Yarn end untwisting tube, yarn joining device, and yarn winding machine

Abstract

Provided is a yarn end untwisting tube, a yarn joining device, and a yarn winding machine. A first yarn end untwisting tube (40A) includes a tube main body (41) having a hollow shape extending in an axial direction (D1). An injection hole (43) is formed in a peripheral wall (42) of the tube main body (41). A first opening portion (45) serving as an inlet of the injection hole (43) is formed on an outer surface of the peripheral wall (42), and a second opening portion (46) serving as an outlet of the injection hole (43) is formed on an inner surface of the peripheral wall (42). The second opening portion (46) is located closer to a second end (41b) than the first opening portion (45). The first opening portion (45) is an elongated hole extending in a width direction (D3) orthogonal to the axial direction (D1).

Description

Technical Field

[0001] This invention relates to a yarn end untwisting tube, a yarn splicing device, and a yarn winding machine. Background Technology

[0002] Previously, a yarn end untwisting device having a yarn end untwisting tube was known. The yarn end untwisting device is provided in a yarn splicing device to untwise the yarn end. For example, in the device described in Japanese Patent Application Publication No. 58-144063 (Patent Document 1), an ejection hole is provided on the peripheral wall of the yarn end untwisting tube, and this ejection hole has a gas ejection direction toward the inside of the tube. The ejection hole is an elongated opening intersecting the axial direction of the tube. The yarn end untwisting tube is fitted into a nozzle hole in a block. An air guide hole extending along the axial direction of the nozzle hole is formed in the block. In the yarn splicing device, the air guide hole and the ejection hole are arranged opposite each other.

[0003] Patent Document 1 describes a specific example of a jet orifice: an elongated, narrow opening with two parallel sides, inclined relative to the axis of the tube. In this case, by rotating the yarn-end untwisting tube within the nozzle orifice, the position of the pressurized air jet changes along the axis of the tube. Alternatively, Patent Document 1 describes a jet orifice that is a wedge-shaped, elongated opening with two non-parallel sides, intersecting the axis of the tube. In this case, by rotating the yarn-end untwisting tube within the nozzle orifice, the amount of pressurized air jetted changes. Summary of the Invention

[0004] In yarn end untwisting tubes, the yarn end is untwisted by the suction effect generated by air jetting. In conventional yarn end untwisting tubes, assuming a constant area for the air jetting orifice, increasing the airflow requires increasing the air pressure supplied to the tube. This increase in air pressure is undesirable from both an air consumption and energy consumption perspective.

[0005] The purpose of this invention is to provide a yarn end untwisting tube, a yarn splicing device, and a yarn winding machine that can ensure the required airflow for untwisting without increasing the pressure of the supplied air.

[0006] One aspect of the present invention is a yarn end untwisting tube, comprising a hollow tube body extending in the axial direction. In this yarn end untwisting tube, the tube body has a first end in the axial direction and a second end opposite to the first end. The first end and the second end are both open ends. A jet hole penetrating the peripheral wall is formed on the peripheral wall of the tube body. A first opening portion serving as the inlet of the jet hole is formed on the outer surface of the peripheral wall. A second opening portion serving as the outlet of the jet hole is formed on the inner surface of the peripheral wall. At least a portion of the second opening portion is located closer to the second end than the first opening portion. When viewed from the centerline direction of the jet hole, the first opening portion and the second opening portion are elongated holes extending in the width direction orthogonal to the axial direction.

[0007] According to this yarn end untwisting tube, the first opening, which serves as the inlet of the jet orifice, is an elongated hole extending in the width direction orthogonal to the axial direction of the tube body. This structure allows for a larger flow rate of air in the axial direction compared to a structure where the opening of the jet orifice extends longer in the axial direction. This enables the untwisting of the yarn end. The required airflow for untwisting the yarn end is ensured, while eliminating the need to increase the pressure of the air supplied to the yarn end untwisting tube. This structure offers superior results from both the perspective of air consumption and energy consumption.

[0008] Alternatively, the two ends of the elongated hole in the width direction are outward-expanding arcs. This structure allows air to flow smoothly into the interior of the untwisting tube at the yarn end.

[0009] Alternatively, the edge of the first end of the second opening may be located on the first end side compared to the edge of the second end of the first opening. This structure facilitates airflow toward the second end in the axial direction.

[0010] Alternatively, when viewed from a direction perpendicular to the axis of the tube body and passing through the center of the first opening, at least a portion of the second opening overlaps with at least a portion of the first opening, and the area of ​​the overlapping region is less than half the area of ​​the first opening. This structure facilitates airflow towards the second end in the axial direction.

[0011] Alternatively, when the first opening is divided equally by a plane containing the center of the first opening and the axis of the tube body, each part is symmetrical with respect to the plane. According to this structure, the flow of air from the first opening into the injection hole is less likely to swirl.

[0012] Alternatively, when the second opening is divided equally by a plane containing the center of the second opening and the axis of the tube body, each part is symmetrical with respect to the plane. According to this structure, the airflow into the tube body from the second opening is unlikely to swirl. Because the airflow is unlikely to swirl, the yarn end inserted into the tube body from the first end is unlikely to swirl within the tube body.

[0013] In particular, if the first opening and the second opening have symmetrical shapes, the air flowing into the tube body from the injection hole will have difficulty swirling in the specified direction within the tube body. Therefore, the air flowing in from the first opening can flow stably within the tube body, enabling efficient untwisting of the yarn ends.

[0014] Alternatively, the first opening and the second opening can have the same shape. This structure simplifies the manufacturing of the yarn end untwisting tube and the processing of the injection holes.

[0015] Alternatively, the portion of the jet hole located between the first opening and the second opening may have the same shape as both the first and second openings. This structure simplifies the manufacturing of the yarn end untwisting tube and the processing of the jet hole.

[0016] Alternatively, the straight line connecting the center of the first opening and the center of the second opening can be inclined at an angle of 30 to 40 degrees relative to the axial direction. With this structure, air can be injected relative to a position effective for untwisting the yarn end.

[0017] Alternatively, in a cross-section of the tube body including the centerline of the injection hole and the axis of the tube body, the distance from the axis to the inner surface of the inner surface of the tube body closer to the second end than the second opening increases as it approaches the second end. According to this structure, the cross-sectional area of ​​the airflow path can be further increased compared to a structure with a constant inner diameter of the tube body. Therefore, air can flow from the first end towards the second end, drawing the yarn end in from the first end and easily untwisting the drawn-in yarn end.

