JPH0327648B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting nozzle clogging in a spinning device.

[Conventional technology]

A spun yarn manufacturing apparatus is known in which a sliver is drafted by a pair of draft rollers, and the drafted fiber bundle (short fiber bundle) is drawn into a nozzle unit having a nozzle that blows out pressurized air and twisted. .

In such devices, when the fiber bundle is introduced into the nozzle unit, the short fibers surrounding the fiber bundle may fall off and separate from the fiber bundle, or the tips of the short fibers entangled with the fiber bundle may When cut, etc., it may accumulate around the suction port of the nozzle unit or inside the nozzle, causing nozzle clogging.

If such a situation occurs, it will naturally lead to a situation such as thread breakage, but currently, when a thread breakage signal is issued, an operator manually removes the attached fibers around the nozzle.

The thread breakage signal mentioned above is issued by the slub catcher, but when the thread thickness exceeds the specified limit above or below, the slub catcher senses this and cuts the thread itself, sending a signal to cut the thread. There are two ways to do so: when thread breakage occurs due to other causes and a thread cut signal is issued, but in the latter case, 90% of the cases are due to short fibers or thread waste adhering to the inlet of the nozzle unit. This is thread cutting due to

Therefore, in order to prevent the accumulation of dust containing short fibers or thread waste near the fiber bundle inlet of the nozzle unit, the nozzle unit is placed at a position where its suction port is close to the nip point of the front roller and away from the position. The dust collection box is supported by a supporting member so that it can be approached and separated from the nip point, and the suction port of the nozzle unit retreats and advances into the empty space created at the position close to the nip point. The present inventor has developed a nozzle cleaning device that swingably supports a series of suction pipes.

The device is used as follows. That is, the yarn suction port of the nozzle unit, which is provided with the yarn suction port close to the front roller side of the draft part, is separated from the front roller of the draft part by swinging the swinging member that supports the nozzle unit. , an empty space is formed on the front roller side. On the other hand, the suction pipe connected to the dust box of the cleaning device is swung forward so that its tip reaches the hollow part, and a suction airflow is generated in the suction pipe to remove the thread waste near the thread suction port of the nozzle unit and the front roller. , short fibers, etc. are removed by suction.

[Problem to be solved by the invention]

When the above-mentioned cleaning device is operated, accumulated fuzz, short fibers, etc. near the front surface of the front roller pair are suctioned and removed by the suction pipe.
It is difficult to detect fibers etc. that have adhered to the inside of the suction port of the nozzle unit, and even if you use the above-mentioned cleaning device, the success or failure of removing them is mixed, and if you start the next spinning without clogging the area. Problems also occurred in the introduction of the fiber bundle into the nozzle unit.

In view of the above points, an object of the present invention is to know the presence or absence of nozzle clogging and the degree of nozzle clogging after using the above-mentioned cleaning device.

[Means to solve the problem]

The present invention provides a spinning apparatus having a drafting device for drafting a sliver and a nozzle unit for twisting the sliver passed through the drafting device to form a binding yarn, in which a hollow pipe connected to a flow meter is connected to a suction port of the nozzle unit. After that, the nozzle unit is operated to suction the air in the hollow pipe, and if the air flow rate generated in the hollow pipe toward the nozzle unit as measured by the flowmeter is less than a predetermined value, the nozzle This is a method for detecting nozzle clogging in a spinning device for detecting the presence of clogging.

〔Example〕

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

The spinning device of the present invention comprises a draft part (draft device) 5 consisting of a back roller 1, an apron 3 spanning a middle roller 2, and a front roller 4.
Next, the front roller 4 of draft part 5
Nozzle units 7 are arranged in a row for taking in and twisting fiber bundles 6 from the fibers.

The nozzle unit 7 has a cylindrical shape as a whole, and has a nipple 8 forming a suction port at the center of the conical head, and passes through the thread hole 9 for taking in the fiber bundle 6 exiting the draft part 5. are doing. First and second nozzles 10 and 11 facing the thread threading hole 9 are provided at the front and rear stages of the thread threading hole 9, respectively. The first nozzle 10 blows out pressurized air that is inclined in the direction of the thread traveling in the thread passing hole 9 and urges the thread to be sent in the thread running direction, and is used to inject the fiber inlet to the nozzle unit, that is, the nipple 8. A suction air current is generated near the inlet of the nozzle unit 7, and the fiber bundle 6 is drawn into the nozzle unit 7. Further, the second nozzle 11 opens obliquely in the tangential direction to the thread threading hole 9, and blows out pressurized air that guides the thread in the thread threading hole 9 toward the nozzle exit direction. An opening 12 is provided in the middle of the second nozzle, and the jet stream ejected from the first nozzle 10 is directed to the opening 12.
exits from the nozzle unit.

