JP2871318B2 - How to judge the necessity of thread replacement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically determining the necessity of replacing a creel with a creel when automating the change of the yarn feed to a creel of a draw false twisting machine or the like. More particularly, the present invention relates to a method for determining whether or not a yarn feed replacement is necessary even when a half yarn feed is supplied in combination with a full yarn feed.

[0002]

2. Description of the Related Art First, the equipment configuration of a draw false twisting machine will be described. In FIG. 5, a yarn 52 fed from a yarn supply 51 in a creel 50 is held at a yarn tension that can be drawn by a first feed roller 53 and a second feed roller 54. On the downstream side between the two sets of feed rollers 53 and 54, a false twisting device 55 is provided.
The yarn 52 upstream of 5 is twisted. Also, on the upstream side between these two sets of feed rollers 53 and 54,
A primary heater 56 for heat setting is provided, and the twisted yarn 5
2 is heated to the stretching temperature. Further, a third feed roller 57 is provided downstream of the second feed roller 54, and a secondary heater 58 is provided between these two sets of feed rollers 54, 57, and re-heat treatment is performed if necessary. The yarn 52 after the reheat treatment is finished to a full ball 60 by a take-up winder 59. In the above-described drawing false twisting machine, the primary heater 56 is separately arranged and opposed to the main body 61 after the false twisting device 55, and a passage 62 is provided therebetween so that the doffing device 63 can travel. Further, a peg circulation conveyor 64 is arranged around the primary heater 56. Doffing device 6
Numeral 3 is for transferring the full ball 60 in the main body 61 to the peg 65, holding the full ball 60 in the bobbin portion, picking up the full ball 60 from the take-up winder, turning the package by 90 °, and opposing the peg 65. To peg 65
Has a function to push out the full balls 60 toward the, and attach an empty bobbin to thread.

In the above-described draw false twisting machine, automation has been promoted in order to meet demands for cost reduction by labor saving, centralized management by a computer, protection of a package surface, and the like. For this reason, in addition to the above-described automation of unloading the processed full balls 60 by a combination of the doffing device 63 and the peg circulation conveyor 64, it is possible to automate the exchange of the yarn supply 51 to the creel 50 using the yarn supply exchange device. It has become required.

[0006] Therefore, it has been proposed to use a yarn feed exchange device 1 as shown in FIG. Creel 5 shown
0 indicates that the unwinding is switched to one yarn supply 46 of the pair of yarns and the other yarn supply is an empty bobbin 7. In this state, an empty bobbin 7 and a new yarn supply 8 may be replaced. Then, the peg 40 is turned in the direction, and the empty bobbin 7 is extracted. Next, the chuck hand 20 rotates in the direction, and the yarn supply 8 is inserted into the peg 40.
Next, simultaneously with turning the peg 40 in the direction, the chuck hand 20 turns in the direction. Then, the tail 48 of the yarn supply 46 being unwound is connected to the yarn supply 8. The tail 48 of the unwound yarn supply 46 is connected to the spare yarn supply 8, and is switched to the spare yarn supply 8 when the unwound yarn supply 46 becomes empty. Therefore, it is necessary to insert a new yarn supply at the yarn supply 46 after the switching. In order to determine the timing of the yarn feed exchange, it is necessary that the yarn feed exchange device 1 confirms the state of the yarn feeding of the creel 50 and can determine the timing of the necessity of the yarn feed exchange.

Next, a device for judging the necessity of yarn feed replacement will be described with reference to FIGS. 7 and 8. FIG. In FIG. 7, the yarn feeder exchange device 1 is arranged to reciprocate along a row of creels 50. This yarn feeder exchange device 1 is provided with sensors 2 and 3 such as photoelectric sensors which are vertically separated by a predetermined distance at a predetermined height. Since the yarn feeder exchange device 1 can travel freely, after measuring the right peg 40 and then traveling the distance L1, the left peg 41 can be measured. Also, since the creels 50 generally have multiple stages, sets of sensors 2 and 3 are installed in upper and lower stages. Next, the creel 50 includes each peg 40
Mirrors 4 to 6 are attached at positions on the back side crossing through 45. Mirror 4 is for pegs 40 and 45 and mirror 5
Is for pegs 41 and 42 and mirror 6 is for pegs 43 and 44
It is for.

[0008] In FIG. 8, it is assumed that an empty bobbin 7 is inserted into a right peg 40 and a full yarn supply 8 is inserted into a left peg 41. The sensor 2 is located at a position where the height from the center of the pegs 40 and 41 is H1, and measures a little inside the outer diameter of the yarn supply 8 that is just full. The sensor 3 is located at a position H2 from the center of the pegs 40 and 41, and measures just above the outer diameter of the empty bobbin.
That is, if both the sensors 2 and 3 are ON-ON, it can be determined that the ball is full or almost full, and both the sensors 2 and 3 are O
If it is FF-OFF, it can be determined that it is a small ball or the sky.
Is OFF and the sensor 3 is ON, it can be determined that it is an intermediate half ball.