[0018] Alternatively, the tube body may have a tapered portion, and the distance from the axis to the inner surface of this tapered portion increases as it approaches the second end. According to this structure, the cross-sectional area of ​​the airflow path can be further increased compared to a structure where the inner diameter of the tube body is constant. Therefore, air can flow from the first end towards the second end, drawing the yarn end in from the first end and making it easier to untwist the drawn-in yarn end.

[0019] Alternatively, the cone may be inclined at an angle of 1 to 2 degrees relative to the axial direction. This structure allows for more appropriate fulfillment of the aforementioned function (easy untwisting of the yarn ends).

[0020] Alternatively, the tapered portion can be formed from a position 20mm to 30mm along the axial direction relative to the first end to the second end. This structure allows for a more appropriate fulfillment of the aforementioned function (easy untwisting of the yarn ends).

[0021] Alternatively, the thickness of the peripheral wall at the first end of the tube body can be between 0.7 mm and 2 mm.

[0022] Alternatively, the distance along the axis from the first end to the first opening can be 5.5 mm or more and 7.5 mm or less.

[0023] Alternatively, when viewed from the centerline direction of the injection hole, the first opening has: a first edge extending in the width direction; and a second edge extending in the width direction and parallel to the first edge, located at a first end side compared to the first edge, with the maximum separation distance of the first opening in the width direction being greater than the separation distance between the first edge and the second edge. According to this structure, a larger flow rate of air can be made to flow in the axial direction without increasing the pressure of the air supplied to the yarn end untwisting tube. The injection hole having parallel first and second edges at the first opening, which serves as the inlet, helps reduce manufacturing time.

[0024] Alternatively, the maximum separation distance in the width direction of the first opening can be 1.5 mm to 2.5 mm, and the separation distance between the first edge and the second edge can be 0.7 mm to 1.4 mm. With this structure, the yarn end can be untwisted more reliably.

[0025] As another aspect of the present invention, a yarn splicing device may be provided, comprising: a main frame; a yarn end untwisting tube as described above; and a housing portion having an insertion portion for inserting the yarn end untwisting tube; the yarn end untwisting tube is mounted on the main frame while inserted into the insertion portion of the housing portion. According to this yarn splicing device, the airflow required for untwisting the yarn end can be ensured without increasing the air pressure supplied to the yarn splicing device. As a result, yarn end untwisting can be performed appropriately, and yarn splicing can be performed without obstruction.

[0026] As another aspect of the present invention, a yarn winding machine may be provided, comprising: a yarn tube support portion for supporting a yarn feed tube; a winding device for winding yarn unwound from the yarn feed tube to form a package; and the aforementioned yarn splicing device for connecting the yarn end of the packaged yarn to the yarn end of the yarn feed tube. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a winding unit having one embodiment of a yarn splicing device.

[0028] Figure 2 yes Figure 1 Front view of the yarn splicing device.

[0029] Figure 3 It is along Figure 2 A cross-sectional view along line III-III.

[0030] Figure 4 It is a three-dimensional view of the box containing the yarn end untwisting tube.

[0031] Figure 5 It is in the state where the injection nozzle is facing upwards. Figure 4 A top view of the untwisting tube at the yarn end.

[0032] Figure 6 yes Figure 5 A three-dimensional diagram of a tube used for untwisting the yarn end.

[0033] Figure 7 It is Figure 5 A cross-sectional view of the yarn end untwisting tube cut in half axially.

[0034] Figure 8 It is Figure 5 A three-dimensional view of the yarn end untwisting tube cut in half axially.

[0035] Figure 9 This is a diagram showing the yarn end untwisting tube as viewed from the centerline direction of the jet orifice. Detailed Implementation

[0036] Hereinafter, one embodiment will be described with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used to label the same elements and repeated descriptions are omitted. The scale of the drawings may not be the same as the scale of the description.

[0037] First, refer to Figure 1 The overall structure of the winding unit 1 equipped with the yarn splicing device 10 of this embodiment will be described. It should be noted that in this specification, "upstream" and "downstream" refer to the upstream and downstream directions of the yarn travel during yarn winding.

[0038] The winding unit 1 winds yarn Y from the yarn feed tube B onto the package P. The yarn feed tube B is formed by the previous spinning machine and is transported from the spinning machine, for example, in a tray-like state. When the winding unit 1 is equipped with a yarn magazine, the operator places the yarn feed tube B into the yarn magazine, and the yarn feed tube B is supplied from the yarn magazine to the yarn tube support 2 (described later). Furthermore, by arranging multiple winding units 1 side by side, an automatic winding machine as a fiber machinery is constituted.

[0039] In the winding unit 1, along the travel path of the yarn Y, starting from the upstream side (in this case, the downstream side), are arranged the following components in sequence: yarn tube support 2, yarn unwinding auxiliary device 3, pre-cleaner 4, tension application device 5, tension sensor 6, lower yarn capturing device 7, yarn splicing device 10, cutter 9, yarn monitoring device 11, upper yarn capturing device 12, and winding device 13. These structures are mounted on the unit body 8.

[0040] The yarn tube support 2 supports the yarn feeding tube B in an upright position, allowing the yarn Y to be supplied. The yarn unwinding auxiliary device 3 controls the air loop of the yarn Y unwinding from the yarn feeding tube B through a cylindrical component positioned above the yarn layer of the yarn feeding tube B.

[0041] The tension applying device 5 is a gate-type tension applying component. It applies a predetermined tension to the traveling yarn Y by guiding the yarn Y into a sawtooth shape using a pair of gates consisting of a fixed gate and a movable gate with comb-like teeth. Alternatively, the tension applying device 5 can be replaced by a disc-type tension applying component. The tension sensor 6 measures the tension of the yarn Y applied by the tension applying device 5.

[0042] The pre-cleaner 4 restricts the passage of yarn defects, such as tangled yarn, that are larger than a specified value by using a pair of limiting members arranged at predetermined intervals along the travel path of the yarn Y. The yarn monitoring device 11 detects yarn defects such as knots during the winding process of the yarn Y. The cutter 9 cuts the yarn Y if a yarn defect is detected by the yarn monitoring device 11. The yarn splicing device 10, for example, connects the yarn end of the yarn Y on the P side of the package to the yarn end of the yarn Y on the B side of the feed tube after the yarn Y has been cut by the cutter 9 or after a yarn breakage has occurred.

[0043] The lower yarn capturing device 7 is mounted on the unit body 8 in a manner that allows it to rotate around the axis α. A suction port 7a is provided at the rotating end of the lower yarn capturing device 7. The suction port 7a rotates between a position above the yarn splicing device 10 and a position below the pre-yarn clearer 4. The lower yarn capturing device 7 is in standby mode when the suction port 7a is positioned below the pre-yarn clearer 4. For example, after yarn Y is cut by the cutter 9 or after a breakage of yarn Y occurs, the lower yarn capturing device 7 draws the yarn end of yarn Y from the side of the yarn feed tube B through the suction port 7a. Then, the suction port 7a is rotated to a position above the yarn splicing device 10 to deliver yarn Y from the side of the yarn feed tube B to the yarn splicing device 10.

