JPH05155526A - Auxiliary releasing device for automatic winder - Google Patents

Abstract

PURPOSE:To provide such an auxiliary releasing device for an automatic winder that can regulate an upper side bobbin even in the case of using a cylindrical body which, as it follows thread releasing, becomes overlapping a core tube of a yarn supply bobbin. CONSTITUTION:There are provided a cylindrical body 31 which has a polygonal cross section over an inscribed circle D whose diameter is smaller than the outer diameter of thread layer of a thread supply bobbin 4 but is larger than the outer diameter of a core tube 4b, and also following means 33, 38 and 39 which make the cylindrical body 31 follow releasing of the yarn supply bobbin 4.

Description

Detailed Description of the Invention

[0001]

[Industrial field] For example, an automatic winder that splices a large number of bobbines produced by a ring spinning machine and removes defective parts such as slabs and winds them into one corn or cheese-shaped winding package. Relates to the unwinding assisting device.

[0002]

2. Description of the Related Art In an automatic winder, a large number of winding units are arranged in parallel.
Will be described.

In FIG. 6, a winding unit 1 is fixed in position by a support tube 2 and a duct 3, and a yarn Y drawn from a yarn supplying bobbin 4 positioned and fed to a predetermined position of the unit is a balloon breaker 6 and a predetermined yarn. After passing through a disk or gate type tenser 7 for applying tension, a slab catcher 8 for detecting a defective portion of the yarn, etc., the yarn is wound by a traverse drum 13 into a winding package 14 that rotates. Reference numeral 15 is a yarn joining device, 16 is a suction mouse for guiding the upper yarn on the package side to the yarn joining device 15, and 17 is a relay pipe for guiding the lower yarn on the yarn supplying bobbin side to the yarn joining device 15. A unit has the above-mentioned members, and a large number of such winding units 1 are arranged in parallel to constitute one automatic winder. Further, the yarn feeding bobbins 4 are inserted in the trays 18 which are independent of each other, and the feeding conveyor 1
It is supplied to the winding position A of the winding unit 1 via 1 and the rotary disc 19. The empty bobbin 4'after the winding is completed is discharged to the discharge conveyor 12, and a new yarn supplying bobbin 4 is supplied instead. The yarn end Y1 is inserted into the hollow portion of the head of the yarn supplying bobbin 4 so that the yarn Y of the yarn supplying bobbin 4 at the winding position A is blown up and sucked by the relay pipe 17.

The productivity of the winding unit 1 described above largely depends on the winding speed. However, in the conventional automatic winder, the practical winding speed was around 1000 m / min. The reason for this is that as the winding speed increases, the unwinding tension also increases, and especially when the remaining unwinding amount called the third ball becomes 1/3, the unwinding tension increases sharply and the yarn breaks due to the tension. Is generated.

It is empirically known that the increase in the unwinding tension depends on the state of unwinding from the yarn supplying bobbin.
Therefore, as shown in FIG. 6, the balloon of the yarn unwound from the yarn supplying bobbin 4 is limited by the tubular body 6, and the balloon is kept in an appropriate amount so as not to spread too much. It is also proposed that the tubular body is not fixed but covers the core tube of the yarn feeding bobbin following the release.

[0006]

However, the cylindrical body 6
If the core tube of the yarn supplying bobbin 4 is covered following the release of the above, the distance from the upper end of the tubular body 6 to the guide plate 10 becomes long, and the upper balloon in this portion becomes unregulated. I had.

The present invention has been made in view of the above problems, and an object of the present invention is to use a cylindrical body which covers the core tube of the yarn supplying bobbin 4 following release. Even so, the present invention aims to provide an unwinding assisting device for an automatic winder capable of regulating the upper balloon.

[0008]

In order to achieve the above object, the unwinding assisting device in the present invention has a polygonal cross section of an inscribed circle smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube. It has a tubular body that covers the core tube and a follow-up unit that follows the unwinding of the yarn feeding bobbin.

[0009]

The yarn to be released is fed while rotating in a spiral shape while coming into contact with the inner surface of the cylinder, but since the cylinder has a polygonal cross section, the rotation is discontinuous and the formation of a steady knot is prevented. The shape of the upper balloon collapses and becomes smaller.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an unwinding assisting device of the present invention.

In FIG. 1, an unwinding assisting device 30 includes a cylindrical body 31, a sensor 33 as a follower mechanism, a cylinder 38,
The controller 40 is a main member.

