JPS61252323A - Clearer apparatus for fasciated spinning frame - Google Patents

Abstract

PURPOSE:To prevent the unnecessary spreading of a silver, and prevent the formation of slub in the air-twisting of the silver, by attaching a suction port having a specific width to the suction box placed close to the roller of a drafting apparatus. CONSTITUTION:The silver S is drafted by the drafting apparatuses 4-7 to form a broad ribbon-like fiber bundle, which is twisted by air-twisting nozzle 2 to obtain a spun yarn. The above fasciated spinning frame is furnished with a suction box 8 covering the middle bottom roller 5a and the front bottom roller 7a of the drafting apparatuses 4-7, and suction ports 8b and 8a are placed close to the middle bottom roller 5a and the front bottom roller 7a. The width W of the suction port 8b corresponding to the middle bottom roller 5a is made narrower than the effective length of the moddle bottom roller 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a clearer device in a binding spinning device.

(Prior art) In bundle spinning, the sliver supplied to a drafting device is drafted into four wide ribbon-shaped SR bundles and continuously supplied to a heating nozzle, where the sliver is heated and untwisted by the air swirl inside the heating nozzle. It is then spun into yarn. The binding spinning device produces yarn at a spinning speed more than 10 times that of conventional ring spinning machines, etc., and the trough 1-
Since the rotational speed of each roller of the device is also high, the influence of the accompanying air current of the blond roller is large, and it is easy to generate fluff or wind the fibers around the roller.

In order to solve the above problem, as shown in FIG. 6, the front bottom roller 33, middle bottom roller 34, and
A suction box 37 is disposed to cover the apron 35 and the back bottom roller 36, and the front bottom roller 33
and a suction port 37a having a width wider than the effective length of each roller 33, 34, that is, the length of the shaped portion that can be useful for drafting the fiber bundle, at a position close to the mid-grain 1-marrow roller 34.

There is a clearer device equipped with 37b. However, if the suction port has the above-mentioned effective length and width, the air velocity is high at both ends as shown in FIG. 3, so air flows from the center to both ends, causing disturbance of the fibers.

As shown in Fig. 7, the accompanying airflow A generated by the high-speed rotation of the front roller changes its direction in the axial direction of the front roller at the nip point and moves forward, so that the air flow A is generated at both ends of the mm bundle sent to the front roller. The I! passed the front roller in a disordered state and protruded from the front roller. There is an inconvenience that the dirt joins the fiber bundle again when the m-thread bundle is supplied to the heating nozzle 31 and causes slab generation.

(Problem to be solved by the invention) This invention can be placed at the position in the width direction of the suction port)! This solves the problem of the conventional device in that slabs often occur due to the influence of the I speed difference and the accompanying airflow of the front roller.

Structure of the Invention (Means for Solving Problems) In the present invention, a suction box is provided to cover at least the circumferential surfaces of a front bottom roller and a middle bottom roller of a drafting device that drafts a sliver into a ribbon-like fiber bundle. In this case, suction ports were provided at positions close to the front bottom roller and the middle bottom roller, respectively.

The width of one of the suction ports on the side corresponding to the middle bottom roller is formed to be narrower than the effective length of the middle bottom roller.

(Function) The sliver supplied to the drafting device is drafted into a wide ribbon-like fiber bundle between the rollers of the drafting device and supplied to the heating nozzle. The fluff generated when the sliver is drafted between the rollers is removed by suction from a suction port formed in the suction box. Among the rollers, the front roller, which rotates at the highest speed, generates the strongest accompanying airflow, and near the nip point of the front roller, that is, at the tip of the apron, the traveling direction of the accompanying airflow adjusts to the axial direction of the front roller, and both sides change towards. However, due to the suction airflow from the suction port formed at the position corresponding to the middle bottom roller of the suction box, the accompanying airflow is prevented from disturbing both ends of the sliver, and the sliver is always kept in a stable state by the front roller. The yarn is supplied to the heating nozzle through the heating nozzle, and the occurrence of slabs in the spun yarn due to the action of the heating nozzle is extremely reduced.

