JPH0240767B2 - BOSEKIKINIOKERUSENITABANODORAFUTOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a draft device for a fiber bundle (hereinafter referred to as sliver) in a spinning machine, such as a ring spinning machine, and more particularly to a sliver convergence in a draft zone.

2. Description of the Related Art As a draft device for a supplied sliver, a method is adopted in which a plurality of upper and lower pairs of draft rollers are arranged in parallel and the surface speed of the rollers is sequentially increased. In this case, the width of the sliver gradually becomes wider each time the draft is repeated, and not only does it cause yarn unevenness or fuzz, but also causes the so-called butterfly (Fig. 3B), which will be described later, and the twisting by the spindle twisting means runs up. It is well known that this can cause problems and cause thread breakage.

Conventionally, the solution to this problem has been to use collectors to converge the sliver, and to reduce butterflies by adjusting the so-called fleece angle. Other methods have also been proposed in which the sliver is given false twist by airflow in the draft area. (For example, Japanese Patent Application Laid-open No. 58-31123).

Problems to be Solved by the Invention In the method using the collector described above, fluff may be generated due to frictional resistance. Furthermore, the twisting method using air currents has problems such as requiring a lot of effort to thread the thread, and the twisting is not constant and is uncertain. In particular, recently there has been a demand for higher spindle speeds, and these problems become even more serious when the spinning speed is increased accordingly.

As a means to solve the above-mentioned problems, the present inventor has previously proposed a means for providing a ventilation film that moves perpendicularly to the sliver in the draft area, pressing the sliver against the ventilation film by suction, and twisting the sliver by the movement of the ventilation film. (Patent Application No. 132564, 1982). When this method is used, the sliver is twisted by contact with the sliver, so the twisting is reliable and does not cause fuzz or disorder.Since a part of the twist is drawn out from the draft roller on the downstream side, the width of the butterfly is narrower. Twisting by the twisting means can be measured up to near the nip point.

The present invention relates to an improvement of the above-mentioned invention, and uses a suction rotary cylinder as a ventilation membrane, and makes it easy to move this rotary cylinder to a predetermined position in a draft area and return to a separated position, thereby making it convenient for cleaning etc. purpose.

Means for Solving the Problems The present invention to achieve the above object forms a draft area in a fiber bundle drafting device in a spinning machine that drafts a supplied sliver using a plurality of pairs of upper and lower rollers. Behind the delivery roller (on the upstream side of the sliver flow), there is an absorption rotary cylinder that is perpendicular to the traveling sliver and connected to a suction device. In addition to being twisted by motion, the rotary tube is supported by a pendulum arm so that it can be moved up and down.

Function Since the suction rotary tube is attached to the pendulum arm, it is easy to insert, position and separate the tube into the draft area in synchronization with the top roller by operating the pendulum arm.

Embodiment FIGS. 1 to 6 relate to a first embodiment, in which a draft device 1 moves a back bottom roller 2, a middle bottom roller 3, a front bottom roller 4, and a delivery bottom roller 5 at predetermined intervals from the sliver S supply side. The top rollers 6, 7, 8, and 9 are arranged opposite to each bottom roller, and the middle bottom roller 3 and the corresponding middle top roller 7 are each provided with an apron 10, 11, and each of the top rollers 6, 7, 8, and 9 are attached to a pendulum arm 12 of known structure.

Hereinafter, the back bottom roller 2 and the back bottom roller 6 corresponding thereto will be collectively referred to as back crawlers.
BR, similarly called middle roller MR, front roller FR, and delivery roller DR. Note that 13 is a trumpet for receiving a slide, and 14 is a collector.

Reference numeral 20 denotes a suction twisting means, which is arranged behind the delivery roller DR, that is, on the supply side of the sliver S. This suction twisting means 20 is located above the sliver S, and includes a suction rotary cylinder 21 that contacts the sliver S and rotates perpendicularly to the running direction of the sliver S, and a drive roller 22 that rotates this rotary cylinder 21. Be prepared. The suction rotary cylinder 21 has a ventilation membrane 23 made of a wire mesh or a perforated plate stretched around its outer periphery, has side plates 24 and 25 attached to both sides, and is rotatably supported by a support shaft 26 via a bearing 27.