The nozzle unit 7 is supported by a swinging arm 14 that has a shaft 13 as its fulcrum, and as shown in FIG.
When it advances near the nip point and swings counterclockwise, an empty space 15 is created near the nip point, as shown in FIG.

A base end on the side of the pivot shaft 40 is connected to the dust box 41 toward the empty part 15, and the shaft 40
A suction pipe 42 that can freely turn around is provided so as to be able to approach and leave the suction pipe 4.
2 and the dust box 41 constitute a cleaning device.

The suction pipe 42 and the dust box 41 are mounted on a cart 25 that runs in front of the spinning device, and the turning operation of the suction pipe 42 is controlled by a cam 3 which will be described later.
It is driven by a cam mechanism such as 0 at a predetermined timing. That is, by driving the cam, the suction pipe 42 turns counterclockwise from the first illustrated position, and its suction port 42a enters the empty space 15. Since the suction pressure (arrow A) is generated by a blower device (not shown), the suction port 42a is empty.
At the same time as the dust enters the empty part 15, wind lint, etc. accumulated near the empty part 15 are sucked and collected into the dust box 41 through the pipe 42, and after a certain period of time, the suction pipe 42 returns to the state shown in the first figure. It then turns and returns to its retracted position.

Next, a device for detecting nozzle clogging in the nozzle unit 7 cleaned in this manner will be explained.

That is, the close opening 2 of a hollow pipe 26 connected to a flow meter 28, which will be described later, is directed toward the hollow portion 15.
The connector 37 is connected to the front roller 4 as a device for connecting the close opening 20 and the nipple 8 of the nozzle unit 7.
and the nozzle unit 7.

The connector 37 swingably supports the communication pipe 16 on the support member 17.
Normally, the nozzle unit 7 retreats forward from the empty part 15, but when the nozzle unit 7 rotates downward to create the empty part 15, it enters the empty part 15 without coming into contact with the nozzle unit 7. It has been made possible to do so. The support member 17 is fixed to an appropriate member separate from the swing arm 14, and is attached to the shaft 1.
8 supports the end of the communication pipe 16 in a swingable manner. A spring 19 is inserted into the shaft 18, so that the tip of the communication pipe 16 is always connected to the support member 17.
ie, in a direction away from the empty portion 15. On the front side of the base of the communication pipe 16, there is a concave part 21 that contacts the close opening 20 of a hollow pipe 26 connected to a flow meter 28, which will be described later. A recessed portion 22 is provided with which the nipple 8 comes into contact, and the recessed portion 2
1 and the recess 22 are connected by a conduit 23. As mentioned above, the tip of the communicating pipe 16 is located outside the hollow part 15 during spinning, but after cleaning the hollow part 15 and the thread passing hole 9 including the nipple 8 of the nozzle unit 7. During the nozzle clogging detection operation, the end portion is positioned within the empty space 15 as will be described later.

The draft part 5 and nozzle unit 7 are as follows:
A plurality of units are installed side by side on a machine base 24, and a trolley 25 runs in front of it.
When cleaning the unit on the machine base 24 side, the trolley 25 stops in front of the unit, first enters the suction pipe 42 into the air 15 to perform the cleaning operation, and then cleans the nozzle of the nozzle unit 7. Performs an operation to detect whether there is a blockage.
That is, a hollow pipe 26 is provided on the trolley 25 so as to be swingable, and a flow meter 28 is connected to the base of the hollow pipe 26 via a flexible tube 27.

A swing arm 29 is integral with the hollow pipe 26, and is connected by a connecting rod 33 to a swing arm 32 that abuts the cam 30 via a cam follower 31. The swing arm 32 is urged toward the cam 30 by a spring 34. The suction pipe 42 of the cleaning device is also operatively connected to a disk cam that is coaxial with the cam 30 and is separate from the cam 30 by a mechanism similar to the swing arm 29, connecting rod 33, swing arm 32, and spring 34. The explanation of its structure will be omitted.

However, between the cam that drives the pivoting motion of the suction pipe 42 and the cam 30 that drives the pivoting motion of the hollow pipe 26, the former cam operates the pipe 42 earlier in timing, and the latter cam 30 operates the pipe 42 earlier in timing. After the rotation of the pipe 42 returns to the previous position, the pipe 2
6 is now operating.

