JPS58144065A - Method and device for untwining thread ends in a pneumatic splicer - Google Patents

Abstract

PURPOSE:To obtain always good spliced condition with a splicing arrangement, in which a thread end is set in a nozzle pipe and untwining is made under action of a jetting stream, by changing the jetting position of the stream in nozzle pipe in relation to the twining direction of the thread's own. CONSTITUTION:This untwining device has a thread-end untwining pipe 26 fitted in a nozzle hole 12 of block 28 slidably and rotatably and performs untwining of thread ends YB, YP when the YP on the package side is to be spliced with the one YB on the bobbin side. For untwining, the thread end YB introduced into a splicing hole 5 by vacuum force, which acts on the pipe 26, is sucked in the nozzle hole 12, and then the compressed fluid supplied to conduits 29, 30 is allowed to jet against the thread end YB out of a jet hole 27. Connection of jet hole 27 is changed over from the conduit 29 to 30 or vice versa by turning the pipe 26 approx. 90 deg. either in the regular or reverse direction according to the twining direction of the thread end YB for the purpose of having any necessary direction for jetting of the compressed fluid.

Description

[Detailed description of the invention] Among spun yarn splicing methods, the pneumatic splicing method has no knots compared to conventional pusherman knots and weaver knots, and is easy to use in subsequent processes such as knitting and weaving. Superiority is being recognized in terms of thread cutting and thread catching.

The pneumatic splicing device creates a splice by applying airflow to the splicing hole to align both yarn ends. Separating and removing the yarn to make the tip of the yarn tapered,
This is a very effective means for obtaining good seams. In Patent Application No. 54-7350 (Japanese Patent Publication No. 56-47108), the present applicant has already reported that after suctioning the yarn end into a yarn end control nozzle and separating and removing the fiber at the end of the yarn,
An application has been filed for a device that performs yarn splicing by applying an air jet to both ends of yarn drawn together in a splicing nozzle, but S
The airflow in the yarn end control nozzle had to be changed for twisted yarns and 2-twisted yarns, and it was not possible to handle both S-twisted and 2-twisted yarns with one device. It was necessary to expose the yarn end in the yarn end control nozzle to a swirling air flow in the direction opposite to the twisting direction inherent to the yarn.

The yarn end untwisting device according to the present invention sucks the yarn ends into a nozzle vibe and untwists them, or further separates and removes the fibers at the tip of the yarn ends. 1 This provides a pneumatic yarn splicing device that can handle unpunched yarns in any twisting direction and obtain extremely good seams. "Untwisting" in the text refers to untwisting the yarn, but it does not only refer to untwisting to a state where there is no twist at all, but also includes untwisting to some extent. It is called "untwisting."

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an automatic wine gourd (not shown) having a pneumatic yarn splicing device (3) according to the present invention, in which the yarn YP on the package side is transferred to the suction arm (2), and the yarn YB on the bobbin side is transferred to the suction arm (1) G. Therefore, each pneumatic yarn splicing device (shown is guided to the front of the splicing device).Suction arms (11, (2+) are rotatable by a mechanism not shown, and suction arms around the package or bobbin are shown. The yarn end can be guided to the position shown in Fig. 1.In the center of the pneumatic yarn splicing device, there is a splicing hole (9) for splicing the yarn, and a rotating air A nozzle block (41 pieces 2F+') having a jet hole (6) for generating a flow is screwed to block f28> via a front plate (7).The front plate (7) has a thread guide A thread guide block (8), (10), (11) is provided, and a nozzle hole (12) leading to the nozzle pipe (26) is provided.
), (13) are drilled. Nozzle block (4
A thread presser lever (18) is placed between the thread pressers 1 and 1, and is movable forward and backward with respect to the front plate (7). The thread presser lever (18) has the function of guiding the thread into the thread splicing hole and positioning it at a certain position within the thread splicing hole. Nozzle hole (
12) There are thread cutting devices (14) on both sides of N (13).
, (15), and the cut yarn ends are sucked into adjacent nozzle holes. Thread cutting device (14)
, (1s) are provided with fork guides (16) and (17) having grooves for guiding the thread, and the thread shifting levers (19) and (20), which are pivotally supported by the first bar (21), are rotated. both threads are guided into this groove. Also, the thread lever (2)
0) comes into contact with a stopper (22) and stops. After both yarns are guided to the splicing hole (5), the clamp devices (23) and (24) are used until the splicing is completed.
Clamp the thread YB on the bobbin side and the thread YP on the package side.

