JPS6223699B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spun yarn splicing device.

An automatic winder for winding spun yarn into a yarn quantity or package shape suitable for subsequent processes is equipped with a knotter, such as a Fisherman's knot or a weaver's knot, for mechanically tying the yarn.

Such fisherman's knots or weaver's knots are effective in terms of the binding strength of the knot, but are disadvantageous in terms of the size of the knot.

That is, the above-mentioned knot is about three times as large as a single yarn due to its structure, and when a package cage that has been wound back with such a knot is used in the knitting process, the yarn will break at the knitting needle. This can cause inconveniences such as the formation of perforated knitted fabric parts as well as impede the continuous operation of the machine, and when used as weft yarns in looms such as air or water jet looms, yarns that protrude from knotted areas in the weft yarns. This causes inconveniences such as the ends coming into contact with the warp threads forming the opening and the weft threads not reaching the ends of the fabric. Furthermore, knots that appear in the fabric as a final product are defects in the fabric and require correction steps such as removing the fabric at the knots or pushing the knots to the back side of the product.

As a means to solve the above-mentioned drawbacks, there are yarn splicing methods and yarn splicing devices such as the above-mentioned fisherman's knot or weaver's knot, which have completely different yarn knots and knot structures. That is, by applying a compressed fluid to the overlapping yarn end portions, the yarn end portions are intermingled and the respective fibers are intertwined with each other to perform yarn splicing. That is, a fluid ejection nozzle opening is formed in the cylindrical inner hole of the hollow member, two thread ends are inserted into the inner hole of the pipe, and fluid is ejected to the overlapped portion of the thread ends. In addition, in order to mechanically insert two yarn ends into the inner hole of such a hollow member and arrange the yarn ends side by side in the axial direction of the inner hole, a thread insertion slit extending in the axial direction of the hollow member is provided. There is one in which the thread is inserted from the side of the hollow member.

In such a case, if a thread is inserted into the inner hole and the fluid is injected in a direction perpendicular to the axial direction of the inner hole, the flow of fluid will swirl along the inner peripheral surface and the inner hole will flow along the axial direction of the inner hole. A flow toward both end openings is generated, and a part of the swirling flow flows out from the thread insertion slit, and the outflow flow causes the thread end to jump out of the slit and causes a loss in fluid jet energy.

On the other hand, there is a splicing device described in British Patent No. 956992. This yarn splicing device splices multifilaments or tows, and has an 8 to 11 cm outer pipe that has a thread insertion stop along the entire length in the axial direction, and an inner hole of the outer pipe that has another outer pipe of the same length. The inner pipe is inserted into the outer pipe, and the inner pipe also has a slit similar to the above, and the inner pipe is inserted so as to be rotatable relative to the inner peripheral surface of the outer pipe, and the outer pipe has a nozzle for blowing out compressed air. It was formed.

Therefore, when the inner cylinder is rotated by arranging the yarn ends in a long double metal cylinder so that they are overlapped, the yarn may become caught between the inner cylinder and the outer cylinder, or air flow may occur. There is a risk that the system may be disturbed, and it is inefficient because it is manually operated.

The present invention provides a yarn splicing device that is an improvement on the above-described device, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a winding unit of an automatic winder to which the present invention is applied.
A winding unit 4 is rotatably supported on the shaft 2, and during operation of the automatic winder, the unit 4 is also placed on the pipe 3 and fixed as appropriate. Note that the pipe 3 is connected to a blower (not shown), and a suction air current is constantly applied thereto.

To rewind the yarn from the bobbin B to the package P in the winding unit 4, the yarn Y1 is passed from the bobbin B on the peg 5 through the guide 6, and the tensioner 7 applies an appropriate tension to the yarn to prevent yarn unevenness such as slabs. The yarn is wound onto a package P rotated by a winding drum 9 through a detection device 8 that also performs detection, cutting, and running yarn detection.

In such a device, when the detection device 8 detects yarn unevenness in the yarn, a cutter installed near the detection device 8 operates to cut the running yarn Y1, and winding is stopped while the first The second thread guide suction arm 10 operates to move the thread YB on the bobbin B side, and the second thread guide suction arm 11 moves the thread YB on the bobbin B side.
The side yarn YP is guided to a yarn splicing device 12 installed at a position away from the normal yarn traveling path Y1, and after splicing is performed by the yarn splicing device 12, rewinding of the yarn is continued. Note that the first and second yarn guide suction arms 10 and 11 are connected to a pipe 3 that produces suction airflow. Further, since fluid such as compressed air is used in the splicing device 12, a conduit 14 is connected between a pipe 13 on a separate route and the splicing box 15, and the compressed fluid is supplied from the pipe 13.

