JPS641387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding unit in an automatic winder, and more particularly to a device for controlling a balloon of yarn unwound from a tube.

The spun pipe yarn is rewound using an automatic winder to remove yarn defects and obtain a package of a predetermined amount or shape.

In this case, the pipe thread supplied to the winding unit is inserted into the peg of the unit in a substantially upright position, and the thread pulled out from the pipe thread is directed upward in the direction of the center axis of the pipe thread, and the thread layer of the pipe thread is Run around the area. Therefore, the thread pulled out from the tube thread travels while drawing a balloon, and the balloon is caused by the mass of the thread,
The shape, balloon radius, etc. are determined by the running speed, air resistance, etc., and also vary depending on the number of yarn layers of the tube yarn, that is, the height position of the separation point from the yarn layer of the yarn.

The above-mentioned ballooning of the yarn is performed stably when there are many yarn layers of the tube yarn, but becomes unstable as the yarn layer decreases and the separation point of the yarn from the yarn layer moves downward, i.e. As the distance between the separation point and the yarn guide regulating the upper end of the balloon above the tube yarn increases, the balloon collapses, and knots of the balloon occur at multiple locations, resulting in multiple balloons where the joints of the balloon become threads. Contact the layer surface. For this reason, as the unraveled yarn travels, the yarn that has not yet been unraveled shifts in the direction of the axis of the tube yarn, so-called loop dropout, which may result in the occurrence of fraying. Once the threads have formed, they may be wound without being removed, or they may cause the thread to break.

The present invention aims to solve the above problems. That is, the present invention forms a wall surface that covers the periphery of the running path of the thread unraveled from the pipe thread,
A fluid jet hole is provided on the wall surface, and the fluid flow jetted from the jet hole is applied to the running yarn to control the ballooning of the yarn to improve the unraveling property and to prevent the above-mentioned loop slipping phenomenon. It is something.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an example of a winding unit is shown. The winding unit 1 includes a yarn support section 2, a package 4 that winds the yarn Y pulled out from the yarn tube 3 at the support section, and a traverse drum 5 that drives the package and traverses the yarn. Further, a balloon control member 6, a yarn guide 7, a tensor (not shown), a waxing device, a slub catcher 8, a yarn splicing device 9, etc. are sequentially arranged along the yarn traveling path between the pipe yarn 3 and the winding package 4. Ru. 10 is a suction pipe for thread splicing, 11
is a relay pipe, and the two-dot chain line positions 10a and 11
A, the yarn end on the package side and the yarn end on the tube yarn side are sucked and held, and each yarn end is guided into the yarn splicing device 9.

In the case of the winding unit described above, each unit is not provided with a yarn storage magazine, and each yarn is inserted into a carrier 13 having pegs by a yarn supply conveyor 12 provided along the unit. The unit is transported, inserted into the carrier 13, taken to the winding position of each unit, and rewound. Furthermore, the empty bobbin 14 that has been rewinded is placed in the carrier 1.
The empty bobbin is discharged from the unit in the state in which it is inserted into the tube 3, and is transported on an empty bobbin discharge conveyor 15 disposed along the unit.

Accordingly, the yarn end of the supplied pipe yarn for splicing is drawn out in advance, is inserted into the core tube from the upper end of the pipe thread, and is transported integrally with the pipe yarn. When the pipe yarn 3 is positioned at the winding position 2 in the above state, air is ejected from the air jet nozzle 16 provided below the carrier 13 and is ejected into the core tube of the pipe yarn through the space inside the carrier. , the balloon control member 6 blows the hanging yarn end upwards outside the core tube.
It passes through the inside and is sucked and held by the waiting relay pipe 11a.

The balloon control member 6 has a bracket 19 attached to the frame 18 via a bracket 17 with the center axis line aligned with the core tube axis of the tube yarn 3 above the tube yarn 3 as shown in FIG. Fixed. 20 is a long hole whose position can be adjusted. That is, as shown in the third figure, the balloon control member 6 is composed of a pipe-shaped member having a cylindrical side wall 21 that surrounds the running yarn, and an opening of a fluid jet hole 22 is formed in the inner peripheral surface of the side wall 21. be done. In addition, the above-mentioned jet hole 2
2 is conveniently opened tangentially to the inner circumferential surface 21.

That is, as shown in FIG. 3A, the fluid injected from the injection nozzle 20 into the internal space 23 of the balloon control member becomes a swirling flow in the direction of the arrow 24, and a spiral flow 25 is generated toward the upper and lower opening end faces. When the direction 24 of the swirling flow is the same as the direction in which the yarn is unraveled from the tube yarn 3, it produces an effect of reducing the unraveling resistance, while the direction of the swirling flow is opposite to the direction in which the yarn is unraveled. In the case of , the effect of increasing the resistance occurs. In other words, by generating a swirling flow in the same direction as the unraveling direction of the thread, the balloon formation of the thread is promoted and the balloon diameter is increased. The fluid injection nozzles 22 are formed at two positions above and below the inner circumferential surface, but it is also possible to provide them at one location in the center, at two or more locations in the axial direction, or in a vertically elongated flat shape. Various embodiments are possible, such as forming it as an opening. In addition, air is used as the fluid, and the air pressure is adjusted as appropriate.
26 is an air supply conduit.