It is now assumed that the truck 25 has stopped and the cleaning device has been activated to remove dust including short fibers accumulated between the nozzle, the unit 7, and the front roller 4 of the draft part 5. Therefore, first, the nipple 8 portion of the nozzle unit 7, which is provided close to the front roller 4, must be separated from the front roller 4. Nozzle unit 7
The swinging arm 14 supporting the is pivoted counterclockwise about the shaft 12 as shown in FIG. 1 by appropriate means. As a result, an empty space 15 can be created between the front roller 4 and the nipple 8 at the tip of the nozzle unit. Therefore, first, the dust collection suction pipe 4
2 is rotated to position the suction port at the tip near the nipple 8 of the nozzle unit 7 and the hollow part 15, and suction is started to remove accumulated fibers, dust, etc. from the part. After a predetermined period of time has elapsed, the suction pipe 42 for dust collection retreats, and then, in its place, the hollow pipe 26 for detecting nozzle clogging advances toward the hollow part 15.

The retraction of the dust collection suction pipe 42 and the advance of the nozzle clogging detection hollow pipe 26 are performed at predetermined timings by the rotation of the camshaft 35, as described above. The rotation of the cam 30 based on the rotation of the camshaft 35 causes the swinging arm 3 to move through the cam follower 31.
2 is pulled by the spring 34 and rotates counterclockwise, and the hollow pipe 26 rotates counterclockwise via the connecting rod 33 and the swing arm 29, and the close opening 2 at the tip of the hollow pipe 26 rotates counterclockwise.
0 swings to the front side, contacts the concave part 21 provided in the communicating pipe 16 of the connector 37 whose tip is protruding, and then empties the communicating pipe 16 against the elastic force of the spring 19. Push it into the bottom part 15 and stop. At this time, the concave portion 22 on the lower surface of the communication pipe 16 is connected to the nipple 8 of the nozzle unit 7.
Located at the top of the list. When the nozzle unit 7 is now raised, the nipple 8 comes into contact with the concave portion 22 on the lower surface of the communicating pipe 16. As a result, the opening part 12 of the nozzle unit 7, the thread passing hole 9,
Conduit 23 of communication pipe 16, close port 20, hollow pipe 26, flexible tube 27, flow meter 2
8 and one circuit is formed.

Therefore, after the above operation, if the nozzle unit 7 is operated to blow out compressed air from the first and second nozzles 10 and 11, if there is no blockage in the vicinity of the nipple 8, the nozzle will flow into the hollow pipe 26. An air flow (arrow B) is generated in the direction of the unit 7, and the flow meter 28 detects a large flow rate.If the cleaning device does not clean enough and the vicinity of the nipple is clogged with fiber debris, the flow meter 28 detects a large flow rate. Detects extremely small flow rate or zero flow rate.

Then, the measured flow rate value is displayed on a display (not shown), and the operator knows from the displayed value that there is an abnormality and performs suction cleaning of the part, or performs manual cleaning.

Further, a flow rate comparison/notification device may be connected to the flow meter 28, which sounds an alarm and notifies the operator when this measured value is compared with a preset value and the measured value is smaller. .

When the nozzle clogging detection is completed, the close opening 20 is moved back by the rotation of the cam 30. Therefore, the tip of the communicating pipe 21 of the connector 37 protrudes toward the front of the machine base due to the elastic force of the spring 19, and exits from the hollow portion 15. Therefore, the swinging arm 14 is pivoted clockwise in FIG. 1 to bring the nipple 8 of the nozzle unit 7 closer to the front rollers 4, 4, and spinning is resumed.

〔Effect of the invention〕

The present invention detects nozzle clogging as described above in a spinning device in which a fiber bundle twisting nozzle unit is provided on the front roller side of the draft part. Even if there is a blockage, it can be detected reliably.

[Brief explanation of drawings]

Fig. 1 is a side view of the device according to the present invention, Fig. 2 is a sectional view of the nozzle unit, Fig. 3 is a front view of the connector, Fig. 4 is a right side view of the same, and Fig. 5 is a bottom view of the same. . 4...Front roller, 5...Draft part (draft device), 7...Nozzle unit, 8...
Nipple (suction port), 9... Thread hole, 26... Hollow pipe, 28... Flow meter, 37... Connector.

Claims (1)

[Claims] 1. In a spinning device having a drafting device for drafting a sliver, and a nozzle unit for twisting the sliver passed through the drafting device to form a binding yarn, a hollow pipe connected to a flow meter is tightly attached to a suction port of the nozzle unit. After that, the nozzle unit is operated to suck the air in the hollow pipe, and if the flow rate of air generated in the hollow pipe toward the nozzle unit as measured by the flowmeter is less than a predetermined value, the nozzle is clogged. A method for detecting nozzle clogging in a spinning device.