JPH05338913A - Removing method for lap winding thread filament at end of bobbin - Google Patents

Abstract

PURPOSE:To surely and quickly remove bunch winding formed at the end of a bobbin without leaving thread filaments in the slit of a thread guard. CONSTITUTION:Lap winding thread filaments Y at a position where no slit groove G is engraved, are cut off by a cutter 31, after thread filaments Ya and Yb which are cut off, have been held by a sucking unit 11, the thread filaments Ya and Yb which are being held by suction, are held by grippers 23, so that the lap winding thread filaments Y are removed by moving the thread filaments along the circumferential direction of a bobbin B while the grippers 23 are being rotated in the direction that the thread filaments are twisted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of removing a lap wound yarn which occurs when a transfer tail is formed at the end of a bobbin, particularly at the end of a paper tube.

[0002]

2. Description of the Related Art In recent years, when synthetic fiber yarns such as polyamide and polyester fibers are processed by a draw twisting machine, a draw false twisting machine, etc., a yarn end at the start of winding and a yarn end at the end of winding between raw yarn bobbins. A so-called transfer tail is formed at the end of the bobbin outside the traverse area at the beginning of winding in order to combine the above and the continuous processing.
36233, JP-A-58-119553).

The yarn package thus wound up can be easily treated with transfer tails.
The bunch winding (lap winding) or pigtail formed on the bobbin end leaving the transfer tail of a certain length is peeled off, and the thread end after peeling off is attached to the bobbin end with tape, label, seal (paper), etc. It is fixed (Japanese Patent Application No. 1-22)
6668, Japanese Patent Application No. 1-321264).

Conventionally, such a yarn end stripping process has been performed manually, but such a processing work requires a large number of people and a lot of time, and it is difficult to stably obtain a product having a constant quality or a product. There was a problem.

For this reason, mechanization and automation have been attempted, and as described in JP-A-60-12570 and JP-A-2-43180, bunch winding at the end of the bobbin by a scratching hand provided on the robot. It has been proposed to scrape off the bunch winding with an electric heater and peel it off in the circumferential direction of the bobbin.

However, under the present circumstances, such a conventional method is not yet sufficiently satisfactory.

With the recent increase in the number of automatic winder systems, in the case of a bobbin provided with a thread-hanging slit at the end of the bobbin, the inside of the slit has a saw-like blade for the purpose of improving the thread catching property. There are many bobbins that have improved the thread gripping power.

According to this method, in the case of the bobbin, since the thread is bitten and gripped by the saw blade-like slit, the thread gripping force of about 150 g in the past has been increased to 250 g. With the bobbin, the thread that digs into the slit is difficult to remove not only by hand but also by the mechanical method described above. When unwinding, it has a drawback that it is caught on the yarn remaining in the slit and unwinding is unsatisfactory.

Further, when the bobbin is tried to be reused, if a thread is left in the conventional thread-holding slit, which is conventionally used, the thread-holding force of the slit is reduced in the next use. And fail to thread.

As described above, not only the product quality is not sufficient, but it cannot be reused.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can reliably and quickly remove a bunch winding formed at the end of a bobbin without leaving a yarn in the yarn hooking slit. The purpose is.

[0012]

That is, according to the present invention, a transfer groove is formed in the slit groove formed in the bobbin end portion in the circumferential direction, and after the yarn is switched, the yarn at the beginning of winding is gripped and overlapped. When removing the lapped wound yarn from the wound yarn package formed by forming the wrapping yarn, the laid wound yarn at a position where the slit groove is not formed is cut, and the yarn end of the cut yarn is suction-held. After that, the yarn being sucked and held is grasped by a grasping tool, and is removed in the circumferential direction of the bobbin while rotating the grasping tool in a direction of twisting the yarn, and the bobbin end overlapped wound yarn is characterized. Is the removal method.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic overall view of an apparatus suitable for carrying out the present invention, and FIGS. 2 (a) to 2 (f) are operation explanatory views of FIG.
2A is a partial plan view of the front end portion of the bobbin, and FIG.
(B)-(f) is a partial front view of the bobbin front end part.

In the figure, reference numeral 10 is a frame of the apparatus main body according to the present invention. The frame 10 has a seal supply device 40 for fixing the yarn end of the transfer tail to the bobbin end and the cutting yarn end of the overlapping wound yarn at the bobbin end. A yarn gripping device 20 for gripping the yarn, a cutting device 30 including a cutting cutter, and the like are provided.

