JPH06135630A - Removal of superposed winding yarn at edge of bobbin - Google Patents

Abstract

PURPOSE:To surely and speedily remove the punch winding formed at the edge of a bobbin, without leaving a yarn in a yarn applying slit. CONSTITUTION:A superposed wound yarn Y at the position free from the cut of a slit groove G is cut by a cutter 31, and after the cut yarn Ya is held by a suction device 11, the yarn Ya in suction holding is held by a gripper 23, and the gripper 23 is shifted in the direction separating from a bobbin through the revolution in the direction for applying twist on the yarn, and the superposed wound yarn Y is removed by revolving also the bobbin B itself to the side where the yarn is peeled off.

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 beginning of winding and a yarn end at the end of winding between raw yarn bobbins. In order to combine them with each other for continuous processing, a so-called transfer tail is formed at the bobbin end outside the traverse area at the beginning of winding (Japanese Patent Publication No.
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 end of the bobbin 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 yarn end stripping processing has been carried out 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 with 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, the bobbin end is bunch-wound 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 conventional methods are not yet sufficiently satisfactory.

Further, with the recent increase in the number of automatic winder systems, in the case of a bobbin having a slit for thread hooking at the end of the bobbin, the inside of the slit has a saw-like blade for the purpose of improving the thread hooking 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, for example, the thread gripping force of about 200 g in the past is 1500 g.
With such a bobbin, the yarn of the part that digs into the slit in such a bobbin is difficult to remove not only manually but also by the above-mentioned mechanical method, and even if it can be removed, a part of it can be removed. It has a defect that it is broken and remains, and the yarn remaining in the slit is caught at the time of unwinding the yarn and the unwinding is unsatisfactory.

Further, when the re-use of the bobbin is attempted, if the thread remains in the conventionally used thread gripping slit, the thread gripping force of the slit decreases at the next use. Then there was the problem that the threading fails. For this reason, the present inventor has proposed a method of stripping the yarn from both sides of the bobbin while twisting it when stripping the yarn from the slit of the bobbin (Japanese Patent Application No. 3-329795).

[0010] This method has been further improved to the point where it can be put to practical use without problems in operation, but at present it is still not sufficiently satisfactory. That is, since the yarn is stripped off on both sides of the bobbin, there is a drawback that the width dimension becomes large. In addition, since the gripper that grips the yarn on the side of the bobbin descends at a constant interval from the bobbin, it is necessary to make detailed condition settings for the descending speed and the rotation speed of the gripper depending on the thickness of the yarn, which is troublesome to operate. There is a problem that it is difficult to deal with diversification because it is not practical for processing a wide variety of brands.

Further, in the above method, a servo motor for rotating the gripping tool and a servo motor for raising and lowering the gripping tool are required on both sides, which is disadvantageous in that the equipment becomes expensive and the maintenance becomes complicated.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a bunch winding formed at the end of a bobbin can be used for yarns having different thicknesses without leaving the yarns in the yarn hooking slit. It is also an object of the present invention to provide a method capable of surely and promptly removing it without changing the conditions.

[0013]

That is, according to the present invention, a transfer groove is formed in a slit groove formed in the bobbin end portion in the circumferential direction so that the yarn at the beginning of winding at the time of yarn switching is grasped and overlapped and then transferred to the transfer tail. When removing the lap wound yarn from the wound yarn package that has been wound up, the lap wound yarn at the position where the slit groove is not formed is cut, and one end of the cut yarn is sucked and held. , Grasping the yarn being held by suction with a grasping tool and moving it in the direction away from the bobbin while rotating the grasping tool in the direction to twist the yarn, and rotating the bobbin to the side where the yarn is peeled off. A method for removing a lap wound yarn at the end of a bobbin is characterized in that the yarn is removed.

[0014]

In the present invention, one end of the cut wrapping yarn is grasped by a grasper, which is rotated and moved while twisting to move away from the bobbin. Since it is removed while rotating to the side,
Even in a bobbin with a large thread gripping force of the slit, the yarn in the slit can be reliably and easily removed without leaving single fibers under the same conditions regardless of the thickness of the yarn.
It eliminates the problem of yarn unwinding due to the reuse of bobbins and single fibers remaining in the slit, and the equipment width can be made extremely small. .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic overall perspective view of an apparatus suitable for carrying out the present invention, FIGS. 2 (a) and 2 (b) are side views of a yarn package cage transfer tray and an enlarged sectional view of its main part, and FIG. a)
3 (d) is a diagram for explaining the operation of FIG. 1, FIGS. 3 (a) and 3 (b) are partial plan views of the front end portion of the bobbin, and FIG.
(D) is a partial front view of the bobbin front end portion.