Furthermore, various shapes of the side walls covering the threads are possible. 4 to 6 show other embodiments, and the fourth
The balloon control member 27 in Figures A and B has a side wall formed in a rectangular or polygonal shape, and fluid ejection ports 28 and 2 that eject fluid from the side wall into the internal space.
8 is formed to be inclined, and serves to assist the turning movement of the thread. In this case, the ballooning caused by the swirling does not result in a regular cone-shaped balloon, but on the contrary, the balloon may collapse and become an irregular balloon.

FIG. 5 shows yet another embodiment, in which the cross section of the balloon control member 29 is circular as in FIG. . When such a slit is provided, the winding unit has a peg for supporting the yarn, and the winding unit shunts the yarn stored in the magazine arranged in each unit, and connects it to the yarn end holding suction pipe in the center of the magazine. This is effective when introducing the thread passing between the tube threads inserted into the pegs into the internal space of the balloon control section through the slit 30. Therefore, when the tube yarn still attached to the carrier is transferred to the winding position of the unit as shown in Fig. 2, the yarn end is blown up and blown upward through the internal space of the balloon control member. Since it can be raised, there is no need to provide the slit 30. The slit 30 can also be provided, and the slit 30 is effective when guiding the end of the side yarn by hand.

Further, the balloon control member 31 shown in FIG.
This control member has a substantially truncated conical shape and is formed by sequentially decreasing the cross-sectional area of No. 2 in the thread running direction. That is, the yarn entry side 33 has a larger cross-sectional area than the yarn exit side 34, and the area is gradually decreased continuously, and the opening of the fluid jet nozzle 35 formed on the inner peripheral surface is also tangential to the inner peripheral surface. It is true. In this case, both end openings 33,
Since the flow rate of the fluid ejected from the yarn entry side opening 33 tends to be larger than that at the yarn exit side opening 34, there is an effect of further increasing the swirling force of the ballooning of the yarn pulled out from the pipe yarn. Further, the fluid ejection holes of each of the balloon control members may be provided so as to be inclined toward the thread entry side or the thread exit side.

Balloon control members of various shapes described above can be applied, and furthermore, the control member can be fixedly attached as shown in Fig. 2, or can be slid in the vertical direction and moved downward as the thread layer of the tube yarn decreases. Alternatively, the annular balloon control member may be cut in the longitudinal direction and the half portions may be connected with a hinge so that they can be opened and closed.

The operation of the balloon control member as described above will be explained with reference to FIGS. 7 to 9. Note that the control member shown in the third figure is used.

FIG. 7 shows the case where the balloon control member 6 is fixed at a fixed position above the tube yarn, and shows the state of ballooning when the amount of the yarn of the tube decreases, that is, when the yarn is pulled out from below the bobbin. Note that the unraveling direction of the thread and the swirling direction of the fluid generated in the internal space of the balloon control member are both in the same direction as the arrow 24.

In this case, the balloon B generated by thread withdrawal
1, B2, even if the knot 36 is formed, the diameter of the ballooning, particularly the diameter d1 of the balloon B2 including the separation point P from the yarn layer, is increased by the effect of the swirling flow. That is, FIG. 8 shows the case where a simple balloon breaker 37 is used, and there is no swirling flow, so
The diameter of the balloon, especially the diameter of the balloon including the separation point, is extremely small, and the direction of separation of the yarn from the yarn layer is along the bobbin 14, resulting in a yarn layer in which the unraveled yarn has not yet unraveled. Tends to touch surfaces. On the other hand, in FIG. 7, the angle between the yarn separation point P and the axis of the bobbin (hereinafter referred to as separation angle θ) is large. For this reason, the threads that have unraveled and separated from the thread layer do not come into contact with the thread layer surface again.

The loop-drop phenomenon caused by the loose state in FIG. 8 will be explained with reference to FIGS. 12 and 13. As shown in Figure 12, the unraveling of the yarn from the tube yarn 3 is generally of the type in which the separation point traverses a substantially constant width W from the upper yarn layer and gradually moves downward 42. . In such a case, the first
As shown in Figure 3, the separation point of the thread moves alternately in the directions of arrows 37 and 38, and there is not much problem when unraveling in the direction of arrow 37, which moves from top to bottom, but especially along the direction of arrow 38. When unraveling, for example, the outermost layer yarns Y ₁ , Y ₂ to Yn are unraveled sequentially starting from Yn, and then yarn Y ₂ is unraveled, and then the upper yarn Y ₁ is unraveled. When this is done, the departure point moves in the direction of arrow 37. When yarn Y ₂ is unraveled and pulled out, if the balloon is insufficient and the separation angle θ is small, it may come into contact with the upper yarn Y ₁ , and the slightly loosened ring-shaped yarn Y ₁ Pulled by the unraveled thread, the separation point does not move properly, and the thread _Y1 falls out along the bobbin 14 while remaining in a loop. A so-called loop drop phenomenon occurs.

