JPS5874470A - Pneumatic yarn ending device - Google Patents

Abstract

PURPOSE:To prevent the ends of strands from projecting unevenly to produce a knot-like small projection by forming portions of each yarn end to be untwisted and enveloped in a continuous groove and applying to the yarn end a jet air stream directing to the opening of the groove in the groove. CONSTITUTION:The yarn end YP on the package side is fitted in a groove 57 by turning a swivel guide plate 47, and the yarn end YB on the bobbin side is clamped by a clamping device 41 and inserted from an inclined surface 6a into a yarn guide groove 6 by turning of filament collecting levers 37, 38. Subsequently, each yarn end is cut by cutters 30, 35, and when pressurized air is jetted from nozzles 13, 14, the yarn ends are untwisted by a whirl in yarn end untwisting grooves 3, 5. After that, the filament collecting levers 37, 38 are again operated to put YP on YB to be entwined with each other by the whirl of a jet air stream from a nozzle 12, and further turned to twist the yarn ends so as to produce entwinement of strand ends on both sides. Since the nozzles 13, 14 also emit jet air streams during such operation, the yarn ends are drawn by the outward air stream so as to produce no projecting portion such as an edge.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic yarn splicing device, in which the fibers at the yarn ends are untwisted and spliced in a series of yarn guide grooves in a substantially straight state. The purpose is to sufficiently and completely untwist and separate the fibers at the spliced portion to completely envelop the fibers.

In the pneumatic yarn splicing device, the yarn ends to be spliced are untwisted, the fibers at the yarn ends are separated, the yarn ends to be spliced are aligned, and pressurized air is blown onto the waist using a swirling flow.
Twisting is caused in the alignment portion to cause the fibers at each yarn end to be enveloped, and the yarn ends are unified and spliced.

During the above process, suction is applied to the yarn ends to untwist the yarn ends.
Conventionally, a control nozzle that blows a jet of air onto the yarn ends to untwist them, a yarn splicing member that straightens the untwisted yarn ends and heats them by blowing a jet of air to the pulling section, etc., have conventionally been provided separately. In particular, the control nozzle untwists the yarn end by bending the end of the yarn drawn into the yarn splicing device in a direction that intersects with the yarn pulling direction, and transfers the untwisted yarn end back to the control nozzle. Because the yarn is pulled out from the yarn end, there may be a portion where the fibers at the end of the yarn are insufficiently defibrated and separated.

In addition, the yarn splicing member supports only a limited portion of the yarn end where the yarn is spliced, and does not support the entire processing system. It was also thought that sometimes the fibers would sag between the unsupported parts.

Therefore, in the device of the present invention, the ends of yarn are untwisted.

Yarn splicing processes such as heating envelopment are carried out within a series of yarn guide grooves.
This makes it possible to perform the process while keeping the yarn almost straight.

An embodiment of the yarn splicing device 100 of the present invention for tying a bobbin side end yarn YB and a package side end yarn YP will be described below with reference to the drawings.

Reference numeral 1 designates a nozzle block, which includes a yarn end introduction groove of the rod 1, i.e., a bobbin side yarn end introduction groove 2, a first yarn end untwisting groove, i.e., a bobbin side yarn end untwisting groove 3, and a second yarn end introduction groove, i.e. Package side yarn end introduction groove 4, second yarn end untwisting groove, that is, package side yarn end untwisting groove 5
A thread guide groove 6 having an arcuate bottom is provided in an X-shape on the front surface. The X-shaped intersection of each part is the yarn twisting part 7
It is said that A cover 9 is provided in each of the untwisting grooves 3 and 5 and the yarn twisting part 7 except for some slits 8 for the yarn path,
In the core portion, the thread guide groove 6 has a substantially circular cross section. Guide plates 10 and 11 are provided at the ends of the respective parts 2.3 and 4.5, that is, at the end faces of the nozzle block 1. In the yarn twisting section 7, a gas jet nozzle 12 is opened in the tangential direction of the yarn guide groove 6 and located on an imaginary plane perpendicular to the yarn guide groove 6 in the waist portion. In this embodiment, the gas ejection nozzle 12 is opened so that the gas ejected from the gas ejection nozzle 12 rotates counterclockwise within the yarn guide groove 6. The gas may be ejected in either direction. Bobbin side yarn end untwisting groove 3. Gas jet nozzles 13 and 14 are provided in the package side yarn end untwisting grooves 5, respectively. The gas jetting nozzle 13 opens to jet pressure gas in the tangential direction of the package side yarn end untwisting groove 3 and toward the open end. It opens in the tangential direction of the portion 5 so as to blow out pressurized gas toward the open end of the groove.

