JP3705154B2 - Yarn splicer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a yarn joining device and a yarn joining method for joining spun yarns. Specifically, yarn ends that have been untwisted by a fluid such as compressed air are overlapped with each other, and fluid such as compressed air is superimposed on the overlapped portion. The present invention relates to a fluid-type yarn joining device and a yarn joining method for performing yarn joining without knots.
[0002]
[Prior art]
The above-mentioned yarn splicing device clamps the upper and lower yarn ends by pulling them together when the slab catcher detects yarn breakage or detects a yarn defect while winding the yarn in a spinning machine or winder. Each thread is led to a separate untwisting nozzle and twisted back to a state suitable for piecing by a compressed fluid, and each yarn end is pulled into the piecing nozzle and pressed together by a yarn holding lever. Yarn splicing is known in JP-A 64-26742. In the untwisting mechanism in such a fluid type yarn splicing device (splicer), a cylindrical pipe (nozzle pipe) having a smooth inner wall surface is used as the untwisting nozzle.
[0003]
[Problems to be solved by the invention]
The known yarn splicing device described above is suitable for splicing spun yarn formed by twisting short fibers having a short fiber length like ordinary cotton yarn. However, when a high-strength yarn of wool (spun yarn) having a fiber length longer than that of cotton is spliced with a known splicing device, the splicing is often not successful. That is, when untwisting by applying compressed air to the yarn end placed in the untwisting nozzle, the yarn end is not completely dispersed like a cotton yarn and a predetermined amount of fibers is not removed. As shown in FIG. 2, a non-untwisted portion a that appears to be caused by not being untwisted (or retwisted) at the tip side of the untwisted portion at the yarn end occurs.
[0004]
In other words, in order from the yarn end, an untwisted state of a short-end tip-side untwisted portion k1, a non-twisted portion a, and a long-root-side untwisted portion k2 is obtained. Accordingly, when the incomplete untwisted yarn ends are overlapped and spliced together, as shown in FIG. 11, the tip-side untwisted portions k1 are arranged on both sides of the seam portion b between the root-side untwisted portions k2. A hairball-like beard portion h, which is thought to be caused by, was formed in a state of protruding sideways from the end of the seam portion b, resulting in an insufficient seam in terms of appearance or yarn strength .
[0005]
An object of the present invention is to provide a yarn splicing that can provide a seam having sufficient strength while preventing the above-mentioned beard portion from being formed even on a spun yarn that is difficult to untwist, such as a strong twisted yarn of wool. It is to provide an apparatus and a yarn splicing method.
[0008]
[Means for Solving the Problems]
  Claim1In the yarn splicing device provided with the untwisting nozzle for untwisting the twist of the introduced yarn end,
  The untwisting nozzle includes a nozzle pipe, a fluid ejection hole that opens in the inner peripheral surface of the nozzle pipe and generates a swirling flow in the nozzle pipe, and a position that is separated from the fluid ejection hole by a predetermined distance downstream in the fluid movement direction. The partition member is provided in a state in which the internal space of the nozzle pipe is substantially partitioned into a plurality of partial spaces.
[0009]
  Claim1According to the configuration, the yarn end is swung by the swirling flow of the compressed air between the ejection hole in the untwisting nozzle and the partition member to be untwisted, and the inner space of the nozzle pipe partitioned by the partition member Since the turbulent flow occurs at the end of the yarn, the turbulent flow gives an impact to the tip end portion of the yarn end portion solved by the swirling flow, or the fiber can be removed by being blown by the shock caused by the collision with the partition member. Become. That is, the part ahead from the non-untwisted part (refer FIG. 10) in the conventional strong twisted yarn can be removed at the time of an untwisting effect | action by the turbulent flow by a division member. Therefore, after the piecing operation in which the ends of the yarn from which the tip has been removed from the non-untwisted portion are overlapped, the beard portions are not left on both sides of the knot, and the piecing can be performed satisfactorily.
