JPH0375476B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing abnormal yarn splicing in an automatic winder.

[Conventional technology]

For yarn splicing in automatic winders, there are known mechanical yarn splicing devices such as fisherman knotter and weaver knotter, which splice yarns mechanically, and fluid splicing devices that splice yarn using the action of compressed fluid. The yarn placed in the yarn path and wound during normal rewinding is pulled out from the yarn feeding bobbin, passes over the yarn splicing device while being checked by a detection device, and then is passed over the yarn splicing device by a rotationally driven traversing drum. It is wound up in a package. At this time, if the detection device installed in the yarn path detects yarn breakage or yarn defects such as slubs, a yarn splicing command is immediately issued in the case of yarn breakage, and the yarn splicing device will splice the yarn. In the case of slab detection, after the yarn is cut by the cutter, a yarn splicing command is issued and the yarn splicing is performed by the yarn splicing device.

An example of a yarn splicing device in which each winding unit is provided with the yarn splicing device is shown in FIG. That is, the yarn Y1 pulled out from the yarn supply bobbin B passes through a detection device 8 that detects yarn defects such as slabs,
The yarn is wound around a package P which is rotated by a traversing drum 9, and a yarn splicing device 12 is disposed between the detection device 8 and the winding package P.

[Problem that the invention seeks to solve]

In such a device, when piecing yarns, the 12th
As shown in the figure, the thread YP pulled out from the package P side is guided to the thread splicing member 101 while being sucked and held by the suction mouth 11, and the thread YB on the bobbin B side is gripped by the relay pipe 10. and guided to the yarn splicing member 101. Next, thread splicing member 1
The yarn YP2 connected to the suction mouth 11 and the yarn YB2 connected to the relay pipe 10 are cut by cutters 106 and 107 on both the upper and lower sides of 01, and the tip end of the yarn is overlapped in the yarn splicing hole 37 of the yarn splicing device member 101. The yarns are joined together and spliced by the action of compressed fluid.

However, if the upper cutter 107 operates normally but the lower cutter 106 that cuts the yarn on the package P side fails for some reason and the yarn is not cut, the following problem occurs.
That is, the thread YP2 on the package side is spliced with the thread YB on the bobbin side, which is connected to the suction mouth 11. In the case of fluid splicing, the yarn will be spliced if the splicing operation is performed even under the above conditions, so the 13th
When splicing is performed in the state shown in the figure, and the package cage rotates as winding is restarted, the yarn YP2 connected to the suction mouth 11 is pulled out from the suction mouth 11 and wound into the package cage. Furthermore, even if a yarn defect detection device such as a slab catcher is disposed between the yarn splicing device 101 and the package P in order to prevent the double yarn from being entangled, both yarns of the double yarn may be A double thread, that is, an abnormal splicing, can only be confirmed after the thread has passed through the inspection device.In this case, the thread that was connected to the suction mouth becomes a free end, and is located outside the detection groove of the detection device. There is a high possibility that the thread will pass through the thread, resulting in a double thread detection error.

The present invention aims to solve the above problems.

[Means for solving problems]

In the present invention, the yarn pulled out from the winding package side is guided to the yarn splicing member while being sucked and held by the suction mouth, and the yarn on the yarn supply bobbin side is gripped by the relay pipe, and the yarn is guided to the yarn splicing member by the suction mouth. guided to
Next, the cutters on both the upper and lower sides of the yarn splicing member cut the yarn connected to the yarn splicing member and the suction mouth, and the yarn connected to the yarn splicing member and the relay pipe, and each yarn is inserted into the yarn splicing hole of the yarn splicing member. In a yarn splicing device in which end tip portions are overlapped and spliced by the action of compressed air, if the yarn splicing member and the suction mouth fail to cut the yarn, the yarn between the yarn splicing member and the suction mouth is The clamping position is such that the distance between the package and the seam is greater than the distance between the seam and the clamping point, and the drum is started in the clamped state.

[Effect]

For example, in the case of FIG. 13, by clamping and fixing a part of the existing yarn path YP2 branched from the seam J, that is, by clamping the yarn between the yarn splicing member 101 and the suction mouth 11, As the thread rotates, the thread Y1 tries to run, but since the thread path YP2 is clamped, the thread between the clamp point and the package cage is torn and cut.
As a result, there appears to be a yarn splicing error, and the yarn splicing operation is performed again.