There is a yarn detection device (25) at the bottom of the pneumatic yarn splicing device (3).
When splicing, the quality of both yarns YB and YP is checked, but the details of this operation will be omitted here.

Next, an outline of the thread splicing operation will be explained.

If thread breakage occurs in the automatic wine goo during winding,
First, the thread presser lever (18) retreats to the position shown by the solid line, the thread YP on the package side is transferred to the suction arm (21), and the thread YB on the bobbin side is transferred to the front of the pneumatic splicing device (pneumatic splicing device) via the suction arm (1). This is the state shown in Figure 1, and then the thread guide lever (19), (2
0) rotates and pulls the threads YB and YP towards the 70 point plate (force).The threads YP and YB are connected to the fork guide (16).
, (17), and the thread guide block (81, (
91, (10) and (11). Furthermore, the thread presser lever (18) turns to the chain line position, and the thread YP%Y
B is reliably guided to the yarn splicing hole (9).At this time, the upper and lower clamping devices (26) and (24) respectively clamp the yarn yp%YB.Next, the yarn cutting devices (14) and (15) cut the yarns YB and YP, respectively. At the same time, the nozzle pipe (26) operates, and the cut yarn ends pass through the nozzle hole (1).
2), (13) e da 1 0 After this, the thread guide levers (19), (20) move further forward, pull out the thread end in the nozzle pipe (26), and move it into the thread splicing hole (5). Arrange them. Then, compressed air is ejected from the ejection hole (6) and the yarn is spliced. When the thread splicing is completed, the clamp devices (23) and (24) release the thread ends, and the thread shifting levers (19), (20) and thread presser lever (18)
moves back, and the spliced yarn returns to the normal yarn path through the splicing hole (5) and is wound up again.

The above is an outline of the yarn splicing operation.Next, the operation around the nozzle pipe section, which is the part of the present invention, will be explained in detail. Although only the periphery of the nozzle pipe communicating with the nozzle hole h2) will be described here, the same applies to the periphery of the nozzle pipe communicating with the other nozzle hole (13). Now, as shown in Fig. 2, the block (2B) is fitted with a rotatable and slidable Ninosuru vibe (26), and the nozzle pipe (
26) has one jet hole (27) drilled at a certain angle toward the axis of the nozzle pipe. Due to this angle, a suction flow is generated in the nozzle hole (12), and the cut yarn end is is attracted. There are two conduits (29) and (30) towards the block (28) as shown in Figures 3 and 4.
) are drilled at an angle of 90@. By turning the nozzle pipe (26) 9011 times, the ejection position is changed for the yarn YE sucked into the nozzle pipe. Compressed air that has passed through the conduit (29) is ejected from 27). When viewed from the cross-sectional direction of the nozzle pipe, the air flow immediately after ejection creates a symmetrical swirling flow in the opposite direction as shown in the figure. . The S-twist yarn YB is exposed to the swirling flow in the direction of untwisting the S-twist. Then, the 8-twist yarn YB is untwisted in the nozzle pipe (26) and each fiber is loosened, and some of the fibers are separated and removed at the tip of the yarn end, resulting in a tapered shape that is suitable for splicing. Figure 4 shows a case where two-twist yarn YE is handled, and the nozzle pipe (26) is rotated 90 degrees. Spout hole (27)
Compressed air passes through the conduit (30) and blows out from the thread YB.
is exposed to a swirling flow in the direction of untwisting the two twists. The following is the same.0 By turning the nozzle pipe (26) 90'' as described above, you can also create a 2-twist yarn for S-twist yarn (even if it is difficult, you can maintain a good yarn end condition when splicing the yarn). That's what you can get.