Figures 2 and 3 show detailed views of the entire yarn splicing device 12.
As shown in the figure. That is, during normal rewinding, the thread Y takes a route from the bobbin B to the package P from the uppermost guide plate 18 via the detection device 8 and the guide plates 16 and 17 arranged before and after the detection device 8.

A yarn splicing device 12 is provided between the guide plates 17 and 18.
are arranged, and the suction ports at the tips of the first suction arm 10 and the second suction arm 11 turn so as to cross each other, and suction the yarn end YB on the bobbin B side and the yarn end YP on the package P side. It pivots to the outside of the guide plates 16 and 18 located above and below and stops.

The yarn splicing device 12 has a yarn splicing member 19 located approximately in the center.
is installed, and a guide arm, which will be described later, and two yarn splicing control nozzles 20 and 21 are installed with the yarn splicing member 19 in between.

Further, on both outsides of the control nozzles 20 and 21, there are thread cutting devices 22 and 23, and a bobbin B for splicing threads.
Yarn splicing guide plates 24 and 25 are fixedly installed to guide the yarns YB and YP on the side and package P side. In addition, the yarn splicing member 19, the control nozzles 20, 2
1. On one side of the yarn splicing device main body 26 consisting of the yarn cutting devices 22, 23 and the yarn splicing guide plates 24, 25, there are yarn shifting levers 28, 2 that pivot around a support shaft 27.
9, and a slit closing lever 31 of the yarn splicing member that pivots around a support shaft 30 is provided on the other side.

The thread shifting levers 28 and 29 are operated by the detection device 8 which detects a slab of the thread Y and cuts the thread using a cutting device (not shown), and the suction arms 10 and 11 operate to guide each other's thread ends YB and YP. The yarn ends YB, YP actuate at the same time as being guided to the outside of the plates 16 and 18.
is guided in the direction of the yarn splicing device main body 26.

The rotation range of the thread shifting levers 28 and 29 is the range in which the thread shifting levers 28 and 29 stop when they come into contact with a stopper 32 having a V-shaped cross section installed between the guide plates 17 and 24. Therefore, by adjusting the position of the stopper 32, the thread shifting can be adjusted. The pivot range of the levers 28, 29 is also adjustable.

The slit closing lever 31 is constructed by inserting an elastic member 35 such as rubber into a pin 34 supported at the tips of two parallel rotating plates 32 and 33. As shown, the rubber member 35 is inscribed in the slit 36 of the yarn splicing member 19 and is configured to close the opening on the yarn entry side of the slit.

The yarn splicing member 19 is screwed 38 to the bracket 37, and as shown in FIGS. 4 and 5, a cylindrical yarn splicing hole 39 is formed approximately in the center, and the yarn is inserted into the hole 39 from the outside. Slit 40 suitable for
And guide surfaces 41 and 42 having a V-shaped cross section are formed.

A spout nozzle 43 is formed in the yarn splicing hole 39 and opens in a direction perpendicular to the center line of the hole.
3, a shape such as a circular cross section or an elliptical cross section can be selected.

When the compressed fluid is ejected from the ejection nozzle 43 into the yarn splicing hole 39, it expands rapidly and forms a large spiral airflow in the center and both sides of the hole axis, that is, in the vertical direction of the hole. It swells and gushes out.

6, 7, and 8 are sectional views perpendicular to the axis of the hole 39, showing various embodiments of the shape of the yarn insertion slit and the opening position of the fluid jet nozzle for the yarn splicing hole 39. That is, in FIG. 6, a slit 40 is formed at the intersection of the V-shaped guide surfaces 41 and 42, and the opening 43a of the fluid jet nozzle 43 is formed so as to face perpendicularly to the axis of the yarn splicing hole.

FIG. 7 shows that the yarn insertion slit 44 is formed to be inclined from the V-shaped guide surfaces 45 and 46 toward the tangential direction of the yarn splicing hole 39, and the opening 47a of the fluid jet nozzle 47 is located near the slit in the yarn insertion direction. The direction of the fluid ejected from the nozzle 47 forms an obtuse angle and is provided so as to open tangentially to the inner circumferential surface of the yarn splicing hole 39.Furthermore, FIG. It is provided on the opposite side from the illustrated position, opens tangentially to the yarn splicing hole 39, and is provided so that the angle between the yarn insertion direction of the slit and the fluid jetting direction is an obtuse angle. .