The cylindrical body 31 has a hexagonal shape with upper and lower openings,
The diameter of the inscribed circle is D. A first arm 31a having an elevating block 35 attached thereto is fixedly attached to the side surface of the cylindrical body 31. The elevating block 35 is vertically slidably inserted into a rod 37 hung from a fixed block 36, and is connected to a piston rod 38a of a cylinder 38 erected on the fixed block 36. The tubular body 31 can be raised and lowered according to expansion and contraction. This tubular body 31 is used for the chess portion 4 of the yarn supplying bobbin 4.
The core L4b of the yarn supplying bobbin 4 is sequentially covered so that the distance L1 from a is substantially constant, and the core L4b of the yarn supplying bobbin 4 is covered. Then, by appropriately maintaining the spread of the balloon of the yarn unwound from the chess portion 4a, the unwinding angle is increased, and the role of suppressing the occurrence of sluffing and fluff is fulfilled. In order to sufficiently fulfill the role of the tubular body 31, the relationship between the size of the inscribed circle D of the tubular body 31 that controls the balloon of the yarn unwound from the chess portion 4a and the yarn feeding bobbin 4 is important. .. Inscribed circle D of cylinder 31
Needs to be smaller than the outer diameter of the yarn layer of the yarn supplying bobbin 4 and larger than the outer diameter of the core tube 4b, and the inner diameter D of the tubular body 31 should be as close as possible to the outer diameter of the core tube 4b. At the same time as increasing the release angle at the chess part, at the same time as the yarn comes into contact with the inner surface of the hexagonal cylindrical body 31 and rotates in a spiral shape and is fed out, a steady knot formation is prevented, It also serves to make the balloon above the body 31 smaller.

Next, the sensor 33, the cylinder 38, and the controller 40 as the tracking mechanism will be described. The sensor 33 attached to the second arm 31b of the tubular body 31 detects the chess portion 4a of the yarn feeding bobbin 4, and the controller 40 receiving the input of the sensor 33 actuates the switching valve 39, and the piston rod 38a of the cylinder 38. Gradually expands, and the tubular body 31
The distance L1 between the chess part 4a and the chess part 4a can be kept substantially constant. A diffuse reflection sensor is used as the sensor 33. As shown in the figure, as the unwinding of the chess portion 4a progresses, the distance from the sensor 33 to the chess portion 4a increases, and eventually the sensor 33 issues an OFF signal. The controller 40 receiving this OFF signal extends the piston rod 38a of the cylinder 38 via the switching valve 39. Then, the distance from the sensor 33 to the chess part 4a becomes shorter, and the sensor 33 eventually emits an ON signal. The controller 40 receiving this ON signal causes the cylinder 38 to pass through the switching valve 39.
Stop the piston rod 38a. By repeating this, the cylindrical body 31 descends sequentially with the unwinding.

FIG. 2 is a view showing another preferable cylindrical body 32. The cylindrical body 32 is composed of a lower short cylinder 32a and an upper long hexagonal cylinder 32b, and the inner diameter D of the short cylinder 32a and the inscribed circle D of the hexagonal cylinder 32a coincide with each other. .. When the lower end of the cylindrical body 32 is formed into a cylinder, the balloon of the yarn unwound from the chess portion 4a becomes stable. And the cylindrical body 3
The formation of knots of the balloon above 2 is prevented by the hexagonal tube 32b. Further, the cylindrical body 31 of FIG. 1 is not limited to the hexagonal cross section,
The cross section may be at least quadrangular, and at most decagonal. If it becomes a triangle, the release from the chess part may be disturbed, and if it exceeds the decagon, the effect of preventing the formation of the knot becomes less.