[0010]
  Claim2The configuration of, ContractClaim1The partition member described in 1 is configured in a plate-like shape extending downstream from a position spaced a predetermined distance from the ejection hole downstream in the fluid movement direction.
[0011]
  Claim2According to the configuration ofWardSince the drawing member is formed in a plate-like shape that extends downstream in the fluid ejection direction, the collision with the yarn end or the turbulent flow due to the section is prevented while reducing the internal space of the nozzle pipe. It can surely occur.
[0012]
  Claim3Is the center of the jet hole?La contractClaim1The ratio between the distance to the partition member described in the above and the inner diameter of the nozzle pipe in the ejection hole portion is set in a range of 1.5: 1 to 3.5: 1.
[0013]
  Claim3According to the configuration, from the center of the ejection holeWardSince the ratio of the distance to the drawing member and the inner diameter of the nozzle pipe at the ejection hole portion is set in the range of 1.5: 1 to 3.5: 1, the untwisting action of the yarn end by the swirling flow is sufficient While letting, ContractClaim1The effect | action by this structure can be acquired.
[0014]
  Claim4In the yarn splicing device provided with the untwisting nozzle for untwisting the twist of the introduced yarn end,
  The untwisting nozzle has a nozzle pipe and a fluid ejection hole that opens in the inner peripheral surface of the nozzle pipe and generates a swirling flow in the nozzle pipe. The nozzle pipe is downstream from the fluid ejection hole in the fluid movement direction. A swirl flow generation region formed as a substantially circular internal space in a predetermined range on the side, and a turbulent flow generation region formed as a non-circular internal space on the downstream side of the swirl flow generation region It is characterized by having it.
[0015]
  Claim4According to the configuration, the yarn end is swung by the swirl flow of the compressed air in the swirl flow generation region formed as the nozzle pipe space having a circular cross section in a predetermined range on the downstream side in the fluid ejecting direction from the ejection hole. In the turbulent flow generation region formed as a non-circular nozzle pipe space on the downstream side, an impact due to turbulent flow is applied to the tip side of the yarn end, and the fibers are blown off and removed. Will come to be. That is, the part ahead from the non-untwisted part in the conventional twisted strong twisted yarn can be removed by the turbulent flow by the partition member during the untwisting action. Therefore, after the piecing operation in which the ends of the yarn from which the tip has been removed from the non-untwisted portion are overlapped, the beard portions are not left on both sides of the knot, and the piecing can be performed satisfactorily.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic diagram of the equipment configuration of one winding unit of an automatic winder provided with a yarn splicing device according to the present invention.
[0019]
In the winding unit U, the yarn Y drawn from the spinning bobbin B mounted on the tray (conveyance medium) 1 is unwound by the winding bobbin (yarn winding body) B to the winding package P. 2, wound on a winding package P rotated by a grooved traverse drum 5 through a tension applying device 3 and a slab catcher (yarn defect detecting device) 4. At this time, when a yarn defect such as a slab in the running yarn is detected by the slab catcher 4, the cutter provided inside or in the vicinity of the slab catcher is operated to cut the running yarn Y and take up. After stopping, the yarn joining operation is performed.
[0020]
This yarn joining operation is performed by the winding side yarn end guiding means 10, the yarn feeding side yarn end guiding means 11, and the yarn joining device 12. When the traveling yarn Y is cut, the lower yarn is sucked into the suction port 11a of the yarn supply side yarn end guide means 11. The upper thread is wound into the winding package P. The winding-side yarn end guide means 10 pivots from the bottom to the top about the shaft 10b so that the suction port 10a extends along the winding package P. At this time, the grooved traverse drum 5 rotates in the reverse direction and the yarn end is sucked into the suction port 10a. The winding-side yarn end guiding means 10 that has sucked in the yarn end pivots from top to bottom, whereby the winding-side upper yarn is guided to the yarn joining device 12. On the other hand, when the yarn supply side yarn end guide means 11 pivots from the bottom to the top around the shaft 11b, the yarn supply side lower yarn is guided to the yarn joining device 12. Thereafter, after the yarn ends are spliced by the yarn joining device 12, rewinding is resumed.