Among the above yarn joining holes, yarn joining hole 3 shown in FIG.
When the bobbin side yarn end YB and the package side yarn end YP are inserted into 9 and positioned in front of the opening and a fluid jet is applied from the nozzle 48, the fluid flow will flow in the direction of the arrow along the inner peripheral surface of the yarn joining hole 39. swivels to slit 4
There is little chance that the thread will come out from 9, but as shown in Figure 6,
In the case of the yarn splicing hole 39 shown in FIG. 7, there is a risk that the yarn ends may jump out from the slits 40, 44 due to the ejected fluid flow.

Even if the yarn does not jump out of the slit, a portion of the fluid jetted into the yarn splicing hole flows out of the slit, causing energy loss in terms of swirling force.

A rubber member 35 is provided to prevent the yarn from popping out and the fluid from flowing out. , 44, 49 thread entry side opening 5
0, 51, 52, and the pivot lever 33, as shown in FIGS.
It is inserted and supported by a pin 34 that is pivotally supported between 33 and 33. The rubber member 35 is not limited to rubber, and other elastic members can be used as long as it closely closes the slit opening.

Note that when the slit shown in FIG. 6 is closed with an elastic member 35 made of a material different from that of the metal yarn splicing device main body 19, both yarn ends are connected to the elastic member 3 when the yarn ends are turned.
5 has the effect of promoting entanglement of the fibers at the end of the yarn, which is advantageous.

Next, the process of creating yarn splicing in the yarn splicing member 19 described above is shown in FIGS. 11 and 12.

That is, to explain in detail the case of the yarn splicing hole shown in FIG. 8, the yarn end YB on the bobbin B side and the yarn end YP on the package P side to be spliced are inserted through the slit 49 and juxtaposed in the yarn splicing hole 39. .

Both yarn ends YB and YP are regulated by the side edge of the turning lever 31, as shown in FIG. 5 or FIGS. 6 to 8.
It is positioned in front of the opening of the fluid jet nozzle 48, or at a position substantially opposite to the opening of the slit 49 as shown in FIG.
is placed in contact with the inner peripheral surface of the

When the compressed fluid V is ejected into the yarn splicing hole 39 in this state, the compressed fluid V flows along the inner peripheral surface of the yarn splicing hole 39, and when it has made approximately half a turn inside the yarn splicing hole 39, each yarn end
Turn with YP and YB.

Furthermore, at the time when the airflow has completed almost one revolution, the swirling flow F1 and the jetted airflow F2 from the jetting nozzle 48 merge with each other, forming a resultant force F and flowing. At this time, the above thread end
YB and YP move along the trajectory Q of the swirling flow, but when the swirling airflow F1 and the jetting airflow F2 come together, the yarn end YB first moves slightly beyond the opening of the slit 49 in the yarn splicing hole 39. The yarn end YP1 abuts against the inner peripheral surface 39b on the inside, and then moves so that the yarn end YP1 abuts against the yarn end YB1, and at this point, the yarn ends YB,
YP is mixed and acts as one.

That is, as shown in FIG. 12A, the yarn ends YB and YP to be spliced are untwisted by yarn control nozzles 20 and 21, which will be described later, before being introduced into the splicing hole 39. Each fiber is in a substantially parallel state, and the yarn ends YB1 and YP1 intermingle with each other and become integrated as shown in FIG. be converted into

Furthermore, as shown in Fig. 1C, the swirling airflow causes the yarn ends to entangle each other strongly, and both ends of the yarn are entangled f.
Twist f6 is applied between 4 and f5 to complete the yarn splicing.

In addition, in FIGS. 2 and 3, yarn splicing control nozzles 20 and 2 installed above and below the yarn splicing member 19 described above are shown.
1 is provided with nozzle holes 53 and 54 for untwisting the yarn ends, the details of which are shown in FIG.

That is, to explain one control nozzle 53, the yarn end YP on the side of the package P to be spliced is introduced into the nozzle hole 53 through the splicing hole 39.
The yarn end is introduced into the nozzle hole 53 by the suction action of the pipe 3 shown in the first figure, which is connected to the nozzle hole 53 through a flexible pipe 55.

When the yarn end YP is introduced by the suction force acting on the nozzle hole 53, the yarn end YP is untwisted and each The fibers are unwound so that they are nearly parallel.