The gas jetting direction of the gas jetting nozzle 13.14 is the second direction.
As shown in cross section in Figures A and C, the nozzle 13 has a jet flow counterclockwise, and the nozzle 14 has a jet flow counterclockwise, so that the tangents of the yarn end untwisting grooves 3 and 6 However, this example is for the case where the treated yarn has two twists, and in the case of S twist, the gas jet nozzles 13 and 14 must be opened in the opposite direction to the above example. 15,1
6.17 is a conduit for sending pressurized gas to the nozzle 12.13.14, and is connected to a pressure source (not shown).

In the embodiment shown in FIG. 1, a cover 9 is provided in the thread guide groove 6.
Although a cover 18 as shown in FIGS. 3 and 4 may be provided. The cover 18 has a bobbin side yarn end untwisting groove 3. the bobbin side yarn end untwisting groove 3. A covering member 21 that covers the package side yarn end introducing groove 4, a covering member 22 that covers the thread twisting section 7, and a bobbin side yarn end introducing groove 2. A covering member 23 covering the package side yarn end untwisting groove 5 is provided respectively. Each covering member 21, 22.23 (7) has a respective part 2.3 on the lower surface.
, 4.5 to form four parts, each part 2.3, 4.6 forming a cylindrical thread guide groove. In this embodiment, when the yarn is first introduced into the nozzle block 1, the arm-shaped body 20 is pivoted about the shaft 19 by a mechanism not shown, and the yarn guide groove 6 is opened.

A cutter 31 is provided outside the opening of the bobbin side yarn end untwisting groove 3. The cutter 31 includes a fixed blade 32 fixed to the nozzle block 1 and a movable blade 33 fitted to the fixed blade 32 so as to be rotatable.
Therefore, the movable blade 33 is engaged with a crank 34 that swings by a cam mechanism (not shown). Reference numeral 35 denotes a spacer, and by appropriately replacing spacers with different thicknesses, the distance between the nozzle flock 1 and the nozzle flock 1 can be adjusted. A cutter 35 is also provided outside the opening of the package side yarn end untwisting groove 5.

The structure of the cutter 35 is similar to that of the cutter 43.

A pair of thread shifting levers 37 and 38 are provided on the sides of the nozzle block 1 and are fixed above and below the support shaft 36 and rotate. 39 is a stopper for the thread shifting lever 38. A rod 40 is pivotally supported on the thread shifting lever 37, and when the iron 40 is pulled by the operation of a cam mechanism (not shown), the thread shifting lever 37 makes a swinging motion. Reference numeral 41 denotes a bobbin side yarn end clamping device, which is composed of a turning lever 42 and a stopper 43. Reference numeral 44 denotes a package side yarn end clamping device, which is composed of a turning lever 45 and a stopper 46.

A fixed guide plate 47 is located below the bobbin side yarn end clamp device.
Then, the turning guide plate 48 is installed. The guide groove 49 of the fixed guide plate 47 coincides with the opening of the relief groove 51 of the swing guide plate 48, and the swing guide plate 48 supported by the shaft 5o fits into the guide groove 49 of the fixed guide plate 47 during its swing movement. A certain yarn YP is locked to the hook portion 52 and pushed out from the groove 49 and introduced into the escape groove 51.