A suction nozzle 28 is housed in the suction rotary cylinder 21, and the suction nozzle 28 has a slit 30 at its tip.
The slit 30 faces the sliver S with the ventilation membrane 23 in between, and is provided parallel to the sliver S. The suction rotary cylinder 21 is attached to the support bracket 31 as a set of two spindles.
1 is supported by the pendulum arm 12, the support shaft 26 is fixed to the support bracket 31, the suction nozzle 28 is attached to the support shaft 26, and the suction nozzle inner hole 29 is connected to the support shaft 26. It communicates with the inner hole 32 of the support bracket 31 through the inner hole.

The support bracket 31 has the above-mentioned inner hole 32 at the rear of the upper end.
An intake pipe 33 leading to the intake pipe 33 is attached, and the intake pipe 33 is connected to an appropriate intake means (not shown). Further, a pin 34 is protruded from the front of the support bracket 31 at a position that maintains the balance with the suction rotary cylinders 21, 21 attached on both sides.
One end is pivotally supported by 2, and the grip piece 36 of a grip arm 35 pressurized by a spring 37 is inserted and supported. 3
8 is a holding spring. The drive roller 22
is adapted to abut on both suction rotary tubes 21, 21 and rotate simultaneously, contact surfaces 24a, 25a are formed on the outer periphery of side plates 24, 25 of each rotary tube 21, 21, and drive rollers 22 are respectively contact surface 24
A, 25a, a pair of pulleys 40, 41 are fixed to a drive shaft 42. The drive shaft 42 is rotatably supported by a bracket 43, and can be directly connected to a gear mechanism 44 and a gear mechanism 44 as necessary. intermediate shaft 45
A bevel gear mechanism 47 is attached to the main shaft 46 via
connected to. In the figure, 50 is a well-known spindle twisting mechanism mainly consisting of a spindle 51, and the fleece F, which is drafted to a predetermined thickness and fed out from the delivery roller DR, is attached to the upper part of the spindle 51 through a snail wire 52, such as a chrysanthemum shape etc. Ballooning is controlled by engaging the spindle head portion 53 of the wire, and after being wound several times around the guide shaft 54, it is wound onto the bobbin 57 via a traveler 56 running on a ring 55. Note that the twisting direction of the sliver S by the suction rotary cylinder 21 is determined by the spindle twisting mechanism 5.
This is the same as the twisting direction according to 0.

This embodiment has the above configuration, and the sliver S to be supplied is
It is drafted by the draft rollers of the MR, front roller FR, and delivery roller DR, and is also sucked by the suction nozzle 28 to the main shaft 4.
6, it comes into contact with the rotating suction cylinder 21 and is suction-twisted. Although the twisting is a false twist between the front roller FR and the delivery roller DR, a part of the twist is unwound as the delivery roller DR rotates. Therefore, as shown in FIG. 3, normally the sliver S at the delivery part of the delivery roller DR forms a triangular shape, that is, a butterfly B, but the width of the butterfly becomes narrow due to the above-mentioned delivery of the combustion, and therefore Twisting can be applied close to the nip point, and yarn breakage in butterfly B can be prevented.

Next, when removing the suction rotary cylinder 21, by rotating the pendulum arm 12 upward,
Suction rotary cylinder 21 together with each top roller 6, 7,...
can be pulled upwards and removed from the gripping arm 35.

In addition, when restoring to the set position, by applying downward pressure to the pendulum arm 12, the suction rotary cylinder 21 is pressed against the drive roller 22, and is held in a fixed position.

Next, FIGS. 7 to 9 show a second embodiment. This embodiment shows an example in which a suction rotary cylinder for twisting the sliver S being drafted is arranged below the sliver S, and the draft device 60 is a four-wire roller system including a delivery roller DR as in the first embodiment. At this time, a suction twisting means 61 is provided behind the delivery roller DR. This suction twisting means 61 is connected to the suction rotating tube 62 located below the sliver S as described above.
and a drive roller 63 that drives this.
The suction rotary cylinder 62 has the same structure as the suction rotary cylinder 21 of the previous example, and the same parts are given the same reference numerals and the explanation thereof will be omitted.