A conveyor 1 for transporting a transfer tray 2 for the yarn package P is arranged in front of the frame 10, and the tray 2 holding the yarn package P is carried by the conveyor 1. However, the positioning stopper 4 provided at a predetermined position in front of the frame 10 is operated to accurately position and stop.

At the left and right positions on the front surface corresponding to the yarn package P at the stop position, two yarn suction devices 11 are arranged so as to face each other. The suction device 11 is attached via a bracket 12 and a plate 13 to an arm (not shown) that can be moved forward and backward by a moving means such as a fluid pressure cylinder or a motor in a direction along the end surface of the package P.

The yarn gripping device 20 includes a motor 24 and a motor 2 which are fixedly mounted on an arm 27 which is movable in the front-back and up-down directions.
A box 26 that rotates by being connected to the drive shaft 25 of No. 4 (directly connected for the sake of description, but it is usually rotated by a belt or the like via a rotary actuator), and a box provided inside the box 26. Not a fluid pressure cylinder or two movers that open and close like scissors by electromagnetic force (one may be fixed) 21,
It is configured to include a gripper 23 and the like for gripping a yarn consisting of 22.

The arm 27 is reciprocally moved toward the conveyor fixed to the frame 10 (perpendicular to the moving direction of the conveyor). The fluid pressure cylinders 28, 29 are attached via a cylinder 29, and the arm 27 is moved in the vertical and forward and backward directions by these fluid pressure cylinders 28, 29 so that the gripping device 20 (gripper 23) is moved in the above-described direction.

The cutter 31 of the yarn cutting device 30 has a cutting edge 3
2 is disposed so as to project in a direction perpendicular to the moving direction of the conveyor (package) (electrothermal fusing type is used, but blade type can also be used. These cutters are sometimes used for bobbins. Since it may damage the surface, it is more preferable to use a cutting device composed of a hot air heater as will be described later.), And a cylinder device 33 described later is provided so as to be movable in up, down, left and right directions.

The cylinder device 33 for moving the cutter 31 in three dimensions is a first cylinder 34 comprising a fluid pressure cylinder 34a which reciprocates in a direction parallel to the moving direction of the conveyor, and guide rods 34b arranged in parallel on both sides of the fluid pressure cylinder 34a.
A second cylinder 35 having a fluid pressure cylinder 35a and a guide rod 35b which reciprocate in a direction perpendicular to the moving direction of a conveyor reciprocally mounted thereon, and a vertical direction fixed to a slider 35c of the second cylinder 35. The cutter 31 is provided on a slider 36b that moves up and down of the fluid pressure cylinder 36a, including a third cylinder 36 that is a fluid pressure cylinder 36a that reciprocates.

Further, the seal supply device 40 transfers the seal suction pad 41, the two fluid pressure cylinders 42 and 43 for moving the seal suction pad 41 forward and backward and up and down with respect to the package P, and the seal S to the seal suction pad 41. Is composed of a seal feeding device 45 for feeding the seal mount 44 for
Via the table 46 that moves forward and backward with respect to the package P,
It is attached to the body frame 1 at a lateral position of the cutting device.

In the apparatus constructed as described above, the tray 2 holding the package P is first conveyed by the chain type conveyor 1, for example.
Prior to that, the cutting position of the lap wound yarn formed on the bobbin end portion (of the package P) before that is detected automatically by the method described in JP-A-64-14337 or other peeling position automatic detection. It is fixed to the tray 2 in a positioned state by means or by hand.

The cutting position is usually set so that the bobbin surface C on which the slit groove G is not formed is the upper position, but the cutting position is not limited to this.

When the package P fixed to the tray 2 is sent to a predetermined position in front of the apparatus according to the present invention by the conveyor 1, the positioning stopper apparatus 3 is operated to raise the stopper 4 and stop the tray 2. As a result, the package P is accurately positioned.

After the positioning is completed, as shown in FIG. 2, the yarn cutting device 30 is advanced toward the package P by the operation of the second cylinder 35, and the cutter 31 (cutting edge 3
When 2) moves to the upper part of the cutting position, it descends, rises, moves forward and backward, and comes close to or comes into contact with the wrapping yarn Y to cut the wrapping yarn Y leaving the necessary transfer tail portion T. (As shown in FIG. 2, the bobbin rotates clockwise when viewed from the front side, and the yarn is wound counterclockwise).

In this case, it is preferable to use the hot air type as the cutter 31. The blade 32 of the hot-air type cutter (heater) has a thin slit-shaped hot-air blowing hole. For example, in the case of a polyester filament of 50 de, the hot-air blowing hole is directed in the width direction of the lap winding, and the flow rate is 100 ml / min, and the blowing hole is below At a temperature of 3 mm, an average temperature of 250 ° C., and a distance of 3 mm from the upper surface of the bobbin, a normal lap winding yarn having a winding width of 8 mm is melt-cut with a melting time of 2 seconds. This hot air cutter has a very sharp temperature distribution on the upper surface of the bobbin, and the temperature drops by 100 ° C or more at the 1 mm deviation, so there is no adverse effect of hot air on other parts and there are no scratches or marks on the bobbin surface. No damage remains.

As shown in FIG. 2 (b), the suction device 11 is advanced in the direction of the wrapping yarn Y by the operation of a fluid pressure cylinder (not shown) and is located close to its upper position.
Both ends Ya and Yb of the cut overlapping wound yarn are easily sucked into the suction device 11.

After that, when the suction device 11 retracts to the side of the bobbin B, the fluid pressure cylinder 28 operates and the gripper 23 moves forward to suck and grip the yarn ends Ya and Yb of the lap wound yarn. The gripper 23 grips the overlapped yarn Y that is connected between the suction device 11 and the bobbin {Fig. 2 (c)}.

By this grip, the suction operation of the suction device 11 is temporarily suspended. When the suction is interrupted, the motor 24 starts to rotate and the gripper 23 rotates while holding the yarn Y (FIG. 2 (c)). This rotation causes the gripper 23
The yarn Y gripped by is twisted and twisted in the rotation direction.

As the gripper 23 rotates, it lowers due to the descending motion of the fluid pressure cylinder 29. Therefore, the yarns that bite into the slit grooves are gathered as the gripper 23 descends while rotating, and a single yarn break occurs. Instead, it is reliably pulled out from the slit groove G.

At this time, if the yarn is wound in the counterclockwise direction, the yarn y connected to the package is shown in FIG.
In (c), it is in the overlapping wound yarn (group) Y which is taken up by the suction device 11 on the left side and is gripped by the gripper 23 on the same side.

When the left and right grippers 23 are lowered to a position below the bobbin B and the thread engaging with the slit groove G is taken out of the bobbin as shown in FIG. 2D, the left gripper 23 is opened. Overlap yarn Y is the right gripper 2
In the state in which only one of them is gripped by 3, the gripper 23 rises in accordance with the rising movement of the fluid pressure cylinder 29, and the overlapped yarn Y moves so as to be positioned in front of the suction device 11 on the right side (FIG. 2 (e)). }.

After that, when the suction device 11 is operated and the gripper 23 releases the grip of the overlaid yarn Y, the overlaid yarn Y is released.
Are sucked into the suction device 11 and removed.

In this case, the yarn end of the yarn y forming the transfer tail which is connected to the package P on the bobbin through several windings is also sucked by the suction device 11, which is connected to the package P. Therefore, the bobbin remains in a stretched state between the upper surface of the bobbin and the suction device 11 (FIG. 2).
(F)}.

In the state of FIG. 2 (f), the seal suction pad 41 receives the seal S from the seal mount 44 fed from the seal paper feeding device 45, and sucks the seal S,
When the fluid pressure cylinders 42 and 43 are moved upward, downward, forward, etc., they are moved to the position D at the bobbin contact end of the transfer tail yarn y in a state of being stretched by the suction device 11 and sealed. Stick S at position D and fix.

Next, the cutting device 30 moves to cut the yarn between the bobbin and the suction device 11, and the yarn package P having the transfer tail y of a predetermined length is produced.

When the yarn package P in which the yarn ends of the transfer tail y are fixed is formed in this manner, the gripper 23, the suction device 11 and the like return to their original positions, and then the stopper is unwound and the conveyor is used. Then, the tray moves, the package P is conveyed, the package to be processed next enters in its place, and the same operation is repeated thereafter, so that the yarn end processing is efficiently performed.

The above is one example of the method of removing the overlapping wound yarns, but another more efficient example will be described with reference to FIG. 3A to 3B are partial plan views of the bobbin front end portion, and FIGS. 2C to 2D are partial front views of the bobbin front end portion.

In this case, as shown in FIGS. 3 (a) and 3 (b), the overlapping wound yarn Y is cut by the cutter 31, and the left and right suction devices 11 suck and grip the yarn ends Ya, Yb. Similarly, thereafter, in this state or in a state in which the suction device 11 is retracted to the end portion on the bobbin side, the fluid suction cylinders 42 and 43 are moved upward, downward, forward, and the like to move the seal suction pad 4
1 moves to the position D on the bobbin which is the yarn end of the transfer tail yarn y, and the seal S is attached from above the transfer tail yarn y corresponding to the position D and this is fixed (this position is , Since the transfer tail formation at the time of winding is set to have substantially the same pattern, it is set as a fixed position, but the position may be detected by using a detector).

Next, the cutter 31 moves to the position D, and cuts the transfer tail yarn y which is the unwinding side on the side of the fixed position by the seal S (right side when viewed from the front). At this time, if the suction device 11 is at the position retracted to the end on the bobbin side, at least the suction device 11 on the right side when viewed from the front surface of the bobbin moves to a position where the cut yarn end connected to the overlapping wound yarn can be easily sucked. Therefore, the cut yarn end is sucked and gripped together with the lap wound yarn Yb.

After that, as shown in FIG. 3C, when the suction device 11 retracts to the side of the bobbin B in the same manner as described above, the fluid pressure cylinder 28 operates and the gripper 23 moves forward,
The gripper 2 inserts the lap wound yarn Y that is connected between the bobbin and the suction device 11 that holds the yarn ends Ya and Yb of the lap wound yarn.
3 grips.

By this grip, the suction operation of the suction device 11 is temporarily suspended. When the suction is interrupted, the motor 24 starts to rotate and the gripper 23 rotates while holding the yarn Y. By this rotation, the yarn Y gripped by the gripper 23 is twisted and twisted in the rotation direction.

As the gripper 23 rotates, it lowers due to the descending motion of the fluid pressure cylinder 29. Therefore, the yarns that bite into the slit grooves are gathered as the gripper 23 descends while rotating, and a single yarn break occurs. Instead, it is reliably pulled out from the slit groove G. The left and right grippers 23 are lowered to a position below the bobbin B, and the thread engaged with the slit groove G is taken out of the bobbin.
When the lap wound yarn is separated from the bobbin, the lap wound yarn is sucked and taken up by the suction device 11 'arranged at a position below the bobbin end or by the movement of the suction device 11, whereby the wrap wound yarn is further wound. Completely removed from.

The yarn end fixing by the transfer tail y seal may be carried out before the cutting of the lap wound yarn, and such yarn end fixing is not limited to the above-mentioned example and can be appropriately carried out. Is.

[0045]

As described above, according to the present invention, even in a bobbin having a large thread gripping force in the slit, the yarn in the slit can be reliably and easily removed without leaving a single fiber. The bobbin in which the slit is in the shape of a saw blade is reused, and the yarn unwinding failure due to the residual single fibers in the slit is eliminated.

[Brief description of drawings]

1 is a schematic perspective view of an apparatus suitable for implementing the present invention.

FIG. 2 (a) is an operation explanatory view of FIG. (B) It is operation | movement explanatory drawing of FIG. (C) It is operation | movement explanatory drawing of FIG. (D) It is operation | movement explanatory drawing of FIG. (E) It is operation | movement explanatory drawing of FIG. (F) It is operation | movement explanatory drawing of FIG.

3 (a) is another operation explanatory view of FIG. 1. FIG. (B) It is another operation explanatory view of FIG. (C) It is another operation explanatory view of FIG. (D) Another operation explanatory view of FIG. 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 2 Tray 10 Frame 11 Thread suction device 20 Thread gripping device 23 Gripper 30 Thread cutting device 33 Cylinder device 40 Seal supply device

Claims (2)

[Claims] 1. A yarn wound at the bobbin end along the circumferential direction by gripping the yarn at the beginning of winding at the time of yarn switching in a slit groove and overlappingly winding it and then forming a transfer tail. When removing the lap wound yarn from the package, the lap wound yarn at the position where the slit groove is not formed is cut, the yarn end of the cut yarn is suction-held, and then the yarn being suction-held is removed. A method for removing a lap wound yarn at the end of a bobbin, characterized in that the yarn is held by a holding device and is removed in the circumferential direction of the bobbin while rotating the holding device in the direction in which the yarn is twisted. 2. The method for removing a lap wound yarn at a bobbin end according to claim 1, wherein the cutting of the yarn is melted by a hot air heater.