JP2000178841A - Yarn ending system in spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an operation stopping time of a spinning unit by detecting a cause of failure in yarn ending action, arriving of a yarn ending truck again while not acting a yarn ending impossible indication means and performing the yarn ending action. SOLUTION: When a yarn ending is generated, a yarn ending truck T arrives and stops at a prescribed position in the spinning unit 3 and simultaneously drawing out a needle thread in a spun side and a bobbin thread in a package 11 side, then a yarn ending is performed by a knotter 17 provided on the truck T. If the yarn ending by the truck T is fallen, when the detection result of the yarn ending impossible cause by a sensor 53 is not the yarn ending impossible cause, an injury signal indicating board 40 indicating the yarn ending impossible means does not act and the truck T arrives the spinning unit 3 again, then performs the yarn ending action while exhibiting a yarn ending demand signal by a yarn ending indication piece 25 from the spinning unit 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a large number of spinning units arranged side by side, and travels along these numerous spinning units to stop at the position of the spinning unit where the yarn breakage has occurred, thereby performing a piecing operation. The present invention relates to a configuration of a piecing system using a piecing cart in a spinning machine having a piecing cart.

[0002]

2. Description of the Related Art Conventionally, in a spinning machine constituted by arranging a large number of spinning units in parallel, a piecing carriage is caused to travel along these many spinning units, and a yarn breakage occurs and When a splicing request signal is detected from a spinning unit that performs a splicing operation, a splicing system configured to stop the splicing cart at the position of the spinning unit and perform a splicing operation is known. In such a piecing system, if the piecing operation fails once, the piecing operation is performed again, and even if the piecing operation is performed a preset number of times (usually two or three times), the piecing operation is still performed. Is not successful, it is determined that the piecing is impossible and the piecing disable display means is operated. The piecing disabled display means may be, for example, lighting a lamp or projecting a display plate. When the splicing disable display means operates in this way, the spinning unit is in an operator waiting state, the spinning operation is interrupted, and after the operator performs a reworking operation, the operation of the splicing disable display means is stopped, and the operation is stopped again. It issues a piecing request signal and waits for the arrival of the piecing cart. Then, when the piecing truck traveling back and forth along the spinning unit arrives at the unit, the piecing operation is performed again.

[0003]

However, in the piecing system as described above, an experiment of the piecing operation was performed. As a result, compared with the probability of piecing failure in the first piecing operation, As the number of times of the piecing operation increases with that of the third time, the probability of piecing failure tends to decrease.
Therefore, if the number of times of piecing that activates the piecing disable display means is set to, for example, two, if both piecing operations fail, the piecing unit determines that piecing is disabled and stops the spinning operation. Becomes As described above, when the spinning unit is stopped after the failure of the two splicing operations, the reworking operation is performed by the operator even if the splicing operation is performed again even though the probability of successful splicing is high. The spinning operation had to be interrupted until the operating time of the spinning machine as a whole decreased.

[0004]

The present invention uses the following means in order to solve the above problems in the piecing system of a spinning machine. That is, in claim 1, a large number of spinning units are arranged side by side, and the vehicle runs along the large number of spinning units, stops at a spinning unit position where a yarn splicing request is issued, and performs a yarn splicing operation. In a spinning machine provided with a piecing cart to perform, when the piecing operation by the piecing truck fails, without operating the piecing disabled display means due to the failure cause of the piecing operation,
The piecing truck is started while the piecing request signal is output from the spinning unit having the piecing request, and the piecing operation is performed again when the traveling piecing truck arrives again at the spinning unit position where the piecing failed. Configured.

According to a second aspect of the present invention, the spinning unit is provided with a detector for detecting a cause of a splicing failure, and when the splicing operation by the splicing cart fails a predetermined number of times, the detector detects the cause. And a piecing failure indication signal indicating that the piecing operation has failed a predetermined number of times, the piecing disable display means is activated.

According to a third aspect of the present invention, the spinning unit is provided with a detector for detecting a cause of a splicing failure, and when the splicing operation by the splicing cart has failed a predetermined number of times, the detector detects the cause. When the cause of the splicing failure is not detected, an additional splicing operation is performed again.

[0007]

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall front view showing a spinning machine equipped with the piecing system of the present invention, FIG.
FIG. 3 is a side view showing a detection mechanism of a piecing bogie for detecting a yarn break display piece and a failure signal display plate of the spinning unit, and FIG. 4 is a view showing a flow of a piecing operation of the present piecing system.