[0044] The upper yarn capturing device 12 is mounted on the unit body 8 in a manner that allows it to rotate around the axis β. A suction port 12a is provided at the rotating end of the upper yarn capturing device 12. The suction port 12a rotates between the winding device 13 and the yarn splicing device 10 at a position lower than the yarn splicing device 10. For example, after the yarn Y is cut by the cutter 9 or after a breakage of the yarn Y, the upper yarn capturing device 12 rotates the suction port 12a to the winding device 13 side to attract the yarn end of the yarn Y on the p-side of the package. Then, the suction port 12a rotates to a position lower than the yarn splicing device 10 to deliver the yarn Y on the p-side of the package to the yarn splicing device 10.

[0045] The winding device 13 winds the yarn Y, which has been unwound from the yarn feed tube B, onto a package P to form a fully wound package P. The winding device 13 has a winding drum 14 with a drum groove 14a and a rocker arm 15 that supports the package P in a rotatable manner. The rocker arm 15 makes the surface of the package P contact the surface of the winding drum 14 with appropriate contact pressure. The winding device 13 drives the winding drum 14 to rotate by a motor and causes the package P to rotate passively, thereby winding the yarn Y into the package P while causing the yarn Y to traverse at a predetermined amplitude.

[0046] The main body 8 is equipped with a control unit 16, an input unit 17, and a display unit 18. The control unit 16 controls each structure of the winding unit 1. The input unit 17 includes, for example, operation buttons, which are used by the operator to set various values ​​for the control unit 16. The display unit 18 displays the operating status of the winding unit 1. Furthermore, the control unit 16 sends and receives various information related to the winding operation with the upper control unit of the automatic winding machine. The upper control unit manages the control units 16 of each winding unit 1 and controls the entire automatic winding machine.

[0047] Next, the structure of the yarn splicing device 10 will be described. Furthermore, for convenience, in the following description, the packaged P side will be referred to as the upper side, the yarn feed tube B side as the lower side, and the side along the yarn Y's travel path relative to the yarn splicing device 10 will be referred to as the front side and its opposite side as the rear side. Additionally, the yarn Y on the packaged P side will be referred to as the upper yarn YA, and the yarn Y on the yarn feed tube B side will be referred to as the lower yarn YB.

[0048] like Figure 2 As shown, the yarn splicing device 10 includes a first yarn end untwisting tube 40A and a second yarn end untwisting tube 40B, a yarn splicing part 50, a pair of yarn gathering rods 81, and a pair of anti-twisting rods 82. The pair of yarn gathering rods 81 rotate relative to the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B. The pair of anti-twisting rods 82 rotate relative to the yarn splicing part 50. The yarn splicing device 10 is mounted on the unit body 8 via the main body frame 20 that supports each structure.

[0049] A first guide plate 21 is positioned above the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B. A second guide plate 22 is positioned below the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B. The first guide plate 21 and the second guide plate 22 are arranged opposite each other in the vertical direction, separated by the yarn receiving portion 50. The first guide plate 21 has guide grooves 21a and 21b. The second guide plate 22 has guide grooves 22a and 22b. In the vertical direction, the guide groove 21a of the first guide plate 21 is opposite to the guide groove 22a of the second guide plate 22. In the vertical direction, the guide groove 21b of the first guide plate 21 is opposite to the guide groove 22b of the second guide plate 22.

[0050] The upper yarn YA, guided by the upper yarn capturing device 12 and gathered by the yarn gathering rod 81, is introduced into guide grooves 21a and 22a. The lower yarn YB, guided by the lower yarn capturing device 7 and gathered by the yarn gathering rod 81, is introduced into guide grooves 21b and 22b.

[0051] An upper yarn holding portion 60A is provided above the first guide plate 21, and a lower yarn cutting portion 70A is provided below the first guide plate 21. A lower yarn holding portion 60B is provided below the second guide plate 22, and an upper yarn cutting portion 70B is provided above the second guide plate 22. The upper yarn holding portion 60A holds the upper yarn YA that has been guided into the guide groove 21a. The upper yarn cutting portion 70B cuts the upper yarn YA that has been guided into the guide groove 22a while it is held by the upper yarn holding portion 60A. The lower yarn holding portion 60B holds the lower yarn YB that has been guided into the guide groove 22b. The lower yarn cutting portion 70A cuts the lower yarn YB that has been guided into the guide groove 21b while it is held by the lower yarn holding portion 60B.

[0052] Air is injected from the injection hole 43 (described later) formed in the first yarn end untwisting tube 40A. With the upper yarn YA held by the upper yarn holding part 60A, the yarn end of the upper yarn YA, after being cut by the upper yarn cutting part 70B, is taken into the first yarn end untwisting tube 40A and untwisted. Similarly, air is injected from the injection hole 43 (described later) formed in the second yarn end untwisting tube 40B. With the lower yarn YB held by the lower yarn holding part 60B, the yarn end of the lower yarn YB, after being cut by the lower yarn cutting part 70A, is taken into the second yarn end untwisting tube 40B and untwisted.

[0053] The yarn splicing section 50 connects the yarn ends of the upper yarn YA (untwisted in the first yarn end untwisting tube 40A) and the lower yarn YB (untwisted in the second yarn end untwisting tube 40B) by twisting the yarn end of the upper yarn YA with the yarn end of the lower yarn YB. When the yarn ends are twisted together in the yarn splicing section 50, the upper yarn YA is held by the upper yarn holding section 60A, and the lower yarn YB is held by the lower yarn holding section 60B. By rotating the yarn gathering rod 81, the yarn end of the upper yarn YA is led out from the first yarn end untwisting tube 40A, and the yarn end of the lower yarn YB is led out from the second yarn end untwisting tube 40B. Furthermore, the leading ends of the yarn ends of the upper yarn YA and the lower yarn YB are positioned near the yarn splicing section 50 by means of the anti-twisting rod 82.

[0054] Next, use Figures 2-4 The structures of the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B are described in detail. The structures of the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B are identical. However, when the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B are inserted into the box portion 57, the injection hole 43 of the first yarn end untwisting tube 40A faces downwards, and the injection hole 43 of the second yarn end untwisting tube 40B faces upwards. Hereinafter, only the first yarn end untwisting tube 40A will be described, omitting descriptions of repeated and common parts.

