JPS646105B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for untwisting yarn ends for double yarns.

As a spun yarn splicing device, it uses fluid, and has no knots compared to conventional fisherman's knots and weaver knots, and is superior in terms of yarn breakage and yarn snags during knitting and weaving processes. There is a certain yarn splicing device. In other words, a pneumatic yarn splicing device that uses air as a fluid inserts two yarn ends aligned into a yarn splicing hole, and creates a seam by applying an air flow to the overlapping portion of both yarn ends. However, prior to the splicing operation, untwisting the yarn end or separating and removing the fibers at the tip of the yarn end to give the yarn end a tapered shape is not only powerful but also aesthetically pleasing. This is a very effective means of obtaining seams.

For example, in Japanese Patent Application No. 54-7350 (Japanese Patent Publication No. 56-47108), the present applicant has already proposed that after suctioning the yarn end into the yarn end control nozzle and separating the fibers at the tips of the yarn ends, the yarn splicing nozzle The application has been filed for a device that performs yarn splicing by applying an air jet to both yarn ends that are pulled together, but in this device, the nozzle for untwisting the yarn ends, called the yarn end control nozzle, is It is suitable for untwisting yarn where the so-called unique twist of a single yarn has only a twist in one direction of Z or S, and there is no problem. When the yarn to be spliced is a double yarn, it was impossible to untwist it with the above-mentioned untwisting nozzle. In other words, in so-called double yarns, which are made by twisting two or more single yarns together, there is a difference between the unique twist of each single yarn (hereinafter referred to as "ply twist") and the double yarn obtained by twisting multiple single yarns together. Since the twist peculiar to double yarns (hereinafter referred to as ply twist) is in the stretching direction, such double yarns cannot be untwisted with the above-mentioned untwisting nozzle. For example, in the case of two twin yarns with S twist as the first twist and Z twist as the final twist, if the yarn ends of the twin yarns are turned in one direction, for example in the direction of unraveling the Z twist, the top twist is Z twisted. The twist can be untwisted and the two single yarns can be separated, but
Furthermore, the S-twist of the single yarn is not untwisted, and in some cases, each single yarn is twisted together in the S direction, and the ply twist becomes a double yarn in the S direction.

The present invention is aimed at solving the above-mentioned problems, and includes forming fluid injection holes at a plurality of different positions in the axial direction of an untwisting nozzle pipe, and injecting fluid into the pipe entrance side among the plurality of injection holes. The present invention provides a yarn end untwisting device in which the hole is an injection hole inclined in the axial direction of the untwisting nozzle pipe and in the depth direction.

Embodiments of the present invention will be described below with reference to the drawings.

In addition, "thread" used in the following explanation means double yarn, and each single yarn constituting the double yarn is a so-called staple fiber made by short-cutting natural fibers such as cotton, wool, linen, or synthetic long fibers. , or a spun yarn made by bundling these mixed fibers, each single yarn has a unique number of twists per unit length due to the spinning process, and the twists are spread over the entire length of the single yarn. In addition, in double yarns obtained by twisting multiple single yarns, the twist direction is opposite to the twist direction unique to the single yarns, and the twists are also distributed uniformly over the entire length of the yarn. Define it as something that does.

Furthermore, "untwisting" 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 "twisting".

FIG. 1 shows an example of an automatic winder in which a pneumatic yarn splicing device is fixed to a winding unit. A shaft 2 and a suction pipe 3 are installed between each side frame 1, and a winding unit 4 is rotatably supported by the shaft 2. During operation, the winding unit 4 is also placed on the pipe 3. It is fixed by appropriate means.

In the winding unit 4, the yarn Y pulled out from the pipe yarn B on the peg 5 is guided by a guide 6, a tensor 7,
After passing through a slab catcher 8 and the like, it is wound onto a package P rotated by a traverse drum 9. At this time,
Slab catcher 8 removes uneven running yarn, slabs, etc.
When detected, a cutter provided inside or near the slab catcher operates to cut the running yarn Y, and while winding is stopped, a yarn splicing operation is performed. That is, the suction mouth 10 operates to guide the yarn YP on the package side, and the relay pipe 11 guides the yarn YB on the tube yarn side to the yarn splicing device 12 installed at a position away from the normal running path Y. After the yarn is spliced, the winding is resumed. Since the splicing device 12 uses fluid such as compressed air, a conduit 14 is connected between the splicing device 12 and a compressed air supply pipe 13 that runs along the winding unit.

