JPH0525714A - Production device of three-layer structure yarn - Google Patents

Abstract

PURPOSE:To surely detect a state of fiber bundle or filament in the case of not feeding even if the ratio of one of the fiber bundle and filament to be mixed in the whole yarn is small. CONSTITUTION:In a production device 1 of three-layer structure yarn wherein three kinds of fibers 8, 11 and 29 are independently introduced to a draft part 2 and spun into one yarn 28 of three-layer structure, yarn guide parts are equipped with end breakage detecting feelers 29, 30 and 31, respectively and stopping of feed of the fibers 8, 11 and 29 is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a yarn having a three-layer structure by drafting a sliver and mixing different kinds of fibers during the draft.

[0002]

2. Description of the Related Art A spinning device is used in which a sliver is drafted by a multi-stage draft roller and then spinning is performed by a swirling air flow in an air spinning nozzle. A draft part in such a spinning device has a front roller consisting of a pair of upper and lower parts in order from the air spinning nozzle side, a second roller with an apron belt, a three-wire type consisting of a back roller, and a plurality of draft parts between the back roller and the second roller. There are four-wire type and five-wire type that are provided with rollers.

When manufacturing yarn with this spinning device,
In a normal draft part for drafting short fibers such as cotton, a fiber bundle of short fibers such as polyester staple is provided at the inlet side of the back roller or between the back roller and the second roller, that is, at the inlet side of the second roller. Is introduced to produce a two-layered yarn called a blended yarn. When such spinning is performed, a polyester staple is hardly twisted and a core is formed at the center of the yarn, and a two-layer structured yarn having a structure in which cotton fibers are wound around the core is obtained. On the other hand, when manufacturing yarn using the spinning machine, a long draft of polyester, nylon, glass fiber, etc. is provided between the second roller and the front roller, that is, at the entrance side of the front roller, in the ordinary draft system of short fibers. By introducing the yarn of fiber and applying it to the spinning device,
It has been practiced to produce a two-layered yarn called core yarn. When such spinning is carried out, a two-layer structure yarn having a structure in which long fibers are hardly twisted to form a core at the center of the yarn and short fibers are wound around the core is obtained.

It has been proposed to produce a three-layer structured yarn as a means for forming yarns of a greater variety of properties than the two-layer structured yarn as described above. According to it, a short fiber bundle is introduced into the draft part from the upstream side of the back roller, a short fiber bundle of a different type from the above-mentioned fiber bundle is further introduced between the back roller and the second roller, and the short fiber bundle is introduced between the second roller and the front roller. Introduce yarn of long fiber. As a result, the long fibers and the fiber bundle introduced from between the back roller and the second roller form a core without twisting, and the fibers introduced from the upstream side of the back roller are twisted and wound around the core. The three-layer structured yarn is formed.

In the above-mentioned apparatus for producing a three-layer structured yarn, when a production apparatus having substantially the same structure is used in accordance with the conventional two-layer structured yarn producing apparatus, the fiber bundles or fibers may be cut off. When it disappears, a signal indicating that the thickness is abnormal is output from the slab catcher that detects the property of the spun yarn, and the state is detected.

However, the slab catcher outputs a signal when the thread thickness exceeds a predetermined allowable range, but if the allowable range is too narrow, an abnormal signal is output even when there is no abnormality. Therefore, a large allowable range is set because it may cause a malfunction. On the other hand, at the time of manufacturing a three-layer structure yarn, when the proportion of any one fiber bundle or long fiber in the whole yarn is
When the fiber bundle or long fiber is not supplied, if the ratio of the remaining fiber bundle or long fiber is close to the allowable error limit of the slab catcher, do not output an abnormal signal from the slab catcher. was there. For this reason, there has been a problem that spinning is continued even if any one of the fibers is out of supply, and defective yarns that do not include the out-of-supply fiber are continuously produced.

[0007]

SUMMARY OF THE INVENTION In view of the above, the present invention ensures that even if one of the mixed fiber bundles or long fibers occupies a small proportion of the whole yarn, it is surely kept in that state when it is not supplied. It is an object of the present invention to detect defective yarn and prevent defective yarn from being produced.

