JPH08246274A - Method for feeding sliver in piecing and piecing auxiliary apparatus - Google Patents

Abstract

PURPOSE: To provide a sliver feeding method in piecing, capable of stabilizing fiber amount and timing of sliver fed to a piecing point in piecing and carrying out stable piecing and provide a piecing auxiliary apparatus. CONSTITUTION: A sliver bent member 4 is advanced to a sliver road between a stopped draft roller and draft roller continuing driving when feed of a sliver S is stopped and bent to ensure a prescribed amount of sliver S and, when draft is reopened, a sliver bent member 4 is evacuated and the secured sliver S is fed. When feed of the sliver is stopped, once stopped draft roller is rotated by a prescribed amount to supplement the sliver S between draft rollers and the sliver is fed together with reopening of the draft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliver supply method and a piecing auxiliary device during piecing.

[0002]

2. Description of the Related Art Conventionally, as a piecing method in a spinning machine, a method in which a newly spun yarn (upper yarn) and a winding side yarn (lower yarn) are spliced with a mechanical notter or a splicer has been generally used. However, in recent years, instead of the piecing method of splicing these yarns together, the yarn end on the winding side is guided to the twisting part or draft part of the spinning machine, and the sliver yarn end newly supplied by restarting spinning. A piecing method has been developed in which the yarn end on the winding side is joined to the yarn end on the winding side.

In the above piecing method, when a yarn breaks, a yarn is forcibly cut by detecting a yarn defect such as a slab, or when a full winding package is doffed, a back roller or a back roller is detected by those detection signals. If the supply of the sliver is stopped by forcibly stopping the third roller, the sliver will be torn between the stopped draft roller and the draft roller (middle roller) that continues to be driven. However, at this time, the fibers at the tip of the sliver are removed while the fibers are displaced, so that the fiber density of the tip of the sliver is insufficient as compared with a normal draft, and the tip position of the sliver varies. . Therefore, if the supply of the sliver is restarted during the piecing from such a state, the amount of the sliver initially supplied to the piecing point is small, and the timing of reaching the piecing point varies, and the joint portion becomes thin. There was also a problem that it could cause piecing failure.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention is to stabilize the fiber amount and timing of the sliver supplied to the piecing point during piecing to perform stable piecing. It is an object of the present invention to provide a sliver supply method and a piecing auxiliary device at the time of piecing, which are capable of performing the above.

[0005]

[Means for Solving the Problems] When the sliver supply is stopped,
A predetermined amount of sliver is secured by bending the sliver between the draft roller that stops and the draft roller that continues to drive, and when the draft is restarted, the secured sliver is released from the bent state and the sliver is driven. Supplied to the piecing point through the draft roller that was continued.
Further, when the sliver supply is stopped, the draft roller that has been stopped is rotated by a predetermined amount, and the sliver is replenished between the draft roller and the driving draft roller. Is supplied to the piecing point through the draft roller that was continuously driven. A sliver bend member that advances and retreats with respect to the sliver path between the draft roller that stops and the draft roller that continues to drive is provided as a device that performs this by a yarn break signal or a full winding signal.

[0006]

When the yarn break signal or the full winding signal is transmitted, the sliver bend member advances into the sliver path, bends the sliver between the draft roller that stops and the draft roller that continues to drive, and the fiber at the tip of the sliver is removed. The sliver of a predetermined amount is secured by suppressing excessive withdrawal.

After the sliver supply is stopped, if the stopped draft roller rotates by a predetermined amount, the sliver is fed between the draft roller and the driving draft roller on the downstream side to be replenished. At this time, by advancing the sliver bend member to the sliver road and bending the sliver outside the normal passage locus, even if the fiber at the tip of the refilled sliver reaches the driving draft roller and is removed. A sliver of a predetermined length is secured, and the floating fibers remaining when the sliver is torn apart when the roller is stopped are removed from the sliver tip, so that the sliver tip is made uniform in length.

When the bending state of the sliver secured by the predetermined amount is released during piecing, the tip of the sliver is immediately supplied to the piecing point through the draft roller being driven.

After stopping the supply of the sliver, if the upstream roller of the stopped two draft rollers is rotated by a predetermined amount, a predetermined amount of the sliver can be secured between the two draft rollers.

[0010]

Embodiments will be described with reference to the drawings.