(Actual/Flow Side) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 5. As shown in FIG. 1, a drafting device 3 is disposed above the trumpet 1, which drafts the sliver S that is lightly supplied from the trumpet 1 and supplies it to the heating nozzle 2 as a ribbon-shaped 191 bundle. draft ii
i! 3 is composed of back rollers 4a, 4b, middle rollers 5a, '5b, aprons 5a, 5b, and front rollers 7a, 7b, and the bottom roller side of the draft device 3 includes a front bottom roller 7a and a T-bron 6a.
A suction box 8 is disposed to cover the circumferential surface of the middle bottom roller 5a. The suction box 8 is connected to a suction source (not shown) by a suction vibrator 9. At the same time, suction ports 8a and 8b are formed at a position facing the front bottom roller 7a and a position facing the middle bottom roller 5a, respectively. As shown in FIG. 2, the widths W of both suctions D8a and 8b are narrower than the effective lengths of the front bottom roller 7a and middle bottom roller 5a, respectively. The term "effective length" herein refers to the length of the tendril-shaped portion that helps in drafting the fiber bundle. Specifically, it corresponds to the length of the portion where the stripe or O-let is carved.

Next, the operation of the apparatus configured as described above will be explained. The sliver S supplied from the trumpet 1 to the drafting device 3 is drafted into a ribbon-like fiber bundle by the drafting device 3 and supplied to the heating nozzle 2, where it is spun as yarn Y by the action of the heating nozzle 2. The sliver S is rolled into a wide ribbon between each roller of the trutting device! Fly fluff is generated when it is drafted into the I miscellaneous bundle, but the generated fluff is suctioned and removed by the suction airflow of the suction ports 8a and 8b of the suction box 8. One suction port 8a is connected to the front rollers 7a and 7b.
The fluff generated between the heating nozzle 2 and the heating nozzle 2 is suctioned and removed, and the other suction port 8b is drafted between day and day. Collect the fluff generated during the process.

The suction airflow of one suction port 8a has almost no effect on the state of the fiber bundle even if the width and placement position of the suction port is changed, but the suction airflow of the other suction port 8b can be changed by changing the width of the apron 6a, 6b. The influence on the m string bundle at the tip changes. FIG. 3 shows the results of measuring the wind velocity distribution at the measurement points at the tip of the apron shown in FIGS. 4(a) and 4(b) by changing the width W of the suction port. As shown in FIG. 3, when the width W of the suction port 8b is as large as 40 mm, the wind speed at the A device corresponding to the circumferential surface of the front bottom roller (i.e., measurement points B, C, and D) and the side of the front bottom roller (measurement points If the difference in wind speed at locations A and E) is extremely large, and the wind speed on the sides of the front roller is higher than the wind speed on the circumferential surface of the front roller, the fiber bundle will be disturbed between the apron tip and the front roller in the conventional device and a slab will occur. This is thought to be the reason for the frequent occurrence. On the other hand, when the width W of the suction port 8b is as narrow as 2Qmm, the wind speed at the position corresponding to the circumferential surface of the front roller is larger than the value when the width W is wide.
On the other hand, the wind speed on the sides of the front roller decreases,
The difference between the wind speed on the circumferential surface of the front O-ra and the wind speed on the sides of the front O-ra is small. That is,
By narrowing the width W of the suction port 8b, the effect of disturbing the fiber bundle at the tip of the apron is reduced, and the occurrence of slabs is reduced. In either case, the wind speed at the position corresponding to the front roller peripheral surface is smaller than the wind speed at the side because the apron 6a protrudes from the tension bar 10. Also, the length of each roller 5a, 7a is approximately 3
It is 5n+m.