A spinning machine equipped with the piecing system of the present invention will be described. 1 and 2, a large number of spinning units 3, 3,... Are arranged between a motor box 1 and a blower box 2. The spinning unit 3 includes a draft part 7 including a back roller 4, a middle roller 5, and a front roller 6, an air injection nozzle 8, a nip roller 9 for drawing out a spun yarn Y generated by the nozzle 8, a thick yarn portion of the spun yarn. The slab catcher 10 detects a slab (hereinafter, referred to as a slab), and a winding unit 12 that winds the yarn while traversing the yarn on the package 11.

As shown in FIG. 2, the spinning unit 3 is disposed on a frame 13 formed in a substantially U-shape in a side sectional view. Travels back and forth along the rail 16 in the left-right direction in FIG. A suction pipe 18 is provided on the piecing carriage T so as to be rotatable around a rotation shaft 118, and a suction pipe 18 for sucking and grasping the upper yarn on the spinning side and guiding it to the knotter 17 is provided. A suction mouth 19 that is gripped and guided to the notter 17 is provided rotatably about a rotation center 117, and is equipped with a blower 20 that generates a suction air flow. The sliver S supplied to the draft part 7 is drawn from a sliver can provided at the back of the machine base and supplied to the back roller 4. Further, between the front roller 6 of the draft part 7 and the air injection nozzle 8, a sensor for detecting a nozzle clogging of the sliver S, that is, a sensor 53 (for example, a detector for detecting a cause of non-splicing described later) (for example, (A reflection-type photoelectric sensor).

[0010] When the yarn breakage occurs in the spinning unit 3, the yarn splicing cart T is provided in the spinning unit 3 where the yarn breakage has occurred.
At the home position, and the upper yarn on the spinning side and the package 11
Side lower thread and pull out the upper thread and the lower thread from the
After the yarn is spliced by being introduced into the knotter 17 equipped in the above, the piecing carriage T starts traveling toward the next yarn breakage spinning unit 3. As a cause of the yarn breakage, when the sliver is wound around the rollers 4, 5, 6 of the draft part 7 and spinning is impossible, the sliver or impurities in the sliver are clogged in the air injection nozzle 8 and the spinning is performed. There are cases where it is impossible, or cases where the sliver in the sliver can runs out, etc., and such a yarn break is hereinafter referred to as "natural yarn break". Further, when the slab in the spun yarn passes through the slab catcher 10, the yarn may be forcibly cut, and such a yarn break is hereinafter referred to as "a yarn break due to a slab".

A yarn break detecting mechanism 26 for detecting a yarn break indicating piece 25 of the yarn break spinning unit 3 and a detecting mechanism 27 for detecting a natural yarn break spinning unit 3 are provided above the yarn splicing carriage T. And a stop mechanism 28 for stopping at a fixed position of the yarn breakage spinning unit 3 at a lower portion of the piecing carriage T. Further, the package 11 is rotatably mounted on a cradle 76 which is rotatable about a rotation shaft 79, and the package 11 abuts against the friction roller 29 which rotates in a certain direction during normal winding. , And is configured to wind the spun yarn. Each of the mechanisms described above is operated by a large number of cam plate groups 34 fixed to the camshaft 33.

Next, the thread cut detection mechanism will be described with reference to FIG. On the spinning unit 3 side, a slab catcher 10
The thread break indicator piece 25, which detects and operates the thread break, is urged in the counterclockwise direction around the shaft 35 as a fulcrum. It turns and displaces to the chain line position 25a. The yarn break indicator piece 25 displaced is located on the yarn joining cart T side.
Is provided with a dog 36 which engages with the dog. The dog 36 is
The lever 39 provided on the lever 38 supported on the shaft 7 and supported on the shaft 37 integrally with the lever 38 opens the micro switch MS4 when the lever 39 turns. The switch mechanism including the dog 36, the microswitch MS4, and the like is provided with a pair of switches for the left traveling and right traveling of the piecing truck T. Then, when the microswitch MS4 is operated, the traveling piecing truck T is decelerated.