[0055] like Figure 2 As shown, the first yarn end untwisting tube 40A is installed on the main frame 20 via the box part 57 and the bushing 58. Figure 3 As shown, the yarn guide portions 48 of the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B are arranged facing the front side of the yarn splicing device 10, i.e., the side that attracts the yarn end. Specifically, the tube body 41 of the first yarn end untwisting tube 40A is installed on the main frame 20 in a state where it is inserted into the inner insertion portion 57a ​​of the box portion 57 and the inner insertion portion 58a of the bushing 58. A gap is formed between the inner peripheral surface of the inner insertion portion 59a of the box mounting portion 59 and the outer peripheral surface of the first yarn end untwisting tube 40A. This gap is formed to be larger than the gap between the inner peripheral surface of the inner insertion portion 57a ​​of the box portion 57 and the outer peripheral surface of the first yarn end untwisting tube 40A. More specifically, this gap is formed such that the inner peripheral surface of the inner insertion portion 59a of the box mounting portion 59 does not contact the outer peripheral surface of the first yarn end untwisting tube 40A.

[0056] A threaded hole 57b is formed on the side of the housing portion 57. The first yarn end untwisting tube 40A is fixed to the housing portion 57 by inserting a rubber plug 57f and a screw 57e through the threaded hole 57b. Additionally, an air hole 58b is provided in the bushing 58 for introducing untwisting air into the first yarn end untwisting tube 40A. The rubber plug 57f prevents the tube body 41 from breaking when the ceramic tube body 41 is tightened with the screw 57e.

[0057] In order to install the first yarn end untwisting tube 40A on the main frame 20, the first yarn end untwisting tube 40A is inserted into the box part 57 where the bushing 58 is fixed, and the first yarn end untwisting tube 40A, which is integrated with the box part 57, is installed from the front of the winding unit 1 onto the box mounting part 59.

[0058] Reference Figure 3 and Figures 5-9 To explain in more detail the untwisting tube 40A at the first yarn end. For example... Figure 3 , Figure 5 and Figure 7 As shown, the first yarn end untwisting tube 40A is formed, for example, from a hollow tube body 41 made of ceramic. The tube body 41 is, for example, cylindrical in shape and has an axis L1. The tube body 41 extends straight in the direction of the axis L1, i.e., the axial direction D1.

[0059] The total length of the tube body 41 in the axial direction D1 is, for example, more than 20 mm and less than 80 mm.

[0060] The diameter (outer diameter) of the tube body 41 is, for example, 5 mm or more and 9 mm or less. The tube body 41 may, for example, have a constant outer diameter throughout the axial direction D1. Alternatively, the tube body 41 may not have a constant outer diameter throughout the axial direction D1. The tube body 41 may also have a different outer diameter in a portion of the axial direction D1, without interfering with other components.

[0061] The inner diameter of the tube body 41 is, for example, 3mm or more and 7mm or less.

[0062] The tube body 41 has a peripheral wall 42. The thickness of the peripheral wall 42 is constant for most of the tube body 41 in the axial direction D1 (except for the tapered portion 47 described later).

[0063] The material of the tube body 41 is not particularly limited. The tube body 41 can also be formed of resin or metal, or it can be formed of a material with low wear and static charge.

[0064] like Figures 6-8 As shown, the tube body 41 has a structure for taking in the yarn YA (YB) to be untwisted (see reference). Figure 2The tube body 41 includes a yarn inlet 48; an injection hole 43 (untwisting air inlet) for introducing untwisting air from an untwisting air source (not shown); and an untwisting air outlet 49 for discharging the untwisting air. An untwisting air flow path 44 is formed inside the tube body 41 for the flow of untwisting air to untwist the twisted ends of the yarn. The injection hole 43 communicates with the aforementioned air hole 58b (see reference). Figure 3 ).

[0065] like Figure 7 As shown, the tube body 41 has a first end 41a in the axial direction D1 and a second end 41b opposite to the first end 41a. A yarn inlet 48 is formed at the first end 41a, and an untwisting air outlet 49 is formed at the second end 41b.

[0066] The thickness of the peripheral wall 42 at the first end 41a of the tube body 41 is, for example, more than 0.7 mm and less than 2 mm.

[0067] like Figure 6 As shown, a groove-shaped portion 41c is formed near the yarn inlet portion 48 of the tube body 41 for aligning the tube body 41 (first yarn end untwisting tube 40A) with respect to the box portion 57 and the bushing 58. The groove-shaped portion 41c is a straight portion extending along the axial direction D1 to the first end 41a. Therefore, when installing the first yarn end untwisting tube 40A, the position (orientation) of the injection hole 43 in the circumferential direction can be easily confirmed.

[0068] like Figures 5-8 As shown, in the first yarn end untwisting tube 40A, a jetting hole 43 is formed on the peripheral wall 42 of the tube body 41, penetrating the peripheral wall 42. For example... Figure 5 As shown, a first opening 45, which serves as the inlet of the injection hole 43, is formed on the outer surface of the peripheral wall 42, and a second opening 46, which serves as the outlet of the injection hole 43, is formed on the inner surface of the peripheral wall 42. Figure 5 This is a top view of the first yarn end untwisting tube 40A with the injection hole 43 facing upwards. Figure 5 The straight line L4 is perpendicular to the axis L1 (axial direction D1) of the tube body 41 and passes through the center of the first opening 45 (first center P1 described later). Figure 7 The diagram observed from the direction of (reference). In Figure 5 In the middle, for example, a portion of the second opening 46 (the fourth edge 54 described later) can be seen, while the rest of the second opening 46 is hidden (and therefore shown in dashed lines).

[0069] That is, the second opening 46 is located closer to the second end 41b than the first opening 45.

[0070] To explain in more detail, the first opening 45 has: a first edge 51 extending in a width direction D3 orthogonal to the axial direction D1; and a second edge 52 extending in the width direction D3 and parallel to the first edge 51 (see also...). Figure 9 ); and a pair of arc-shaped connecting portions 55 that connect the two ends of the first edge portion 51 and the second edge portion 52 in the width direction D3. The second edge portion 52 is located closer to the first end 41a than the first edge portion 51.

[0071] The second opening 46 has: a third edge 53 extending in a width direction D3 orthogonal to the axial direction D1; and a fourth edge 54 extending in the width direction D3 and parallel to the third edge 53 (see also...). Figure 9 ); and a pair of arc-shaped connecting portions 56 that connect the two ends of the third edge portion 53 and the fourth edge portion 54 in the width direction D3. The fourth edge portion 54 is located closer to the first end 41a than the third edge portion 53.

[0072] The width direction D3 is the direction of the straight line that passes through the pair of connecting portions 55 of the first opening 45 (intersecting with the pair of connecting portions 55).

[0073] The fourth edge 54 of the second opening 46 (the edge on the side of the first end 41a) is located closer to the first end 41a than the first edge 51 of the first opening 45 (the edge on the side of the second end 41b). Therefore, as Figure 5 As shown, the fourth edge 54 of the second opening 46 can be seen. That is, in this embodiment, the fourth edge 54 is located on a straight line L4 (refer to the first center P1 of the first opening 45) that is orthogonal to the axis L1 of the tube body 41. Figure 7 When viewed from the direction of the first opening 45, at least a portion of the second opening 46 overlaps with at least a portion of the first opening 45.

[0074] like Figure 7 As shown, the distance L200 along the axial direction D1 from the first end 41a of the tube body 41 to the first opening 45 is, for example, 5.5 mm or more and 7.5 mm or less. That is, when viewed as a whole of the tube body 41, the first opening 45 is located close to the first end 41a. The position of the second edge 52 is used as the reference position for the distance along the axial direction D1 from the first end 41a to the first opening 45. In addition, the distance L400 along the axial direction D1 from the first end 41a to the fourth edge 54 is, for example, 7 mm or more and 9 mm. The distance L300 along the axial direction D1 from the first end 41a to the third edge 53 is, for example, 8.5 mm or more and 10.5 mm or less.

[0075] Here, refer to Figure 9 The shapes of the first opening 45 and the second opening 46 will be described. For example... Figure 9 As shown, the first edge 51 and the second edge 52 appear to be straight lines. The pair of connecting portions 55 appear to be arc-shaped. Thus, the first opening 45 has a three-dimensional shape. In... Figure 9 In this state, when viewed from the direction of the centerline L2 of the injection hole 43, the first edge 51, which is a curve, is parallel to the second edge 52, which is a curve.

[0076] Furthermore, a first center P1 can be defined for the first opening 45. The first center P1 can be considered as the center of gravity within the closed region formed by the first opening 45. When the first opening 45 is divided equally by a plane containing the first center P1 of the first opening 45 and the axis L1 of the tube body 41, each part is symmetrical with respect to that plane. In other words, when the first opening 45 is divided equally by a plane containing the first center P1 and extending radially along the tube body 41, each part is symmetrical with respect to that plane.

[0077] In addition, although Figure 9 The first opening 45 is hidden and not shown, but the second opening 46 has the same shape as the first opening 45. The second opening 46, like the first opening 45, has a three-dimensional shape. A second center P2 (see reference) can also be defined for the second opening 46. Figure 7 The second center P2 can be considered the center of gravity within the closed region formed by the second opening 46. When the second opening 46 is divided equally by a plane containing the second center P2 and the axis L1 of the tube body 41, each part is symmetrical with respect to that plane. In other words, when the second opening 46 is divided equally by a plane containing the second center P2 and extending radially along the tube body 41, each part is symmetrical with respect to that plane.

[0078] like Figure 7 As shown, centerline L2 is a straight line connecting the first center P1 of the first opening 45 and the second center P2 of the second opening 46. Centerline L2 intersects the axis L1 of the tube body 41. That is, the centerline L2 of the injection hole 43 and the axis L1 of the tube body 41 are located in the same plane. Figure 9 As shown, the first center P1 is located at the center of the first opening 45 when viewed from the centerline L2. The second center P2 is located at the center of the second opening 46 when viewed from the centerline L2.

[0079] Thus, the first opening 45 is an elongated hole extending in the width direction D3, orthogonal to the axial direction D1. Similarly, the second opening 46 is also an elongated hole extending in the width direction D3, orthogonal to the axial direction D1. The first opening 45 and the second opening 46 are connected by... Figure 9The cylindrical body (tube body 41) with a runway-shaped cross-section (end face) shown is connected by walls of the same shape on its periphery. That is, in the injection hole 43, the shape and size of the cross-section orthogonal to the centerline L2 are constant. Figure 9 In this configuration, the second opening 46 completely overlaps with the first opening 45. Therefore, the second opening 46 is positioned directly opposite the first opening 45 and is hidden from view. The jet hole 43 with this hole shape is formed using a tool such as a drilling machine. Specifically, the drilling machine cutting edge is made to penetrate obliquely relative to the peripheral wall 42, and the drilling machine cutting edge is moved along the width direction D3.

[0080] In the first opening 45, the maximum separation distance W3 in the width direction D3 is greater than the separation distance W1 between the first edge 51 and the second edge 52. For example, the maximum separation distance W3 in the width direction D3 is 1.5 mm to 2.5 mm, and the separation distance W1 between the first edge 51 and the second edge 52 is 0.7 mm to 1.4 mm. In this specification, "elongated hole extending in the width direction" refers to a through hole (hole portion) whose length in the width direction D3 (the maximum separation distance W3 in this embodiment) is greater than its length in the axial direction D1 (the separation distance W1 in this embodiment).

[0081] like Figure 7 As shown, the center line L2 connecting the first center P1 of the first opening 45 and the second center P2 of the second opening 46 is inclined at an angle θ1 relative to the axial direction D1 (axis L1) of the tube body 41. The angle θ1 is, for example, more than 30 degrees and less than 40 degrees.

[0082] The inner surface shape of the injection hole 43 is consistent with the circumferential surface of the columnar body, therefore the wall surface 43a connecting the second edge 52 and the fourth edge 54 (see reference) Figure 8 ), and the wall surface 43b connecting the first edge 51 and the third edge 53 (see reference) Figure 8 The second edge 52 is also inclined at the same angle θ1 relative to the axial direction D1 (axis L1) of the tube body 41. This inclination angle is more than 30 degrees and less than 40 degrees. Furthermore, the wall surface 43a connecting the second edge 52 and the fourth edge 54 can also be inclined at an angle smaller than the inclination angle θ1 of the centerline L2 of the injection hole 43 relative to the axial direction D1 of the tube body 41. According to this structure, the airflow received by the wall surface 43a is further increased.

[0083] return Figure 5As described above, when viewed from the direction of line L4, the second opening 46 partially overlaps with the first opening 45. The area S of the overlapping region is, for example, less than half the size (area) of the first opening 45. The "size of the first opening 45" can be the area obtained by projecting the three-dimensional first opening 45 onto a plane containing the axial direction D1 and the width direction D3. Figure 5 (The area shown on the paper). When viewed from the direction of line L4, the area S of the overlapping region between the second opening 46 and the first opening 45 can, for example, be less than one-third or one-fifth of the size of the first opening 45.

[0084] Air injected into the tube body 41 through the injection hole 43, which is formed at an angle as described above, is ejected in a state where it is oriented in the axial direction D1.

[0085] Reference Figure 7 and Figure 8 The shape of the inner surface of the tube body 41 will be described. The tube body 41 has a conical portion 47 as its inner surface shape, for example, a cone shape. The inner surface 41d is defined as the inner surface of the tube body 41 that is downstream of the second opening 46 in the airflow direction, i.e., the side facing the second end 41b. The diameter of the conical portion 47 (the inner diameter from the viewpoint of the peripheral wall 42) increases as it approaches the second end 41b.

[0086] The tapered portion 47 is inclined at an angle θ2 relative to the axial direction D1 (axis L1) of the tube body 41. The angle θ2 is, for example, more than 1 degree and less than 2 degrees. The distance L470 along the axial direction D1 from the first end 41a of the tube body 41 to the beginning end 47a of the tapered portion 47 is, for example, more than 20 mm and less than 30 mm. That is, when viewed as a whole of the tube body 41, the tapered portion 47 is positioned close to the second end 41b. In other words, the tapered portion 47 is formed from a position of more than 20 mm and less than 30 mm along the axial direction D1 with reference to the first end 41a toward the second end 41b.

[0087] According to the first yarn end untwisting tube 40A and the second yarn end untwisting tube 40B of this embodiment, the first opening 45, which serves as the inlet of the jet hole 43, is an elongated hole extending in the width direction D3 orthogonal to the axial direction D1 of the tube body 41. Therefore, compared to the structure where the opening of the jet hole extends longer in the axial direction D1, a larger flow rate of air can be allowed to flow in the axial direction D1.

[0088] More specifically, compared to a structure where the opening of the injection hole extends longer in the axial direction D1, in this embodiment, the wall surface 43a of the injection hole 43 (refer to...) Figure 8The flow rate of the received air increases. For the air ejected from the injection hole 43, one can imagine the air that comes into contact with the wall 43a and the air that flows into the tube body 41 without contacting the wall 43a.

[0089] In the jet orifice 43 of this embodiment, the airflow rate that flows directly into the tube body 41 without contacting the wall surface 43a is relatively small. The airflow rate that contacts the wall surface 43a is relatively large. "Relatively small" or "relatively large" refers to the relationship between the airflow rates when the overall airflow rate is the same for jet orifices of conventional structures and jet orifices 43 of this embodiment, and when the area of ​​the portion corresponding to the wall surface 43a (the inclined bottom surface portion facing the radially outward side of the tube body 41 in the jet orifice 43) is the same. In this embodiment, by allowing a larger flow rate of air to flow in the axial direction D1, the yarn end can be untwisted. The airflow rate required for untwisting the yarn end can be ensured, while on the other hand, it is not necessary to increase the pressure of the air supplied to the yarn splicing device 10. The above structure provides a preferred effect from both the viewpoint of air consumption and energy consumption.

[0090] According to experiments conducted by the inventors of this application, the airflow was increased in the first yarn end untwisting tube 40A using the jet hole 43 of this embodiment while maintaining the suction effect. Even if the pressure of the air supplied to the yarn splicing device 10 is reduced to, for example, 0.3 MPa or more and 0.4 MPa or less (which is lower than the conventional pressure), the same untwisting as in the conventional can be achieved.

[0091] The fourth edge 54 of the second opening 46 is located closer to the first end 41a than the first edge 51 of the first opening 45. This facilitates airflow in the axial direction D1.

[0092] The two ends of the jet hole 43 in the width direction W3 are arc-shaped and extend outwards. This allows air to flow smoothly into the interior of the yarn end untwisting tube 40.

[0093] From line L4 (reference) Figure 7 When viewed from the direction of the second opening 46, at least a portion of the second opening 46 overlaps with at least a portion of the first opening 45, and the area S of the overlapping region is less than half the area of ​​the first opening 45. This allows air to flow more easily toward the second end 29 in the axial direction D1.

[0094] When the first opening 45 is divided equally by a plane containing the first center P1 and the axis L1 of the tube body 41, each part is symmetrical with respect to the plane. As a result, the flow of air flowing from the first opening 45 into the injection hole 43 is unlikely to swirl.

[0095] When the second opening 46 is divided equally by a plane containing the second center P2 and the axis L1 of the tube body 41, each part is symmetrical with respect to the plane. Therefore, the airflow into the tube body 41 from the second opening 46 is unlikely to swirl. Because the airflow is unlikely to swirl, the yarn end inserted into the tube body 41 from the first end 41a is unlikely to swirl within the tube body 41.

[0096] In particular, in this embodiment, the first opening 45 and the second opening 46 have symmetrical shapes, so the air flowing from the injection hole 43 into the tube body 41 is difficult to swirl in a predetermined direction within the tube body 41. Therefore, the air flowing in from the first opening 45 can flow stably within the tube body 41, enabling efficient untwisting of the yarn ends. In other words, it is possible to prevent damage to the flow rate of the air flowing in from the first opening 45.

[0097] The first opening 45 and the second opening 46 have the same shape and size. As a result, the manufacturing and processing of the yarn end untwisting tube 40A are made easier.

[0098] The portion of the jet orifice 43 located between the first opening 45 and the second opening 46 can also have the same shape as the first opening 45 and the second opening 46. This structure simplifies the manufacturing of the yarn end untwisting tube 40A and the processing of the jet orifice 43.

[0099] The centerline L2 of the injection hole 43 is inclined at an angle of 30 degrees to 40 degrees relative to the axial direction D1. This allows air to be injected relative to a position that is effective for untwisting the yarn end.

[0100] Because the tube body 41 has a tapered portion 47, the cross-sectional area of ​​the airflow path can be increased compared to a structure with a constant inner diameter. Therefore, air can flow from the first end 41a to the second end 41b, drawing the yarn end from the first end 41a and easily untwisting the drawn-in yarn end.

[0101] The cone 47 is inclined at an angle of 1 degree to 2 degrees relative to the axial direction D1. This allows the aforementioned function (easy untwisting of the yarn end) to be performed more appropriately.

[0102] The tapered portion 47 is formed from a position of 20 mm to 30 mm along the axial direction D1, with reference to the first end 41a, toward the second end 41b (up to the second end 41b). This allows for a more appropriate fulfillment of the aforementioned function (easy untwisting of the yarn end).

[0103] In the first opening 45, the maximum separation distance W3 is greater than the separation distance W1. With this structure, a larger flow rate of air can flow in the axial direction D1 of the yarn end untwisting tube 40A without increasing the pressure of the air supplied to the yarn splicing device 10. The jet holes 43 with parallel first edges 51 and second edges 52 in the first opening 45, which serves as the inlet, help reduce manufacturing time.