Therefore, when the balloon B2 is sufficiently formed and the separation angle θ is large as shown in FIG. 7, the unraveled yarn Y will not come into contact with the upper yarn again as shown in FIG. The separation point of the yarn moves while drawing a spiral locus around the surface of the yarn layer, without causing loop dropout due to separation from the layer.

The formation of the balloons B1 and B2 is performed by the control member 6.
The increase in yarn swirling force due to the swirling flow in the same direction as the yarn unraveling direction inside the control member 6, and the lower end opening 6 of the control member 6
The balloon radius is further increased under the action of the fluid flow flowing out from a (FIG. 3, 25). The influence of the above-mentioned swirling flow decreases as the number of yarn layers decreases and it is located below the bobbin. Therefore, if the balloon control member 6 is moved as the thread layer changes, as shown in FIGS. 9 and 10, the balloon of the thread separated from the thread layer will maintain a large separation angle θ, resulting in a stable balloon. Become. That is, the member 6 is moved so that the distances l1 and l2 between the lower end opening 6a of the balloon control member 6 and the separation point P of the thread are approximately equal.
That is, the distances l1 and l2 are smaller than the distance L in FIG. 7, and the unraveling can be performed without reducing the influence of the swirling flow on the yarn separation point. The movement of the balloon control member can be performed by controlling the amount of movement by using a driving means such as a fluid cylinder, a rack and pinion, or a timing pulley in synchronization with the reduction of the yarn layer. The reason why the above drive needs to be performed independently for each winding unit is because the winding state in each winding unit is independent of each unit.

Note that the embodiment shown in the eleventh figure is an example in which the entire pipe thread is surrounded by the balloon control member 39, and the ninth,
The balloon is stably generated without moving the member 6 shown in FIG. 10. That is, the balloon control member has a circumferential side wall 40 having a diameter sufficiently larger than the maximum thread layer diameter of the tubular thread, and has a length approximately equal to the entire length of the tubular thread layer, and the inner circumferential surface 40 Fluid ejection holes 41 are formed at a plurality of locations to generate swirling air currents in the same direction as the unraveling direction of the yarn. In this case, the member 39 can be made integral, but when applied to a winding unit, the cylindrical member is divided into halves for ease of supplying and discharging the pipe yarn to the winding position. It is desirable that the members be hinged or linked so that they can be combined and separated.

As described above, according to the present invention, the wall surface substantially covers the periphery of the running path of the thread unraveled from the pipe yarn, and the wall surface is provided with a fluid ejection hole, and the fluid is ejected from the ejection hole. Since the balloon control member is provided to control the ballooning of the yarn by applying a fluid flow to the running yarn, it promotes the formation of a balloon in the yarn unraveled from the tube yarn, and prevents the unraveling at the point of separation between the yarn and the yarn layer. The twisted yarn does not come into contact with the yarn that has not yet been unraveled, and it is possible to prevent the balloon from collapsing, loop slipping, etc., and to obtain a high-quality wound package.

[Brief explanation of drawings]

FIG. 1 is a side view showing one example of a winding unit, FIG. 2 is an enlarged side view of essential parts of the winding unit according to the present invention, and FIGS. 3 to 6 show various embodiments of the balloon control member. In the figure shown, the third
Figure A is a sectional plan view of the first embodiment of the balloon control member, B is a sectional front view, FIG. 4 A is a sectional plan view of the second embodiment, B is a sectional side view, and FIG. A cross-sectional plan view of the third embodiment, B is a perspective view, FIG. 6A is a cross-sectional plan view of the fourth embodiment, B is a perspective view,
FIG. 7 and FIGS. 9 and 10 are explanatory diagrams showing the state of balloon control by the balloon control member 6, and FIGS. 7A and 7B are diagrams showing the balloon when the yarn layer is reduced when it is attached above the pipe yarn. , FIG. 8 is a diagram showing the state of the balloon when it is a simple balloon breaker and there is no action of fluid, FIGS. 9 and 10 are diagrams showing the state of the balloon when the member 6 is moved, and FIG. 11 12 and 13 are diagrams showing an example in which the entire tube yarn is surrounded by deformation of the member 6, FIGS. 12 and 13 are yarn unraveling operations, and FIG. 12 is an explanatory diagram showing the process of unraveling the tube yarn. , FIG. 13 is a diagram illustrating the loop drop phenomenon. 1... winding unit, 3... tube thread,
6, 27, 29, 31, 39... Balloon control member, 21, 32, 40... Side wall surface, 22, 28,
35, 41, 43...Fluid jet hole, B1, B2,
B3...Balloon.

Claims (1)

[Claims] 1. It has a wall surface that substantially covers the periphery of the traveling path of the yarn unraveled from the pipe yarn, and a fluid jet hole is formed in the wall surface, and the fluid flow jetted from the jet hole acts on the traveling yarn. 1. A winding unit comprising a balloon control member for controlling ballooning of yarn.