JPH0733204B2 - Yarn storage device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a yarn storage device for temporarily storing a yarn supplied continuously or intermittently.

(Prior art and its problems) In recent years, the spinning speed has been increased in order to improve the productivity of the spinning machine, and the amount of yarns stored during the yarn joining operation increases. Therefore, a yarn storage device as described in JP-A-53-134943 has been proposed. In the yarn accumulating device, since the pipe is bent in multiple layers, the air resistance at the 180 ° bent portion becomes large and a high suction static pressure is required. In addition, there is a problem in that the yarn tension changes stepwise because pressure changes occur at the bent portion, or it is difficult to remove the yarn block.

Further, if the yarn passages are formed so as to be located vertically above and below, if the yarn length in the pipe becomes long, it will hang down due to its own weight, resulting in a entangled yarn mass in the lower yarn, or a yarn breakage. There was a problem that it occurred. Further, in order to solve the above-mentioned problems, if a tube without a bent portion is used, it becomes considerably long, and there is a problem that it cannot be installed in a narrow space in the machine base.

(Purpose) The present invention solves the above-mentioned problems, and can stably suck long yarns without getting entangled even with a low static pressure and a small air flow. An object of the present invention is to provide a yarn accumulating device that can be easily installed in a yarn storage device.

(Means for Solving the Problems) That is, the yarn accumulating device of the present invention connects one end of a pipe having a passage having a flat cross section to a suction source and sucks the yarn from the other end of the opened pipe. In the storage device configured to store the yarn in the pipe, the pipe is configured such that a pair of yarn passages are connected by a slit, and the yarn passages on the yarn suction side are located at upper and lower positions in the vertical direction, on the suction source side. The yarn passages are twisted at a substantially right angle so that they are located at both sides in the horizontal direction.

Further, the tube is twisted in the same direction as the direction in which the yarns are twisted with each other when the yarns in which the twisting direction of the pipe is sucked are loosened, and the supply-side yarn passage is the pull-out side yarn passage. It is preferable to have a spirally twisted shape with respect to the axis.

(Example) The structure of one example of the yarn storage device of the present invention will be described with reference to the drawings.

Reference numeral 1 is a main body of a yarn storage device, one end of a passage 2 is connected to a blower (not shown) through a hose 3, and the other end is formed with a yarn suction port 4 open to the atmosphere. Passage 2
The cross-sectional shape has two substantially circular supply side yarn passages 5A and drawing side yarn passages 5B.The widths of these two yarn passages 5A and 5B are narrower than those of the yarn passages, and the yarns are The shape is such that it is connected by a slit 5C that allows sufficient passage. On the suction port 4 side, the supply-side yarn passage 5A and the pull-out-side yarn passage
5B is located vertically above and below, and on the blower side, the supply side yarn passage 5A is spirally formed with the drawing side position passage 5B as an axis so that these two yarn passages 5A and 5B are located on both sides in the horizontal direction. The main body 1 is twisted about 90 ° in the middle so that Then, the main body 1 in which the two yarn passages 5A and 5B are located on both sides in the horizontal direction has 90 degrees in the flat direction with an appropriate curvature on the suction source side.
° Folded.

Reference numeral 6 denotes a roller for sending out a yarn spun from a spinning device (not shown) at a predetermined speed, and 7 denotes a yarn from the roller 6 and a yarn from the winding device 8 when a yarn break occurs. It is a knotter that splices yarn.

The yarn sent from the above-mentioned roller 6 is sucked from the suction port 4 of the yarn accumulating device, becomes a U-shape, and the supply-side yarn passage
5A and the slit 5C are stored in the passage 2 of the drawing-side yarn passage 5B. That is, the yarn sent from the roller 6 travels in the supply-side yarn passage 5A located above the suction port 4, and when the main body 1 is twisted by about 90 ° and the passage 2 becomes horizontal, the yarn becomes horizontal. When the main body 1 travels through a certain supply-side yarn passage 5A and is in a vertical state in which the main body 1 is bent by approximately 90 ° in the flat direction, the main body 1 travels along the suction-side airflow through the supply-side yarn passage 5A in the vertical state. Then, in the U-shaped portion, it travels in the slit 5C, and again from the bent portion of the passage 2 in the flat direction to the horizontal position,
After the twist of about 90 °, the cross section of the passage 2 becomes vertical,
The lower straight pipe portion is pulled out in the pull-out side yarn passage 5B against the suction air flow and wound up by the winding device 8.

Therefore, even if the static pressure of the suction air flow is reduced, there is no yarn passage so that there is no effect due to the weight of the yarn.
Since the yarn is formed in the horizontal position and the vertical position,
It runs with the feces lowered without the threads getting entangled.

The present invention can be implemented as described above, but with the passage 2
The cross-sectional shape of can also be as shown in FIG.

When forming the yarn storage device, the characteristics of the yarn and the running state of the yarn in the storage device were investigated, and the following matters were found.

Generally, a yarn is subjected to a twist (for example, Z twist), and when the yarn is loosened, the yarn is twisted with each other at a U-shaped folded portion as shown in FIG. Then, a twisting force acts in a direction opposite to the direction of the lower twist to produce a partially entangled snare (S). Such a phenomenon also occurs in the U-shaped folded-back portion in the yarn storage device, and the folded-back portion of the yarn runs while hitting the side wall portion of the slit 5C as shown in FIG. Therefore, as shown in FIG.
If there is a difference between the supply-side yarn passage 5A and the side wall of the slit 5C, the bent tip of the yarn comes into contact with the step and the pipe wall rises, and the shape of the folded portion is U. The shape of the yarn is changed from the letter V to the letter V, and the running state of the accumulated yarn becomes unstable.