It is convenient for further untwisting if the jetting nozzle 56 is provided so as to be inclined in a tangential direction to the inner circumferential surface of the nozzle hole 53 so as to generate a swirling airflow in the direction opposite to the twisting direction of the yarn. Note that the jet nozzle 5
Fluid is supplied to the conduit 5 through communication holes 57 and 58.
9 and further connected via the aforementioned conduit 14.

Note that the yarn control nozzle 21 for untwisting the bobbin side yarn end YB has the same configuration as the yarn control nozzle 20 described above, and has the same function.

In addition, in FIGS. 2 and 3, the thread cutting device 22
and 23 are designed to cut the thread Y by rotating the movable blade 62 with respect to the fixed blade 61 so as to intersect with each other using the pin 60 as a fulcrum.

In addition, when the rod 63 of the movable blade 62 is actuated by a control cam (not shown), a fork-shaped two-pronged lever 64 turns clockwise and counterclockwise around the shaft 65. The portion 66 is operated by moving the pin 67 at the other end of the movable blade 62.

Further, the guide plates 24 and 25 are connected to the thread cutting device 2.
2 and 23, and each guide plate has guide grooves 68 and 69. Also, the thread shifting lever 28,
29 is fixed to the shaft 27, and the rod 70 is actuated by the action of a control cam (not shown) and rotates diagonally clockwise around the shaft 27 to guide the threads YB and YP into the guide groove 6.
Insert at 8,69.

The operation of the yarn splicing device will be described below.

In FIGS. 1, 2, and 3, when the detection device 8, which detects the breakage of the thread during rewinding or the disappearance of the thread layer on the bobbin, detects that the thread is not running, the drum 9 is activated. While the yarn is stopped, a one-turn clutch (not shown) functions, and the splicing operation is performed by various control cams installed on the shaft rotated via the clutch or various control cams interlocked with the shaft.

First, the first and second thread guide suction arms rotate and move from positions 10a and 11a shown in the chain lines shown in the first figure while sucking the thread ends to move the thread ends YB on the bobbin B side and the thread ends on the package P side. The yarn is introduced into the yarn splicing device 12 so as to cross YP. At this time,
The thread end YB on the bobbin B side passes through the guide grooves 71 of the guide plates 16 and 17 and is located in a state where it is attracted to the suction arm 10, and the thread end YB on the package P side
YP is located in a state where it is attracted to the suction arm 11 through the guide groove 72 of the guide plate 18.

As mentioned above, the yarn splicing device main body 26
When in the upper position, the rod 10 shown in the third figure will follow the arrow 7.
By moving back in three directions, the thread shifting lever 28,
29 rotates clockwise around the shaft 27, and the threads YB and YP are guided by the guide grooves 6 of the thread guide plates 24 and 25.
8 and 69, and is also introduced into the yarn splicing hole 39 of the yarn splicing member 19 through the slit 36.

Next, the rod 74 shown in the third figure is operated by a control cam (not shown) to close the slit lever 3.
1 rotates counterclockwise around the shaft 30 to the position shown in FIG. 3, and the elastic member 35 at the tip of the lever comes into contact with the opening of the slit 36, closing the slit.

Next, as shown in FIG. 14, the yarn cutting devices 22 and 23 cut the yarn YB-2 and YP-2 at a predetermined distance from the yarn splicing device main body 19.

The position at which the yarn is cut is related to the length of the seam to be spliced, and is important because it affects the appearance, feel, and binding strength of the spliced seam. position is determined.

Next, as shown in Figure 15, the control nozzles 20, 2
At the same time or in succession, the thread shifting lever 28,
29 in the direction away from the thread Y, that is, the rod 70 shown in the third figure is advanced in the direction of the arrow 75, thereby pivoting counterclockwise about the support shaft 27. Therefore, due to the suction force acting on the nozzle holes 53 and 54, the yarn ends YB and YP are pulled together by the nozzle holes 53 and 5.
As shown in FIG. 13, the fluid is supplied from the pipe 13 to the communication holes 58 and 57 through the conduit 59, and is ejected from the ejection nozzle 56. By applying the fluid jet from the jet nozzle to the yarn ends YB and YP, the twist in the vicinity of the yarn ends, that is, the portion corresponding to the length to be spliced, is brought to a nearly untwisted state, and each fiber is spliced. unravels into a nearly parallel state suitable for

Furthermore, the above-mentioned mutual yarn ends YB and YP are unraveled into a state suitable for splicing, and the nozzle hole 53,
Simultaneously or immediately after the suction action of 54 and the fluid jetting to the jetting nozzle 56 are stopped, as shown in FIG. Other thread pushing levers 76 and 77, which are moved to a position where they come into contact with the stopper 32, and which are then installed on both sides of the thread splicing member 19 and are pivotable around shafts (not shown), are moved in the same way as the thread shifting levers 28 and 29. Move by guiding the thread end in the direction.

