamfered portion 61 can also be omitted and the first chamfered straight line J can be omitted.

[0101] The number and / or shape of the chamfered portions are not particularly limited to the above embodiments and variations. It is also possible to omit the chamfered portions from the front end face 31c, or to provide four or more chamfered portions. When four or more chamfered portions are provided, the number of chamfered portions (including zero) on each side relative to the center point H of the front end face 31c can also be different.

[0102] The entrance opening 31e may also be formed to include at least one chamfered portion.

[0103] The connection between the inlet opening 31e and the front end face 31c does not need to be a right angle when viewed from a direction parallel to the axis 31L, and at least a portion of the connection may have a chamfer and / or an R.

[0104] The shape of the fiber guide path 31a connected to the inlet opening 31e is not particularly limited. The fiber guiding surface of the fiber guide path 31a may include any one or more of the following: a flat surface, at least one twisted surface, and a curved portion.

[0105] In the above embodiment, the drafting device 6 is described as an example, comprising a rear roller pair 14, a third roller pair 15, an intermediate roller pair 16, and a front roller pair 17. However, it is also possible to have more than one roller pair upstream of the rear roller pair 14. Furthermore, the front roller pair (the roller pair positioned closest to the air-jet spinning device 7 in the transport path of the fiber bundle F) may also be part of another device. For example, the spinning unit 2 may include a supply device that supplies the fiber bundle F drafted by the drafting device 6 to the air-jet spinning device 7, and the front roller pair 17 may be included as part of the supply device. The front roller pair 17 may be included in the drafting device 6 that drafts the fiber bundle S, or in the supply device that supplies the fiber bundle F to the air-jet spinning device 7, or it may be provided separately without being included in other devices.

[0106] The air-jet spinning device 7 can also be omitted so that it can rotate around the rotating shaft 43 as a fulcrum.

[0107] In spinning unit 2, the yarn retention device 11 has the function of drawing yarn Y from the air-jet spinning device 7, but the yarn Y can also be drawn from the air-jet spinning device 7 by the guide roller and the clamping roller. In the case where the yarn Y is drawn from the air-jet spinning device 7 by the guide roller and the clamping roller, the yarn retention device 11 can be replaced, or a loose tube or a mechanical compensator that utilizes the suction airflow can be installed on the basis of the yarn retention device 11.

[0108] In the spinning unit 2, instead of the structure in which the two yarn ends are connected by the yarn splicing device 26, the yarn Y from the air-jet spinning device 7 can be connected (jointed) to the yarn Y from the package P by inserting the yarn Y from the package P into the air-jet spinning device 7 and starting the drafting action of the drafting device 6 and the spinning action of the air-jet spinning device 7.

[0109] In the spinning machine 1, each device is arranged in the height direction of the machine so that the yarn Y supplied from the upper side is wound on the lower side. However, each device may also be arranged so that the yarn supplied from the lower side is wound on the upper side.

[0110] In the spinning machine 1, at least one lower roller and traverse guide 23 of the drafting device 6 are driven by power from the second end frame 5 (i.e., shared by multiple spinning units 2). However, it is also possible to drive each part of the spinning unit 2 (e.g., drafting device, spinning device, winding device, etc.) independently for each spinning unit 2.

[0111] In the direction of yarn Y's travel, the tension sensor 9 can also be configured upstream of the yarn monitoring device 8. The unit controller 10 can also be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 can also be omitted. If the yarn Y is not waxed, the waxing device 12 can be retained, and the wax can simply be removed from the waxing device 12.

[0112] exist Figure 1 The diagram shows a spinning machine 1 winding a cylindrical package P, but it can also wind a conical package. In the case of a conical package, slack in the yarn Y occurs due to the traverse movement of the yarn Y, but this slack can be absorbed by the yarn retention device 11. The materials and shapes of each structure are not limited to those described above; a wide variety of materials and shapes can be used.

Claims

1. A spinning machine, characterized in that, have: A drafting device having a front roller pair for drafting fiber bundles; and An air-jet spinning device that generates yarn by applying a swirling airflow to the fiber bundle drawn by the drafting device. The air-jet spinning device has a fiber guide comprising a front end face facing the clamping thread of the front roller pair and an inlet opening formed on the front end face. In the fiber guide, when respectively defined as The line segment (E) that is defined as the width of the longest part of the entrance opening. A straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E). The first inclined line (BL) is obtained by tilting the straight line (A) at +45 degrees along the front end face with the center point (H) as the center. The second inclined line (CL) is obtained by tilting the straight line (A) at a -45 degree angle along the front end face with the center point (H) as the center. The first intersection point (B) of the intersection of the entrance opening and the first inclined line (BL) closest to the center point (H), The second intersection point (C) of the intersection of the entrance opening and the second inclined line (CL) closest to the center point (H), and When the straight line (D) passes through the first intersection point (B) and the second intersection point (C), The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more but less than +80 degrees, or inclined at -10 degrees or less but more than -80 degrees, relative to the clamping line.