[0104] The maximum separation distance W3 in the width direction D3 of the first opening 45 is 1.5 mm to 2.5 mm, and the separation distance W1 between the first edge 51 and the second edge 52 is 0.7 mm to 1.4 mm. As a result, the yarn end can be untwisted more reliably.

[0105] According to the yarn splicing device 10, the airflow required for untwisting can be ensured without increasing the air pressure supplied to the yarn splicing device 10. As a result, the yarn ends can be properly untwisted, and the yarn splicing operation can be performed without obstruction.

[0106] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the shape of the first opening 45 and / or the second opening 46 may also be different from the centerline L2 (refer to...). Figure 7 When viewed from the direction of ), it is a rectangular shape extending in the width direction D3. The shape of the first opening 45 and / or the second opening 46 can also be seen from the centerline L2 (refer to Figure 7 When viewed from the direction of the ), it is an elliptical shape extending along the width direction D3.

[0107] Alternatively, in the axial direction D1, the fourth edge 54 of the second opening 46 is located closer to the second end 41b than the first edge 51 of the first opening 45. In this case, the second opening 46 is not visible even when viewed from the direction of the straight line L4 (the second opening 46 is completely hidden).

[0108] The angle θ1 in the above-described embodiments can be greater than 40 degrees or less than 30 degrees.

[0109] The size (area) of the second opening 46 can be larger or smaller than the first opening 45. When the second opening 46 is smaller than the first opening 45, manufacturing time can be reduced.

[0110] The yarn end untwisting tube 40 can also be formed from two components: a first tube and a second tube with a diameter larger than the first tube. In this case, a jet hole 43 is formed on the peripheral wall of the first tube.

[0111] The first yarn end untwisting tube 40A or the second yarn end untwisting tube 40B may also have components other than the tube body 41.

[0112] The yarn end untwisting tube and the yarn splicing device equipped with the yarn end untwisting tube disclosed herein can also be applied to other fiber machinery different from automatic winding machines, such as spinning machines (yarn winding machines). In a yarn winding machine with a structure that winds yarn supplied from the upper side to the lower side, the upper yarn and the lower yarn are opposite in the height direction relative to the above embodiment. That is, in the height direction, the upper yarn is located on the lower side and the lower yarn is located on the upper side.

[0113] When the yarn winding machine is equipped with a trolley, the yarn splicing device 10 can be placed on the trolley instead of the structure in which the yarn splicing device 10 is placed in each winding unit 1.

[0114] Instead of using the slot 14a of the winding device 13 to traverse the yarn Y, the winding device 13 may also have a bobbin without slots and a traversing device capable of reciprocating in the width direction of the package. In this case, the bobbin is driven by rotation of a motor, and the package is driven by rotation of a motor directly.

[0115] The winding unit 1 may also include devices other than those described in the above embodiments, such as a waxing device and / or a yarn retention device.

Claims

1. A yarn end untwisting tube, comprising a hollow tube body extending in the axial direction, characterized in that... The tube body has a first end along the axial direction and a second end opposite to the first end. The first end and the second end are both open ends. A jetting hole penetrating the peripheral wall is formed on the peripheral wall of the tube body. A first opening, serving as the inlet of the injection hole, is formed on the outer surface of the peripheral wall, and a second opening, serving as the outlet of the injection hole, is formed on the inner surface of the peripheral wall. At least a portion of the second opening is located closer to the second end than the first opening. When viewed from the centerline direction of the injection hole, the first opening and the second opening are elongated holes extending in a width direction orthogonal to the axial direction. When viewed from the centerline direction of the injection hole The first opening has: The first edge extending in the width direction; and A second edge portion extends in the width direction and is parallel to the first edge portion, and is located on the first end side compared to the first edge portion. The maximum separation distance in the width direction of the first opening is greater than the separation distance between the first edge and the second edge.

2. The yarn end untwisting tube according to claim 1, characterized in that, The two ends of the elongated hole in the width direction are outwardly expanding arcs.

3. The yarn end untwisting tube according to claim 1, characterized in that, The edge of the first end side of the second opening is located on the first end side compared to the edge of the second end side of the first opening.

4. The yarn end untwisting tube according to claim 2, characterized in that, The edge of the first end side of the second opening is located on the first end side compared to the edge of the second end side of the first opening.

5. The yarn end untwisting tube according to claim 1, characterized in that, When viewed from a direction perpendicular to the axis of the tube body and passing through the center of the first opening, at least a portion of the second opening overlaps with at least a portion of the first opening. The area of ​​the overlapping region is less than half the area of ​​the first opening.

6. The yarn end untwisting tube according to claim 2, characterized in that, When viewed from a direction perpendicular to the axis of the tube body and passing through the center of the first opening, at least a portion of the second opening overlaps with at least a portion of the first opening. The area of ​​the overlapping region is less than half the area of ​​the first opening.

7. The yarn end untwisting tube according to claim 3, characterized in that, When viewed from a direction perpendicular to the axis of the tube body and passing through the center of the first opening, at least a portion of the second opening overlaps with at least a portion of the first opening. The area of ​​the overlapping region is less than half the area of ​​the first opening.

8. The yarn end untwisting tube according to claim 4, characterized in that, When viewed from a direction perpendicular to the axis of the tube body and passing through the center of the first opening, at least a portion of the second opening overlaps with at least a portion of the first opening. The area of ​​the overlapping region is less than half the area of ​​the first opening.

9. The yarn end untwisting tube according to any one of claims 1 to 8, characterized in that, When the first opening is divided equally by a plane containing the center of the first opening and the axis of the tube body, each part is symmetrical with respect to the plane.

10. The yarn end untwisting tube according to any one of claims 1 to 8, characterized in that, When the second opening is divided equally by a plane containing the center of the second opening and the axis of the tube body, each part is symmetrical with respect to the plane.

11. The yarn end untwisting tube according to claim 9, characterized in that, When the second opening is divided equally by a plane containing the center of the second opening and the axis of the tube body, each part is symmetrical with respect to the plane.

12. The yarn end untwisting tube according to any one of claims 1 to 8 and 11, characterized in that, The first opening and the second opening have the same shape.

13. The yarn end untwisting tube according to claim 9, characterized in that, The first opening and the second opening have the same shape.

14. The yarn end untwisting tube according to claim 10, characterized in that, The first opening and the second opening have the same shape.

15. The yarn end untwisting tube according to claim 12, characterized in that, The portion of the injection hole located between the first opening and the second opening has the same shape as both the first opening and the second opening.

