JPS5811810Y2 - Yarn suction device - Google Patents

Description

[Detailed description of the invention] The present invention is a yarn suction device, specifically, a yarn suction device that jets compressed fluid backward from a jetting passage and uses the negative pressure generated thereby to suction the yarn. This article relates to a suction device.

Conventionally, as a yarn suction device, as shown in Fig. 1,
A vortex chamber 3 that bulges in the radial direction of the suction road 2 is provided following the yarn suction port 1 on a suction road 2 that communicates with the yarn suction port 1, and a plurality of jet holes 4 that open to the vortex chamber 3 are bored. The jet holes 4 are arranged obliquely so that the jet flow does not pass through the center of the suction road 2, and is directed toward the discharge direction of the yarn Y. A discharge hole 5 whose opening gradually increases toward the end is provided, and the yarn Y is sent out toward the end of the suction road 2 while being swirled in a spiral shape by the jet flow from the jet hole 4 in the swirl chamber 3. there were.

However, in order to blow a jet flow onto the yarn Y in the swirl chamber 3, entangle the yarn with the air flow, and suction the yarn Y with a strong force, the center axis of the suction road 2 of the jet hole 4 must be It is preferable that the inclination angle α is close to 90 degrees;
In order to suck in and send out at high speed, there is a trade-off that it is preferable that the inclination angle α of the jet hole 4 be close to 0 degrees.

Therefore, there has always been a limit to increasing the suction speed of the yarn Y while maintaining the practically necessary gripping force by varying the inclination angle α of the jet hole 4;
000m/m) or ultra-high speed (7000m/m)
There was a drawback in that it was not possible to suction yarns traveling at a speed of more than m/rrrm).

The present invention was developed in view of the above drawbacks.

a suction body, an inlet passage formed within the suction body, one end of which opens at one end surface of the suction body and extends inward; and an inlet passage formed within the suction body, one end of which is continuous with the other end of the inlet passage; is formed at the other end of the outlet passageway, which opens at the other end of the suction body and whose cross-sectional area gradually increases from one end to the other end, and at the other end of the inlet passageway, and whose cross-sectional area increases toward the other end. A vortex chamber is formed in the outlet passageway and has an enlarged part that continuously expands and a reduced part whose cross-sectional area continuously decreases in the same direction. An annular recess having an enlarged enlarged part p and a reduced part whose cross-sectional area continuously decreases in the same direction, and an annular recess formed in the suction body so that its inner end opens into the enlarged part of the vortex chamber, and the compressed fluid is vortexed. a plurality of first ejection passages that eject the compressed fluid toward the inner wall surface of the reduced portion of the vortex chamber so as to swirl it within the chamber and flow out toward the outlet passage;
a second ejection passage formed within the suction body so that its inner end opens into the enlarged portion of the annular recess, and for ejecting compressed fluid from the annular recess toward the inner wall surface of the outlet passage on the other end side; The yarn sucked from one end of the passage is processed into a bulky shape in the vortex chamber by the compressed fluid ejected from the first ejection passage, and then sent to the outlet passage, and then the compressed fluid is ejected from the second ejection passage. This is a yarn suction device characterized in that the yarn is fed out at high speed in the direction of the other end of the outlet passage.

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

In Fig. 2.3.4, 11 is a suction body, and an inlet passage 12 is formed in this suction body 11, one end of which opens at one end surface of the suction body 11 and extends inward. .

Reference numeral 13 denotes an outlet passage formed in the suction body 11, one end of which is continuous with the other end of the inlet passage 12, and the other end opens to the other end surface of the suction body 11.

The outlet passage 13 is formed in a shape that widens toward the end so that its cross-sectional area gradually increases from one end to the other end.

The input passage 12 and the output passage 13 constitute a yarn passage 14 as a whole.

An annular swirl chamber 15 bulging in the radial direction is formed at the other end of the inlet passage 12 .

That is, the vortex chamber 15 has an enlarged section whose cross-sectional area continuously increases toward the other end, and a reduced section which is continuous with the enlarged section and whose cross-sectional area continuously decreases toward the other end. It is composed of and.

Reference numeral 16 denotes an annular groove formed in the suction body 11 so as to surround the vortex chamber 15 in the radial direction, and a passage 17 formed in the suction body 11 in the radial direction is formed on the outer peripheral wall of the annular groove 16. The inner end is open.