An embodiment of the yarn splicing device 12 is shown in FIGS. 2 and 3. During normal rewinding, thread Y11 is on bobbin B.
From there, a route is taken that passes through the slab catcher 8, a fixed guide 16 provided on one side of the slab catcher 8, and swiveling guides 17 and 18 provided on both sides, and then passes above the yarn splicing device 12 and reaches the package P. There is.

The yarn splicing device 12 basically includes a yarn splicing member 101,
Yarn pressing device 102, untwisting nozzles 103, 104,
Thread shifting lever 105, thread cutting device 106, 10
7, and yarn clamp devices 108 and 109, the suction arm 10 and the suction ports at the ends of the relay pipes 11 pivot above the yarn splicing device 12 so as to intersect with each other, and clamp the yarn ends on the package cage side. YP, suction the yarn end YB on the bobbin side, move it to the outside of the yarn splicing device, and stop.

Note that the suction arm 10 and the relay pipe 11 do not operate at the same time, but with a slight time lag. That is, first, the yarn end YP on the package cage side is pivoted to the outside of the yarn splicing device by the suction mouth 10 and stopped, and almost at the same time, the pivot lever 20 of the clamp device 109 on the package P side is activated by a control cam (not shown). It rotates and stops when it comes into contact with the support block 21 which is fixed at a fixed position. At this time, the thread YP is moved while being hung on the swing lever 20, and the thread YP moves between the support block 21 and the swing lever 2.
It is held between 0 and 0.

On the other hand, while the pivot lever 20 is operating, the fixed guide 16 and the pivot guides 17, 18
The yarn YP located above enters the guide groove 19 along the inclined surfaces 16a, 17a, 18a of the guides 16, 17, 18, and is detected by the detection device 8 installed at the same position as the guide groove 19. Checking the presence or absence of YP,
Then, the suction mouse is used to check whether two threads have been suctioned by mistake.
After confirming YP, the swivel guides 17 and 18 are rotated counterclockwise around the spindle 22 by a control cam (not shown), and the thread YP is removed from the slub catcher 8 and moved to the swivel guides 17 and 18. Relief groove 17b,
18b.

Furthermore, almost at the same time as the pivoting guides 17 and 18 rotate, the yarn end YB on the bobbin B side is sucked by the relay pipe 11, and the suction mouth 10
It turns in the opposite direction, moves to the outside of the yarn splicing device, and stops. Almost at the same time as the relay pipe 11 stops rotating, the support plate 2 of the clamping device 108
3a is a guide plate 24 by a control cam (not shown).
The support block 23 is moved in the same direction as the turning lever 20 along with the thread YB, and is fixed at a fixed position.
b, and the thread YB is held between the support plate 23a and the support block 23b.

A yarn splicing member 10 is located approximately in the center of the yarn splicing device 12.
1 is installed, and on both sides of the yarn splicing member 101, as shown in FIG.
6. Yarn presser 102, untwisting nozzle 103, 10
4. Guide plates 27a, 27b, guide rods 28a, 28b, and thread cutting device 10
6, 107, and fork guides 29, 30 are arranged in sequence. Further, a support shaft 3 is provided on the side of the yarn splicing member 101.
1 and a lever 3 that pivots around the support shaft 31 as a fulcrum.
A thread shifting lever 105 consisting of 2 and 33 is installed. The thread shifting lever 105 moves the threads YP and YB after the suction arm and the relay pipe guide each other's thread ends YP and YB to the outside of the thread splicing device 12.
is guided in the direction of the yarn splicing device 12. The rotation range of the thread shifting lever 105 is limited to the rotation range of the stopper 3 installed between the fork guide 29 and the thread clamp device 108.
This is the range that touches 4.

An example of the yarn splicing member 101 is shown in FIG. The yarn splicing member 101 is screwed 53 to the bracket 52 via the front plate 51, and a cylindrical yarn splicing hole 54 is formed approximately in the center of the yarn splicing member 101, and the yarn YP, A slit 55 suitable for inserting YB is formed across the entire tangential direction of the yarn joining hole 54, and
Fluid injection nozzle holes 56, 57 opening tangentially to
is drilled. The nozzle holes 56 and 57 are provided at different positions in the direction perpendicular to the plane of the paper, and the swirling directions of the fluid streams ejected from the nozzle openings are opposite to each other.