[0021]
A schematic configuration of the yarn joining device 12 is shown in FIGS. During normal rewinding, the yarn Ys passes from the bobbin B through the fixed guide 16 provided on one side of the slab catcher 4 and the swiveling guides 17 and 18 provided on both sides to the package P through the yarn splicing device 12. Taking a route.
[0022]
The yarn joining device 12 joins spun yarns (yarn ends) formed by twisting short fibers. Basically, the yarn joining member 41, the yarn presser device 42, the untwisting nozzles 43 and 44, the yarn It is composed of a shifting lever 45, yarn cutting devices 46 and 47, and yarn clamping devices 48 and 49, and the yarn end guidance by the winding side yarn end guiding means 10 and the yarn feeding side yarn end guiding means 11 is not performed at the same time. This is done with a time gap of. That is, the yarn end YP on the package side is first guided to the yarn joining device 12. The yarn end YP on the package side is sucked and captured by the winding side yarn end guiding means 10 that has swung to the catching position near the package P, and the winding side yarn end guiding means 10 pivots to the lower side of the yarn joining device 12. Almost simultaneously with the stop, the turning lever 20 of the clamping device 49 on the package P side is turned by a control cam (not shown), and comes into contact with the fixed support block 21 to stop. At this time, the yarn YP moves while being supported by the turning lever 20 and is held between the support block 21 and the turning lever 20.
[0023]
On the other hand, the yarn YP positioned on the fixed guide 16 and the swivel guides 17 and 18 while the swivel lever 20 is operating is guided along the inclined surfaces 16a, 17a and 18a of the guides 16, 17, and 18. Check whether the yarn YP is present by the slab catcher 4 installed in the same position as the guide groove 19 and whether the two yarns are accidentally sucked by the winding-side yarn end guide means 10. After confirming the yarn YP, the swivel guides 17 and 18 are swung counterclockwise around the support shaft 22 by a control cam (not shown), and the yarn YP is swung away from the slab catcher 4. The guides 17 and 18 are fitted into the escape grooves 17b and 18b.
[0024]
Further, the yarn supply side yarn end YB sucked and captured by the yarn supply side yarn end guide means 11 immediately after the yarn cutting is almost simultaneously with the turning of the turning type guides 17 and 18, and the yarn supply side yarn end guide means 11 is turned. Is guided to the upper side of the yarn joining device 12. The support plate 23a of the clamp device 48 moves along the guide plate 24 with the yarn YB in the same direction as the turning lever 20 by a control cam (not shown) almost simultaneously with the turning stop of the yarn supply side yarn end guide means 11. Then, the yarn YB is held between the support plate 23a and the support block 23b in contact with the fixed position fixed support block 23b.
[0025]
A yarn splicing member 41 is installed at substantially the center of the yarn splicing device 12. As shown in FIG. 2, the yarn end control plates 25 and 26, the yarn presser device 42, the untwisting nozzles 43 and 44, the guide plates 27a and 27b, and the guide rod 28a. 28b, yarn cutting devices 46 and 47, and fork guides 29 and 30 are sequentially arranged. Further, on the side portion of the yarn joining member 41, a yarn support lever 45 including a support shaft 31 and levers 32 and 33 that pivot about the support shaft 31 is installed. The yarn shifting lever 45 is arranged such that after the yarn supplying side yarn end guiding means 11 and the winding side yarn end guiding means 10 guide the mutual yarn ends YP, YB to the outside of the yarn joining device 12, the yarn ends YP, YB are threaded. Guide to the connecting device 12 direction. Note that the swivel range of the yarn shifting lever 45 is a range in contact with the stopper 34 installed between the fork guide 29 and the yarn clamping device 48.
