JPH0738059U - Pneumatic yarn joining device - Google Patents

Abstract

(57) [Summary] [Object] To provide a pneumatic yarn splicing device capable of reliably pulling a bobbin thread under the same conditions regardless of the traverse position of a package and reliably splicing the bobbin thread. A yarn guide member is provided between a winding package and a yarn joining portion so as to be retractable from and into a yarn path of a yarn drawn out from the winding package to the yarn joining portion, and the yarn guide member is substantially centered. On the other hand, a yarn regulating portion for regulating the position of the yarn in the direction perpendicular to the yarn path to a fixed position is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pneumatic yarn splicing device.

[0002]

[Prior art]

 Conventionally, in a pneumatic yarn splicing device, the feeding side yarn end (upper yarn) and the winding side yarn end (lower yarn) to be spliced are sucked and gripped by suction members such as a suction nozzle and a suction mouth, respectively. While guiding the yarn to the front of the yarn splicing nozzle, both the yarns are drawn by a swiveling yarn shifting lever, and guided by a fork guide to introduce the upper yarn and the lower yarn into the yarn splicing nozzle. It was Then, after clamping them, the yarn tip is cut to a predetermined length, and after each cut yarn end is defibrated, the yarn pulling lever is further swung and the defibrating portion is overlapped, The splicing was carried out by injecting compressed air into the splicing nozzle and causing the swirling air current generated by the compressed air to envelop and integrate the single fibers and impart false twist.

In the above yarn joining process, when the lower yarn is guided to the yarn joining nozzle side by the suction mouth, the lower yarn is rewound by rotating the winding package in the reverse direction. It will be pulled out while traversing in the same direction, and the position of the bobbin thread at the time when the rewinding is completed is not constant.

When the bobbin thread is pulled by the thread pulling lever, when the bobbin thread is located at both ends of the package, the refraction of the bobbin thread in the thread pulling lever and the fork guide becomes larger than that in the case of being located in the center. The refraction increases the thread tension. Therefore, when the tension is released during cutting, the fiber at the yarn end is disturbed, or the yarn end position is restored and the length of the yarn end entering the untwisting pipe becomes unstable, resulting in unstable joint strength. In addition, there was a risk of impairing the appearance.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional technology, the present invention makes it possible to always pull out the bobbin thread under the same condition regardless of the traverse position of the package, and to reliably splice the thread. It is an object of the present invention to provide a possible pneumatic yarn splicing device.

[0006]

[Means for Solving the Problems]

 Between the winding package and the yarn splicing portion, a yarn guide member is provided so as to be retractable with respect to the yarn path of the yarn drawn from the winding package to the yarn splicing portion, and substantially at the center of the yarn guide member, A yarn regulating portion for regulating the position of the yarn in a direction perpendicular to the yarn path to a fixed position is formed.

[0007]

[Action]

 Prior to yarn splicing, when the yarn guide member is projected to the yarn path of the yarn (bottom yarn) that is sucked by the suction member, is rewound in the gripped state by the winding package, and is drawn out to the yarn splicing part, The (bottom thread) is supported by the guide member and introduced into the yarn regulating section while traversing along the guide member. After that, the traverse is regulated by the yarn regulating section and the yarn is spliced at a constant yarn path. Guided to the department.

[0008]

【Example】

 Embodiments will be described with reference to the drawings.

1 to 3 show an example in which the pneumatic yarn splicing device 1 of the present invention is applied to a three-wire spinning machine 2. In the figure, the spinning machine 2 has a large number of spinning units 10 in which a three-wire draft device 3, an air spinning device 4, a delivery roller 5, a slack tube 6, a yarn clearer 7, and a winding device 8 are arranged in series. It will be.

The pneumatic yarn splicing device 1 is attached to a work carriage 13 that reciprocates between the spinning units 10 along tracks 11 and 12 attached in the longitudinal direction of the machine base 9 of the spinning machine 2. The yarn guides 16 and 17, the defibrating nozzles 18 and 19, the yarn cutting devices 20 and 21, and the fork guides 22 and 23 are sequentially arranged on both upper and lower sides of the yarn joining member 15 fixed to the center of the front plate 14 with the yarn joining member 15 interposed therebetween. The yarn splicing portion 1a. Numerals 24 and 25 are yarn pulling levers which are fixed to both ends of the rotary shaft 26 and rotate. The clamp devices 27 and 28 are provided above and below the yarn pulling levers 24 and 25, respectively.

