JPH0310736B2 - - Google Patents

Description

Detailed Description of the Invention When splicing cut yarn in a device that continuously winds up spun yarn into a package cage or the like after spinning, the yarn end on the spinning side and the yarn end on the package side are connected by suction. The yarn end gripping member consisting of a pipe and a suction mouth suction grips the yarn ends and guides both yarn ends to the knotter to perform the knotting operation. The spun yarn is temporarily sucked into a slack tube during the yarn splicing operation, and when the yarn splicing operation is completed, the suctioned yarn is pulled out and rolled up into a package cage or the like. However, in the above yarn splicing operation, if the slack tube is suctioned before the pair of suction pipes and suction mouth guide both yarn ends, the spinning side yarn end and the package side yarn end, to the knotter, The yarn ends are not guided by the knotter but are sucked into the slack tube, so suction by the slack tube must be done only after both yarn ends have been guided to the knotter.

The suction of the slack tube is carried out by swinging the slack tube so that the opening in the shutter plate provided on the front surface of the slack tube and the suction port at the tip of the slack tube are aligned. If the opening of the shutter plate and the suction port at the tip of the slack tube do not match, the suction operation of the slack tube will not occur.

The above-mentioned swinging of the slack tube is performed by the actuation of the drive means of the knotter wheel on which the knotter is placed at the start of yarn splicing, and the suction port of the slack tube is aligned with the opening of the shutter plate.
In order to separate the suction port of the slack tube from the opening of the shutter plate and prevent the slack tube from being sucked, a slack tube return mechanism that reciprocates at a constant cycle operates to push the slack tube away. Therefore, even when the yarn splicing has been completed and the yarn is being normally wound up into the package, the slack tube will perform a suction operation if the slack tube return mechanism is not operating.

Here, it is assumed that a thread breakage or the like occurs and a thread splicing operation is performed. At this time, the slack tube performs a suction operation and suctions the end of the yarn on the spinning side, but even after the yarn splicing is completed and the knotter wheel moves, the slack tube does not return until the periodically moving slack tube return mechanism is activated. , the slack tube is in the suction position and has a suction effect. At this time, when the yarn breakage occurs again, the knotting operation occurs again, and the suction pipe that suctions and guides the yarn end on the spinning side tries to suck the yarn end on the spinning side and guide it to the knotter, but the knotter Before guiding the yarn end at the spinning end, the yarn end at the spinning end will be sucked into the slug tube before knotting, and even if knotting is successful, fraying will occur, forming defective packages, and causing damage to the slub catcher. Due to this, it was determined that there was a mistake.

The present invention aims to eliminate these inconveniences and, before starting the notching operation,
If there is a slack tube that has a suction effect,
The suction tube was temporarily turned off, and suction was applied immediately before or at the same time as knotting.

An example of an apparatus for carrying out the method of the present invention will now be described with reference to the drawings.

Reference numeral 1 denotes a suction main pipe, which is commonly provided at the back of each spinning/winding unit that is arranged in parallel across the entire width of the machine, and is connected to a suction device (not shown). . A slack tube 2 is swingably provided in the main suction pipe 1 for each spinning/winding unit. That is, the slack tube 2 may be loosely fitted to a cylindrical support piece 3 provided protruding from the main suction pipe 1, or the support piece 3 may be constructed of an elastic member, a bellows, or the like.
A suction port 4 is formed at the tip of the slack tube 2, and the suction port 4 is in pressure contact with a shutter plate 5.
In order to press the suction port 4 against the shutter plate, the slack tube 2 is always urged toward the shutter plate 5 by a spring (not shown). The shutter plate 5 is provided with openings 7 along the running path of the yarn 6 to be wound into a package (not shown) in accordance with the spacing between the spinning and winding units. A slab catcher 8 is provided below the opening 7. A first swinging member 2 that swings the slack tube 2 so that the suction port 7 of the slack tube 2 and the opening 4 of the shutter plate 5 are aligned.
4, and a second swinging member 25 for swinging the slack tube in the opposite direction. The structure will be explained below.