[0026]
As shown in FIG. 4, the yarn joining member 41 is screwed to the bracket 52 with a bolt 53 via a front plate 51, and a cylindrical yarn joining hole 54 is formed at substantially the center of the yarn joining member 41. A slit 55 that is formed and suitable for inserting the yarns YP and YB from the outside is formed over the entire tangential direction of the yarn joining hole 54, and the fluid ejection nozzle holes 56 and 57 are connected to the yarn joining hole 54. It is drilled in an open state. The nozzle holes 56 and 57 are arranged at different positions in the direction perpendicular to the paper surface of FIG. 4 so that the swirling directions of the fluids ejected from these are opposite to each other.
[0027]
That is, the yarn splicing device 12 includes a yarn splicing member 41 that includes a fluid splicing nozzle for yarn splicing (untwisting nozzles 43 and 44), and twists the tip end portions (the portions that overlap at the time of yarn splicing). After untwisting in the untwisting nozzle 43 for the winding side yarn end and the untwisting nozzle 44 for the yarn feeding side yarn end, a swirling flow of fluid such as compressed air is acted on the yarn joining member 41 to connect them. The untwisting nozzles 43 and 44 are provided separately on both sides (upper and lower sides) of the yarn joining member 41.
[0028]
Next, the untwisting nozzle in the untwisting mechanism K will be described. In the following description, “upstream side” and “downstream side” are defined by the direction in which the fluid ejected from the fluid ejection port 62 flows through the nozzle pipe 61. That is, in the nozzle pipe 61, the upstream side means the side closer to the nozzle port 68 (inlet), and the downstream side means the side away from the nozzle port 68 (inlet).
[0029]
The untwisting nozzles 43 and 44 are the same, and one nozzle 43 will be described. As shown in FIG. 6, the untwisting nozzle 43 includes a fluid ejection hole 62 that opens to the inner peripheral surface of the nozzle pipe 61 and a predetermined downstream side from the ejection hole 62 at a predetermined distance from the nozzle port 68 of the nozzle pipe 61. The swirl flow generation region SR formed as the inner space 61a having a circular cross section in the range, and the turbulent flow formed as the after-mentioned partial spaces 66 and 66, which are inner spaces having a non-circular cross section, on the downstream side of the swirl flow generation region SR. And a generation region LR. The fluid ejection port 62 is formed so as to be inclined toward the downstream side with respect to the orthogonal direction of the pipe axis so that the fluid is ejected into the nozzle pipe 61 in a direction inclined toward the downstream side.
[0030]
More specifically, the untwisting nozzle 43 is continuously provided on the downstream side of the inlet portion 61A having a substantially constant inner diameter over the entire length, and the inner diameter gradually increases toward the downstream side. It is composed of a cylindrical nozzle pipe 61 having a taper portion 61B, and a compressed air ejection hole 62 is formed at a location away from the upstream end (yarn introduction port) of the inlet portion 61A by a predetermined distance. That is, the fluid jet port 62 is formed in the middle of the inlet portion 61A. The taper portion 61B is provided with a partition plate 63 that partitions the internal space in a direction intersecting the third axis z that is the pipe axis.
[0031]
The ejection hole 62 is inclined by α with respect to the third axis z when viewed in the cross-sectional direction shown in FIG. 6 (a), and with respect to the third axis z when viewed in the planar direction shown in FIG. 6 (c). It is perforated in a state where β is inclined. In this example, α = 45 degrees and β = 16 degrees are set. The partition plate 63 is inserted and fixed by press-fitting or the like into slits 64 and 64 formed through the nozzle pipe 61 so as to extend in the diameter direction passing through the third axis z. It is set to a continuous range up to 67 and is inclined γ (= 21 degrees) with respect to the first axis x as shown in FIG. Further, in the third axial direction view, the ejection hole 62 is inclined with respect to the second axial center y orthogonal to the first axial center x, that is, inclined toward the side closer to the inclination direction of the partition plate 63 [ See FIG. 6 (b)].