〔Example〕

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

FIG. 1 shows a schematic diagram of an automatic winder to which the present invention is applied, in which each side frame 1
A shaft or pipe 2 and a suction pipe 3 are installed between them, and a winding unit 4 is connected to the shaft 2.
While the automatic winder is in operation, the unit 4 is also placed on the pipe 3 and fixed as appropriate. Incidentally, the pipe 3 is connected to a blower (not shown), and a suction air current is constantly applied to the pipe 3.

To rewind the yarn from the bobbin B to the package P in the winding unit 4, the yarn Y1 from the bobbin B on the peg 5 passes through the guide 6, applies appropriate tension to the yarn with the tensor 7, and detects yarn unevenness such as slabs. The yarn is wound up onto a package P rotated by a traversing drum 9 through a detection device 8 which also serves as a cutting and yarn running detection.

At this time, 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 while winding is stopped, the relay pipe 10 is activated. and thread on the bobbin B side.
The suction mouse 11 guides the yarn YP on the package P side to the yarn splicing device 12 installed at a position away from the normal yarn travel path Y1, and the yarn splicing device 1
After splicing in step 2, rewinding of the yarn continues. Note that the relay pipe 10 and suction mouth 11 are connected to a pipe 3 that produces suction airflow. Furthermore, since fluid such as compressed air is used in the yarn splicing device, a conduit 14 is connected between the pipe 13 and the yarn splicing box 15, which are in a separate route.
compressed fluid is supplied.

Detailed views of the entire yarn splicing device 12 described above are shown in FIGS. 2 and 3. That is, during normal rewinding, the thread Y is transferred from the bobbin B to the detection device 8.
Then, a route is taken to pass above the yarn splicing device 12 and reach the package P via a fixed guide 16 installed at one end of the detection device 8 and rotating guides 17 and 18 inserted on both sides of the detection device 8. There is.

The yarn splicing device 12 basically includes a yarn splicing member 10.
1. Yarn presser 102, untwisting nozzle 103, 10
4, thread shifting lever 105, thread cutting device 106,1
07 and yarn support devices 108, 109, the suction ports at the tips of the relay pipe 10 and the suction mouth 11 pivot above the yarn splicing device 12 so as to intersect with each other, and are connected to the bobbin B side and the package P side. The yarn ends YB and YP are sucked and moved to the outside of the yarn splicing device 12 and stopped.

In addition, the above-mentioned relay pipe 10 and suction mouth 1
The operations No. 1 are not performed at the same time, but are performed with some time lag. That is, first the package P
Almost at the same time that the yarn end YP on the side rotates to the outside of the yarn splicing device 12 by the suction mouth 11 and stops, the yarn support device 10 on the package cage P side
9 is moved counterclockwise to the chain line position 20 by means of a control cam (not shown) or the like, as shown in the fourth figure.
The support block 21 is rotated to -1 and fixed in position.
It comes into contact with and stops. At this time, the thread Y is at the turning lever 2.
It moves while being supported by the hook portion 20a of the holder 0, and is held between the support block 21 and the turning lever 20.

On the other hand, while the pivot lever 20 is operating, the thread Y located on the fixed guide 16 and the pivot guides 17, 18 is guided into the guide groove along the slopes 16a, 17a, 18a of the guides 16, 17, 18. A detection device 8 inserted into the guide groove 19 and installed at the same position as the guide groove 19 confirms the presence or absence of the yarn Y, and detects whether two or more yarn ends YP are accidentally suctioned by the suction mouth 11. After checking the thread Y, the rotating guides 17 and 18
is rotated counterclockwise around the spindle 22 as shown in the fifth figure by a control cam (not shown), and the yarn end is
YP is removed from the detection device 8 and the rotating guide 17,
18 into the escape grooves 17b and 18b.

Furthermore, almost at the same time as the pivoting guides 17 and 18 rotate, the yarn end YB on the bobbin B side is sucked by the relay pipe 10, rotates in the opposite direction to the suction mouth 11, and moves to the outside of the yarn splicing device 12. and stop. Almost at the same time as the relay pipe 10 stops rotating, the support plate 2 of the thread support device 108
3a is connected to the guide plate 2 by a control cam (not shown) or the like.
4, the support block 23 moves in the same direction as the turning lever 20 while supporting the thread Y, and is fixed at a fixed position.
b, and the thread Y is held between the support plate 23a and the support block 23b. At this time, Ito YB is the fifth
As shown in the figure, the yarn is hung on hook portions 17c, 18c near the tips of the guides by the rotation of the swiveling guides 17, 18, and a check by the detection device 8 is performed after the yarn splicing is completed.