In this example, the device of the present invention was used for splicing yarn when winding yarn from a bobbin installed at the bottom of the machine stand in a yarn twisting machine or the like onto a package installed at the top of the machine stand.
The device of the present invention is provided with a package in two parts and a bobbin in the lower part.

Next, the operation of the device of the present invention will be explained.

When the detection device 55 detects that the yarn is cut during rewinding or that the yarn layer on the bobbin is exhausted, the package winding drum is stopped while the yarn splicing operation is started.

First, the package side yarn end YP is guided to the yarn splicing device 100 in a state where the yarn end is suctioned by a suction arm (not shown). The package side yarn end sucked by the suction arm is transferred to the fixed guide plate 47. After the yarn end YP is guided into the guide groove 49 of the rotation guide plate 48 and detected by the detection device 65, the rotation guide plate 47 rotates around the shaft 5o to fit the yarn YP into the relief groove 57. . Next, a bobbin-side suction arm (not shown) sucks the bobbin-side yarn end YB, guides the yarn YB to the yarn splicing device 100, and stops the yarn. At this time, the bobbin-side yarn end YB is clamped by the swing lever 42 and stopper 43 of the bobbin-side clamp device 141 via the hook portion 52 of the swing guide plate 47. When the above-mentioned movements of the bobbin side and package side chryso arms (not shown) are completed, the thread shifting levers 37 and 38 rotate, and the threads iYP, YB on the package side and the bobbin side are rotated.
is guided into the guide grooves 53 and 54 of the guides 10 and 11, and is inserted from the inclined surface 6a into the thread guide groove 6 through the slit 8. Then, the cutter 30.degree. 35 cuts off the yarn end that has been sucked into the suction nozzle. The position at which the part is cut is related to the length of the seam to be spliced, and also to the appearance, texture and binding strength of the spliced seam.

Note that after inserting the yarn ends YB and YP into the yarn guide groove 6, the yarn ends YB and YP are
By pressing the yarn ends with appropriate means, it is possible to prevent the vibrations of the yarn ends from being transmitted to the other end during untwisting, and it is possible to untwist the yarn ends more reliably and in a good manner.

Next, the yarn shifting lever 37 is turned in a direction away from the yarn at the same time or in succession when pressurized gas is jetted from the gas jetting nozzles 13 and 14. At this time, the yarn ends YB and YP receive the jet of gas from the gas jet nozzles 13 and 14, and in the yarn end untwisting grooves 3 and 5, in this embodiment, the jet in the direction of untwisting the Z twist. The yarn ends are untwisted by the vortex created by the air current.

The degree of untwisting can be adjusted as appropriate by changing the pressure and ejection time of the gas ejected from the gas ejection nozzles 13 and 14.

Next, the yarn shifting levers 37 and 38 are operated again and the yarn ends are pulled together, the package side yarn end and the bobbin side yarn end are positioned so that they overlap, and pressurized gas is applied to the overlapping yarn ends using the gas jet nozzle. After blowing, the untwisted yarn ends are entangled by the swirling flow generated there, and after being integrated, each time the core part turns, twist is caused in the integrated part, or: The fiber ends are entangled on both sides of the part, and the splicing is completed without creating any corners. During the above yarn splicing operation, the gas jet no.
Since gas is ejected from yarn end untwisting grooves 3 and 14, an air current is generated in the yarn end untwisting grooves 3 and 6 toward the opening direction, and the untwisted yarn ends that are twisted together in the yarn twisting section 7 are The fibers at the ends of the yarn are always pulled along with the airflow going outward from the yarn twisting section 7, so when the fiber ends are connected as a yarn, the fiber ends naturally become entangled with the yarn and form an angle. ) etc. will not occur.

When the yarn splicing is completed, the yarn shifting levers 37 and 38 are disengaged from the yarns YB and YP, and the knotted yarns YB and YP pass through the slit 8 and exit from the yarn guide groove 6, returning to the normal rewind state.