[0008]

In a device for producing a three-layer structure yarn, three types of fibers are independently introduced into different parts of a draft part, and one yarn having a three-layer structure is spun, A yarn breakage detection feeler is provided in each fiber introduction portion, and the fiber breakage is detected.

[0009]

When one of the three types of fibers to be introduced is not supplied, the yarn breakage detection feeler provided in the supply section operates to detect that no fiber is supplied.
Then, based on the detection signal, even the uncut fiber bundle is once cut and the operation of the machine stand is stopped.

[0010]

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

The draft part 2 of the three-layer structure yarn producing apparatus 1 is a three-wire type in the illustrated embodiment, and the back roller 3,
It is composed of a middle (second) roller 5 mounted with an apron belt 4 and a front roller 6.

On the upstream side of the draft part 2, a can 7
Second fiber bundle 11, which is the first fiber that is drawn from the first part, is introduced into the back roller 3 of the draft part 2, and second fiber bundle 11 that is the second fiber for blending is drawn from the can 10. Second introduction pipe introduced to the roller 5
Provide 12 The second introduction tube 12 has a conduit 13 at its tip for guiding the second fiber bundle 11 to the upstream side of the second roller 5. The second introducing pipe 12 may be of the same type as the first introducing pipe 9, but the second fiber bundle 11 for blending is often thinner than the first fiber bundle 8, and thus the second introducing pipe 12 In order to make it easier to pass it through the second feed pipe, as shown in FIG.
14 and even a cutter for when to stop blending 1
5, and a clamper 16 for clamping the cut fiber bundle end may be provided in the second introduction tube 12. The long fiber yarn 17 which is the third fiber is pulled out from the bobbin 18 and supplied to the upstream side of the front roller 6, and the device therefor is the second
Similar to the device for introducing the fiber bundle 11 of, the third introducing pipe 18 is followed by a feeding device 20, a cutter 21, a clamper 22, and a conduit 23,
The conduit 23 is open upstream of the front roller 6.

On the downstream side of the draft part 2, an air spinning nozzle 24, a cutter 25, a delivery roller 26, and a slab catcher 27 are provided along the yarn path, and a winding device (not shown) for winding the spun yarn 28. Is further provided below. As the air spinning nozzle 24, for example, a known one shown in Japanese Patent Publication No. 56-31370 is used.

Thread breakage detection feelers 29, 30 and 31 are provided in the passages of the cans 7 and 10, the first and second fiber bundles 8 and 11 drawn out from the bobbin 18, and the yarn 17 of long fiber, respectively.
The presence or absence of cutting of the first and second fiber bundles 8 and 11 and the long fiber yarn 17 is detected. The yarn breakage detection feelers 29, 30, 31 send the signal to the control device 32. The control device 32 drives the solenoid 33 when the yarn break signal is received, and the cutters 15 and 21 and the clamper 1 provided on the second fiber bundle supply path and the long fiber supply path.
6 and 22 are actuated, the cutter 25 provided in the yarn supply path is actuated, and the back roller brake 34 is actuated to stop the rotation of the back roller 3.

The first fiber bundle 8 in the first can 7 is an introduction tube 9
From the draft part 2, it is drafted through a pair of upper and lower back rollers 3, a second roller 5 with an apron belt 4 and a front roller 6, and enters a pneumatic spinning nozzle 24 for spinning. On the other hand, the second fiber bundle 11 in the second can 10
Is guided from the second introduction pipe 12 through the feeding device 14, the clamper 16 and the cutter 15 and guided by the conduit 13 so as to draft between the back roller 3 and the second roller 5 and between the back roller 3 and the second roller 5. It is introduced onto the first fiber bundles 8 which have been set. After that, the second fiber bundle 11 and the first fiber bundle 8 are both drafted between the second roller 5 and the front roller 6, and the long fiber yarn as the third fiber of the bobbin 18 is further drawn.
Reference numeral 17 designates a feeding device 20, a clamper 22, and a feeding device 20 via a third introducing pipe 19.
After passing through the cutter 21, the second roller 5 is guided by the conduit 23.
And the front roller 6 are fed between the first fiber bundle 8 and the second fiber bundle 11 which are drafted as described above, and these fibers are in a three-layer state to form the front roller 6
And enters the air spinning nozzle 24.