In the figure, 10 is a frame of the apparatus main body according to the present invention.
A yarn gripping device 20 that grips the cutting yarn end of the overlapping wound yarn on the bobbin end, a cutting device 30 that includes a cutter for cutting, and a seal supply device 40 that fixes the yarn end of the transfer tail to the bobbin end are provided. ing.

A conveyor 1 for transporting a transfer tray 50 for the yarn package P is arranged at a front position of the frame 10, and the tray 5 holding the yarn package P is provided.
0 is carried by the conveyor 1, but is positioned and stopped accurately by the operation of a positioning stopper (not shown) provided at a predetermined position in front of the frame 10.

A yarn suction device 11 is provided at a front position corresponding to the yarn package P at the stop position. The suction device 11 is attached to an arm (not shown) provided so as to be able to move forward and backward by 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 is connected to a motor 24 fixed to a plate 27 that is movable in the front-back and up-down directions via a belt (for explanation, the belt is connected via a belt). However, it may be directly connected to a gear or a motor drive shaft to transmit rotation.) A box 26 connected to a drive shaft 25 incorporating a rotary actuator to rotate, a fluid pressure cylinder or an electromagnetic valve (not shown) provided in the box 26. Two movers (one may be fixed) which opens and closes like scissors due to force, etc.
It is configured to include a gripper 23 and the like for gripping a yarn consisting of 22.

The plate 27 is attached via a fluid pressure cylinder 28 vertically reciprocatingly projecting vertically toward the conveyor side fixed to the frame 10 (in a direction perpendicular to the moving direction of the conveyor). Pressure cylinder 2
8, the plate 27 is moved up and down, and the gripping device 2
0 (gripper 23) is moved vertically.

The cutter 31 of the yarn cutting device 30 has a cutting edge 3
2 is arranged 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 described later.), And is provided so as to be movable in the up-down and front-back directions by a cylinder device described later.

The cylinder device for moving the cutter 31 is a fluid pressure cylinder 33a which reciprocates in a direction perpendicular to the moving direction of the conveyor, and a guide rod 33 which is arranged side by side with the fluid pressure cylinder 33a.
fluid pressure cylinder 33 having b, fluid pressure cylinder 3
The fluid pressure cylinder 34 and the like fixed to the slider 33c of No. 3 and reciprocating in the vertical direction are included, and the cutter 31 is provided in the fluid pressure cylinder 33.

At the upper left side position of the yarn cutting device 30, there is provided a suction device 16 provided with a V-shaped guide 17 in the longitudinal direction at the tip end thereof and a fluid pressure cylinder 18 for moving the suction device 16 back and forth in the bobbin direction. The yarn suction remover 15 is arranged on the plate 10 via a bracket (not shown).

The seal supply device 40 also passes the seal suction pad 41, two fluid pressure cylinders 42 and 43 for moving the seal suction pad 41 forward and backward relative 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
The main body frame 10 at the side position of the cutting device is provided via a table (not shown) that moves forward and backward with respect to the package P.
Is attached to.

The tray 50 for carrying the package is the main body 5
1. A substrate 52 that supports the main body 51, a support pillar 53 having a channel-shaped cross section that projects upright on the base 52, and a package retainer 55 disposed via a pedestal 54 attached to the support pillar 53. Composed of.

The package retainer 55 is a bobbin holder 5 rotatably retained by a bearing 56 fixed to the pedestal 54.
Have 7. This bobbin holder 57 is a hollow body 57 in which axial slits 58 formed at regular intervals in the circumferential direction are provided with chuck claws 59 for gripping the package from the inner surface.
a, a spring 61 for movably supporting the chuck claws 59 arranged in the holder 60 provided in the hollow body 57a in the vertical direction (diameter direction), a support shaft 57b for holding the hollow body 57a, and the like. And the support shaft 57b has the bearing 56 described above.
It is rotatably supported by. The chuck claws 59 may be arranged in the circumferential direction, or may be an expandable ring body.

A rear end portion of the support shaft 57b is formed with a spline shaft or a vertical groove 62, and a drive engaging device 63 having a hollow hole having a groove or a ridge corresponding to the spline shaft is movable in the axial direction. Are bound to. This engaging device 63 is provided with a hollow portion 64 forming a conical coupling surface for connecting with the driving means on the rear side of the support shaft 57b, and a collar 65 corresponding to a brake plate on the outside thereof, which faces the collar 65. A brake band or pad 68 is provided via a support plate 67 of a bracket 66 attached to the support pillar 53.

At the front position of the engaging device 63, the support shaft 57 is provided.
A coil-shaped spring 71 is mounted between the receiving ring 69 fixed to b and the step surface 70 provided on the front side of the engaging device.
The pressing force of 1 always presses the engaging device (brake brim 65) against the surface of the brake pad 68.

In such a device, the yarn package is automatically inserted into the bobbin holder 57 by a transshipping device (not shown). At this time, the chuck claw 59 is shown in FIG.
When the package is inserted into the bobbin holder 57, the spring 61 contracts, and a force that constantly presses the paper tube or bobbin of the package inward is exerted. The package inserted in 57 is tightened by the bobbin holder 57 so that it will not be displaced or fall out even during transfer.

In this state, the yarns are conveyed between the respective automatic yarn end treating devices and positioned for each tray. At this time, FIG. 2 (b)
The brake pad 68 and the collar 65 are constantly pressed by the spring 71, and the bobbin holder 57 is fixed to the base 66.
It is in a stationary state as it is fixed to.

First, the tray 50 holding the package P is conveyed by, for example, the chain type conveyor 1, but the package P is in front of it (the package P
The cutting position of the lap wound yarn formed at the end of the bobbin is positioned by an automatic detection method as described in JP-A-64-14337 or other peeling position automatic detection means or manually. It is fixed to the tray 50 in this state. Note that the cutting position is normally set so that the bobbin surface C where 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 50 is sent to a predetermined position in front of the apparatus according to the present invention by the conveyor 1, the positioning stopper apparatus operates to raise the stopper and stop the tray 50. The package P is accurately positioned.

After the positioning is completed, the rotary driving machine 7 of the driving device 72 formed in a conical shape corresponding to the hollow portion 64 of the engaging device.
The taper sleeve 75 provided on the transmission shaft 74 of No. 3 (if the engaging device is a groove engagement or a spline type has a corresponding shape) enters the engaging device 63 and contacts the hollow portion 64 thereof. Press to enter the connected state. At this time, the spring 71 is compressed by the pressing force of the taper sleeve 74, so that the collar 65 is separated from the brake pad 68, and the bobbin holder 57 supported by the bearing 56 becomes rotatable by releasing the brake. . At this time,
When the drive is transmitted to the engaging device 63, the bobbin holder 57 is driven in response to the drive, and the package is rotated or rotated in a predetermined manner.

The drive device 72 is, as shown in FIG.
It has a rotary drive machine 73 (pneumatic type is generally used, but other type such as electric type may be used) fixed to a pedestal 78 that moves back and forth by a fluid pressure cylinder 77 provided on a machine base 76. The transmission shaft 74 (taper sleeve 75) is arranged so as to correspond to the shaft center of the package P, and the rotation driving machine 73 is moved forward via the plunger 77a by the operation of the fluid pressure cylinder 77, As shown in FIG.
Connect with b. 79 is a guide rod.

Although the entire rotary drive unit 73 is moved, other means such as moving only the taper sleeve 75 may be used.

After this, as shown in FIG. 3, the cylinder 3
By the operation of 3, the yarn cutting device 30 advances toward the package P, and when the cutter 31 (blade edge 32) moves to the upper position of the cutting position, the yarn cutting device 30 descends, ascends, moves forward and backward, and so on. The wrapping yarn Y is cut by leaving the transfer tail portion T close to or in contact with the yarn (the bobbin rotates clockwise when viewed from the front side as shown in FIG. 3, and the yarn rotates counterclockwise). It is wound around).

In this case, it is preferable to use the hot air type as the cutter 31. The hot-air cutter (heater) has a slit-shaped hot-air blowing hole with a thin blade edge. 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 wrapping yarn, the flow rate is 100 ml / min, and the bottom of the blowing hole is 3 mm Average temperature of 250 ℃, distance from bobbin upper surface 3mm
At, a normal lap winding yarn having a winding width of 8 mm is melted with a melting time of 2 seconds. This hot air type cutter has a very sharp temperature distribution on the upper surface of the bobbin, and the temperature drops by 100 ° C or more in the 1 mm misaligned part, and there is no adverse effect of hot air on other parts, and there are no scratches or marks on the bobbin surface. No damage is left.