A failure signal display panel 40 for notifying an abnormality when a spontaneous yarn breakage occurs due to a cause other than the slab is provided so that the rotation shaft 4 can be protruded and retracted from a cover 41 on the front surface of the spinning unit 3.
It is supported by 2. That is, the fault signal display board 4
0 is normally attracted and held by the electromagnetic magnet 43, and when a spontaneous yarn break occurs, the electromagnetic magnet 43 is turned off,
The spring 44 turns counterclockwise about the shaft 42 and is positioned at the two-dot chain line position 40a. A plate-like dog 45 that engages with the tip of the displaced two-dot chain line position 40a of the failure signal display plate 40 is pivotally supported by the piecing bogie T by a shaft 46, and is counterclockwise supported by a spring (not shown). It is urged clockwise and is normally positioned and held at a solid line position by a stopper 47.

When the dog 45 engages with the fault signal display plate 40, the dog 45 pivots about the shaft 46, and the dog 45
The other end projecting portion 48 of 5 turns on the micro switch MS3 on the side of the piecing carriage T, and detects the spinning unit 3 in which the natural yarn break has occurred. The lever 49 is a push lever for returning the failure signal display plate 40 to the original position, and is turned around the shaft 51 by the rod 50.

Next, the operation when a yarn break occurs will be described. As described above, the yarn break includes a natural yarn break and a yarn break due to a slab. The splicing cart T passes through the spinning unit 3 having the natural yarn break. The bogie T performs a piecing operation.

The operation in the case of a spontaneous yarn breakage is as follows. While the spun yarn is running, the spun yarn Y passes through the slab catcher 10, and therefore, the slab catcher 10
Detects that there is a spun yarn Y and issues a yarn presence signal, and an electromagnet (not shown) operates to push down the rod 52 in FIG. When a spontaneous yarn break occurs in this state, the yarn presence signal from the slab catcher 10 is stopped,
The rod 52 is pulled upward by the urging force of a spring (not shown) to stop pushing down the rod 52 due to the inoperative state of the electromagnet.
Turns counterclockwise in FIG. Further, as the rod 52 rises, the rotation of the back roller 4 of the draft part 7 is interrupted, the sliver supply is stopped, and the spinning is stopped. At the same time, since the electromagnetic magnet 43 is turned off, the failure signal display plate 40, which has been attracted and held by the electromagnetic magnet 43, is turned counterclockwise around the rotation shaft 42 by the spring 44 to display the failure signal. The tip of the plate 40 protrudes from the cover 41 on the front surface of the spinning unit 3 to notify the operator that the spinning unit 3 is the spinning unit 3 with a natural yarn breakage.

As a result, the thread break display piece 25 and the fault signal display board 40 are respectively positioned at the double dashed line positions 25a and 40a.
In this state, the piecing unit T is connected to the spinning unit 3
, The action pieces of the microswitches MS3 and MS4 are pressed. However, in the case of spontaneous yarn breakage, it is impossible to perform splicing even when the splicing cart T is stopped. The cart T passes without stopping. When the action piece is pressed and the micro switch MS4 is operated, the traveling piecing truck T is configured to decelerate. However, when the micro switch MS3 and the micro switch MS4 are simultaneously activated, the piecing truck T is operated.
The circuit to the stop mechanism 28 is cut off, so that in the case of spontaneous yarn breakage, the piecing bogie T continues to travel at a constant speed.

Next, the operation in the case of yarn breakage due to a slab will be described. When a slab exists in the spun yarn, the slab is detected by a change in the amount of light for detecting the presence of the yarn in the slab catcher 10, and a slab signal is generated. The spun yarn is cut by the slab signal and the spun yarn is cut, and the slab catcher 10 emits a yarn no signal. However, the electromagnetic signal 43 is not disabled by the yarn no signal and the operation is continued. The circuit is electrically configured, and the attracted state of the failure signal display panel 40 by the electromagnetic magnet 43 is maintained, so that the failure signal display panel 40 does not protrude from the cover 41.

Therefore, even if the piecing truck T reaches the spinning unit 3, the dog 45 of the piecing truck T does not come into contact with the failure signal display plate 40, and the microswitch M
S3 is not activated. However, the rod 52 is pulled upward by the slab signal of the slab catcher 10, and the thread break display piece 25 turns counterclockwise to the two-dot chain line position 25a. The thread break display piece 25 abuts on the dog 36, the micro switch MS4 is actuated via the lever 38 and the lever 39, and the splicer T decelerates and stops at a predetermined position of the spinning unit 3 concerned. At the same time, the piecing operation is started.