2. A spinning machine, characterized in that, have: A drafting device having a front roller pair for drafting fiber bundles; and An air-jet spinning device that generates yarn by applying a swirling airflow to the fiber bundle drawn by the drafting device. The air-jet spinning device has a fiber guide and a spinning chamber. The fiber guide includes a front end face facing the clamping line of the front roller pair and an inlet opening formed on the front end face. The spinning chamber is formed inside the air-jet spinning device and has a centerline. In the fiber guide, when respectively defined as The line segment (E) that is defined as the width of the longest part of the entrance opening. A straight line (A) passing through the intersection point (H) of the center line and the front end face and the midpoint of the line segment (E), The first inclined line (BL) is obtained by tilting the straight line (A) at +45 degrees along the front end face with the intersection point (H) as the center. The second inclined line (CL) is obtained by tilting the straight line (A) at a -45 degree angle along the front end face with the intersection point (H) as the center. The first intersection point (B) of the intersection of the entrance opening and the first inclined line (BL) that is closest to the intersection point (H). The second intersection point (C) of the intersection of the entrance opening and the second inclined line (CL) that is closer to the intersection point (H), and When the straight line (D) passes through the first intersection point (B) and the second intersection point (C), The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more but less than +80 degrees, or inclined at -10 degrees or less but more than -80 degrees, relative to the clamping line.

3. The spinning machine according to claim 1, characterized in that, The length (G) from the center point (H) of the front end face to the straight line (D) is more than 0.5 mm and less than 4.0 mm.

4. The spinning machine according to claim 3, characterized in that, The length (G) from the center point (H) of the front end face to the straight line (D) is more than 0.5 mm and less than 2.5 mm.

5. The spinning machine according to claim 2, characterized in that, The length (G) from the intersection point (H) of the center line and the front end face to the straight line (D) is more than 0.5 mm and less than 4.0 mm.

6. The spinning machine according to claim 5, characterized in that, The length (G) from the intersection point (H) of the center line and the front end face to the straight line (D) is more than 0.5 mm and less than 2.5 mm.

7. The spinning machine according to any one of claims 1 to 6, characterized in that, The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +15 degrees or more but less than +60 degrees, or inclined at -15 degrees or less but more than -60 degrees, relative to the clamping line.

8. The spinning machine according to any one of claims 1 to 6, characterized in that, The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +20 degrees or more but less than +50 degrees, or inclined at -20 degrees or less but more than -50 degrees, relative to the clamping line.

9. The spinning machine according to any one of claims 1 to 8, characterized in that, The straight line (D) is inclined in the opposite direction to the swirling airflow.

10. The spinning machine according to any one of claims 1 to 9, characterized in that, In the inlet opening of the fiber guide, The length of the line segment (E) is between 2 mm and 14 mm. The maximum height (Z) is between 0.3mm and 6mm.

11. The spinning machine according to claim 10, characterized in that, In the inlet opening of the fiber guide, The length of the line segment (E) is between 4 mm and 10 mm. The maximum height (Z) is between 0.5 mm and 4 mm.

12. The spinning machine according to any one of claims 1 to 11, characterized in that, The fiber guide includes an outlet opening formed on the rear end face, the outlet opening having a straight bottom edge. The bottom edge of the outlet opening is inclined relative to the straight line (D) of the inlet opening.

13. The spinning machine according to claim 12, characterized in that, When viewed from the axial direction of the fiber guide, the imaginary extension of the bottom edge of the outlet opening intersects the reference line (D) of the inlet opening.

14. A fiber guide suitable for an air-jet spinning apparatus, characterized in that it comprises: Front end; An inlet opening is formed on the front end face; and The chamfered portion formed on the front end face, At least a portion of the boundary between the front end face and the chamfered portion forms a chamfered straight line. When each is defined The line segment (E) that is defined as the width of the longest part of the entrance opening. A straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E). The first inclined line (BL) is obtained by tilting the straight line (A) at +45 degrees along the front end face with the center point (H) of the front end face as the center. The second inclined line (CL) is obtained by tilting the straight line (A) at a -45 degree angle along the front end face with the center point (H) of the front end face as the center. The first intersection point (B) of the intersection of the front end face and the first inclined line (BL) that is closest to the center point (H). The second intersection point (C) of the intersection of the front end face and the second inclined line (CL) that is closer to the center point (H), and When the straight line (D) passes through the first intersection point (B) and the second intersection point (C), The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the chamfered line is inclined at +10 degrees or more and +80 degrees or less relative to the line (D) or inclined at -10 degrees or less and -80 degrees or more.