A yarn splicing member 10 is located approximately in the center of the yarn splicing device 12.
1 is installed, and thread guide pins 25, 26 and a thread presser 10 are installed on both sides of the thread splicing member 101.
2. Untwisting nozzles 103, 104 and yarn guide 2
7, 28, and further thread cutting devices 106, 107 and fork guides 29, 30 are arranged in this order, and on the side of the thread splicing member 101 there is a spindle 31 and levers 32, 33 that pivot around the spindle 31 as a fulcrum. A thread shifting lever 105 consisting of is installed. The yarn shifting lever 105 is operated by a detection device 8 that detects a slab of yarn Y and cuts it with a cutting device (not shown), and connects the relay pipe 1
0, the suction mouse 11 operates and the ends of each other's threads are
After guiding YP and YB to the outside of the yarn splicing device 12, the yarn ends YP and YB are guided to the outside of the yarn splicing device 12, and then the yarn ends YP and YB are guided in the direction of the yarn splicing device 12. The rotation range of the thread shifting lever 105 comes into contact with a stopper 34 which is installed between the fork guide 29 and the thread supporting member 108 and has a substantially V-shaped cross section. Therefore, stopper 3
By adjusting the position of 4, the rotation range of the thread shifting lever 108 can also be adjusted.

Furthermore, in FIGS. 2, 3, and 7, a part of the fixed guide 16 is used as a clamping surface 16c for the package side thread, and the clamping surface 16c and the thread gripping surface 110c of the clamp lever 110 A clamp fixing device 112 for miscut threads on the package side is configured. That is, the clamp lever 110 is rotatably supported around the shaft 31,
It is biased clockwise in FIG. 3 by a spring 113 wound around the shaft 31. A clamp lever 114 is fixed to the middle part of the clamp lever 110 and engages with the side surface 18c of the pivotable guide 18 to follow the movement of the guide 18. Note that the above-mentioned clamping mechanism is just one example, and any mechanism that can clamp any position between the suction mouth 11 and the yarn splicing member 101 in FIG. 2 may be used. Preferably, it is as close to the thread splicing member 101 as possible. That is,
In FIG. 13, when the drum rotates with the yarn clamped between the yarn splicing member 101 and the suction mouth 11, the yarn is forcibly cut, but the cut point is at the normal position between the package P and the suction mouth 101. This is because it is necessary to have a thread portion of 1 to prevent the double thread from being entangled.

The operation of the yarn splicing device will be explained with reference to the timing chart in FIG. 11 and FIGS. 1 to 6.

In FIG. 1, when a detection device 8 detects thread breakage during rewinding or the disappearance of the thread layer on the bobbin and detects that the thread is not running, the drum 9 stops, while a one-turn clutch (not shown) detects that the thread is not running. The yarn splicing operation is performed by various control cams installed on a shaft rotated through the clutch or various control cams interlocked with the shaft.

First, relay pipe 10, suction mouth 11
rotates from the chain line positions 10a and 11a shown in the first figure while sucking the yarn ends, and moves above the yarn splicing device 12 so that the yarn YB on the bobbin B side and the yarn YP on the package P side intersect with each other. The yarn splicing device 12 is guided to a position outside the yarn splicing device 12 and stopped.

Note that the operations of the relay pipe 10 and the suction mouth 11 are not performed simultaneously, and as described above, the yarn YP on the package P side is first sucked by the suction mouth 11 and rotated to a position outside the yarn splicing device 12. It moves and stops, and after a predetermined period of time, the yarn YB on the bobbin B side is sucked into the relay pipe 10, rotates to a position outside the yarn splicing device 12, and stops.

As shown in FIGS. 4 and 5, within a predetermined period of time after the suction mouth 11 is activated and until the relay pipe 10 starts to operate, the turning lever 20 of the yarn support device 109 on the package P side is activated to move the yarn YP. A fixed guide 16 and a rotating guide 17, 18 are sandwiched between the rotating lever 20 and the support block 21 (FIG. 11D) and are installed near the detection device 8.
The thread YP is introduced into the guide groove 19 of the detection device 8.
After the check is carried out, the swivel guide 17,1
8 is at the chain line position 17-1, 18- with the support shaft 22 as the fulcrum.
1 and remove the thread YP from the detection device 8.
It is inserted into the relief grooves 17b and 18b (FIG. 11C).