As in the previous example, this suction rotary cylinder 62 is made up of two pieces attached to the support shafts 6 on both sides of the support bracket 65.
7, 67, the central part of the support bracket 65 extends upward, has a protruding pin 68 as in the previous example, and has a grip piece 72 of a grip arm 71 provided on the pendulum arm 70. Insert and support. 73 is a holding spring, and 74 is an intake pipe connected to the inner hole 66 of the support bracket 65, which is connected to an appropriate suction means (not shown).

The drive roller 63 is a pair of left and right suction rotary cylinders 6.
2,62 and rotates it,
Each side plate 24 of each suction rotary cylinder 62, 62,
The pulley 7 that comes into contact with the contact surfaces 24a and 25a of 25
The drive shaft 77 is rotatably supported by a mounting bracket 78 and connected to a main shaft 80 via a bevel gear mechanism 79.

In this embodiment as well, the suction rotary cylinder 62 can be easily removed by rotating the pendulum arm 70 upward, and by pushing it downward, the suction rotary cylinder 62 comes into contact with the drive roller 63 and is fixed at a predetermined position. be done.

In each of the above-mentioned embodiments, a main shaft is provided as a driving means for the suction rotary cylinder, and the main shaft is used to drive the suction rotating cylinder, but the suction rotating cylinder may be driven by a belt or the like. Furthermore, although the outer periphery of the suction rotary tube is cylindrical in the example shown, it may be shaped like a drum with a bulge in the center. Furthermore, although an example has been shown in which the drive roller rotates by contacting both side plates of the suction rotary cylinder, the drive roller may also be made of an elastic material and rotate by contacting the ventilation membrane. Of course, the design can be changed as desired without changing the gist of the invention.

Effects of the Invention According to the present invention, the suction rotating cylinder for twisting the sliver being drafted is attached to the pendulum arm, and is oriented at a predetermined position by pressing down on the pendulum arm and coming into contact with the drive roller. It has the advantage of being easy to attach and detach, making it convenient to handle.

[Brief explanation of drawings]

Figures 1 to 6 relate to the first embodiment, where Figure 1 is an overall explanatory diagram, Figure 2 is a view taken along the - line in Figure 1, Figure 3 is an explanatory diagram of the butterfly, and Figure 4 is an illustration of the butterfly. is a sectional view taken along the - line in Fig. 2, Fig. 5 is a sectional view taken along the - line in Fig. 2, Fig. 6 is a sectional view taken along the - line in Fig. 5, and Figs. Regarding the second embodiment, FIG. 7 is an overall explanatory diagram, FIG. 8 is a sectional view taken along the line - in FIG. 7, and FIG. 9 is a sectional view taken along the line - in FIG. 8. 1, 60 are draft devices, 12, 70 are pendulum arms, 20, 61 are suction twisting means, 2
1 and 62 are suction rotary cylinders, 22 and 63 are drive rollers, DR is a delivery roller, and S is a sliver.

Claims (1)

[Scope of Claims] 1. In a fiber bundle drafting device in a spinning machine that drafts a supply sliver with a plurality of pairs of upper and lower rollers, the fiber bundle is perpendicular to the sliver running behind a delivery roller forming a draft area, and A suction rotary cylinder connected to an air intake device is provided, and the rotary cylinder is pressed against a drive roller, attracts the sliver by suction air, twists it by rolling, and
A draft device for a fiber bundle in a spinning machine, characterized in that the rotary cylinder is supported by a pendulum arm and can be raised and lowered. 2. The fiber bundle draft device in a spinning machine according to claim 1, wherein the suction rotary cylinder is arranged above the traveling sliver. 3. A fiber bundle draft device in a spinning machine according to claim 1, wherein the suction rotary cylinder is disposed below the traveling sliver. 4. The suction rotary cylinder is a set of two spindles, and is removably supported by the pendulum arm via a common support bracket, and rotates by contacting a common drive roller. A fiber bundle draft device in a spinning machine according to item 1.