15. The fiber guide according to claim 14, characterized in that, The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the chamfered straight line is inclined at +15 degrees or more and +60 degrees or less relative to the straight line (D) or inclined at -15 degrees or less and -60 degrees or more.

16. The fiber guide according to claim 14, characterized in that, The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the chamfered line is inclined at +20 degrees or more and +50 degrees or less relative to the line (D) or inclined at -20 degrees or less and -50 degrees or more.

17. The fiber guide according to any one of claims 14 to 16, characterized in that, The chamfered straight line is formed from the first periphery of the front end face to the second periphery of the front end face.

18. The fiber guide according to any one of claims 14 to 17, characterized in that, The front end face has the chamfered portion and the second chamfered portion. The chamfer line corresponding to at least a portion of the boundary of the front end face and the chamfered portion, and the second chamfer line corresponding to at least a portion of the boundary of the front end face and the second chamfered portion, are parallel to each other.

19. The fiber guide according to any one of claims 14 to 17, characterized in that, The front end face has the chamfered portion and the third chamfered portion. The chamfer line corresponding to at least a portion of the boundary of the front end face and the chamfered portion, and the third chamfer line corresponding to at least a portion of the boundary of the front end face and the third chamfered portion, are connected at a junction point located in the surface of the front end face other than the periphery.

20. The fiber guide according to claim 19, characterized in that, One of the chamfered lines and the third chamfered line is arranged parallel to the line (D).

21. The fiber guide according to any one of claims 14 to 20, characterized in that, In the inlet opening, The length of the line segment (E) is between 2 mm and 14 mm. The maximum height (Z) is between 0.3mm and 6mm.

22. The fiber guide according to claim 21, characterized in that, In the inlet opening, The length of the line segment (E) is between 4 mm and 10 mm. The maximum height (Z) is between 0.5 mm and 4 mm.

23. The fiber guide according to any one of claims 14 to 22, characterized in that, The length (G) from the center point (H) of the front end face to the straight line (D) is more than 0.5 mm and less than 4.0 mm.

24. The fiber guide according to claim 23, characterized in that, The length (G) from the center point (H) of the front end face to the straight line (D) is more than 0.5 mm and less than 2.5 mm.

25. The fiber guide according to any one of claims 14 to 24, characterized in that, It has an outlet opening formed on a rear end face opposite to the front end face, the outlet opening having a straight bottom edge. The bottom edge of the outlet opening is inclined relative to the straight line (D) of the inlet opening.

26. An air-jet spinning device, characterized in that, have: A fiber guide having a front end face with an inlet opening; and A support block that supports the fiber guide and can be detachably mounted relative to the main body. The support block has a reference surface that faces the main body. In the fiber guide, when respectively defined as The line segment (E) that is defined as the width of the longest part of the entrance opening. A straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E). The first inclined line (BL) is obtained by tilting the straight line (A) at +45 degrees along the front end face with the center point (H) as the center. The second inclined line (CL) is obtained by tilting the straight line (A) at a -45 degree angle along the front end face with the center point (H) as the center. The first intersection point (B) of the intersection of the entrance opening and the first inclined line (BL) closest to the center point (H), The second intersection point (C) of the intersection of the entrance opening and the second inclined line (CL) closest to the center point (H), and When the straight line (D) passes through the first intersection point (B) and the second intersection point (C), The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more and +80 degrees or less, or inclined at -10 degrees or less and -80 degrees or more, relative to the reference plane of the support block.

27. An air-jet spinning device, characterized in that, have: A fiber guide having a front end face with an inlet opening; Support block supporting the fiber guide; and A rotating shaft that supports the support block in a rotatable manner. In the fiber guide, when respectively defined as The line segment (E) that is defined as the width of the longest part of the entrance opening. A straight line (A) passing through the center point (H) of the front end face and the midpoint of the line segment (E). The first inclined line (BL) is obtained by tilting the straight line (A) at +45 degrees along the front end face with the center point (H) as the center. The second inclined line (CL) is obtained by tilting the straight line (A) at a -45 degree angle along the front end face with the center point (H) as the center. The first intersection point (B) of the intersection of the entrance opening and the first inclined line (BL) closest to the center point (H), The second intersection point (C) of the intersection of the entrance opening and the second inclined line (CL) closest to the center point (H), and When the straight line (D) passes through the first intersection point (B) and the second intersection point (C), The fiber guide is configured such that, when viewed from the axial direction of the fiber guide, the straight line (D) is inclined at +10 degrees or more and +80 degrees or less, or inclined at -10 degrees or less and -80 degrees or more, relative to the axis of rotation of the rotation axis.

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