The yarn splicing member 15 has a cylindrical yarn splicing nozzle 30 formed in the center thereof by penetrating both side walls of the nozzle block 29, and a compressed air injection hole (not shown) is formed on the inner peripheral surface of the yarn splicing nozzle 30. Is open. Further, 31 is a slit for introducing the yarn into the yarn joining nozzle 30.

The pneumatic yarn splicing device 1 sucks and grips the upper yarn YB fed out from the inside of the dust collector 4a provided on the downstream side of the air spinning device 4 and the upper portion of which is open, and the front face of the yarn splicing portion 1a. Suction nozzles 32 for guiding to the front of the yarn splicing portion 1a for sucking and grasping the bobbin thread YP wound on the package P are additionally provided. A yarn guide member 34 is attached between the portions 1a.

The thread guide member 34 is parallel to the traverse direction of the traverse guide 81 of the winding device 8 at the tip of a lever 35 rotatably supported by a bracket 37 fixed to a frame 36 of the work carriage 13. The guide edge 38 is cantilevered on the front edge of the plate-shaped body, and a guide edge 38 is formed over the entire width of the front edge of the plate-like body. There is. A connecting rod 40 is connected to the other end of the lever 35 to move back and forth by a cam (not shown) to pivot the lever 35.

A grip for fixing the swing of the cradle 83 to the work carriage 13 by pressing the package pressing plate 41, which separates the package P from the winding drum 82 during yarn splicing, and the cradle boss 84, and fixing the swing of the cradle 83 at the separated position. A lever 42 and a reverse roller 43 which is swung by a swivel arm 44 and comes into pressure contact with the package P are provided.

Next, a yarn joining process will be described based on examples.

When the work carriage 13 is stopped by the unit 10 by a stop device (not shown) at the time of yarn joining, the package pressing plate 41 first pivots clockwise in FIG. 1 to move to a position indicated by a two-dot chain line 41 '. By doing so, the package P rotatably supported by the cradle 83 is pressed to be separated from the winding drum 82. Then, the grip lever 42 swivels and presses against the cradle boss 84 to prevent the cradle 83 from swinging, thereby fixing the package P in the separated position and the package pressing plate 41 to the original position. Return to position.

Next, the connecting rod 40 causes the lever 35 to pivot counterclockwise from the position indicated by the alternate long and short dash line in FIG. 1, causing the thread guide member 34 to project forward, and then the suction mouth 33 pivots counterclockwise. Then, as shown by 33 'in FIG. 1, the tip suction port is brought close to the package P and the surface is sucked.

In this state, the reverse roller 43 is pressed against the package P by the turning motion of the turning arm 44 in the clockwise direction in FIG. 1, and the package P is rotated in the reverse direction to search for the yarn end, and the suction mouth 33 is moved. The lower thread YP is gripped by suction. Further, the suction mouse 33 pivots upward and returns to its original position, thereby guiding the unwound bobbin thread YP to the front surface of the thread joining section 1a.

At this time, the bobbin thread YP unwound from the package P and pulled upward is supported by the guide edge 38 of the thread guide member 34, and along the guide edge 38, as shown in FIG. It is introduced into the yarn regulating section 39 while traversing, and thereafter, guided by the yarn regulating section 39, it is pulled straight out with a certain yarn path upward, and is guided to almost the center of the yarn joining section 1a. Get burned. The reverse roller 43 has stopped rotating after rotating for a predetermined time.

On the other hand, if the suction nozzle 32 swivels clockwise in FIG. 1 and is positioned inside the dust collector 4a on the downstream side of the pneumatic spinning device 4 as indicated by 32 ', if spinning is started, The yarn end of the upper yarn YB drafted by the draft device 3 and discharged to the downstream side of the air spinning device 4 is sucked and grasped by the suction nozzle 32 ', and the suction nozzle 32' pivots downward as it is. By returning to the original position, the upper thread YB is guided to the front surface of the yarn joining section 1a.