One end of a pipe 18 is connected to the outer end of the passage 17 in the radial direction, and the other end of the pipe 18 is connected to a compressed fluid source 19 to supply compressed fluid from the compressed fluid source 19 to the pipe 18 and the passage 1.
7 to the annular groove 16.

A plurality of (four in this embodiment) first ejection passages 20 are formed in the suction body 11 so that their outer ends open to the inner wall surface of one end of the annular groove 16 , and their inner ends open to the enlarged portion of the swirl chamber 15 . It is formed in a widening shape so that its cross-sectional area gradually increases from the outer end to the inner end.

Moreover, each first ejection passage 20 has an extension line L1 of its central axis.
is the tangent L of the swirl chamber 15 passing through the inner end of the first ejection passage 20
2 and the normal line L3 of the swirl chamber 15 through which the inner end of the first ejection passage 20 passes.

The first ejection passage 20 is an extension line L1 of the central material line.
and the central axis L4 of the yarn path 14 (strictly speaking, a straight line parallel to the central axis aL4 that intersects the extension line L1), the intersection angle α is an acute angle, preferably in the range of 40 degrees to 80 degrees. There is.

Therefore, the compressed fluid jetted from the annular groove 16 toward the inner wall surface of the reduced portion of the swirl chamber 15 via the first jet passage 20 swirls within the swirl chamber 15 and flows out toward the outlet passage 13. Thus, the entire body moves spirally toward the outlet passage 13.

An annular recess 21 that bulges out in the radial direction is formed in the axially intermediate portion of the outlet passage 13 in order to facilitate the manufacture of a second ejection passage, which will be described later.

That is, the annular recess 21 has an enlarged part whose cross-sectional area continuously increases toward the other end, and is continuous with this enlarged part.
and a reduced portion whose cross-sectional area is continuously reduced toward the other end.

The suction body 11 is arranged so that its outer end opens to the other end wall surface of the annular groove 16.
A plurality of (four in this embodiment) second ejection passages 22 formed inside have their inner ends open to the enlarged part of the annular recess 21,
It is formed in a widening shape so that its cross-sectional area gradually increases from the outer end to the inner end.

Moreover, each second ejection passage 22 has an extension line L5 of its central axis.
is located between the tangent line L6 of the annular recess 21 passing through the inner end of the second ejection passage 22 and the normal line L7 of the annular recess 21 passing the inner end of the second ejection passage 22, and is preferably It is positioned closer to line L7.

In addition, the second jet passage 22 has an acute intersection angle β between the extension line L5 of its central axis and the central axis L4 of the yarn passage 14 (strictly speaking, a straight line parallel to the center line L4 that intersects the extension line L5). , and is equal to or smaller than the intersection angle α, preferably in the range of 5 degrees to 50 degrees.

Therefore, the compressed fluid that is ejected from the annular groove 16 through the second ejection passage 22 toward the inner wall surface of the outlet passage 13 on the other end side than the annular recess 21 swirls within the outlet passage 13 and It will flow out towards the other end.

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

First, compressed fluid is supplied from the compressed fluid source 19 into the annular groove 16 via the pipe 181 and passage 17 .

The compressed fluid supplied into the annular groove 16 flows through the first ejection passage 2
0 and the second jet passage 22 into the swirl chamber 15 and the outlet passage 13, respectively.

At this time, since the cross-sectional area of the first ejection passage 20 and the second ejection passage 22 gradually expands from the outside toward the inner end, the pressure energy of the compressed fluid itself is converted into velocity energy. The compressed fluid gains velocity energy and is accelerated, while its pressure decreases and becomes a high-speed jet.

The jet of compressed fluid ejected into the vortex chamber 15 is arranged such that the extension line L1 of the central axis of the first ejection passage 20 is located between the tangent line L2 and the normal line L3. As a result, the velocity component of the jet flow in the horizontal plane in FIG. 2 increases within the swirl chamber 15, and the jet swirls as a strong vortex along the inner wall surface.

In the past, since the intersection angle α between the extension line L1 of the center relief passage of the first ejection passage 20 and the central axis L4 of the yarn passage 14 is an acute angle, the jet flow It flows toward the outlet passage 13 due to the velocity component.

Therefore, the jet flow spirally moves toward the outlet passage 13 while swirling within the swirl chamber 15 .