In the second embodiment, there are no slits as in the first embodiment, but covering members 21, 22, 23 are provided. Therefore, when inserting the thread into the thread guide groove 6, the arm-shaped body 20 is rotated by a cam mechanism (not shown), and the covering member 21.2 is rotated.
2.23 is listed above.

As described above, the device of the present invention is a yarn splicing device that applies compressed fluid to the overlapping yarn end portions to cause the fibers of the yarn end portions to wrap around each other. A series of continuous grooves are formed, into which the yarn ends to be spliced are introduced, and within the grooves, a jet stream directed toward the groove opening is applied to the yarn ends.
Because force is always applied to the yarn ends in the pulling direction, the splicing is performed with the untwisted fibers aligned in the same direction, causing the fiber ends to protrude unevenly and form small knots. It does not cause any protrusions.

Moreover, since the splicing process is carried out inside the grooved body, even if the yarn is rotated by the jet stream, it rotates within a series of grooves, so the cross section of the yarn will not be made asymmetric.

[Brief explanation of the drawing]

Figure 1 is a front view, and Figure 2A is taken along line C--C in Figure 1. Figure 2B is the line C-C in Figure 1, and Figure 2C is the line C-C in Figure 1.
3 is a front view of another embodiment, FIG. 4A is a cross-sectional view of the line C-C in FIG. 3, FIG. 4B is a cross-sectional view of the line C-C in FIG. 3, and FIG. are sectional views taken along line C-C in Figure 3, and Figure 5.
The figure is a plan view, and FIG. 6 is a sectional view of the cutter. 1... Nozzle block, 2... First (bobbin side)
Yarn end introduction groove, 3...first (bobbin side) yarn end untwisting groove. 4...Second (package side) yarn end introduction groove. 5... Second (package side) yarn end untwisting groove. 6... Yarn guide groove, 57... Yarn twisting part. Patent Applicant Murata Machinery Co., Ltd. Agent Patent Attorney Masaru Ohno Rei No Rei No Ryunosuke Kabuto 1 Kokuichi 2 Mi'9 3 Houses 9G Grave 40'lK5shi'O 469 No. 6a '5Q Procedural Amendment ■, Minor case indication 1982 Patent Application No. 171583 2, Name of the invention Pneumatic yarn splicing device 3, Relationship with the sound case to be amended Patent applicant name (6812) Katsu Ohno Iguchi Page 6 of the specification, lines 3 and 4, "31" is corrected to "30". 2. Line 8, ``Correct 35j to ``31''. 3 On the same line 12, overwrite r431 with "30". 4. Delete "swivel guide plate 48" on page 8, line 7 of the specification. 5. On the same line 9, correct l'-47j to "48". 6 Correct ``57'' in line 10 to ``151.'' 7. Lines 13 to 16, [At this time... is done. ”
Delete. 8. Insert the following sentence after "is done" on page 9 of the specification, line 2. [At this time, the bobbin side yarn end YB is
8, and is clamped by the group lever 42 of the bobbin side clamping device 41 and the stopper 43. Also, package side thread end Y'. P is the pivot lever 35 of the package-side clamping device 44;
and a stopper 36. 9. Figures 1 and 6 of the drawings are corrected as shown in the attached sheet. 'l7,\

Claims (1)

[Claims] The four grooves provided in the nozzle block, the first yarn end introduction groove, the first yarn end untwisting groove, the second yarn end introduction groove, and the second yarn end untwisting groove, are crossed in an X shape. The intersection of the yarn guide groove formed by the yarn is set as a yarn twisting part, and a gas jet nozzle is provided in the groove wall of the twisting part in a tangential direction on a virtual cross section at the waist part,
□ A pneumatic yarn splicing device 0 in which gas jetting nozzles are provided on the groove walls of the first and second yarn end untwisting grooves, respectively, in a tangential direction in the virtual cross section of the grooves and in the groove opening direction.