FIG. 1 shows a drafting device 1 and a twisting device 2 of a four-wire spinning machine for carrying out the sliver supply method during piecing of the present invention. In the figure, the draft device 1 is composed of four lines of a back roller 11, a third roller 12, a middle roller 13 mounted with an apron belt, and a front roller 14. Among these, many middle rollers 13 and front rollers 14 are arranged side by side. The unit is integrally formed on a line shaft common to each unit of the spinning machine, and all the units are driven simultaneously, but the back roller 11 and the third roller 12 can be stopped individually for each unit. That is, the back roller 11 and the third roller 12 rotate the line shaft 15 through the gears 16 and 17 provided for each unit and the clutch 18 integrated with the brake, and the unit single shaft 1
A belt 2 wound around a pulley 19p provided at one end of the unit single shaft 19 and pulleys 11p and 12p provided at respective rotary shafts of a third roller and a back roller.
It is possible to forcibly stop each unit by being driven at a predetermined peripheral speed ratio by 0, disengaging the clutch 18, and operating a brake integrated with it.

Between the third roller 12 and the middle roller 13 of the draft device 1, a width condenser 3 for restricting the width of the sliver S is supported and fixed by a support plate 31, and the width condenser 3 side of the middle roller 13 is provided. A sliver vent member 4 is provided adjacent to the sliver vent member 4 as a piecing assist device so that the sliver vent member 4 can move forward and backward along the sliver road.

The sliver vent member 4 is swingably supported by a bracket 40, as shown in FIGS.
In addition, the swing arm 41 is integrally formed at one end of the swing arm 41 which is biased in the clockwise direction in FIG. 2 by a return spring (not shown) and has a plate shape.
When the sliver S is swung in the counterclockwise direction to the front of the width condenser 3, the sliver S is swung normally during spinning.
A sliver support edge 4a located above the sliver support edge 4a is formed, and a front edge in the traveling direction on the left side in FIG. 2 of the sliver support edge 4a forms a guide edge 4b inclined with respect to the traveling direction. . Reference numeral 4c is a guide groove that engages with the guide pin 32 provided on the support plate 31, and is formed in an arc shape along the swing direction of the sliver vent member 4.

The other end of the swing arm 41 is bent 90 ° and extends substantially parallel to the spinning direction, and a cam 42 is formed at the extended portion. The cam 42 is provided along the moving direction of a cam roller 43 supported by a swing arm 44 described later.

The twisting device 2 includes an air spinning nozzle 21 for internally generating swirling air by compressed air injection, a nozzle block 22 for the air spinning nozzle 21, and a spindle (a yarn guide) having its tip positioned in the air spinning nozzle 21. Tube 23 and a spindle support member 24 that supports the pipe 23. The spindle support member 24 is slidably supported by a guide bar 26 projecting from the nozzle block 22 side, and the spindle support member 24 and The swing shaft 4 is attached to the integral support shaft 25.
4 is engaged. The piston rod 46 of the air cylinder 45 is connected to the intermediate portion of the swing arm 44.

Next, a sliver supply method during piecing will be described based on the above embodiment.

When a detection signal is output from a detection sensor (not shown) due to occurrence of yarn breakage or full package winding, the clutch 18 of the draft device 1 is disengaged, and the brake integrated with the clutch 18 is operated to activate the unit unit. Axis 1
The rotation of 9 is stopped, whereby the back roller 11 and the third roller 12 are forcibly stopped. At this time, since the middle roller 13 and the front roller 14 are still driven, the sliver S is torn between the middle roller 13 and the third roller 12. At this time, at the tip of the cut sliver S, the fibers are randomly drawn out while causing the fibers to be displaced, so that the remaining floating fibers have a lower fiber density than other portions.

Then, the air cylinder 45 is actuated to extend the spin rod 46, whereby the swing arm 44 swings as indicated by 44 'in FIG. 1, and the spindle support member 24 and the spindle 23 move in the direction 24 in the figure. The nozzle blocks 22 and the air spinning nozzles 21 are separated from each other as indicated by ', 23'. At the same time, the cam roller 43 is changed to 43 in FIG. 1 and FIG.
By moving as shown by ', the cam 42 is brought into contact with the cam 42, and the cam 42 is pushed down as shown by 42' in the figure. As a result, as shown in FIG. 2, the swing arm 41 swings like 41 ', and the sliver vent member 4 advances laterally to the sliver path as shown by 4'in the figure, and the middle roller 13 and the third roller 12 are moved.
The tip of the sliver S positioned between and is supported by the guide edge 4b on the sliver support edge 4a, and the tip of the sliver S is bent upward as shown by the solid line in FIG. Raise from Road Sw.

Subsequently, the unit single shaft 19 is provided by appropriate means.
By a predetermined amount (corresponding to half rotation of the third roller 12) to rotate the third roller 12 and the back roller 11,
If the sliver S is moved forward as shown by the chain double-dashed line in FIG.
Although the tip of the sliver S reaches the middle roller 13, it is bent and locked by the sliver vent member 4,
Only the floating fibers at the tip of the sliver S have the middle roller 13
Are removed by. Therefore, the fiber density at the remaining tip of the sliver S is sufficiently secured. Further, the sliver S replenished by the forward movement is bent to secure a predetermined amount.