In the air-spinning nozzle 24, among these fibers 8, 11, 17 the long fiber yarn 17 is hardly twisted as in the conventional core yarn, and the short fiber 8 is also as in the conventional blend yarn. Almost no twist is applied, and the short fibers 11 are entangled and spun around the long fibers 17 and the short fibers 8 in a twisted state. As a result, as shown in FIG. 4, the long fibers 17 and the short fibers 8 have the same form as the core of the conventional core yarn and the blend yarn, and the short fibers 11 have the same form as the peripheral fibers of the conventional core yarn and the blend yarn. Therefore, it is possible to obtain various types of yarns having different properties and textures from the two-layer structure yarn.

The spun yarn 28 is wound up from a pneumatic spinning nozzle 24 through a delivery roller 26 and a slab catcher 27 into a package (not shown). A first yarn breakage detection feeler 29 is provided in the supply path of the first fiber bundle 8, a second yarn breakage detection feeler 30 is provided in the supply path of the second fiber bundle, and a long fiber yarn 17 is supplied. A third yarn breakage detection feeler 31 is provided on the path, and each yarn breakage feeler 29, 30, 31 sends its signal to the control device 32 when the yarn breakage state is detected. Controller 32
When the yarn break signal is received, the solenoid 33 is deactivated, the cutter 15 and the clamper 16 provided in the second fiber bundle supply path are activated, and the cutter 21 and the clamper provided in the supply path of the long fiber thread 17 are provided. 22 is operated, the cutter 25 provided in the spinning supply path is also operated, and the back roller brake 34 is operated to stop the rotation of the back roller 3.

Although various circuits can be adopted in the control device 32, for example, as shown in FIG. 5, the operation switch YF27 of the slab catcher 27 and the relay R1 are connected in series, and the same is true for the first fiber bundle. The operation switch F27 of the yarn breaker feeler 29 and the relay R2 in series, and the operation switch F30 of the yarn breaker feeler 30 of the second fiber bundle and the relay R3 in series,
The operation switch F31 of the filament breaker 31 for long fibers and the relay R4 are connected in series, these sets are connected in parallel, and the switches RSW1, RSW2, RSW3, RSW4 are operated by the relays R1, R2, R3, R4. And the solenoid 33 are connected in series.

When any feeler including the slab catcher 27 detects a yarn breakage by such a circuit configuration, any one of the corresponding relays R1, R2, R3 and R4 is activated, and as a result, one of the relay switches is activated. RSW1, RS
Since W2, RSW3 and RSW4 are cut off, the solenoid 32 is de-energized and the cutters 15, 21, 25 and the back roller brake 34 are operated as described above. As a result, when the supply of any one fiber is cut off, the supply of not only the cut-off fiber but also the cut-off fiber to the pneumatic spinning nozzle 24 is cut off, and the spinning is interrupted. For this reason, defective yarns will not be continuously produced and will not be wound around the package.

[0020]

Since the present invention is configured as described above, it is possible to reliably detect the yarn breakage state even when the supply of any of the three types of separately supplied fibers is stopped, and it is possible to detect defective yarns. It can be prevented from continuing to be manufactured.

[Brief description of drawings]

FIG. 1 is an overall schematic diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the draft part portion.

FIG. 3 is a front view of a front roller portion.

FIG. 4 is a perspective view of a manufactured yarn.

FIG. 5 is a circuit diagram of a control device.

[Explanation of symbols]

 1 Device for producing three-layer structure yarn 2 Draft part 8 First fiber bundle 9 First introduction pipe 11 Second fiber bundle 12 Second introduction pipe 17 Third fiber bundle 19 Third introduction pipe 29 First Thread breaker detection feeler 30 Second thread breakage detection feeler 31 Third thread breakage detection feeler 32 Controller 33 Solenoid

Claims (1)

Claims: 1. An apparatus for producing a three-layer structure yarn in which three types of fibers are independently introduced into different parts of a draft part and one yarn having a three-layer structure is spun. 3. In the apparatus for producing a three-layer structure yarn, a yarn breakage detection feeler is provided in each fiber introduction part to detect the supply breakage of individual fibers.