Next, the yarn end untwisting nozzles 103 and 104 will be explained. Nozzles 103 and 104 have similar structures, and only one will be described, with nozzle 10
3 and 104 have different mounting angles. In FIG. 5, a nozzle pipe 61 that is rotatable around an axis and slidable in the axial direction is fitted into the block 52, and the nozzle pipe 61 has two fluid ejection holes 63 and 64. It is formed at a certain angle toward the axis of the nozzle pipe 61 and in the depth direction of the pipe. Due to this angle, a suction force is generated at the yarn end entrance opening 65 of the nozzle, and the cut yarn end is sucked. A compressed fluid supply passage 66 is formed in the block 52, and the fluid ejection holes 6 at the two positions are connected to each other.
It is connected to 3,64.

Examples of the nozzle pipe 61 are shown in FIGS. 6-11. The nozzle pipe 61 of the first embodiment shown in FIGS. 6 to 8 has compressed fluid ejection holes 63 and 64 at two different positions of the cylindrical pipe 61 at angles θ1 and θ2 with respect to the depth direction of the axis. , toward the center of the pipe, and is formed non-tangentially to the inner peripheral surface. Note that the two different positions mentioned above are two different positions in the axial direction of the pipe 61, and further around the axial center.
The notch 67 is a notch formed on the outer surface of the pipe through which the compressed fluid supplied from the passage 66 of the block 52 is ejected from the nozzle 64, creating a fluid passage between it and the inner peripheral surface of the block 52. It consists of

The nozzle pipe 68 of the second embodiment shown in FIGS. 9 to 11 has the same shape and size as the above embodiment, but one of the fluid ejection holes opens tangentially to the inner peripheral surface of the pipe. The difference is that That is, pipe 6
The spout hole 69 closer to the yarn end entrance opening of No. 8 is inclined in the depth direction toward the axis of the pipe.
On the other hand, the injection hole 70 at the back is inclined in the depth direction of the pipe, and the injection holes 69 and 70, which open tangentially to the inner circumferential surface of the pipe, are also located at positions shifted by 90 degrees as described above. Reference numeral 71 denotes a notch similar to the previous embodiment, which forms a fluid passage between the cutout and the inner circumferential surface of the block.

Note that the openings of the ejection holes 63 and 69 closer to the inlet side of each of the nozzle pipes 61 and 68 are suitably located at positions bisected by an imaginary plane passing through the central axis O of the pipes.
The opening of the jet hole 70, which opens tangentially, opens at a position that does not extend beyond the central axis of the pipe, that is, at a position that does not include the central axis of the inner circumferential surface of the pipe.

The spout holes 63 and 69 on the yarn entry side of the nozzle pipes 61 and 68 are for twisting and untwisting, and the spout holes 6 on the downstream side
4 and 70 are for pre-twisting and untwisting. The state in which such nozzle pipes are arranged on both sides of the yarn splicing member is the first
Shown in Figures 2 and 13. FIG. 12 shows a case where the nozzle pipe 61 of the first embodiment shown in FIGS. 6 to 8 is applied.
The top twist of yarns YP and YB is S twist, and the bottom twist is Z twist. The fluid ejected from the ejection hole 63 hits the inner circumferential wall in the direction of the arrow 72 and separates, and as a result, the positioned yarn ends YP and YB are untwisted.
Further, the fluid ejected from the ejection hole 64 located at the back is diverted in the direction of an arrow 73 as shown by the broken line, and the first twist (Z twist) of the yarn end is untwisted. The nozzles 103 and 104 are provided at points symmetrical positions with the yarn splicing hole 54 as the center.
4 is for untwisting the ends of the side yarns of the tube yarn.

Further, FIG. 13 shows an example in which the nozzle pipe 68 shown in FIGS. 9 to 11 is applied. That is, the nozzle pipes 68, 68 are arranged point-symmetrically with respect to the yarn splicing hole 54.
Fluid flows 74, 74, so that the fluid from the jet holes 69, 69 untwists the upper twist (S twist), and the fluid from the jet holes 70, 70 untwists the lower twist (Z twist).
and 75,75 are occurring.