In parallel with the above operation, the yarn end Y on the winding side is separated by the twisting device 2 from the spindle 2 by a device (not shown).
It is threaded back to 3 '. Then, from this state, the piston rod 46 of the air cylinder 45 is shortened and the swing arm 44 is swung to the right from the position 44 'shown by the two-dot chain line in FIG. 1 to return the spindle 23 to the original position. The cam roller 43, which has pushed down the cam 42 at the 43 position, is separated from the cam 42, and the swing arm 41 is returned to the original position by the bias of the return spring (not shown). Moves sideways from the sliver running path Sw. At the same time, the clutch 18 is connected to rotate the third roller 12 and the back roller 11 to restart the supply of the sliver S and the drafting, and the spinning is restarted. While being spun inside, piecing is performed integrally with the yarn end on the winding side located at the tip of the spindle 23.

At this time, as described above, by sufficiently securing the fiber density at the tip of the sliver S, the fiber amount at the tip of the fibers forming the sliver reaching the piecing point is secured, and the yarn at the joint portion becomes thin. This situation does not occur, and since the bent sliver S tip is taken up by the middle roller 13 at the same time as the sliver vent member 4 withdrawing in conjunction with the return of the spindle 23, the timing to reach the piecing point is always constant. Therefore, piecing can be performed with a constant seam length.

In the above embodiment, the case where the sliver vent member 4 is advanced to the sliver path after the rotations of the third roller 12 and the back roller 11 are stopped has been described, but the third roller 12 and the back roller 11 are stopped. Before moving the sliver vent member 4 into the sliver running path Sw,
The same effect can be obtained by bending the sliver S upward and stopping the third roller 12 and the back roller 11 after a predetermined rotation (corresponding to a half rotation of the third roller 12) in the locked state. Further, the sliver vent member 4 may be lifted from directly below the sliver path. Further, the sliver vent member 4 may also be used as the width condenser 3 without separately providing the width condenser 3 itself.
Alternatively, it may be lowered or rotated.

Next, another embodiment of the sliver supply method during piecing of the present invention will be described with reference to FIGS.

In the draft device 201 shown in FIG. 4, the width condenser 2 is provided between the third roller 12 which is stopped when the draft is stopped and the middle roller 13 which is continuously driven.
A clamp 202 for holding the sliver S between the width condenser 203 and the bottom surface 204 is provided.

Then, in response to a signal generated when yarn breakage occurs or when the package is fully wound, the back roller 11 and the third roller 12 are forcibly stopped by the same mechanism as in FIG. At the same time when the sliver S is torn off with the roller 13, the clamp 202 presses against the bottom surface 204 of the width condenser 203 to grip the tip end of the above-mentioned torn sliver S, and then the back roller 11 and the third roller. 12 is a predetermined amount (third roller 12
Rotation of the sliver S by advancing to supplement the sliver S by rotating the sliver S between the clamp 202 and the third roller 12 at the same time as starting rotation of the third roller 12 and the back roller 11 when restarting the draft. Clamp 2
When 02 is separated from the width condenser 203 and the grip is released, the tip of the replenished sliver S is supplied to the twisting device 2 side, which is the piecing point, through the middle roller 13, and the piecing seam yarn is obtained. It is prevented from becoming a fine thread.

At this time, the contacting / separating operation of the clamp 202 can be performed via a cam or the like by the operation of the air cylinder 45 similarly to the sliver bend member 4 described above. When the draft is stopped, first, the clamp 202 is brought into pressure contact with the width condenser 203 to tear the sliver S between the clamp 202 and the middle roller 13, and then the third roller 12 and the back roller 11 are stopped after a predetermined rotation. You may do it.

Next, another embodiment of the sliver supply method during piecing of the present invention will be described with reference to FIG.

In the draft device 301 shown in FIG. 6, the back roller 11 and the third roller 12 are individually provided with clutches 3.
02 and 303 are provided, and the rotation of the common drive shaft 304 can be transmitted to the draft rollers 11 and 12 via the belts 305 and 306 and the clutches 302 and 303, whereby the back roller 11 and the third roller 12 can be rotated. It can be driven and stopped independently.