This piecing operation is performed according to the flow shown in FIG. That is, when the yarn breakage indicating piece 25 of the yarn breakage spinning unit 3 in the step S101 is turned to the two-dot chain line position 25a and issues a piecing request signal, the piecing bogie T is rotated as shown in step S102. It stops against the unit 3 and performs the first piecing operation. Then, after the first piecing operation is completed, a determination is made in step S103 as to whether or not the piecing operation has been successful. If the piecing operation has been successful, the piecing vehicle T starts running and the next It goes to the spinning unit 3 that has issued the splicing request signal. Conversely, if the first piecing operation has failed, the second piecing operation is performed, and after the second piecing operation is completed, whether or not the second piecing operation was successful in step S104. Is determined. When the piecing operation is successful, the piecing carriage T starts running and heads for the spinning unit 3 that has issued the next piecing request signal.

If the second piecing operation has failed, a signal notifying the fact is issued, and it is determined in step S105 whether or not there is a piecing failure cause as a cause of the piecing failure. Done. That is, when the running of the yarn is not detected by the slab catcher 10 after the piecing operation, whether the sliver S is clogged between the front roller 6 and the air injection nozzle 8 is detected by the sensor 53 provided in the spinning unit 3. If the sliver S is not present, the sensor 53 does not detect the cause of the splicing failure, and if the sliver S is present, the nozzle is clogged and the sensor 53 detects the cause of the splicing failure. Judge that it is detected.

If the sliver S is clogged near the inlet of the air injection nozzle 8, the sensor 53 detects the cause of the splicing failure, and if it is determined that the splicing impossibility exists, a detection signal is issued. As described above, when the sensor 53 detects the cause of the splicing failure, the splicing cart T
Since the piecing operation cannot be performed only by the piecing operation, the detection signal from the sensor 53 and a signal indicating that the second piecing operation has failed are output.
As indicated by 107, the failure signal display plate 40, which is the piecing disabled display means, is operated. That is, the electromagnetic magnet 43 is
F, the failure signal display plate 40 is turned counterclockwise to protrude from the cover 41, and the operator is notified that the spinning unit 3 cannot be spliced. Thereafter, the piecing cart T starts running.

On the other hand, if the sensor 53 does not detect the cause of the splicing failure, as shown in step S106, the electromagnetic signal 43 remains on and the fault signal display board 4
0 is sucked and held, and the piecing disabled display means is turned off, and the piecing truck T starts running. Thereafter, when the traveling piecing carriage T reaches the spinning unit 3 in which the piecing operation has failed twice, the yarn breakage indicator piece 25 turns to the two-dot chain line position 25a in the spinning unit 3 and the yarn is cut. Since the splicing request signal has been issued, the piecing carriage T stops at a predetermined position of the spinning unit 3 and performs the piecing operation again. In this example, the determination of the cause of the piecing failure is performed after the piecing operation has failed twice.
The number of failures can be set in advance to an arbitrary number.

As described above, when the piecing operation by the piecing carriage T fails, the cause of the failure in the piecing operation is, for example, when the cause of the failure is not the cause of the piecing failure detected by the sensor 53. In some cases, the splicing carriage T is started without operating the failure signal display plate 40, which is the yarn splicing disable display means, and outputting the splicing request signal by the yarn break display piece 25 from the spinning unit 3 where the yarn break has occurred. Let
When the traveling piecing carriage T arrives again at the spinning unit position 3 where the yarn break has occurred, the piecing operation is performed again. That is, if the cause of the piecing failure is not detected by the sensor 53 and the piecing operation has failed a predetermined number of times, the additional piecing operation is performed again later. When the piecing operation has failed a predetermined number of times, both a detection signal from the sensor 53 that detects the cause of the piecing failure and a piecing failure signal indicating that the piecing operation has failed a predetermined number of times are issued. In addition, the apparatus is configured to operate the failure signal display panel 40 which is the piecing disabled display means.

Thus, even if the piecing operation by the piecing carriage T fails a predetermined number of times, if the piecing operation is further performed, the piecing operation may succeed depending on the cause of the failure. In such a case, the failure signal display panel 40 does not operate, the piecing carriage T stops again, and the piecing operation is performed again, so that the failure signal display panel 40 operates. It is no longer necessary to stop the spinning operation until the operator makes a correction, so that the operation stoppage time of the spinning unit 3 can be reduced, and the operating efficiency of the entire spinning machine can be improved.

In particular, when the cause of the splicing failure is not detected by the sensor 53, the failure signal display plate 40 is not actuated simply because the splicing operation has failed a predetermined number of times. Since the operation is performed, the operation stop time of the spinning unit 3 can be reduced, and the operation efficiency of the entire spinning machine can be improved.