FIG. 9 shows combinations of criteria. If it is a combination of full balls and half balls like numbers 1 and 4, it is unnecessary to replace it. If it is a combination of full balls and small balls like numbers 2 and 5, it will soon be necessary to replace it. If it is a combination of a half ball and the sky as in 6, the replacement is necessary. Then, the peg to be replaced is specified depending on whether the left or right is empty. There are various operations of the yarn feeder changing device 1 based on this determination. For example, when it is determined that the yarn feeder needs to be changed, the yarn feeder changing device 1 starts the changing operation. When it is determined that replacement is not necessary or that replacement is needed soon, the yarn feeding replacement device 1 that reciprocates along the creel is bypass-traveled, and the necessity of replacement is determined again. In addition, the yarn feeding replacement device 1 can rotate the creel 50 every 120 °, and can also determine whether or not a pair of backside replacements is necessary.

[0008]

As a premise of the above-described yarn feeding replacement method, it is necessary that creels be supplied with full balls of a predetermined diameter. However, a half ball may be generated when the type is switched, and there is a demand to supply the half ball to the creel at the next type switching and to use up the creel. In this case, in the determination method of FIG. 9, for example, if there is a half ball displayed in parentheses on the left side of the number 2, even if the right side is a small ball with OFF-OFF and a yarn layer remaining, the state of the number 3 is displayed. Thus, there is a problem that it is determined that replacement is necessary, and the small balls being unwound are replaced.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a creel in which half balls are supplied to a creel mixed with full balls having a predetermined diameter. Even in this case, it is an object of the present invention to provide a creel yarn feed replacement necessity determination method capable of automatically determining the necessity of yarn supply.

[0010]

In order to achieve the above-mentioned object, a method for determining the necessity of yarn supply replacement of a creel according to the present invention detects a state of a yarn layer of a pair of left and right yarns unwound alternately. In the method of determining necessity of yarn supply replacement, the state of the yarn layer is detected for both yarns, and the yarn layer of one yarn supply is equal to or less than small balls and the other yarn supply is equal to or greater than half balls. Check the status of
If you do, Kodama will be empty after detecting that condition
After a predetermined period of time has elapsed ,
In this method, when the state of the yarn layer is detected, the yarn layer of the other yarn supply detects the state of a half ball, and it is determined that the one yarn supply needs to be replaced.

[0011]

When a predetermined time has elapsed since the state of the yarn layer at the upper and lower points of one yarn supply (the small ball) is detected, even if the yarn layer remains and the small ball is being unwound, It becomes empty after a lapse of a predetermined time. Then, it is determined that replacement is necessary based on the state of the yarn layer at the upper and lower points of one of the yarn supply (empty) and the state of the yarn layer at the upper point of the other yarn supply that there is no yarn layer (half ball).

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a top view of a device to which the method of the present invention is applied,
FIG. 2 is a side view of FIG. 1, FIG. 3 is a diagram showing the progress up to a replacement determination in the case of half ball yarn feeding, and FIG. 4 is a diagram showing the progress up to the replacement determination in the case of full ball yarn feeding. is there.

In FIG. 1 and FIG. 2, the creel is a six-stage fixed creel 11, and the yarn changing device 1 reciprocates along the creel 11 to judge whether or not to change the yarn and to change the yarn. . As clearly shown in FIG. 2, the yarn feeder exchange device 1 has a number of sensors 2 corresponding to the number of stages of the creel 11.
The three sets are arranged vertically, and the state of the six-stage yarn supply can be detected at a time. Further, as clearly shown in FIG. 1, each unit 11a, 11b,
11c... Can be sequentially detected on the L (left) side and the R (right) side.

In FIG. 1, the detection signals of the sensors 2 and 3 are processed by the controller 12, and the yarn feed exchange mechanism 13 and the traveling mechanism 14 are operated. Steps # 1 to # 5 of the controller 12 determine the necessity of yarn feed replacement. In step # 1, one side of a pair of yarns in the units 11a, 11b, 11c...
When the other side in FF and the state of OFF) detects the Mitsurudama or apprentice entertainer (state of the sensors 2 and 3 are ON and ON or OFF and O N), to operate the timer in step # 2, Step ♯
A predetermined time elapses until the time-up of 3. Steps # 2 and # 3 are performed in units 11a, 11b, 11c,.
For each of the 1st to 6th stages, OFF or
Done while retaining the data down bets or in a time-up, the time-up is switched to OFF by the yarn feed exchanger. Apart from the updating of the time table, the yarn feeder 1 runs immediately after the detection of step # 1 unless the replacement operation is performed, and the sensors 2 and 3 inspect the next unit. Then, one is empty the other side apprentice entertainer (<br/> state of the sensor 2, 3 OFF and O N in (sensors 2 and 3 are turned OFF and OFF) condition of the time-up and step ♯4 step ♯3 ) Is determined based on the AND of the conditions that have been detected.