[0032]
Incidentally, the length of the partition plate 63 is set to a value of about 40% of the total length of the nozzle pipe 61. Further, the ratio of the axial distance w between the center of the nozzle hole inner diameter portion of the ejection hole 62 and the partition plate 63 and the inner diameter d of the nozzle pipe 61 is set to w: d≈5: 2. The ratio w: d may be set in the range of 3: 2 to 7: 2. In addition, the above description is a case where the twist direction of the yarn Y is Z-type (Z twist). When the twist direction of the yarn Y is S-type (S twist), the angle β of the ejection hole 62 is −β and the angle γ of the partition plate 63 is −γ, as indicated by a virtual line in FIG. Each is set, but the other specifications are the same as in the case of the Z type.
[0033]
According to the untwisting nozzle 43 configured as described above, as shown in FIG. 7 (a), when compressed air is ejected from the ejection hole 62, a large swirl flow (arrow m) and a small swirl flow ( An arrow n) is formed, but the small swirling flow disappears in the vicinity of the ejection hole 62, and the inner space 61a having a circular cross section is substantially controlled by the swirling flow indicated by the arrow m. Corresponds to the swirl flow generation region SR. In the partition plate 63 portion (downstream from the downstream end of the swirl flow generation region SR), a normal swirl flow does not occur, and swirl occurs in the pair of semicircular partial spaces 66 and 66 separated by the partition plate 63. It changes into a turbulent air flow that is not a flow, and its partial space 66 (region from the upstream end of the partition plate 63 to the pipe outlet 67) corresponds to the turbulent flow generation region LR.
[0034]
The yarn end untwisting behavior by the untwisting mechanism K will be described with reference to FIGS. In FIG. 7, the compressed air supplied from the air supply path 65 is ejected from the ejection hole 62 of the nozzle pipe 61 into the pipe in the direction of the arrow q and flows toward the pipe outlet 67 as a whole. A suction airflow due to negative pressure is generated at the (pipe inlet), whereby the yarn end YT is drawn into the nozzle pipe 61.
[0035]
The retracted 5-end YT is swung in the swirl flow generation region SR to be untwisted. The yarn end YT approaching the partition plate 63 is impacted by the collision with the end edge 63a (upstream end), bent due to irregular motion due to turbulence, collision with the side surface 63b of the partition plate 63, Alternatively, due to the occurrence of the fluttering movement, etc., in the turbulent flow generation region LR, a powerful action that is solved while the most distal portion of the yarn end YT is blown off is exhibited.
[0036]
In other words, the partition plate (an example of a partition member) 63 is disposed at a position that is a predetermined distance away from the ejection hole 62 on the downstream side, and the partition plate 63 substantially includes the inner space of the nozzle pipe 61 in two parts. It is provided in a state of being partitioned into spaces 66 and 66. The partition plate 63 also functions as a collision member that collides with a part of the yarn end YT swung around by the swirling flow by the compressed air from the ejection hole 62. The edge 63a of the partition plate 63 is upstream of the collision member. It is also a side end face.
[0037]
As a result, as shown in FIG. 7 (a), the yarn end YT is in an untwisted state in which the yarn end YT is well untwisted even in a spun yarn that is difficult to untwist, such as a strong twisted yarn of a long fiber. Thus, the conventional untwisted portion a shown in FIG. 10 does not occur. Therefore, even if the yarn ends are subsequently spliced using a swirling flow of compressed air, it is avoided that a beard portion h as shown in FIG. 11 is generated on both sides of the joint portion b. Therefore, the yarn can be spliced well. 8 shows a state where the Z-twisted yarn is untwisted, and FIG. 9 shows a state where the S-twisted yarn is untwisted. In any state, the direction of the fluid jet 62 is provided so as to be biased so that the large (strong) swirling flow m is in the untwisting direction.
[0038]
Hereinafter, items related to the partition plate 63 will be described.