16. The yarn end untwisting tube according to claim 13, characterized in that, The portion of the injection hole located between the first opening and the second opening has the same shape as both the first opening and the second opening.

17. The yarn end untwisting tube according to claim 14, characterized in that, The portion of the injection hole located between the first opening and the second opening has the same shape as both the first opening and the second opening.

18. The yarn end untwisting tube according to any one of claims 1 to 8, 11, 13 to 17, characterized in that, A straight line passing through the center of the first opening and the center of the second opening is inclined at an angle of more than 30 degrees and less than 40 degrees relative to the axis direction.

19. The yarn end untwisting tube according to claim 9, characterized in that, A straight line passing through the center of the first opening and the center of the second opening is inclined at an angle of more than 30 degrees and less than 40 degrees relative to the axis direction.

20. The yarn end untwisting tube according to claim 10, characterized in that, A straight line passing through the center of the first opening and the center of the second opening is inclined at an angle of more than 30 degrees and less than 40 degrees relative to the axis direction.

21. The yarn end untwisting tube according to claim 12, characterized in that, A straight line passing through the center of the first opening and the center of the second opening is inclined at an angle of more than 30 degrees and less than 40 degrees relative to the axis direction.

22. The yarn end untwisting tube according to any one of claims 1 to 8, 11, 13 to 17, 19 to 21, characterized in that, In a cross-section of the tube body containing the centerline of the injection hole and the axis of the tube body, in the inner surface of the tube body that is closer to the second end than the second opening, the distance of the inner surface from the axis increases as it approaches the second end.

23. The yarn end untwisting tube according to claim 9, characterized in that, In a cross-section of the tube body containing the centerline of the injection hole and the axis of the tube body, in the inner surface of the tube body that is closer to the second end than the second opening, the distance of the inner surface from the axis increases as it approaches the second end.

24. The yarn end untwisting tube according to claim 10, characterized in that, In a cross-section of the tube body containing the centerline of the injection hole and the axis of the tube body, in the inner surface of the tube body that is closer to the second end than the second opening, the distance of the inner surface from the axis increases as it approaches the second end.

25. The yarn end untwisting tube according to claim 12, characterized in that, In a cross-section of the tube body containing the centerline of the injection hole and the axis of the tube body, in the inner surface of the tube body that is closer to the second end than the second opening, the distance of the inner surface from the axis increases as it approaches the second end.

26. The yarn end untwisting tube according to claim 18, characterized in that, In a cross-section of the tube body containing the centerline of the injection hole and the axis of the tube body, in the inner surface of the tube body that is closer to the second end than the second opening, the distance of the inner surface from the axis increases as it approaches the second end.

27. The yarn end untwisting tube according to claim 22, characterized in that, The tube body has a tapered portion, and the distance of the inner surface of the tapered portion from the axis increases as it approaches the second end.

28. The yarn end untwisting tube according to any one of claims 23 to 26, characterized in that, The tube body has a tapered portion, and the distance of the inner surface of the tapered portion from the axis increases as it approaches the second end.

29. The yarn end untwisting tube according to claim 27, characterized in that, The cone is inclined at an angle of more than 1 degree and less than 2 degrees relative to the axis.

30. The yarn end untwisting tube according to claim 28, characterized in that, The cone is inclined at an angle of more than 1 degree and less than 2 degrees relative to the axis.

31. The yarn end untwisting tube according to claim 27, characterized in that, The tapered portion is formed from a position of 20 mm to 30 mm along the axial direction, with the first end as a reference, to the second end.

32. The yarn end untwisting tube according to claim 28, characterized in that, The tapered portion is formed from a position of 20 mm to 30 mm along the axial direction, with the first end as a reference, to the second end.

33. The yarn end untwisting tube according to claim 29, characterized in that, The tapered portion is formed from a position of 20 mm to 30 mm along the axial direction, with the first end as a reference, to the second end.

34. The yarn end untwisting tube according to claim 30, characterized in that, The tapered portion is formed from a position of 20 mm to 30 mm along the axial direction, with the first end as a reference, to the second end.

35. The yarn end untwisting tube according to any one of claims 1 to 8, 11, 13 to 17, 19 to 21, 23 to 27, 29 to 34, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

36. The yarn end untwisting tube according to claim 9, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

37. The yarn end untwisting tube according to claim 10, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

38. The yarn end untwisting tube according to claim 12, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

39. The yarn end untwisting tube according to claim 18, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

40. The yarn end untwisting tube according to claim 22, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

41. The yarn end untwisting tube according to claim 28, characterized in that, The thickness of the peripheral wall at the first end of the tube body is more than 0.7 mm and less than 2 mm.

42. The yarn end untwisting tube according to any one of claims 1 to 8, 11, 13 to 17, 19 to 21, 23 to 27, 29 to 34, 36 to 41, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

43. The yarn end untwisting tube according to claim 9, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

44. The yarn end untwisting tube according to claim 10, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

45. The yarn end untwisting tube according to claim 12, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

46. ​​The yarn end untwisting tube according to claim 18, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

47. The yarn end untwisting tube according to claim 22, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

48. The yarn end untwisting tube according to claim 28, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

49. The yarn end untwisting tube according to claim 35, characterized in that, The distance along the axis from the first end to the first opening is 5.5 mm or more and 7.5 mm or less.

50. The yarn end untwisting tube according to any one of claims 1 to 8, 11, 13 to 17, 19 to 21, 23 to 27, 29 to 34, 36 to 41, 43 to 49, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

51. The yarn end untwisting tube according to claim 9, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

52. The yarn end untwisting tube according to claim 10, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

53. The yarn end untwisting tube according to claim 12, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

54. The yarn end untwisting tube according to claim 18, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

55. The yarn end untwisting tube according to claim 22, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

56. The yarn end untwisting tube according to claim 28, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

57. The yarn end untwisting tube according to claim 35, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

58. The yarn end untwisting tube according to claim 42, characterized in that, The maximum separation distance in the width direction of the first opening is more than 1.5 mm and less than 2.5 mm. The separation distance between the first edge and the second edge is 0.7 mm or more and 1.4 mm or less.

59. A yarn splicing device characterized by, have: Main framework; Yarn end untwisting tube according to any one of claims 1 to 58; and The box section has an insert portion into which the untwisting tube for the yarn end is inserted; The yarn end untwisting tube is installed on the main frame in the state of being inserted into the inner part of the box.

60. A yarn winding machine characterized by, have: Yarn tube support section that supports the yarn feeding tube; A winding device for winding yarn unwound from the yarn feed tube to form a package; and The yarn splicing device according to claim 59 connects the yarn end of the packaged yarn to the yarn end of the yarn in the yarn feeding tube.

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