An L-shaped arm 9 is pivotally attached to the slack tube 2 and is biased by a spring 10 to rotate clockwise in FIG. A stopper 11 is provided on the slack tube 2 and prevents the L-shaped arm 9 from turning further. Reference numeral 12 denotes a cam piece provided on the frame 13, and the slope 14 of the cam piece comes into contact with the hanging arm 15 of the L-shaped arm 9. A bar 16 is provided above the slack tube 2 so as to be movable back and forth in the longitudinal direction of the machine. The bar 16 always reciprocates at a predetermined period, and the L-shaped arm 9 and the cam piece 12
etc., constitute a suction port closing means. A claw piece 17 is provided on the bar 16. The claw piece 17 contacts the L-shaped arm 9 when the L-shaped arm 9 is in contact with the stopper 11. The bar 16 is making a traverse motion.

Reference numeral 20 denotes a knotter wheel that performs yarn splicing work by moving between a plurality of units arranged in parallel, and is equipped with a pair of suction pipes and a suction wheel for gripping the cut yarn end and introducing the yarn end into a knotter (not shown). A thread end gripping member (not shown) made of a thread mouth is provided. Reference numeral 21 denotes a swinging arm whose tip abuts against the hanging arm 15 of the L-shaped arm 9 when swinging.

A slack tube re-closing member 26 mounted on the knotter wheel 20 is provided separately from the slack tube swinging members 24 and 25 mentioned above.

Reference numeral 30 denotes a frame to which a substrate 31 is fixed with screws 32. A pressing arm 34 and a swinging arm 3 for pushing the slack tube are attached to the base plate 31 by means of a shaft 33.
5 are supported in a free state from the shaft 33.
A spring 43 urges the pressing arm 34 to rotate clockwise in FIG. A bending piece 36 is provided at the base of the pressing arm 34 and the swinging arm 35.
37, and the bending piece 36 of the pressing arm 34 is pressed against and positioned by the bending piece 37 of the swinging arm 35 by the elastic force of the spring 43. The swinging arm 35 is connected to a swinging arm 39 by a connecting rod 38.
The swinging arm 39 is supported by a shaft 40 and swings as the rod 41 moves up and down.

Next, the effect will be explained.

The bar 16 always reciprocates at a predetermined period, including during normal operation when the slab catcher 8 does not detect a slab and no yarn breakage occurs. On the other hand, the L-shaped arm 9 is pulled by a spring 10 and its tip abuts against a stopper 11. Therefore, the claw piece 17 that has advanced as the bar 16 moves comes into contact with the L-shaped arm 9, and according to the traverse movement, pushes the L-shaped arm 9 downward in FIG. Slack tube 2 is also rotated counterclockwise about support piece 3 (Fig. 3), and slack tube 2
The suction port 4 at the tip of the shutter plate comes into contact with the non-opening portion of the shutter plate, and air suction from the suction port 4 is prevented.

If a thread breakage or the like occurs under this condition, the knotter wheel stops at a position corresponding to the thread breakage unit in response to a signal from the slab catcher 8, and the knotter wheel's thread gripping device (not shown) grips the cut supply side yarn end and the package side yarn end of the yarn 6 and guides them to a knotter (not shown), and when the knotter bill of the knotter grips the supply side yarn end, the suction port 4 of the slack tube 2 is connected to the shutter plate. 5. Swing the slack tube 2 so that it aligns with the opening 7 of the slot 5. That is, in response to the signal from the slab catcher 8, the swinging arm 21 pivots clockwise in FIG.
It comes into contact with the hanging arm 15 of the L-shaped arm 9 and rotates the L-shaped arm 9 as shown by the dashed line. At this time, since the hanging arm 15 of the L-shaped arm 9 is in contact with the slope 14 of the cam 12, as the hanging arm 15 turns counterclockwise in FIG. 2, the hanging arm 15 moves upward in FIG. As a result, the slack tube 2 integrated with the L-shaped arm 9 also swings about the support piece 3 in the direction of the line shown in FIG. will match. By aligning the suction port 4 with the opening 7, the slack tube 2 suctions the yarn from the opening 7 and takes up the slack.

After the thread splicing of the knotter is completed, the swinging arm 21 is rotated counterclockwise to release the hanging arm 15, and the L
The second arm 9 is moved by the elastic force of the spring 10.
Return to the solid line position in the figure. Therefore, when the bar 16, which is making a traverse movement, moves downward in FIG. 3, the claw piece 17 comes into contact with the L-shaped arm 9 and pushes it downward (in FIG. 3). The slack tube 2 also swings to the position shown in FIG. 3, and the suction port 4 is at a position offset from the opening 7, and the suction action is stopped.

