JP3031092B2 - How to replace yarn feed - 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 changing a yarn feed of a false twisting machine using a yarn change robot reciprocating along a creel stand. The present invention relates to a yarn feed replacement method capable of making a determination and performing a quick yarn feed change.

[0002]

2. Description of the Related Art A false twisting machine such as a draw false twisting machine is used to perform false twisting on a filament yarn. The false twisting machine is provided with a weight for false twisting the yarn and a creel stand for supplying the filament yarn to the weight via a heating unit. A large number of weights are arranged in a row. A yarn supply package for each weight is mounted on the creel stand in a multi-tiered manner. Usually, the yarn supply package is used as a pair of two yarns per one weight. A yarn supply station is provided facing one end of the row of creel stands, and a yarn supply exchange robot that moves along the creel stand starting from the yarn supply station is provided.

[0003] The yarn feed changing robot has a remaining yarn check function for determining whether or not the yarn feed needs to be changed for each spindle, and a yarn feed changing function for changing the yarn feed. The remaining yarn check is performed by a photoelectric sensor mounted on the yarn supply exchange robot. The photoelectric sensor is provided for each stage so that all stages can be checked while the yarn feeding exchange robot is moving. The photoelectric sensor is
It is provided at a predetermined position of each stage so that it can be detected whether or not a yarn is present at a predetermined position of the yarn supply package. On the other hand, the yarn supply exchange is performed by providing an exchange unit which can move up and down between the stages in the yarn supply exchange robot, and moving the exchange unit to a desired stage.

[0004] The yarn supply exchange robot has one new yarn supply package taken in from the yarn supply station, and runs along the creel stand while checking each yarn supply package during yarn supply while checking the remaining yarn. I have. 2 of that weight
If even one of the yarn supply packages is empty,
Therefore, it stops immediately and exchange is started. Then, the process returns to the yarn supplying station, where the empty paper tube is discarded and a new yarn supplying package is taken. In this way, the yarn supply package in the creel stand is replaced with a new one at any time.

[0005]

However, the above-described conventional yarn feeding replacement method has two problems that hinder the efficiency of the false twisting machine.

First, the time required for checking the remaining yarn and replacing the yarn supply is long. The reasons are that the moving speed of the yarn feeding exchange robot cannot be increased, and that time is required for moving the exchange section to a desired stage.

The reason why the moving speed of the yarn feeding exchange robot cannot be increased is that if the moving speed is high, the points viewed by the photoelectric sensor vary, and the remaining yarn cannot be checked accurately. Therefore, the moving speed during the remaining yarn check cannot be increased.

The time required to move the exchange unit to a desired stage is necessary because it is not known in advance at which stage the yarn exchange should be performed. This is because you have to move to the step.

[0009] The second problem is that the discovery of the weight that requires the yarn feed exchange is biased toward the side closer to the yarn feed supply station. Every time the yarn feed exchange of one spindle is executed, the yarn exchange robot returns to the yarn supply station, and the remaining yarn check is started from there. Therefore, the yarn exchange robot moves to the weight far from the yarn supply station. There are fewer opportunities to come.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a yarn feed replacement method capable of determining whether or not yarn feed needs to be changed evenly with all spindles and performing quick yarn feed change.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention determines whether or not it is necessary to change the yarn feed of each weight of a false twisting machine, and drives a yarn changing robot for changing the yarn feed. After the necessity of yarn replacement is determined for all the weights, the robot is reciprocated between the yarn supply station and the weight that needs to be changed to change the yarn supply.

[0012]

With the above arrangement, in the step in which the yarn changing robot determines whether or not to change the yarn feeding over the entire weight, the moving speed is not increased, but the time required to return to the yarn supplying station is saved. Then, regardless of the distance from the yarn feeding supply station, it is determined fairly whether or not all yarns need to be replaced.

Next, in the yarn feed replacement step, there is no need to perform detection positioning of the photoelectric sensor which restricts the moving speed, so that the moving speed can be increased. Therefore, the time for yarn supply exchange is reduced. Also, since the weight required for replacement is stored, it is known in advance at which stage the yarn feed replacement should be performed. The changer can be moved to that stage before the yarn change robot stops (ie, while moving from the yarn supply station). Therefore, there is no time loss due to the movement time of the exchange unit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 2, the false twisting machine equipment includes a false twisting machine 1, a heating unit 2, a creel stand 3, a transport line 4,
A yarn supply station 5 and a yarn exchange robot 6 are provided. The false twisting machine 1 is provided with an automatic doffer 62 for doffing.

In the false twisting machine 1, as shown in FIG. 4, the weight 41 mainly comprises a twister 42 for twisting the yarn, and a large number of weights are arranged in a row in the longitudinal direction of the false twisting machine 1. They are arranged side by side. In addition, a winder 43 for winding the yarn
Are arranged below the weight 41 in a multi-stage row. Weight 41
The heating unit 2 is provided extending substantially obliquely upward from the weight 41 along the row. A roller 44 is provided at the base end of the heating unit 2. The filament yarn from the creel stand 3 passes from the roller 44 through the heating section 2 to the weight 4
Sent to one.

The creel stand 3 is formed by arranging a plurality of holders 46 of the yarn supply package 45 along a row of the weights 41 in order to hold a yarn supply package 45 made of filament yarn. As shown in FIG. 5, two yarn supply packages 45 for each weight 41 are held at the same height, two in each row of the nearest row, and arranged side by side along the longitudinal direction of the creel stand 3. You. That is, one weight 41
There will be two yarn supply packages per hit. The yarn ends of the two yarn supply packages 45 are tied. When one of the yarn supply packages 45 becomes empty, the yarn is fed from the next yarn supply package 45. As described above, the yarn supply package 45 is used in pairs for one weight.

As shown in FIG. 2, in a false twisting machine having two rows of weights 41 and two rows of creel stands 3, both rows of weights 41 are provided back to back on the false twisting machine 1, and 10 rows are provided on one side of each row.
Eight weights are arranged. On the other hand, the creel stand 3 is provided on both sides of the false twisting machine 1, and a column on one side of the creel stand 3 is constituted by 36 rows, with the upper and lower six stages as one row.

A yarn supply station 5 is provided at one end of the row of the creel stands 3. The yarn supply station 5 is provided facing the transport line 4 that sequentially transports the yarn supply packages, and a package transfer device 61 that appropriately receives the yarn supply packages from the ceiling transport device 60 on the transport line 4 is provided. Yarn supply station 5
Has a yarn supply package at all times. Starting from the yarn supply station 5 in contact with the yarn supply station 5, the yarn exchange robot 6 moves along the creel stand 3.
The moving area 7 is set. At the starting point 8 of the moving area 7, an empty paper tube housing box 9 is provided.

As shown in FIG. 3, the yarn feeding exchange robot 6 which determines whether or not the yarn feeding of each weight 41 needs to be exchanged and has a movable truck 64 having wheels 31 as shown in FIG. It can be reciprocated on a rail 63 provided in the area 7. The yarn supply exchange robot 6 includes a photoelectric sensor 32 for detecting the remaining yarn of the yarn supply package 45, an exchange unit 33 for mainly exchanging the yarn supply package 45, and a storage device (not shown).

Two photoelectric sensors 32 are provided for one stage of the creel stand 3. Its height position is shown in FIG. That is, the photoelectric sensor 32 includes the outer remaining yarn sensor 51 and the inner remaining yarn sensor 52, and draws trajectories 54 and 55 as the yarn supplying exchange robot 6 moves. The outer remaining yarn sensor 51 is provided at a position for detecting the reflection when the yarn supply package 45 is full. The inner residual yarn sensor 52 is provided at a position where the reflection is detected when the yarn supply package 45 is a half ball and is not detected when there is almost no residual yarn. When the yarn supplying exchange robot 6 sequentially passes in front of the two yarn supplying packages 45 of the respective weights, the detection of the outer residual yarn sensor 51 and the inner residual yarn sensor 52 is performed.
Four bits of information can be obtained for each spindle. The yarn feed exchange robot 6 detects a state in which there is almost no remaining yarn in one of the yarn supply packages 45 based on the 4-bit information, and determines that yarn feed exchange is necessary when this state is reached.

As shown in FIG. 3, the exchange section 33 is provided on a side face of the yarn exchange robot 6 in the running direction.
An elevating mechanism 34 for elevating and lowering to each position of the creel stand 3, an exchange mechanism 35 for exchanging the yarn supply package,
The rotation mechanism 73 has a rotation mechanism 73 that rotates the exchange mechanism 35 from the position shown in the figure and inserts it into the creel stand 3. The elevating mechanism 34 includes a support 70 having a height substantially equal to that of the creel stand 3.
, A sprocket 65 provided above and below, a chain 66 stretched between the sprockets 65, and a sprocket motor 67. A work table 68 that is raised and lowered alternately with the exchange unit 33 is attached to the lifting mechanism 34 via a support member 69. The exchange mechanism 35 includes a paper core extracting mechanism 71, a yarn feeder / transfer device 72 equipped with the full package 45, and a cam mechanism 7.
4. Peg open mechanism 75 and the like.

A projection 36 for positioning each row is provided on the upper part of the creel stand 3. The yarn feeding exchange robot 6 is provided with a limit switch 37 which is opened and closed by the projection 36. I have.

FIG. 6 shows the creel stand 3 and the yarn feeding exchange robot 6 as viewed from above. Creel stand 3
Each of the weights is provided with two yarn supply packages 45, and the yarn supply exchange robot 6 operates the yarn supply package 4 having no remaining yarn.
It stops at the position of 5a. The replacement section 33 can replace the yarn supply package 45a with the full package 45.

Next, the operation of the yarn supplying robot 6 will be described with reference to FIG.
Will be described along the flowchart of FIG. First, the necessity determination routine S
In step 1, the starting point 8 of the movement of the yarn supply exchange robot 6 is set as the yarn supply supply station 5, and the yarn is exchanged on the moving area 7 at a low speed (S11). This speed is such a speed that the photoelectric sensor 32 can determine whether or not the yarn feed replacement is necessary at the correct position. When the protrusion 36 opens and closes the limit switch 37 during the movement, the remaining thread check using the photoelectric sensor 32 is performed at each stage of each row (S12). The necessity of yarn feed replacement is 2
One of the yarn supply packages 45 is transmitted through both the outer residual yarn sensor 51 and the inner residual yarn sensor 52, and
When the outer residual yarn sensor 51 has passed through the individual yarn supply packages 45, the weight is determined to be a weight that needs to be replaced. That is, if there is at least one yarn supply package 45 having no remaining yarn, it is determined that the weight needs to be replaced. If the weight is a weight that needs to be replaced, the row number and the row number are stored (S13). In this way, the yarn changing robot 6 moves to the end point side of the creel stand 3 (S14). At this point, the necessity of yarn feed replacement is determined for all the weights, and all the weights requiring replacement are stored. The yarn feed changing robot 6 starts at a high speed 8
Return to (S15). Next, it is checked whether there is at least one weight that needs to be replaced (S16). If there is no weight that needs to be replaced, the necessity determination routine S1 is repeated. If there is at least one weight that needs to be replaced, the process proceeds to the yarn supply replacement routine S2.

Next, in the yarn feed replacement routine S2, one storage of the weight required for replacement is read out (S21). The yarn supply exchange robot 6 holds one exchange yarn supply package 45 and moves toward the line (S22). The moving speed at this time is a sufficiently high speed. At the same time, the exchange unit 33
Is moved up and down to the position of the step (S23). When the yarn feeding exchange robot 6 stops by positioning the line (S2
4), the exchange unit 33 has also arrived at the position of the corresponding stage. Then, the rotation mechanism rotates the exchange mechanism 35 into the creel stand 3, and the exchange mechanism 35 removes the empty paper tube from the holder 46 of the creel stand 3 and mounts a new yarn supply package 45 (S25). Yarn exchange robot 6
Returns to the starting point 8, drops the empty paper tube into the empty paper tube accommodation box 9, and takes in the yarn supply package from the yarn supply supply station 5 (S26). If there is another weight that needs to be replaced in the storage device, the above operation is repeated. In this way, the yarn supply exchange robot 6 is reciprocated between the yarn supply supply station 5 and the exchange-required weight to exchange the yarn.

As a result of performing the above-described steps (routines) S1 and S2, in the necessity determination routine S1, the traveling speed cannot be increased in the going movement, but the time required to return to the starting point 8 is saved. Then, regardless of the distance from the yarn feeding supply station, it is determined fairly whether or not all yarns need to be replaced.

Next, in the yarn feed replacement routine S2, there is no need to perform detection positioning of the photoelectric sensor that restricts the moving speed, so that the moving speed can be increased. Therefore, the time for yarn supply exchange is reduced. Also, since the weight required for replacement is stored, it is known in advance at which stage the yarn feed replacement should be performed. Before the yarn changing robot 6 stops (ie,
Change section 3 (while moving from yarn supply station)
3 can move to that level. Therefore, the exchange unit 3
The time loss due to the moving time of No. 3 is eliminated.

It should be noted that the creel stand 3 may be provided with only one yarn supply package.

[0030]

The present invention exhibits the following excellent effects.

(1) Since the necessity of yarn feed replacement can be determined fairly for all weights, the moving efficiency does not decrease even with weights far from the yarn feed supply station.

(2) Since the yarn feed can be changed quickly, the weight does not stop waiting for the yarn feed to be changed, and the moving efficiency does not decrease.

[Brief description of the drawings]

FIG. 1 is a flowchart of a yarn feeding replacement method of the present invention.

FIG. 2 is a plan view of a false twisting machine using the yarn feeding replacement method of the present invention.

FIG. 3 is a side view of the yarn feeding exchange robot.

FIG. 4 is a detailed side view of the false twister of FIG. 2;

FIG. 5 is a partially enlarged view of a creel stand for explaining a method of determining necessity of yarn supply exchange.

FIG. 6 is a plan view of a creel stand and a yarn feeding exchange robot.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 False twisting machine 3 Creel stand 5 Yarn supply station 6 Yarn exchange robot 41 Weight S1 Necessity determination routine S2 Yarn exchange routine

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Claims (1)

(57) [Claims] 1. A yarn feeding exchange robot that determines whether or not yarn replacement is necessary for each weight of a false twisting machine and changes yarn supply is performed, and determines whether or not yarn replacement is necessary over all weights while running. And then changing the yarn supply by reciprocating the robot between the yarn supply station and the weight requiring replacement.