(1) If the partition plate 63 is too close to the nozzle port 61 (yarn end introduction port), the suction air flow toward the nozzle pipe 61 in the vicinity of the nozzle port 68 is reduced, and it is difficult to suck the yarn end into the nozzle pipe 61. . (2) By partitioning the internal space of the nozzle pipe 61 with the partition plate 63, the cross-sectional area of the internal space becomes small (the chamber becomes narrow), and the rotation of the yarn end within the nozzle pipe 61 is promoted. Thereby, the untwisting function is promoted.
[0039]
(3) The partition plate 63 may be detachable instead of bonded. Thereby, depending on conditions, the part of the partition plate 63 can be freely attached or not attached. {Circle around (4)} It is desirable that there is no gap between the partition plate 63 and the nozzle pipe 61, which makes it possible to prevent air leakage and prevent fibers (fibers) from being caught.
[0040]
(5) The leading edge of the yarn end does not intermittently collide with the upstream side of the partition plate 63 (the leading edge does not enter or exit the partial space), but the leading edge first enters the partial space 66. When entering, it collides with the upstream side of the partition plate 63, and the most distal portion rotates in the partial space 66 to remove (untwist) the fibers. That is, the most advanced portion does not collide with the upstream end of the partition plate 63, but the most advanced portion rotates by the turning of the upstream portion (the swirling portion) of the most advanced portion. The predetermined amount of fibers can be reliably removed.
[0041]
Next, the outline of the yarn joining operation by the yarn joining device 12 will be described below.
-Yarn preparation, clamping process-
In FIG. 1, when the detecting device detects that the yarn Ys being rewinded has been cut or that the bobbin B has run out of yarn, the drum 5 stops rotating, and a one-rotation clutch (not shown) functions. The yarn splicing operation is performed by various control cams installed on the rotating shaft or various control cams interlocking with the shaft.
[0042]
First, the winding side yarn end guide means 10 pivots downward from the state where the yarn end is sucked at the phantom line position in FIG. 1, and the yarn supply side yarn end guide means 11 moves the yarn end at the solid line position in FIG. The swivel moves from the sucked state to the upper virtual line position. As a result, the yarn YP on the package P side and the yarn YB on the bobbin B side pass through the side of the yarn joining device 12 and stop at the outer position. That is, after the winding-side yarn end guiding means 10 turns from the upper suction position to the lower guiding position, until the yarn feeding-side yarn end guiding means 11 starts turning, the package P side in FIG. The yarn clamping device 49 is operated to clamp the yarn YP between the turning lever 20 and the support block 21 and the yarn YP is inserted into the guide groove 19 of the fixed guide 16 and the turning guides 17 and 18 disposed in the vicinity of the slab catcher 4. The slab catcher 4 checks the presence and thickness of the yarn YP.
[0043]
Subsequently, the swivel guides 17 and 18 pivot about the support shaft 22 in the counterclockwise direction in FIG. 3 to remove the yarn YP from the slab catcher 4 and fit into the escape grooves 17b and 18b. Then, the yarn supply side yarn end guiding means 11 sucking the yarn YB on the bobbin B side turns to the outer position (upper position) of the yarn joining device 12 and stops. At this time, the yarn YB is sandwiched between the support plate 23a and the support block 23b of the yarn clamp device 48.
[0044]
-Yarn gathering and cutting process-
When the yarn clamping process is completed, as shown in FIGS. 2 and 3, the levers 32 and 33 of the yarn moving lever 45 pivot about the support shaft 31, and the yarns YP and YB on both sides are moved to the fork guides 29 and 30. Are guided separately into the guide grooves 29a, 29b, 30a, 30b, and inserted into the yarn joining holes 54 of the yarn joining member 41 shown in FIG.