When the piecing operation has failed a predetermined number of times, not only because the piecing operation has failed a predetermined number of times, but also the piecing operation using the piecing carriage T alone is impossible. Since the failure signal display panel 40 is activated only when the cause of the yarn splicing failure is detected by the sensor 53 indicating the state, the failure signal display panel 40 is activated only when the failure signal display panel 40 is to be activated. When the spinning unit 3 is operated and stopped, the spinning unit 3 can be prevented from being stopped unnecessarily, and the operation stoppage time of the spinning unit 3 can be reduced, and the spinning machine as a whole can be stopped. Operation efficiency can be improved.

[0028]

According to the present invention, in the piecing system of a spinning machine, the following effects can be obtained by adopting the above-described configuration. First, in a case where the piecing operation by the piecing cart has failed, the piecing operation is not performed by the piecing unit according to the cause of the piecing operation. The piecing bogie is started with the request signal output, and when the traveling piecing bogie arrives again at the spinning unit position where the piecing has failed, the piecing operation is performed again. Even if the operation is failed by a predetermined number of times, if the piecing operation is further performed and the piecing operation is successful, the piecing disabled display means does not operate, and the piecing bogie stops again. Since the piecing operation is performed again, there is no need to stop the spinning operation until the operator makes a correction as in the case where the piecing disable display means is operated, and the operation stop time of the spinning unit is reduced. Can be reduced, it is possible to improve the operating efficiency of the entire spinning machine.

Further, a detector for detecting the cause of the splicing failure is provided in the spinning unit, and when the splicing operation by the splicing cart fails a predetermined number of times, the detector detects the cause. And a piecing failure signal indicating that the piecing operation has failed a predetermined number of times, the piecing disabled display means is activated. The splicing is impossible only by the operation. The splicing impossible display means is operated only in a state where the splicing impossible display means is to be truly operated, and the spinning unit is stopped. It is possible to prevent the spinning unit from being stopped, and it is possible to shorten the operation stoppage time of the spinning unit and improve the operating efficiency of the entire spinning machine.

Furthermore, a detector for detecting the cause of the splicing failure is provided in the spinning unit, and when the splicing operation by the splicing cart fails a predetermined number of times, the detector detects the cause. When the cause of the piecing failure is not detected, the additional piecing operation is performed again.Therefore, the piecing disabled display means is not actuated simply because the piecing operation has failed a predetermined number of times. Since the additional piecing operation is performed, the operation stoppage time of the spinning unit can be reduced, and the operation efficiency of the entire spinning machine can be improved.

[Brief description of the drawings]

FIG. 1 is an overall front view showing a spinning machine equipped with a piecing system of the present invention.

FIG. 2 is an overall side view of the same.

FIG. 3 is a side view showing a detection mechanism of a piecing bogie for detecting a yarn break display piece and a failure signal display plate of the spinning unit.

FIG. 4 is a diagram showing a flow of a piecing operation of the piecing system.

[Description of Signs] T Yarn splicing cart Y Spun yarn 3 Spinning unit 10 Slab catcher 11 Package 17 Knotter 18 Suction pipe 19 Suction mouse 25 (Issues a splicing request signal) Display means) 53 sensor (detector that detects the cause of splicing failure)

Claims (3)

[Claims] 1. A piecing device which comprises a number of spinning units arranged side by side, runs along the number of spinning units, stops at a spinning unit position where a piecing request is made, and performs a piecing operation. In a spinning machine provided with a bogie, when the piecing operation by the piecing cart fails, the yarn splicing operation is not performed by the piecing unit due to the cause of the piecing operation failure. A spinning machine configured to start the piecing bogie while outputting the splicing request signal, and to perform the piecing operation again when the traveling piecing truck arrives again at the spinning unit position where the piecing has failed. Piecing system. 2. A spin detector for detecting a cause of a splicing failure in the spinning unit, and when a splicing operation by the splicer fails a predetermined number of times, a detection signal from the detector, and 2. The spinning machine according to claim 1, wherein when both of the piecing failure signals indicating that the piecing operation has failed a predetermined number of times are issued, the piecing disable display means is activated. Piecing system. 3. A splicing unit further comprising: a detector for detecting a cause of the splicing failure. When the splicing operation by the splicing cart fails a predetermined number of times, the detector detects the cause of the splicing failure. 3. The splicing system for a spinning machine according to claim 1, wherein an additional splicing operation is performed again when not performed.