When the yarn breakage occurs or the package is fully wound, the clutches 302 and 303 are disengaged, and the back roller 11 and the third roller 12 are forcibly stopped by a brake (not shown) integrated therewith to stop. After the sliver S is disengaged between the third roller 12 and the middle roller 13 which continues to be driven, the clutch 302 is engaged for a predetermined time to rotate only the back roller 11 by a predetermined amount. Sliver S is sent between 12 and loosened. When the clutches 302 and 303 are closed at the same time when the draft is restarted, the back roller 11 and the third roller 12 start rotating at the same time. However, due to the peripheral speed difference between them, the sliver S in the loosened bent state is The sliver S having a sufficient fiber amount is supplied to the piecing point because the fiber amount is not drafted between the third roller 12 and the back roller 11 and is immediately delivered from the third roller 12 to the middle roller 13 side with the same fiber amount. Will be. In this case, compared with the case where the sliver S is bent between the middle roller 13 and the third roller 12 as in each of the above-described embodiments, the sliver S in the bent state is delayed from the third roller 12 in timing. However, since the timing difference is small and constant, there is no problem in practical use.

In each of the above embodiments, the 4-wire type draft devices 1, 201 and 301 have been described, but the present invention can be applied to a 3-wire type or a 5-wire type or more draft device. Of course. In each of the above embodiments,
When tearing the sliver S between the middle rollers, that is,
The case where the third roller 12 and the draft roller (back roller 11) on the upstream side of the third roller 12 are stopped has been described. However, including the case where the middle roller 13 is also stopped, the upstream side from any draft roller is used as a stop roller. Although it is feasible, the third roller 12 and the middle roller 13 near the piecing point and the draft roller on the upstream side thereof are used as stop rollers, and the sliver S is bent between the two draft rollers including the middle roller 13 near the piecing point. It is advantageous in terms of timing and stabilizing the fiber amount.

Further, in each of the above embodiments, the case where the piecing is performed by the twisting device 2 in which the spindle 23 is positioned in the air spinning nozzle 21 is shown, but the present invention is not limited to this, and the spinning is restarted. It should be added that other devices for piecing can also be implemented.

[0032]

Since the present invention is configured as described above, it has the following effects.

When the sliver supply is stopped, a predetermined amount of sliver is secured by bending the sliver between the draft roller that stops and the draft roller that continues to drive, and when the draft is restarted, the secured sliver bending state is released. Then, since the sliver is supplied to the piecing point through the draft roller which has been continuously driven, at the time of piecing, the fiber amount of the sliver initially supplied to the piecing point is sufficient and constant,
The timing at which the tips of the fibers forming the sliver reach the piecing point becomes constant, and piecing can be reliably performed.

Further, when the supply of the sliver is stopped, the draft roller once stopped is rotated by a predetermined amount, and the sliver is replenished between the draft roller and the draft roller on the downstream side thereof. Since the replenished sliver is supplied to the piecing point through the draft roller that has been continuously driven, it is possible to ensure a predetermined sliver amount between the draft rollers and the fiber of the sliver that is initially supplied to the piecing point during piecing. The amount is sufficient and becomes constant, and piecing can be reliably performed.

As a piecing assisting device, a sliver bend member for advancing and retracting with respect to the sliver path between the draft roller that stops and the draft roller that continues to drive is provided by a yarn break signal or a full winding signal, so that a simple structure is provided. Thus, a sliver having a fixed length and a sufficient fiber amount necessary for piecing can be secured, synchronization with the piecing operation can be easily achieved, the sliver supply timing is stable, and piecing can be reliably performed.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing a spinning machine equipped with a piecing assisting device for carrying out the method of the present invention.

FIG. 2 is a front view showing a piecing assisting device according to an embodiment of the present invention.

FIG. 3 is a side view of essential parts showing a state in which the sliver is bent by the piecing assist device of the embodiment of the present invention.

FIG. 4 is a side view of essential parts showing a spinning machine according to another embodiment for carrying out the method of the present invention.

5 is a perspective view taken along line VV of FIG.

FIG. 6 is a side view of essential parts showing a spinning machine according to still another embodiment for carrying out the method of the present invention.

[Explanation of symbols]

 1,201,301 Draft device 2 Twisting device 3,203 Width condenser 4 Sliver Bend member (Piecing auxiliary device) 18,302,303 Clutch 41 Swing arm 42 Cam 43 Cam roller 44 Swing arm 45 Air cylinder 202 Clamp S sliver

Claims (3)

[Claims] 1. When a sliver supply is stopped, a predetermined amount of sliver is secured by bending the sliver between a draft roller that stops and a draft roller that continues to drive, and when the draft is restarted, the secured sliver is driven. A sliver supply method during piecing, characterized in that the piecing point is supplied through a continuous draft roller. 2. When the sliver supply is stopped, the draft roller that has been stopped is rotated by a predetermined amount after that, and the sliver is replenished between the draft roller and the draft roller on the downstream side of the draft roller. A sliver supply method during piecing, characterized in that the replenished sliver is supplied to a piecing point through a draft roller that has been continuously driven. 3. A piecing assist device comprising a sliver bend member which advances and retreats with respect to a sliver path between a draft roller which is stopped and a draft roller which is continuously driven by a yarn break signal or a full winding signal.