On the other hand, the yarn passage 5A and slit 5C in the direction opposite to the twist
If the wall surfaces of the U-shaped folded portions are formed in the same substantially continuous plane, the shape of the U-shaped folded-back portion is stabilized.

For these reasons, the yarn passage 5A and the slit 5C in the passage 2 of the yarn accumulating device are substantially continuous walls whose direction is the same as the direction in which the yarns are twisted together when the sucked yarns are loosened. It must be formed to have a planar shape.

Regarding the twisting of the passage, the yarn on the supply side runs along the twisting direction in any direction with a gentle curvature. However, the yarn on the pull-out side tends to be straight due to the yarn tension generated by the suction air flow. Therefore, when the drawing side yarn is bent, the yarn comes into contact with the tube wall, the yarn tension fluctuates, and the shape of the U-shaped folded portion becomes unstable.

On the other hand, while making the pull-out side yarn run linearly,
Twisting the passage in the same direction as the direction in which it stabilizes as a twisted yarn in the direction opposite to the twisted yarn causes a fluctuation in tension, and also stabilizes the shape of the U-shaped folded portion.

For this reason, when twisting the passage, it is necessary to straighten the drawing-side yarn passage 5B and twist the supply-side yarn passage 5A to form a spiral tube whose axis is the drawing-side yarn passage 5B. There is.

Further, regarding the bending of the passage, the supply side yarn passage is arranged so that the yarn is completely separated so that the yarn does not flow from the supply side yarn passage 5A into the drawing side yarn passage 5B during traveling.
The side where the wall surfaces of 5A and the slit portion 5C are continuous and substantially flush with each other is the outer side, and the side where the supply side yarn passage 5A and the withdrawing side yarn passage 5B are connected by being bent by the slit 5C is the inside. Need to be formed.

When the diameter ratio of the supply side yarn passage 5A and the drawing side yarn passage 5B is set to 45:55 with respect to 50:50, the U-shaped folded portion is improved in V-shape. However, when it is set to 30:70, it becomes V-shaped close to the drawing-side yarn passage 5B, and the supplying-side yarn easily flows into the drawing-side yarn passage, which is not preferable.

Therefore, the diameter ratio between the supply-side yarn passage 5A and the pull-out-side yarn passage 5B needs to be in the range of 45:55 to 30:70, preferably 40:60 unequal cross-sectional shape.

(Effects of the Invention) In the yarn storage device of the present invention, one end of a tube having a passage having a flat cross section is connected to a suction source, and the yarn is sucked from the other end of the opened tube to form the yarn in the tube. In the storage device configured to store, in the pipe, a pair of yarn passages are connected by slits, the yarn passages on the yarn suction side are vertically positioned in the vertical direction, and the yarn passages on the suction source side are arranged in the horizontal direction. Since the shape is twisted at a substantially right angle so as to be located on both sides of, the following effects can be obtained.

(1) Since the yarn passage on the suction side of the storage device is formed in a vertical state and the yarn passage on the suction source side is formed in a horizontal state, the yarn is self-weighted at a low static pressure and a small air flow. Even when it hangs down, it is possible to drive the yarn passages on the left and right of the horizontal passage in a separated state, and it is possible to prevent the yarns from being entangled with each other and from causing a yarn mass or yarn breakage.

(2) Since the passage on the suction source side of the storage device is formed in a horizontal state, it can be bent in the vertical direction and can be easily installed in a narrow space inside the machine base.

(3) The tube is twisted in the same direction as the direction in which the yarns are twisted together when the yarns in which the twisting direction of the pipe is sucked are loosened, or the yarn passage on the supply side is on the drawing side yarn. When the thread is twisted in a spiral shape around the thread passage, it is possible to prevent tension fluctuation in the thread and to stabilize the shape of the U-shaped folded portion of the thread in the tube. it can.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing one embodiment of the yarn storage device of the present invention. FIG. 2 is a schematic view of a textile machine such as a spinning machine in which the yarn storage device of the present invention is installed. FIG. 3 is a schematic view showing another cross-sectional shape of the passage of the yarn storage device of the present invention. FIG. 4 is a schematic view showing a state in which the yarn twisted with the initial twist is loosened. FIG. 5 is a schematic view showing a yarn traveling state when there is a step portion between the supply side passage and the side wall of the slit. FIG. 6 is a view on arrow Z in FIG. 1: body, 2: passage, 3: hose, 4: yarn suction port, 5A: supply-side yarn passage, 5B: drawing-side yarn passage, 5C: slit,

Claims (3)

[Claims] 1. A storage device in which one end of a tube having a passage having a flat cross section is connected to a suction source, and the thread is sucked from the other end of the opened tube to store the thread in the tube. A pair of yarn passages are connected to each other by slits, and the pipes are formed substantially at right angles so that the yarn passages on the yarn suction side are located at the vertical upper and lower positions and the yarn passages on the suction source side are located at both side positions in the horizontal direction. A yarn storage device characterized by having a twisted shape. 2. A pipe characterized in that the pipe is twisted in the same direction as the direction in which the yarns are twisted with each other when the yarns for which the twisting direction of the pipe is sucked are loosened. The yarn storage device according to claim 1. 3. The pipe according to claim 1 or 2, wherein the supply-side yarn passage is formed in a spirally twisted shape with the pull-out side yarn passage as an axis. The yarn accumulating device described in.