As shown in FIG. 3 (b), the suction device 11 is advanced in the direction of the lap winding yarn Y by the operation of a fluid pressure cylinder (not shown) and is located close to its upper position.
The cut end Ya of the cut wrapping yarn is easily sucked by the suction device 11
Is sucked into.

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 end Ya of the lap wound yarn. The gripper 23 grips the lapped yarn Y that is continuous between 11 and the bobbin {Fig. 3 (c)}.

By this grasping, the suction operation of the suction device 11 is temporarily stopped. When the suction is interrupted, the motor 24 starts rotating and the gripper 23 rotates while gripping the yarn Y (FIG. 3 (c)). This rotation causes the gripper 23
The yarn Y gripped by is twisted and twisted in the rotation direction.

The gripper 23 moves up and down as the fluid pressure cylinder 29 moves up and down, and the motor (or rotary actuator) of the taper sleeve 75 engaged with the engaging device moves in the direction in which the yarn separates. The bobbin (package) inserted into the bobbin holder 57 rotates. For this reason, the yarn that has cut into the slit groove does not cause single yarn breakage,
It is reliably pulled out from the slit groove G.

Before the yarn is completely separated from the slit groove G, the yarn suction remover 15 in which the suction operation is started by the operation of the fluid pressure cylinder 18 is applied to the yarn Y in the middle of stripping {FIG. d)}, when the tail end of the yarn Y leaves the slit groove G, the yarn is sucked by the suction remover 15, and then the gripper 23 is released, so that the yarn stripped off is completely removed by the yarn suction remover 15. Aspirated and removed.

In this case, a yarn y forming a trunnal tail which is continuous with the package P on the bobbin through several windings.
Although the yarn end of the sticker is also sucked, the sticker sticking pad 41 receives the sticker S from the sticker mount 44 sent from the sticker paper feeding device 45 before starting the peeling operation, sucks the sticker S, and sucks the sticker S. Lifting of the pressure cylinders 42 and 43,
When the transfer tail yarn y is moved to the position D at the bobbin contact end of the transfer tail yarn y due to an operation such as descending or advancing, the seal S is located at the position D (at this position, the transfer tail formation at the time of winding is almost the same pattern). Therefore, the position is set as a fixed position, but the position may be detected by using a detector).

Next, the cutting device 30 moves to cut the side of the seal S which is continuous with the yarn Y side {FIG. 3 (b)}.

Thereafter, the stripping operation is performed to produce the yarn package P having the transfer tail y of a predetermined length.

When the yarn package P to which the yarn end of the transfer tail y is 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 released. Then, the tray 50 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 yarn end fixing by the seal of the transfer tail y is not limited to the cutting of the lapped yarn and may be performed at any time, and such yarn end fixing is limited to the example described above. However, it can be implemented as appropriate.

[0048]

As described above, according to the present invention, even in a bobbin in which the thread gripping force of the slit is increased, the single fiber remains in the thread under the same condition regardless of the thickness of the thread. Can be removed reliably and easily without removing, especially the reuse of the bobbin in which the slit is in the shape of a saw blade, the yarn unwinding failure due to the residual single fibers in the slit, and the width of the device can be made very small. Not only the equipment itself becomes compact, but also the equipment cost can be reduced and maintenance can be improved, which is a remarkable effect.

[Brief description of drawings]

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

FIG. 2 (a) is a side view of a transfer tray for the yarn package. (B) It is an enlarged sectional view of a main part of the transfer tray for the yarn package.

FIG. 3 (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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 conveyor 10 frame 11 yarn suction device 15 yarn suction remover 20 yarn gripping device 23 gripper 30 yarn cutting device 40 seal supply device 50 carrier tray 55 package holder 57 bobbin holder 63 engager 72 drive Device 75 Taper sleeve

Claims (1)

[Claims] 1. A yarn wound at the bobbin end along the circumferential direction by gripping a 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, one end of the cut yarn is suction-held, and then the yarn being held by suction is gripped. Gripping with a tool and moving the gripping tool in a direction away from the bobbin while rotating the gripping tool in the direction of twisting the yarn, while rotating the bobbin to the side where the yarn peels off to remove the yarn. A characteristic method for removing the overlapped yarn at the bobbin end.