Among the fluid flows, a fluid flow 72 for untwisting,
Reference numeral 74 denotes a fluid flow that heads toward the center of the nozzle pipe from the jet holes 63 and 69 formed on the inlet side of the nozzle pipes 61 and 68, and after hitting the inner wall facing the jet holes, it separates into a swirling flow with a swirling radius. It is a flow with a small amount of force and a strong swirling force. On the other hand, the fluid streams 73 and 75 for untwisting are located at the back of the nozzle pipe, and the jet holes 70 open tangentially to the inner circumferential wall of the pipe.
The fluid flow ejected from the pipe is a swirling flow with a large swirling radius.

Therefore, the upper twist (S twist) of the yarns YP and YB is untwisted by the fluid flows 72 and 74 with strong swirling force, and becomes two threads, and further, due to the action of the fluid flows 73 and 75, the upper twist is (Z-twist) is untwisted, the double yarn is untwisted as a whole, and a yarn end in which the fibers are almost parallel is formed.

Next, the yarn splicing operation by the yarn splicing device will be explained.

(B) Thread preparation and clamping process In FIG. 1, when the detection device 8 detects that the thread is cut during rewinding or that the thread layer on the bobbin is exhausted, the drum 9 stops rotating, and rotates one rotation (not shown). The clutch functions, and the splicing operation is performed by various control cams installed on a shaft rotating through the clutch or by various control cams interlocked with the shaft.

First, suction mouth 10, relay pipe 11
The yarn ends are suctioned at positions 10a and 11a shown in chain lines in FIG. and stops at a position outside the yarn splicing device.

That is, after the suction mouth 10 is operated and before the relay pipe 11 starts operating, the thread clamp device 109 on the package cage side shown in FIG. 2 is operated and the thread is clamped.
The yarn YP is held between the rotating lever 20 and the support block 21, and the yarn YP is introduced into the guide grooves 19 of the fixed guide 16 and the rotating guides 17 and 18 arranged near the detection device 8. A check is performed. Next, the rotating guide 17,1
8 rotates counterclockwise in FIG. 3 around the spindle 22 to remove the thread YP from the detection device 8, and
b, fit into 18b.

Further, the relay pipe sucks the yarn YB on the bobbin B side, rotates to a position outside the yarn splicing device 12, and stops.

At this time, the yarn YB is held between the support plate 23a and the support block 23b of the yarn clamp device 108.

(b) Thread pulling and cutting process When the thread clamping process is completed, the levers 32 and 3 of the thread pulling lever 105 shown in FIGS. 2 and 3
3 rotates around the spindle 31, and the threads YP,
YB is guided separately to each guide groove 29a, 29b, 30a, 30b of the fork guides 29, 30, and the yarn splicing hole 54 of the yarn splicing member 101 in FIG.
is inserted into the interior through the slit 55.

Next, the thread cutting devices 106, 107 cut the threads YP2, YB2 at a predetermined distance from the clamp devices 108, 109 as shown in FIG.

The position at which the yarn is cut is related to the length of the spliced seam, and affects the appearance, texture and seam strength of the spliced seam, and the cutting position differs depending on the yarn count.

That is, in FIG. 14, the yarns YP and YB on both sides of the yarn splicing member 101 are connected to the yarn clamping devices 108 and 10.
9, and the thread shifting lever 105 is operated, and the rod 31a shown in the third figure is moved in the direction of the arrow 31b by a control cam (not shown), so that the lever 3
Thread cutting is performed in a state where the threads 2 and 33 are pivoted clockwise around the support shaft 31.

Note that the thread shifting lever 105 and the cutting device 10
6, 107, the thread presser device 102 is on standby at the position shown in the 14th figure.

(c) Yarn end untwisting step Next, as shown in FIG. 15, when the yarn ends YP1, YB1 are sucked by the yarn end untwisting nozzles 103, 104, the yarn shifting lever 105 is activated at the same time or in succession. It moves in the direction R away from the yarn, and the yarn ends YP1, YB1 are sucked deep into the untwisting nozzle and are untwisted into a state suitable for splicing by the fluid jet as described above.

Note that the suction timing of the untwisting nozzles 103 and 104 is desirably started immediately before the yarn is cut by the cutting devices 106 and 107.

That is, when the yarn Y is cut, tension is applied to the yarn by the suction action of the suction mouth relay pipe, so the yarn ends YP1 and YB1, which are freed by the yarn cutting, are scattered and untwisted. nozzle 103,
This is because there is a possibility that the untwisting nozzle is away from the opening position of 104 and the yarn end suction is not performed by the untwisting nozzle.