[0045]
Next, the yarn cutting devices 46 and 47 perform yarn cutting YP2 and YB2 at a predetermined distance from the yarn clamping devices 48 and 49 as shown in FIG. That is, in FIG. 12, the yarns YP and YB on both sides of the yarn splicing member 41 are held between the yarn clamping devices 48 and 49, and the yarn shifting lever 45 is operated, so that the rod 31a shown in FIG. Is moved in the direction of the arrow 31b, and the yarn cutting is performed in a state where the levers 32 and 33 are pivoted clockwise around the support shaft 31. When the yarn shifting lever 45 and the yarn cutting devices 46 and 47 are operated, the yarn presser device 42 stands by at the position shown in FIG.
[0046]
-Yarn end untwisting process-
As shown in FIG. 13, when the yarn ends YP1, YB1 are sucked by the untwisting nozzles 43, 44, the yarn moving lever 45 moves in the direction R away from the yarn at the same time or in succession, and the yarn ends YP1, YB1 is sucked deeply into the untwisting nozzle and untwisted into a state suitable for yarn splicing by jetting compressed air as described above, and fibers at the cutting edge corresponding to the conventional untwisted portion a are scattered. To be removed. In addition, it is desirable to set the suction start timing of the untwisting nozzles 43 and 44 (spout start timing from the spray hole 62) immediately before the yarn is cut by the cutting devices 46 and 47.
[0047]
-Yarn splicing process-
When the yarn ends YP1 and YB1 are untwisted by the yarn end untwisting nozzles 43 and 44 so that the yarn ends YP1 and YB1 are suitable for piecing, the suction action by the untwisting nozzles 43 and 44 and the ejection holes 62 is stopped simultaneously, or Before and after, as shown in FIG. 14, the yarn shifting lever 45 is actuated again to guide the yarn ends YP1 and YB1, and the yarn ends pulled out and untwisted from the untwisting nozzles 43 and 44 are spliced together. The members 41 are overlapped at a predetermined position.
[0048]
At this time, the lever 32 of the yarn shifting lever 45 turns to a position where it abuts against the stopper 35, and the yarn presser device 42 operates to turn to the state shown in FIG. 14, and the yarn presser plates 42a and 42b and the guide rod 28a and 28b bend the yarn YP and YB between the yarn joining hole 54 and the clamp devices 48 and 49, strictly speaking, between the yarn joining hole 54 and the levers 32 and 33.
[0049]
The yarn ends YP1 and YB1 inserted into the nozzle pipe 61 of the untwisting nozzles 43 and 44 are drawn into the yarn joining hole 54 of the yarn joining member 41 by the yarn feeding lever 45 and the yarn pressing device 42, and FIG. 4 is positioned and set by the control plates 25 and 26 and the thread presser 42 shown in FIG. 4 in a state where the thread ends YP1 and YB1 are in contact with each other. Then, after the end of the yarn end is set, the yarn splicing is performed by the swirling flow of the compressed air injected from the fluid injection holes 56 and 57 in FIG.
[0050]
[Another embodiment]
<< 1 >> As shown in FIG. 15, the partition member 63 provided in the nozzle pipe 61 is cantilevered by being inserted into a downstream end slit 69 formed only at the downstream end of the pipe only at the downstream end. By using the horizontally-oriented substantially T-shaped partition plate 70, it may be equipped in a state in which a slight gap s1 is formed between the pipe inner surface 61a and almost all of its length. Even in this case, the internal space of the nozzle pipe 61 is substantially partitioned into a plurality of partial spaces by the partition plate 70.
[0051]
<< 2 >> As shown in FIG. 16, each of the other two separator plates 71, 71 supported by the pair of slits 64, 64 formed in the nozzle pipe 61 over the entire length, The nozzle pipe 61 may be provided at a predetermined position in a state where the gap s2 along the axis z is formed. Even in this case, the internal space of the nozzle pipe 61 is substantially divided into a plurality of partial spaces by the partition plates 71 and 71.
[0052]
<< 3 >> As shown in FIG. 17, the partition member 63 may be configured by two plate members 72, 72 so as to have a cross shape when viewed in the direction of the third axis z. Even in this case, the internal space of the nozzle pipe 61 is substantially divided into a plurality of partial spaces by the two plate members 72, 72.