As mentioned above, even after completing one thread splicing operation,
Since the bar 16 reciprocates intermittently, if the timing of movement of the bar 16 is not reached, the suction port 4 will continue to align with the suction port 4 of the slack tube 2 and will be in a state where the yarn can be sucked into the slack tube. There is. At this time, if the previous thread splicing operation was unsuccessful or the thread breaks again, the thread splicing operation must be performed again, but the suction of the slack tube If the opening 4 and the opening 7 of the shutter plate 5 match, the end of the yarn will be sucked during the yarn splicing operation again, which is inconvenient for the work. Therefore, the slack tube 2 is swung independently of the bar 16. The suction port 4 is shifted from the opening 7 of the shutter plate 5.

This operation is as follows.

The knotter wheel, which has stopped at the unit in response to the thread splicing signal, moves up the rod 41 by the operation of a driving section (not shown). As the rod 41 rises, the swinging arm 39 swings clockwise in FIG. 1, and the swinging arm 35 also swings clockwise via the connecting rod 38. At this time, the refracting piece 37 integrated with the swinging arm 35 also pivots, but the refracting piece 36 integrated with the swinging arm 21, which is in pressure contact with the refracting piece 37 due to the elastic force of the spring 43, The restraint is released by the rotation of the slack tube pressing arm 34.
The roller also rotates clockwise and presses the slack tube 2 with the roll 43 at its tip. By this pressure, the suction port 4 at the tip of the slack tube 2 is shifted from the opening 7 of the shutter plate 5, and the suction port 4 is closed. As a result, the slack tube 2 is no longer able to suction the yarn plate 6.

Under this condition, the knotter wheel starts splicing operation. That is, before the above-mentioned closing operation of the slack tube 2, the suction mouth for suctioning the yarn end on the package cage side moves downward from the normal position located above to the package cage side and suctions the yarn end on the package cage side.
The intermediate pipe that suctions the yarn end on the spun yarn side rises from the normal position located below to the spinning side and suctions the spun yarn end, and after the aforementioned slack tube is closed, it suctions the yarn end on the package cage side. The suction mouth rises, and the intermediate pipe that suctions the yarn end on the spinning side suctions the yarn end on the spinning side and descends, guiding the package side yarn end and the spinning side yarn end to the knotter, and guides the yarn end of the knotter. introduces both thread ends into the knotter. The knotter bill is then rotated to perform knotting, and at the same time or just before the knotting is performed, the slack tube is unoccluded. After knotting is completed, the thread guide will return to its original position. FIG. 4 shows the operation of each part during the above-mentioned knotting.

As detailed above, in the method of the present invention, the opening of the slack tube is opened at the same time as or just before the knotting operation, and the opening is closed until then. When guiding the thread to the knotter, it is possible to prevent the occurrence of a situation where the thread is sucked into the slack tube before knotting, and to prevent the occurrence of fraying caused by the thread being sucked into the slack tube before knotting.
It is possible to eliminate the formation of defective packages and the misjudgment that the slab catcher is missing.

[Brief explanation of the drawing]

FIG. 1 is a front view of the slack tube pressing arm swinging mechanism, FIG. 2 is a side view of the slack tube swinging member, and FIG. 3 is a plan view of the slack tube swinging member excluding the slack tube pushing arm swinging mechanism. FIG. 4 is an operation timing diagram of each part of the yarn splicing device. 2... Slack tube, 4... Suction port.

Claims (1)

[Claims] 1. In a yarn splicing method in which the feeding side yarn end and the package side yarn end are each held by a yarn end gripping member, both yarn ends are guided to a knotter, and the feeding side yarn is sucked by a slack tube while knotting is performed, the knotting operation is performed. Before performing the knotting operation, the suction port of the slack tube is closed by a blocking means that performs a periodic closing operation, and the suction port of the slack tube is unblocked immediately before or at the same time as the knotting operation, and the suction port of the slack tube is unblocked. After knotting is completed, the suction port of the slack tube is closed after the yarn in the slack tube is pulled out.
A yarn splicing method characterized in that, when the knotting operation is unsuccessful, the closing means is operated to close the suction port of the slack tube again, regardless of the periodic closing operation of the closing means.