In addition to the disturbance at both ends of the fiber bundle, the cause of slab generation is that the fluff or 11 fibers that are moving along the 1st blower 6a toward the suction port 8b due to the suction action of the suction port 8b are caused by the front bottom. It is also conceivable that the fibers come into contact with the grooves formed in the roller and are drawn into the fiber bundle again, causing slabs.

To solve this problem, the width of the suction port 8b can be narrowed to reduce the wind speed on the circumferential surface of the front roller, that is, the suction [
] 8b is strengthened, and the fibers released from the fiber bundle are quickly sucked into the suction port 8b and are no longer brought into the 1 Jit 11 bundle by the action of the front roller, thereby preventing the generation of slabs. Low, it's going to go down.

Furthermore, if the ends of the 5-surt bundle supplied to the heating nozzle 2 are in a disordered state, it may cause yarn breakage, etc., but by preventing this disorder of the fiber bundle, the incidence of yarn breakage can be reduced. Helpful. FIG. 5 shows the results of measuring the relationship between the width W of the suction port 8b and the number of broken threads per spindle. The number of broken threads decreased as the width W of the suction port became narrower, and the number of broken threads was halved when the width W was 20 mm compared to when the width W was 5 Q mm. The effect of reducing the incidence of slubbing and yarn breakage by narrowing the width W of the suction port 8b is that the larger the spinning count, that is, the thinner the spun yarn, the fewer m fibers in the LLI bundle. The effect became greater.

Note that the present invention is not limited to the above-mentioned embodiments. For example, the width of the suction port 8a corresponding to the front bottom roller 7a may be increased, or the length of the suction port 8b corresponding to the middle bottom roller 5a may be increased. It is also possible to arbitrarily change the shape, structure, etc. of each part without departing from the spirit of the present invention, such as by moving the opening position closer to the bottom roller 7a side.

Effects of the Invention As detailed above, according to the present invention, the +i cotton generated in the draft section is smoothly suctioned and removed from the suction ports formed at positions corresponding to the front bottom roller and the middle bottom roller. Unlike the conventional device, the 1311 bundle at the tip of the apron is prevented from being disturbed by the suction airflow of the suction port formed at the position corresponding to the middle bottom roller, and the 8M bundle is stably transferred from the front roller to the heating nozzle. Since the yarn is supplied, it has the excellent effect of reducing the occurrence of slabs and the rate of yarn breakage.

[Brief explanation of the drawing]

1 to 5 show an embodiment embodying the present invention, in which FIG. 1 is a partially cutaway side view, FIG. 2 is a schematic diagram showing the relationship between the roller and the suction port of the clearer, and FIG. Figure 3 is a diagram showing the wind speed distribution at the tip of the first prong, and Figure 4 (a) is a diagram showing the wind speed distribution at the tip of the 1st prong.
Front view showing the measurement points of the wind speed distribution in Figure 4 (b)
5 is a miniature diagram showing the relationship between the width of the suction port and yarn breakage, FIG. 6 is a side view of the conventional device, and FIG. 7 is a schematic diagram showing the accompanying airflow of the front roller section. Heating nozzle 2, draft device 3, middle bottom roller 5
a1 Apron 5a, 5b, Freon] ~ Bottom roller 7a, Suction box 8, Suction ports 8a, 8b, Suction port width W0 Patent applicant: 745 Den Automatic Loom Works Co., Ltd. Agent
Person Patent Attorney On 1) Hironobu Figure 1 L...lh,, 4a Figure 3 BCDE Flight 1 constant vJ feed Figure 4 (a) - ( Figure 5 W (mm) "7a ≧

Claims (1)

[Claims] 1. A suction box is arranged to cover at least the circumferential surfaces of the front bottom roller and middle bottom roller of a drafting device that drafts the sliver into a ribbon-like fiber bundle, and the box is located close to the front bottom roller and middle bottom roller. A clearer device in a binding spinning device in which a suction port is provided at each side, and the width of the suction port on the side corresponding to the middle bottom roller is narrower than the effective length of the middle bottom roller.