Further, the relay pipe 10 sucks the yarn YB on the bobbin B side, rotates to a position outside the yarn splicing device 12, and stops. At this time, the yarn YB passes through the hook portions 17c and 18c of the above-mentioned rotating guides 17 and 18, and is held between the yarn support plate 23a and the support block 23b of the yarn support device 108 as shown in FIG. 6 (FIG. 11E). ) Therefore, the yarn YB on the bobbin B side is not checked by the detection device 8 before the yarn splicing, but is checked after the yarn splicing is completed.

When the operations of the relay pipe 10 and the suction mouth 11 are completed, the levers 32 and 33 of the thread shifting lever 105 shown in FIGS. 2 to 6 rotate around the support shaft 31 (FIG. 11F ), the yarns YB and YP on both sides are guided separately to the respective guide grooves 59 and 60 of the fork guides 29 and 30, and are inserted into the yarn splicing hole 37 of the yarn splicing member 101 through the slit 38.

Next, position cuts YB-2 and YP-2 are performed by the cutting devices 106 and 107 at a predetermined distance from the yarn support devices 108 and 109 as shown in FIG. 6 (FIG. 11G).

The position at which the yarn is cut is related to the length of the spliced seam and affects the appearance, texture and binding strength of the spliced seam. The position where the yarn is cut differs depending on the yarn count.

That is, in FIG. 8, the yarns YB and YP on both sides are held between the yarn support devices 108 and 109, the yarn shifting lever 105 is operated, and the rod 61 shown in FIG. Yarn cutting is performed in a state in which the levers 32 and 33 are moved in the A direction and turned clockwise around the support shaft 31 as a fulcrum. Note that the thread shifting lever 105 and the cutting device 10
6, 107, the thread presser device 102 operates the rod 49 (in the direction of arrow 70) as shown in FIG.
It is located in a state where it is rotated clockwise about the support shaft 46 as a fulcrum.

Next, as shown in FIG. 9, the untwisting nozzle 103,
When the yarn ends YB1 and YP1 are suctioned by the yarn ends YB1 and YP1 by the yarn ends YB1 and YP1, the rod 61 is actuated in the direction in which the yarn shifting lever 105 is moved away from the yarn at the same time or in succession, that is, as shown in FIG. The thread Y is rotated counterclockwise around the spindle 31 by
More disengagement. At this time, the above thread ends YB1, YP1
The yarn is drawn into the nozzles 103 and 104 by the suction action, and is untwisted by the compressed fluid jetted from the jet nozzle 51 to a state suitable for splicing. (Fig. 11H) That is, after the thread is cut, the thread shifting lever 105 moves in the direction away from the thread Y (Fig. 11F).
1) As a result, both yarn ends YP1 and YB1 are pulled into the nozzle hole by a sufficient length and untwisted.

Note that it is preferable that the suction timing of the untwisting nozzles 103 and 104 starts immediately before the yarn is cut by the cutting devices 106 and 107. That is, thread Y
When the yarn is cut, tension is applied to the yarn by the suction action of the suctions 10 and 11, so the yarn ends YP1 and YB1 are scattered and separated from the untwisting nozzles 103 and 104 positions, and the yarn ends are untwisted. nozzle 10
3, 104 may not perform the suction action on the yarn ends YB1, YP1. Therefore, basically, the untwisting nozzle 1 is operated at the same time as or before and after cutting the yarn.
Although it is also possible to apply 03 and 104, it is preferable to apply it immediately before the yarn is cut as described above.

Further, fluid is supplied to the untwisting nozzles 103 and 104 by switching valves by operating a solenoid (not shown).

Furthermore, when the yarn ends YB1, YP1 are untwisted by the untwisting nozzles 103, 104 to a state suitable for splicing, and the suction action of the untwisting nozzles 103, 104 is stopped, a second As shown in Figure 10, turn the thread guide lever 1 again.
05 operates and guides the yarn ends YB1 and YP1 to each other while one lever 32 turns to a position where it abuts against the stopper 34 (FIG. 11 F2), and the yarn holding device 102 operates to remove the untwisting nozzle 1.
Yarn end YB inserted into the nozzle hole of 03,104
1 and YP1 are drawn into the yarn splicing hole 37 of the yarn splicing member 101, and the yarn end portions to be spliced are set in an overlapping state. At this time, the length of the seam to be spliced is determined by the turning distance of the yarn shifting lever 105 and the yarn holding device 102.