The fluid is supplied to the untwisting nozzle by switching a valve using a solenoid (not shown).

(d) Yarn splicing process When the yarn ends YP1, YB1 are untwisted by the yarn end untwisting nozzles 103, 104 to a state suitable for yarn splicing, suction is performed by the untwisting nozzles 104, 103 and the fluid injection hole 63. At the same time or one after the other when the operations stop, the yarn shifting lever 105 operates again as shown in Fig. 16, and the yarn ends YP1, YB1 are pulled out from the untwisting nozzles 103, 104 and untwisted while guiding each other. The yarn ends are overlapped with each other at a predetermined position on the yarn splicing member.

At this time, one lever 32 of the thread shifting lever 105
At the same time, the thread presser device 102 is activated and rotates to the state shown in FIG. Strictly speaking, the yarn splicing hole 5 between the devices 108 and 109
4 and the thread shifting levers 32, 33 to bend the threads YP, YB.

The above-mentioned thread shifting lever 105 and thread pressing device 10
2, the yarn ends YP1, YB1 that had been inserted into the nozzle holes of the untwisting nozzles 103, 104 are drawn into the yarn splicing hole 54 of the yarn splicing member 101, and
The control plates 25, 26 and the yarn presser device 102 shown in FIGS. 4 and 4 position and set the yarn ends YP1, YB1 in contact with each other.

Next, after the yarn ends have been set, yarn splicing is performed by the swirling flow of compressed fluid injected from the fluid injection holes 56 and 57 shown in FIG.

That is, the first twist and the second twist are untwisted by the untwisting nozzles 103 and 104, and the fibers at the end of the yarn are opened and are in a substantially parallel state, and the fibers are released from the fluid injection holes 56 and 57 of the yarn splicing member. Due to the jet flow, the fibers at each end of the yarn mix, entangle, and coalesce, and are spliced into a single thread.

As described above, in the present invention, the fluid injection holes are formed at a plurality of different positions in the axial direction of the untwisted nozzle pipe, and among the plurality of injection holes, the injection hole on the pipe entry side is located at the center of the untwisted nozzle pipe. Since the injection hole is tilted towards the direction of the pipe and in the depth direction, the yarn end sucked into the untwisting nozzle pipe is first untwisted by the direct blow and branch flow ejected from the injection hole on the entrance side of the pipe. Further, the lower twist is untwisted by the fluid flow ejected from the injection hole located at the back, and as a result, the upper and lower twists of the double yarn are untwisted, and the yarn end is in a state suitable for splicing, and the fluid type yarn splicing device When the fibers are inserted into the fibers, the fibers that have been loosened into a parallel state are intertwined, combined, and twisted, allowing for a good fluid splicing.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing a winding unit of an automatic winder having a yarn splicing device, Fig. 2 is a front view showing an example of a pneumatic yarn splicing device, Fig. 3 is a plan view of the same, and Fig. 4 is a A cross-sectional plan view showing an example of a thread splicing member,
Fig. 5 is a partially sectional plan view showing the relationship between the yarn splicing member and the yarn end untwisting nozzle, Figures 6 to 8 are views showing examples of the nozzle pipe of the yarn end untwisting nozzle, and Figure 6 is the overall view. Figure 7 is a partially enlarged view, Figure 8 is a side view, Figure 9 is a side view.
11 are diagrams showing other embodiments of the nozzle pipe. FIG. 9 is an overall view, FIG. 10 is a partially enlarged view, FIG. 11 is a side view, and FIGS. 12 and 13 are views of the above nozzle pipe. FIGS. 14 to 16 are explanatory views showing the yarn splicing operation by the yarn splicing device. 61, 68... Nozzle pipe, 63, 64... Fluid injection hole, 69, 70... Fluid injection hole.

Claims (1)

[Claims] 1 Fluid injection holes are formed at two different positions in the direction along the axis of the untwisting nozzle pipe, and among the injection holes at the two positions, the injection hole on the entrance side of the untwisting nozzle pipe is aligned with the axis of the untwisting nozzle pipe. 1. An untwisting device for yarn ends for double yarns, characterized in that the nozzle pipe is inclined in the direction toward the back and in the depth direction, and the injection hole on the back side of the nozzle pipe is formed to be inclined at least in the depth direction.