Next, the determination procedure when a half ball is supplied will be described in detail with reference to FIG. In the state
It is assumed that the left (L) side is unwinding and the right (R) side is a spare half ball. In this state, the sensors 2 and 3 are OFF and ON on the L side and the R side, and are determined as half balls and half balls.
With the timer kept off, the yarn feeder runs by-passing. In this state, when the L side is OFF and OFF, at least the small balls are unwound, and when this state is detected, a timer corresponding to the pair of yarn feeds is started, and the yarn feed exchange device travels by bypass. . In this state, even if the yarn feeder exchange cart inspects the same pair of yarns again, if the timer is counting, even if the L side is OFF and OFF and the R side is OFF and ON, a combination of small balls and half balls is possible. And run by bypassing the yarn feed exchange device. In the state, the yarn changing carriage inspects the same pair of yarns again, and the timer has expired.
When the side is OFF and OFF and the R side is OFF and ON, it is a combination of the sky and the half ball, and the replacement work is started. By weighting the condition that the predetermined time has elapsed by the timer in this way, even if the sensors 2 and 3 detect the same state and state, the inconvenience of exchanging small balls during unwinding of the state is eliminated. By the way, the time setting by the timer is
The time may be set to be equal to or longer than the time when the largest yarn layer determined by the sensors 2 and 3 as a small ball is unwound and becomes empty.

Further, a determination procedure when a full ball is supplied will be described with reference to FIG. In the state, the timer is OFF for the combination of the half ball and the full ball, and the yarn feeding exchange device runs by bypass. In the state, L side is OFF
And OFF, at least the small ball is unwound and the timer is started. No exchange is performed during the counting of the state, and even if the time of the state is up, the exchange is not performed as long as the R side is full of ON and ON. Then, in this state, when the timer has expired and the L side is OFF and OFF and the R side is OFF and ON, it is a combination of empty and half balls, and the replacement operation is started. As described above, even when a normal full ball is supplied, the existence of the timer does not hinder.

In the above description, the yarn feed exchange in the draw false twisting machine has been described. However, the present invention can be applied to an automatic yarn feeding system of an air processing machine. In addition, the creel is not limited to the rotary type, but may be a fixed creel device as long as the creel has a pair of left and right pegs into which the unwound yarn and the spare yarn are inserted. .

[0018]

According to the method of the present invention, it is possible to detect the state of the yarn layer of one of the yarns after a predetermined time has passed since the state of the yarn layer of the other yarn was detected. It is a method of determining whether or not it is necessary to replace the one yarn supply. Even if the yarn layer remains and is a small ball being unwound, it becomes empty after a predetermined time elapses. It can be determined that replacement is necessary based on the yarn layer state (empty) of no yarn at the upper and lower points of the yarn supply and the yarn layer state (half ball) of no yarn layer at the upper point of the other yarn supply. Even if a half ball is supplied while being mixed with a full ball, the small ball is not accidentally replaced, and the effective use of the half ball can be automatically performed.

[Brief description of the drawings]

FIG. 1 is a top view of a device to which the method of the present invention is applied.

FIG. 2 is a side view of FIG.

FIG. 3 is a diagram showing a process up to a replacement determination in the case of half ball yarn feeding.

FIG. 4 is a diagram showing the progress up to the exchange determination in the case of full yarn supply.

FIG. 5 is a side view showing a device arrangement and a creel of a draw false twisting machine.

FIG. 6 is a top view showing a yarn supply exchange state of the yarn exchange device.

FIG. 7 is a top view showing an operation state of a sensor of the yarn supply changing device.

FIG. 8 is a side view showing an operation state of a sensor of the yarn supply changing device.

FIG. 9 is a diagram showing an example of a combination of determination contents of a conventional yarn feed replacement necessity determination method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Yarn changer 2, 3 sensor 11 Creel 15 Time table 40-45 peg 46 Yarn supply during unwinding 47 Spare yarn supply

Claims (1)

(57) [Claims] 1. A unwound state detected determines yarn supplying replacement necessity determination method the necessity of feeding yarn exchange of the pair of left and right yarn feed yarn layer are alternately thread layer for both the yarn feeding The state
Detected, the yarn layer of one yarn supply is smaller than small balls and the other yarn supply is half
When detecting the state of more than the ball, whether to detect the state
After a predetermined time equal to or longer than the time when Kodama is empty ,
A creel yarn feeder characterized in that when the state of the yarn layer is detected for both yarns, the yarn layer of the other yarn yarn detects the half-ball state and determines that the one yarn supply needs to be replaced. Replacement necessity determination method.