In this way, the upper yarn YB and the lower yarn YP guided to the front surface of the yarn joining portion 1a are moved by the yarn shifting levers 24 and 25 pivoting together with the rotation shaft 26. 2 and 3, it is introduced from the slit 31 into the yarn joining nozzle 30 of the yarn joining member 15 as shown in FIGS. Next, the upper thread YB and the lower thread YP are clamped at their proximal ends by clamp devices 27 and 28 provided above and below the thread shifting levers 24 and 25, and at the same time, they are attached to the suction nozzle 32 and the suction mouth 33. The tip side that is gripped by suction is cut by the thread cutting devices 20 and 21.

At this time, in particular, the bobbin thread YP sucked and gripped by the suction mouth 33 is guided by the thread restricting portion 39 of the thread guide member 34 and is substantially at the center of the yarn splicing portion 1a regardless of the traverse position in the package P. Since it is located at, the thread tension generated in the bobbin thread YP by being pulled by the thread pulling levers 24 and 25 is always constant and kept to a minimum. Therefore, the bobbin thread YP is always cut in the optimum cutting state with a constant length, and the cutting does not cause disorder in the fiber of the cut portion or the situation where the fiber is not cut into a predetermined length.

After the yarn ends of the upper yarn YB and the lower yarn YP are sucked into the defibrating nozzles 18 and 19 to be defibrated, the yarn pulling levers 24 and 25 are further swung to move the yarn ends YB and When YP is positioned in the yarn splicing nozzle 30 so as to overlap each other, compressed air is sprayed into the yarn splicing nozzle 30 to splice the yarn ends YB and YP. During this time, the yarn slack generated in the upper yarn YB is sucked and stored by the slack tube 6.

After the yarn splicing by the yarn splicing nozzle 30 is completed, the clamp devices 27 and 28 and the yarn shifting levers 24 and 25 start to return to their original positions, and at the same time, the reverse roller 43 is at 43 'in FIG. As described above, the grip lever 42 is separated from the cradle boss 44 and the cradle 83 is returned to the original position, so that the package P is pressed against the winding drum 82 and the winding is restarted. When the spinning is resumed, the yarn guide member 34 holds the projecting position for a while, and the yarn regulating section 39 temporarily regulates the traverse of the yarn. This is to prevent the yarn from immediately traversing and entering the back side of the clamping device 27 and the yarn shifting levers 24 and 25 and being caught therein. After that, the yarn guide member 34 returns to the original position, delivers the yarn to the traverse guide 81, and shifts to a normal winding state.

In the above-described embodiment, an example in which the pneumatic yarn splicing device 1 is applied to the spinning machine 2 is shown, but the present invention is not limited to this, and a winder and other various fibers that require yarn splicing. It is added that it is feasible for textile machinery.

[0026]

[Effect of device]

 INDUSTRIAL APPLICABILITY As described above, the pneumatic yarn splicing device of the present invention is arranged between the winding package and the yarn splicing portion so that the yarn is freely retractable from the yarn path of the yarn drawn from the winding package to the yarn splicing portion. Since the guide member is provided and the yarn regulating portion that regulates the position of the yarn in the direction perpendicular to the yarn path to a fixed position is formed in the approximate center of the yarn guide member, The bobbin thread is always guided to a predetermined position in the center of the yarn joining section regardless of the traverse position of the take-up side yarn end). As a result, the variation in thread tension that occurs when pulling the bobbin thread to the thread splicing part is suppressed and minimized, so that the bobbin thread can be trimmed to a predetermined length without causing fiber disorder. Therefore, it is possible to splice with a good seam appearance.

[Brief description of drawings]

FIG. 1 is a side view showing a spinning machine equipped with a pneumatic yarn joining device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a pneumatic yarn splicing device according to an embodiment of the present invention.

FIG. 3 is a front view of a main portion of a pneumatic yarn splicing device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Pneumatic yarn splicing device 1a Yarn splicing part 2 Spinning machine 8 Winding device 13 Work cart 14 Front plate 15 Yarn splicing member 20,21 Yarn cutting device 22,23 Fork guide 24,25 Yarn pulling lever 27,28 Clamping device 32 Suction nozzle 33 Suction mouth 35 Thread guide member 39 Thread regulating section YB Upper thread YP Lower thread P Package

Claims (1)

[Scope of utility model registration request] 1. A yarn guide member is provided between the winding package and the yarn joining portion so as to be retractable from and into a yarn path of a yarn drawn from the winding package to the yarn joining portion, A pneumatic yarn splicing device, characterized in that a yarn regulating portion that regulates a position of the yarn in a direction perpendicular to the yarn path to a constant position is formed substantially at the center.