[0053]
【The invention's effect】
As described above, according to the yarn splicing device and the yarn splicing method of the present invention, the untwisting nozzle that sucks the yarn end and untwists the yarn end by the action of the fluid flow is the fiber at the forefront of the yarn end. Is surely blown off and removed, so that even if the yarn is difficult to untwist like a strong twisted yarn of wool, a non-untwisted part may be formed after untwisting as in the past. As a result, it was possible to obtain a good yarn splicing with no whisker portions on both sides of the knot.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a device configuration of a winding unit of an automatic winder.
FIG. 2 is a front view showing a pneumatic yarn splicing device.
FIG. 3 is a plan view of FIG. 2;
FIG. 4 is a cross-sectional view showing an example of a yarn joining member.
FIG. 5 is a partially cutaway plan view of an untwisting mechanism showing a relationship between a yarn splicing member and an untwisting nozzle.
6A and 6B show the structure of the untwisting nozzle, where FIG. 6A is a sectional side view, FIG. 6B is a side view, and FIG. 6C is a partial plan view.
7A is a side view showing an untwisting action in the untwisting nozzle, and FIG. 7B is an action view showing a swirling flow.
FIG. 8 is a diagram showing a positional relationship between a Z-twisted yarn and an untwisting nozzle.
FIG. 9 is a diagram showing a positional relationship between an S twisted yarn and an untwisting nozzle.
FIG. 10 is a side view showing an untwisted state of a strong twisted yarn by a conventional untwisting mechanism.
FIG. 11 is a side view showing a spliced state of a strong twisted yarn by a conventional yarn splicing device.
FIG. 12 is an explanatory view showing a yarn gathering and cutting process.
FIG. 13 is an explanatory view showing a yarn end untwisting step.
FIG. 14 is an explanatory view showing a yarn splicing step.
FIG. 15 is a view showing an untwisting nozzle having a first different structure.
FIG. 16 is a view showing an untwisting nozzle having a second different structure.
FIG. 17 is a view showing an untwisting nozzle having a third different structure.
[Explanation of symbols]
43,44 Untwisting nozzle
61 Nozzle pipe
62 Fluid spout
63 Colliding member, partition member, member
63a Edge, end face
66 subspace
SR swirl flow generation area
LR Turbulence generation region
d Nozzle pipe inner diameter
w Distance between spout and compartment

Claims (4)

A yarn splicing device having an untwisting nozzle for untwisting the twist of the introduced yarn end,
The untwisting nozzle includes a nozzle pipe, a fluid ejection hole that opens in an inner peripheral surface of the nozzle pipe and generates a swirling flow in the nozzle pipe, and a predetermined distance downstream from the fluid ejection hole in the fluid movement direction. And a partition member arranged at a distant position, and the partition member is provided in a state of substantially partitioning the internal space of the nozzle pipe into a plurality of partial spaces. Compartment according to 請 Motomeko first member, said jet holes yarn splicing device from a position a predetermined distance away on the downstream side of the fluid moving direction is configured as a plate-shaped extending in the downstream from. Set in the range 1: ratio of 1.5 of the distance to the marking member, and an inner diameter of the nozzle pipe in the ejection hole portion according to the center or al請 Motomeko 1 of the ejection hole: 1 to 3.5 Yarn splicing device. A yarn splicing device having an untwisting nozzle for untwisting the twist of the introduced yarn end,
The untwisting nozzle has a nozzle pipe and a fluid ejection hole that opens in an inner peripheral surface of the nozzle pipe and generates a swirling flow in the nozzle pipe. A swirl flow generation region whose cross section is formed as a substantially circular internal space in a predetermined range on the downstream side in the moving direction, and a turbulence formed as a non-circular internal space on the downstream side of the swirl flow generation region. A yarn splicing device having a flow generation region.

Images