By moving the thread shifting levers 28, 29 and the thread pushing levers 76, 77, the nozzle holes 53, 5
The yarn ends YB and YP inserted into the yarn splicing hole 39 are drawn into the yarn splicing hole 39, and the unraveled yarn ends to be spliced are overlapped in the yarn splicing hole 39, that is, in FIG. It is set in the state of Under this condition, compressed fluid is applied to the nozzle 48 of the splicing section 19, and splicing is performed through the process described in FIGS. 11 and 12.

At this time, the opening of the yarn insertion slit 49 in the yarn splicing hole is tightly closed with the rubber member 35, so that when the yarn end is rotated by the jetted fluid, the yarn splicing can be performed reliably without the yarn end jumping out from the slit. Not only can the single fibers be tied to each other's yarn ends without popping out from the yarn ends, but it is also effective in improving binding strength.

When the thread splicing is completed, the thread shifting lever 28,
29. Yarn push lever 7 on both sides of the yarn splicing device main body
6, 77 and the slit closing lever 31 return to their original positions and rewinding is restarted, so that the yarn naturally passes from the yarn splicing hole through the slit 49 due to the winding tension and returns to the normal running path shown in the first figure. .

As described above, in the present invention, the swing lever is provided with a rubber member that blocks the slit opening through which the yarn is inserted into the yarn splicing hole of the yarn splicing device main body, and the slit is closed at least when fluid is ejected into the yarn splicing hole. Since the slit is closed, there is no fear that the yarn ends or single fibers will jump out of the slit, and reliable yarn splicing is possible.

In addition, the yarn end in the yarn splicing hole is
YB and YP can be positioned and regulated at specific positions, and by simply rotating the turning lever 31 to the fixed position, it is possible to position the thread and prevent it from jumping out of the slit in one operation, and it is possible to control the positioning of the thread in a part of the winder. This is also effective in making the provided yarn splicing device more compact.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an automatic winder equipped with a yarn splicing device of the present invention, Fig. 2 is an overall front view of the yarn splicing device, Fig. 3 is a plan view of the same, and Fig. 4 shows a yarn splicing member and a slit. FIG. 5 is a front view showing the relationship between the closing levers; FIG. 6 is an enlarged sectional view showing an example of the arrangement and shape of the yarn splicing hole, yarn insertion slit, and fluid jet nozzle; FIG. 7 is the same. FIG. 8 is an enlarged sectional view showing the same and another example; FIG. 9 is a plan view of the slit closing lever;
0 is a front view of the same, FIG. 11 is an explanatory view showing the mode of yarn splicing, FIG. 12 is an explanatory view showing the yarn end splicing process, FIG. 13 is a cross-sectional plan view of the yarn end control nozzle, and FIG. Figures 1 to 16 are explanatory diagrams showing the yarn splicing operation. 4... Winding unit, 12... Yarn splicing device, 19... Yarn splicing member, 31... Slit closing lever, 35... Elastic member, 36, 40, 44... Yarn insertion slit, 39... Yarn splicing hole, 43, 47 ,48...
Fluid jet nozzle, YB...Bobbin side thread end, YP...Package side thread end.

Claims (1)

[Claims] 1 A cylindrical thread splicing hole into which the thread end on the bobbin side and the thread end on the package cage side to be spliced are inserted into a thread splicing member installed at a position away from the normal thread running path of the automatic winder, and the thread In a yarn splicing device that includes a yarn end insertion slit for guiding and inserting the yarn ends into the splicing hole, and a fluid jetting nozzle for spouting compressed fluid into the splicing hole, both sides of the yarn splicing member are provided. , a pair of pivoting levers are provided that pivot in a direction perpendicular to the axial direction of the yarn splicing hole, and a slit is provided between the pair of pivoting levers to close the slit of the yarn splicing hole in the operating position of the lever. When the closing member is fixed and in the working position where the closing member is in contact with the slit, the side edge of the turning lever is moved so that both yarn ends in the yarn splicing hole are positioned at a specific position by the turning lever. A spun yarn formed in a part of the spun yarn, characterized in that the turning action of the turning lever closes a thread insertion slit in the yarn joining hole and positions the yarn end to be spliced in the yarn joining hole. Yarn splicing device.