Next, the operation of the unwinding assisting device 30 of FIG. 1 will be described with reference to FIG. The figures (a) to (d) show the cylindrical body 3.
It is a figure which shows how 1 follows unrolling. In FIG. 5A, the solid line cylinder 31 is in the retracted position. In this retracted position, the lower end of the tubular body 31 is above the core tube 4b, and a new yarn supply bobbin is supplied following the empty bobbin discharge. At the start of winding after splicing, the lower end of the tubular body 31 is lowered to an operating state in which it covers the core tube 4b. The figure (b) shows the state of the quintuplet, in which the tubular body 31 descends following the release. In particular, since the cylindrical body 31 is sequentially lowered so as to follow the unwinding of the chess portion 4a, the unwinding angle θ of the yarn unwound from the chess portion 4a is kept large, and the unwinding of the yarn remaining on the yarn feeding bobbin is As a result of less rubbing between the yarns, the occurrence of sluffing and fluff is suppressed. The figure (c) has shown the state of the third ball. In particular, the unwinding tension tends to increase sharply after the third ball, which is caused by a large balloon such as a two-dot chain line appearing in the yarn unwound from below the chess portion 4a and from above the chess portion 4a. This is due to the alternating appearance of small balloons appearing in the unwound yarn. However, in a yarn in which the cylindrical body has a hexagonal cross section and is wound while rotating in a spiral shape while being in contact with the inner surface of the cylindrical body, the rotation becomes discontinuous, and a steady knot formation is prevented. As a result, the shape of the upper balloon is collapsed, alternate expression of large and small balloons is suppressed, the increase in the release tension is reduced, and the fluctuation range thereof is also reduced. Further, after the third coin, the shape of the chess portion 4a begins to gradually collapse, and even if the cylindrical body 31 is lowered further, there is no difference in the effect of suppressing sluffing and fluff. Therefore, as shown in FIG.
In the unwinding after the third ball, the tubular body 31 does not follow the unwinding and remains at the predetermined position.

FIG. 4 is a perspective view of another unwinding assisting device.
The difference from FIG. 1 is that an opening / closing diaphragm mechanism 51 is attached to the outlet of the cylindrical body 31. This diaphragm mechanism 51
The structure will be described with reference to FIG. V-shaped lever 51a,
51b is supported by a fulcrum A so as to be horizontally rotatable, and is normally closed by a spring 54. V-shaped levers 51a, 51
drive member 52 arranged so as to face the protruding end on the opposite side of b.
When the tip 52a of the lever advances, the doglegged levers 51a, 5
1b opens in a two-dot chain line and can be located outside the cylinder. The substantially circular yarn path regulation space 53 formed by closing the dog-legged levers 51a and 51b is the core tube 4b.
It is a space that fits within the outer diameter of the top of the. Returning to FIG. 4, the diaphragm mechanism 51 descends as the cylindrical body 31 descends sequentially. Then, in the state where the cylindrical body 31 has stopped at the third ball, the diaphragm mechanism 51 is positioned directly above the core tube 4b. This squeezing mechanism 51 regulates the yarn path,
Further, it serves to prevent a large fluctuation of the balloon reaching the guide plate 10 and narrow the fluctuation range of the yarn tension. In order to sufficiently fulfill the role of the throttle mechanism 51, the size of the throttle portion of the throttle mechanism 51 needs to be smaller than the outer diameter of the top portion of the core tube 4b. The upper balloon is further reduced by the synergistic effect of preventing the fluctuation of the balloon by the squeezing mechanism 51 and preventing the formation of the node by the tubular body having the hexagonal cross section.

[0017]

The unwinding assisting device according to the present invention has a polygonal cross section of an inscribed circle smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core tube, and a cylindrical body covering the core tube. A follower is provided to follow the unwinding of the yarn feeding bobbin, and the yarn fed out while rotating in a spiral while contacting the inner surface of the tubular body is disturbed on the inner surface of the polygon, forming a steady knot. Is blocked and the shape of the upper balloon collapses and becomes smaller,
In particular, it is possible to suppress the increase in the release tension and the fluctuation range after the third ball. As a result, the practical winding speed of the automatic winder can be increased as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a perspective view of an unwinding assisting device of the present invention.

FIG. 2 is a view showing another cylindrical body.

FIG. 3 is an operation diagram of the unwinding assisting device of the present invention.

FIG. 4 is a perspective view of another unwinding assisting device of the present invention.

FIG. 5 is a top view of a diaphragm mechanism.

FIG. 6 is a device layout view of a winding unit.

[Explanation of Codes] 4 yarn feeding bobbin 4b core tube 31 cylinder with hexagonal cross section 38 cylinder (following mechanism)

Claims (1)

[Claims] 1. A cylindrical body having a polygonal cross section of an inscribed circle smaller than the outer diameter of the yarn layer of the yarn supplying bobbin and larger than the outer diameter of the core pipe, and a cylindrical body covering the core pipe, and the unwinding of the cylindrical body of the yarn supplying bobbin. An unwinding assisting device for an automatic winder, which is equipped with a following means for following.