Furthermore, by sliding the nozzle pipe (26) back and forth, the jetting angle or jetting amount can be changed to accommodate differences in yarn count and yarn type. :- Figures 5 and 6 show a second embodiment of the present invention.

As in the previous embodiment, the block (36) has two conduits (3
1), (62) are perforated, and each conduit (31), (32)
have on-off valves (57) and (38), respectively. Furthermore, the nozzle vibe (35) has two ejection holes (33),
(34) are bored and communicate with conduits (51) and (52), respectively.

As in the previous embodiment, each of the ejection holes (53) % (34) is bored at a certain angle toward the axis of the nozzle vibe (35). For the 8-twist yarn YB, as shown in FIG. 5, the on-off valve (38) is closed and compressed air is ejected only from the ejection hole (33). In addition, for the two-twist yarn YE, as shown in Figure 6, the on-off valve (37) is closed and compressed air is spouted only from one jet hole (34). This is a third embodiment of the invention.

A nozzle vibe (40) is rotatably fitted into the block (59), and a nozzle pipe (40) has an ejection hole (41).
) is drilled at a certain angle toward the axis of the nozzle vibrator, and a contact hole (41) is connected to this nozzle hole (41).
(42) is provided. Attachment Men) (42)
A flexible conduit (43) is attached to supply compressed air.

For the S-twist yarn, the nozzle vibrator (40) is set at the position shown by the solid line in FIG. 8, and for the 2iIA yarn, the nozzle vibrator (40) is turned to the position shown by the chain line in FIG.

The present invention is not limited to the embodiments illustrated above, and compressed air may be simultaneously ejected into the nozzle pipe from a plurality of ejection holes.

As explained above, the yarn end untwisting device according to the present invention is capable of S-twisting,
For both two-twist yarns, it is possible to appropriately untwist the yarn ends or to obtain a tapered yarn end shape that is suitable for splicing. By equipping an automatic winder with the pneumatic splicing device equipped with the yarn end untwisting device according to the present invention, it is possible to expect good splicing of the threads in either twisting direction.

[Brief explanation of the drawing]

FIG. 1 shows a pneumatic yarn splicing device equipped with a yarn end untwisting device according to the present invention installed in an automatic winder (not shown), and guiding yarn on the package side and yarn on the bobbin side when cutting the yarn. FIG. FIG. 2 is a cross-sectional view illustrating the vicinity of the nozzle vibrator shown in FIG. 1, and FIGS. 3 and 4 are schematic cross-sectional views showing the jet flow inside the nozzle pipe. FIGS. 5 and 6 are schematic cross-sectional views showing the jet flow inside the nozzle pipe in the second embodiment. FIG. 7 is a sectional view illustrating the vicinity of the nozzle pipe portion in the third embodiment, and FIG. 8 is a sectional view showing the ejection flow inside the nozzle pipe in the third embodiment. 3...Pneumatic splicing device 26% 35.40...Nozzle pipe 27.33.3
4.41...Blowout hole 29.30.31.32.43... Conduit lA 50 Warehouse 6 diagram

Claims (1)

[Claims] The end of the yarn to be spliced is placed in a nozzle vibrator under the action of a jet stream ejected from a jet hole drilled in the nozzle vibrator, and the yarn end is untwisted or the fibers at the tip of the yarn end are separated and removed. , a pneumatic yarn splicing device that aligns each yarn end and performs yarn splicing by applying a different air flow, the pneumatic yarn splicing device being characterized by changing the ejection position of the jet stream in the nozzle vibrator with respect to the yarn-specific twisting direction. A method for untwisting yarn ends in a yarn splicing device.