On the other hand, the jet of compressed fluid ejected from the annular recess 21 toward the inner wall surface of the outlet passage 13 on the other end side via the second ejection passage 22 has an extension line L5 of the central axis of the second ejection passage 22 as a tangent. Since it is preferably located between L6 and the normal line L7, closer to the normal line L7, it turns at the center of the outlet passage 13.

In addition, since the intersection angle β between the extension line L5 of the central material texture of the second jet passage 22 and the central axis L4 of the thread passage 14 is an acute angle, the jet flow is generated in the vertical plane in FIG. The velocity component of the fluid increases significantly compared to that in the horizontal plane, and the fluid flows toward the other end of the outlet passage 13 at high speed.

At this time, since the crossing angle β is equal to or smaller than the crossing angle α, the speed toward the other end of the outlet passage 13 is higher than that of the jet flow jetted out from the jet passage 22, and the wall surface of the outlet passage 13 is There is no blowing.

As a result, the jet flow spirally moves toward the other end of the outlet passage 13 while swirling around the center of the outlet passage 13 .

Then, the jet of compressed fluid jetted out from the first jetting passage 20 and the jet of compressed fluid jetted out from the second jetting passage 22 merge in the yarn passage 14 and flow toward the other end of the outlet passage 13. flows.

At this time, since the cross-sectional area of the outlet passage 13 gradually increases from one end to the other, the pressure energy of the jet of compressed fluid itself is converted into velocity energy. , it obtains velocity energy and is accelerated, and at the same time its pressure decreases, becoming a low-pressure, high-speed jet.

As a result, the inside of the yarn passage 14 becomes negative pressure, and the entrance passage 1
Inhale outside air from one end of 2.

Now, when the yarn end of the yarn Y is near one end of the entrance passage 12, the yarn end of the yarn Y is sucked into the entrance passage 12 by the sucked air flow.

Next, the jet flow ejected from the first ejection passage 20 blows down on this yarn Y, and the fibers are opened in the swirl chamber 15 and become bulky, so that a bulky process is performed.

At this time, the yarn Y is swirled within the swirl chamber 15 by the jet flow and sent out toward the outlet passage 13.

As a result, the yarn Y is strongly gripped by the jet flow ejected from the first ejection passage 20 and is sent out to the outlet passage 13 at a relatively low speed.

Next, the yarn Y is gripped by the high-speed jet jet ejected from the second ejection passage 22 and sent out at high speed toward the other end of the outlet passage 13.

As explained above, according to the present invention, the yarn can be strongly gripped by the compressed fluid ejected from the first ejection passage and can be suctioned and sent out at high speed by the compressed fluid ejected from the second ejection passage. Also, threads traveling at ultra-high speed can be easily sucked.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the prior art, FIG. 2 is a cross-sectional view showing an embodiment of the yarn suction device according to the present invention, and FIG.
The figure is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is a sectional view taken along the line BB in FIG. 11 is a suction body, 12 is an inlet passage, 13 is an outlet passage, 15
2 is a swirl chamber, 20 is a first ejection passage, and 22 is a second ejection passage.

Claims (1)

[Scope of utility model registration request] a suction body, an inlet passage formed inside and outside the suction body, one end of which opens at one end surface of the suction body and extends inward; and an inlet passage formed inside the suction body, one end of which is continuous with the other end of the inlet passage; is formed at the other end of the outlet passageway, which opens at the other end of the suction body and whose cross-sectional area gradually increases from one end to the other end, and at the other end of the inlet passageway, and whose cross-sectional area increases toward the other end. A vortex chamber is formed in the outlet passageway and has an enlarged part that continuously expands and a reduced part whose cross-sectional area continuously decreases in the same direction. An annular recess having an enlarged part that expands and a reduced part whose cross-sectional area continuously decreases in the same direction is formed in the suction body so that the inner end opens into the enlarged part of the vortex chamber, and the compressed fluid is drawn into the vortex chamber. a plurality of first jetting passages which jet the compressed fluid toward the inner wall surface of the reduced part of the vortex chamber so as to swirl the compressed fluid and flow out toward the outlet passage; a second jetting passage formed in the annular recess and jetting compressed fluid toward the inner wall surface of the exiting passage at the other end; The spouted compressed fluid processes the material into a bulky shape in the vortex chamber, swirls it, and sends it to the exit passage, and then the compressed fluid jetted from the second jetting passage sends it out at high speed toward the other end of the exit passage. A yarn suction device characterized by: