JPH03249072A - Yarn ending for double yarn - Google Patents

Abstract

PURPOSE:To prevent toubles in yarn ending to be generated in a two-ply spinning machine by installing yarn detecting sensors in a yarn passage before and after each yarn ending unit, and performing yarn ending action only when all sensors detect yarn before starting the yarn ending action. CONSTITUTION:A yarn ending device for a spinning machine has a first yarn ending unit 1 for ending a first yarn Y, and a second yarn ending unit 2 for ending a second yarn Y, and respective yarn ending units 1, 2 have yarn detecting sensors SE1, SE2, SE3, SE4 in the yarn passage before and after it enters the units 1, 2. The yarn detecting sensors SE1, SE2, SE3, SE4 are connected to a control circuit 4 through an AND circuit 3 respectively, and when a correct yarn connection is not performed based on existence/non- existence of signal to the control circuit 4, a cutter circuit 6 for operating a cutter 5 is actuated, thereby yarn connection is performed only when all sensors SE1-SE4 detect existence of yarn.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a yarn splicing method for splicing aligned yarns for each doubling yarn.

[Prior art 1] Conventionally, a pulling system in which two or more yarns are pulled together is spun by an 11I spinning machine for each yarn.
After being wound up into packages, the required number of threads were pulled out from the packages and interlaced. However, this process requires the creation of single yarn packages, so a two-spindle spinning machine is used as one unit.
So-called 2-bray spinning, which eliminates the doubling process, has come to be performed by winding the two yarns spun in one unit into a package in a aligned state. Even in such two-ply spun pongee, thread splicing must be performed due to thread breakage, etc., but when splicing the two threads while keeping them aligned, it is possible to use the same method as the conventional device, but if the two threads are If you want to splice each piece separately, you will need two splicing devices, and each splicing device will need one splicing device.
You have to join the threads one by one. However, sometimes two threads were guided to one thread splicing device. Therefore, in order to prevent two threads from being introduced into the knock device and tied together, a device was developed that uses a sensor to detect the thread diameter (Japanese Patent Publication No. 48-20457), or
In particular, when splicing yarns with a two-ply pongee spinning machine, a device has been devised to smoothly perform the splicing operation by providing a plurality of sensors (Japanese Patent Publication No. 51-42650). However, conventional yarn splicing devices cannot necessarily solve the problems unique to two-ply spinning machines. In other words, as mentioned earlier, when piecing is performed using one 2-ply spinning machine that combines and winds the system spun from two spinning nozzles installed side by side, two yarns on the sending side and two yarns on the winding side are used. It is desirable to tie the two systems individually. For this reason, the yarn splicing device is guided in a state in which the two waters are separated on the sending side, and the individual systems are guided from the winding side via the separation@buyer. However, there are times when the yarn on the sending side and the system on the winding side are not separated reliably, and in such cases the yarn tying operation must not be performed. [Problem 1 to be Solved by the Invention] In view of the above-mentioned points, the present invention detects in advance the separation state of the yarn introduced into the splicing device, thereby solving problems in splicing that occur in a two-ply spinning machine. The purpose is to prevent [Means for Solving the Problems 1] In a yarn splicing method using a plurality of splicing units corresponding to the number of yarns in order to individually splice each of a plurality of aligned yarns. Yarn detection sensors are installed on the yarn path before and after each yarn splicing unit, and the yarn splicing operation is performed only when all of the sensors detect yarn before starting the yarn splicing operation. K Embodiment] The method of the present invention will be described below along with an example of an apparatus for carrying out the method. The example shown in Fig. 1 shows the splicing device part of a two-brie spinning outfit, and the downstream side of the draft part (not shown), etc.
The yarn splicing unit 1 has a first splicing unit 1 that splices the first yarn Y1, and a second splicing unit 2 that splices the second yarn Y2. Yarn detection sensors SE1. S
F2. SE3. SF3 is provided. Yarn detection sensor SE
I. SF3. SF3. SF3 is an AND circuit 3 (second
If the thread is not tied correctly depending on the presence or absence of a signal to the control circuit 4, it operates the cutter circuit 6 which operates the cutter 5, and operates the re-tying loop 7. A distinction is made between the case where the thread is tied correctly and the case where the correct thread knot is made. The above #lIwJ will be explained based on the M3 diagram. First, a case will be described in which a yarn breakage is discovered and the yarn splicing is completed with one yarn splicing operation. When thread breakage detection sensor SE5 detects thread breakage, it outputs a one-shot pulse, which activates relay RA5.
Switch RAS is turned on to operate knot cam motor M1 and timer relay TR2. The operation of the knot cam motor M1 causes the yarn separation unit of the yarn tying device to operate, and the yarn is introduced into the yarn splicing unit to perform yarn splicing. When this splicing operation is successful and the yarn is introduced into the doubling sensor, the sensor SE1. SF2. SE3. SE4 are all on, and relay lengths Al, RA2. RA3. Activate RA4,
Switch RA1. RA2. RA3. RA4 will be turned on. On the other hand, when the switch RA5 is turned on by the operation of the relay RA5, the knot cam motor M1 is operated. When the knot cam rotates once and one cycle of the yarn splicing operation is completed, sensor SE6 detects this, activates relay RA6, and stops cam motor M1. The operation of the relay RA6 causes the switch RA6-1. RA6-3 is turned on,
RA6-2 is turned off. At the same time as the switch RA5 is turned on, the timer relay TR2 is activated, and the switch TR2 is turned on after a predetermined period of time (at least the time required for splicing) has elapsed since the thread breakage was detected. At this time, switch RA1. RA2. RA3. Since RA4 is on, timer relay TR1 is activated by turning on switch TR2. Timer relay T-R1
It takes a predetermined time to determine whether the yarn splicing is good or not, and then turns on the switch TR1. Relay RA7 is activated. Thereby switch RA7-
1. RA7-2. RA7-3. RA7-4 is activated, but when switch RA7-1 is turned on, switch RA6-
1 and constitutes the self-holding circuit of relay RA7. Further, when the relay switch RA7-2 is turned on, the relay RAS is activated to start the winding drum of the winding device. On the other hand, if the yarn splicing is unsuccessful, the following happens. When thread breakage detection sensor SE5 is activated, relay RA5 is activated, switch RA5 is turned on, relay TR2 is activated, and switch TR2 is turned on, if there is a sensor that does not detect yarn, relays RAI, RA2°RA3. Since any switch of RA4 is not turned on, relay TR1 becomes inactive. To deactivate relay TR1, switch TR1 is turned off.
Relay RA7 becomes inactive, and switches RA7-1. R
A7-2 off, RA7-3. RA7-4 turns on. Further, when switch RA7-2 is turned off, relay RAS for driving the winding drum is inactivated and winding is not performed. Since switch RA7-4 is on and RA6-3 is also on, the solenoid that operates the cutter is activated.
The thread will be cut. Switch RA7-3 is on, and switch RA9 is still on when the first yarn splicing is unsuccessful. Therefore, timer relay TR2 is activated, and at the same time, the knot cam motor is activated, and the yarn is spliced as described above. Perform the connecting motion again. Then, if the yarn detection result by the sensors SEI to SE4 again indicates that the yarn is owned by the prefecture, switch RA7-
2 activates relay RAS, starts the winding drum, and starts winding. If the yarn splicing is unsuccessful after one yarn splicing operation, relay RA7 will be deactivated as described above, so switch RA7
-4 is on and switch RA is activated by relay RA6.
When 6-3 is turned on, the cutter is activated to cut the thread again and re-splice it, and at the same time activates the relay RA9. This relay R
If A9 is configured to issue a knot stop signal after an appropriate number of activations, for example, three times, thread splicing will not be repeated more than necessary. Also, an alarm may be issued at that time. As mentioned above, the signal to tie the thread is issued only when all the signals from sensors 3, 4, and 5.6 are input to the control system, that is, when all four sensors confirm the presence of thread. . If there is one thread due to a guidance error on the sending side, two threads are combined for some reason, or there is a separation error on the winding side, one or more of the four sensors will always be unable to detect the thread. No signal is given to tie the thread. Effects of the K Invention: Yarn tying is performed only when both the yarn feed side and 9 take-up sides are correctly introduced into the yarn tying device, so defective yarn splicing can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the present invention, FIG. 2 is a block diagram showing a control system of the present invention, and FIG. 3 is a control circuit of the present invention using a relay. 1.2... Thread splicing unit. 3.4.5.6---Sensor

Claims (1)

[Claims] 1. In a splicing method that uses a plurality of splicing units corresponding to the number of threads to individually splice each of the aligned threads, the A yarn splicing method characterized in that a yarn detection sensor is attached on a yarn path, and the yarn splicing operation is performed only when all of the sensors detect yarn before starting the yarn splicing operation.