Therefore, the turning distance of the thread shifting lever 105 and the thread holding device 102 is adjusted depending on the thread count.

Note that the yarn holding plates 48a and 48b press the yarn at the yarn ends YB1 and YP1, which are overlapped with each other.
The vicinity of the tip is preferable from the viewpoint of stability of yarn splicing, but there is no need to specifically limit it.

Furthermore, with the yarn ends YB1 and YP1 set in the splicing hole 37, splicing is performed by the action of compressed fluid jetted from the jet nozzle hole 39 (FIG. 11I). When the yarn splicing drawing is completed, the yarn shifting lever 105 and the yarn pressing device 102 are separated from the yarn Y, and the drum start (K in FIG. 11) causes the yarn Y to pass through the slit 38 of the yarn splicing member 101 to the yarn splicing member. The rewind state returns to the normal rewind state described above.

The above is one cycle of the yarn splicing operation. Next, a case will be described in which the yarn end YP is not cut by the yarn cutting device 106. In the state shown in Fig. 5, that is, the thread end YP on the package cage side
The thread cutting device 106 operates while the thread is inside.
When I make a mistake in thread cutting, I still use suction mouse 11.
The yarn between the package P and the package P remains connected, and after the yarn splicing operation described above is performed, the rotation guide 1
7 and 18 return to their original positions. At this time, the thread YP is located between the clamp surface 16c of the fixed guide 16 and the clamp surface 110c of the clamp lever 110 in FIG. follows, and the thread YP2 is clamped and fixed between the guide 16c and the lever 110c. (Fig. 11M) Next, the package P rotates due to the start of the drum 9 (Fig. 11K), but the thread YP2 connected to the suction mouth 11 does not run and is clamped, so the package P and The yarn is forcibly cut between the clamp fixing points (Q in FIG. 2), resulting in a yarn splicing error, and the yarn splicing operation is repeated again. That is, in FIG. 2, among the threads connected between the package P and the suction mouth 11,
Let L be the distance between the package P and the joint position J formed by the thread splicing member 101, and let the distance between the above position J and the above clamp fixing point (Q in Fig. 2) be,
As mentioned above, L≫ is desirable, but there are certain mechanical constraints. For example, if L = 6:1, the probability that the thread will be cut within the distance L is 85.7.
%.

〔Effect of the invention〕

According to the method of the present invention, it is possible to prevent the double yarn after splicing, which is caused by the yarn on the package side not being cut, from being wound into the package.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing an example of a winding unit to which the present invention is applied, Fig. 2 is a front view showing an embodiment of a yarn splicing device implementing the method of the present invention, and Fig. 3 is the same plane. Figures 4 and 5 are plan views showing the operating state of the device, Figure 6 is a front view showing the state in which the thread end is inserted and set in the device, and Figure 7 is the space between the package cage and the suction mouth. Plan view of a device for clamping a series of uncut threads, Figures 8 to 1
Fig. 0 is a schematic diagram explaining the thread splicing operation process, Fig. 11 is a time chart of the same, Fig. 12 is a schematic diagram showing the state in which the thread is pulled out on the package side and bobbin side.
FIG. 13 is a schematic diagram illustrating double yarn after yarn splicing that occurs in the case of a yarn cutting error on the package side. 4... winding unit, 9... traverse drum, 11... suction mouth, 12... thread splicing device, 16... fixed guide, 110... clamp lever, 112... clamp fixing device, YP...
...Package side thread end, YP2... Miscut thread end.

Claims (1)

[Claims] The yarn pulled out from the winding package side is guided to the yarn splicing member while being sucked and held by the suction mouth, and the yarn on the yarn supply bobbin side is gripped by the relay pipe and the yarn is The yarn is guided to the splicing member, and then the cutters on both the upper and lower sides of the splicing member cut the yarn connected to the splicing member and the suction mouth, and the yarn connected to the splicing member and the relay pipe. In a yarn splicing device where the tips of each yarn end are overlapped in the splicing hole and spliced by the action of compressed air, if the yarn splicing member and the suction mouth fail to cut the yarn, the yarn splicing member and Clamp a part of the thread between the suction mouths, that is, the clamping position is such that the distance between the package cage and the seam is greater than the distance between the seam and the clamping point, and the drum starts in the clamped state. A method for preventing abnormal yarn splicing in an automatic winder, characterized by: