JPS63211347A - Yarn feeder replacing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a device for automatically changing a weft feeder in a shuttleless loom.

Prior Art The invention disclosed in Japanese Patent Application Laid-Open No. 48-67546 has a plurality of yarn supplying bodies installed in an endless yarn feeding stand in a knotted state, that is, in a transfer tail state, and when the weft yarn of a certain yarn supplying body is consumed. , indicates that this state is detected by a sensor and a new yarn feeding body is moved to the yarn feeding position. According to such a device, since the yarn supplying body is automatically replaced, there is no time constraint on the replacement work, and labor can be saved accordingly.

However, in the above-mentioned conventional technology, the winding start end and winding end of the weft yarn must be tied in advance between the yarn supplying bodies, and this operation is relatively complicated. However,
This thread tying operation can be automated by a known mechanical or pneumatic thread tying device. However, such a thread tying device is extremely large-scale and expensive, and cannot be installed in a normal textile factory.

In addition, when a certain yarn supply body is consumed and the weft yarn is then pulled out from a new yarn supply body via the transfer tail, the pull-out tension of the weft increases rapidly, and at that time, yarn breakage of the weft yarn is likely to occur. This also means that stable automation cannot be achieved.

On the other hand, the patent applicant has already proposed a method for supplying the weft yarn of a new yarn feeder in a threaded state using a length measuring and storage device when the yarn breaks during weaving, in the invention of JP-A No. 61-47849. There is. This threading method assumes that the knotted weft thread is positioned on the line of motion of the thread guide tube, and therefore the knotted weft thread is placed in a state where it can be pulled out by the two clampers. Fixed. However, this work is still a time-consuming work in addition to the thread tying work.

In any case, as long as the weft yarn is in a transfer tail state, there is a limit to the improvement of workability due to the necessity of tying the yarn.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to enable continuous exchange of yarn feeders without putting the yarn feeder in a transfer tail state, that is, without tying the ends of the weft threads of each yarn feeder. Furthermore, it is an object of the present invention to automatically guide the weft yarn of a new yarn supplying body from the yarn feeding position to the weft length measuring and storage device ′ not only when the yarn supplying body is replaced but also when the weft yarn breaks.

SUMMARY OF THE INVENTION Therefore, the present invention supports a plurality of yarn feeders in a feedable state by a feeding device, allows them to be guided sequentially to a yarn feeding position, and allows the weft yarn of each yarn feeder to be guided in sequence to a yarn feeding position. is held in place by a clamper, and a new yarn feeder is supplied to the yarn feeding position.The weft yarn is then drawn into the guide tube by the airflow from the suction nozzle and automatically guided to the length measurement storage device. That's what I do.

Structure of the Invention FIGS. 1 and 2 show a yarn supply body changing device 1 of the present invention. This yarn feeder changing device 1 is composed of a feeding device 2 and a weft guiding device 3 as main parts.

The feeding device 2 is for sequentially feeding a plurality of yarn feeding bodies 4 to a yarn feeding position P, and for example, a winding body 5 is assembled. In other words, this winding is body 5
is an endless chain or timing belt, which is wound between a pair of pulleys 6, and is provided with holders 7 on the outer peripheral side at every predetermined pitch. This holder 7 is provided to fit, for example, frictionally with the yarn tube 4a of the yarn supplying body 4 and to hold the yarn supplying body 4 of the weft yarn 8. The pulley 6 on the drive side is driven by a speed reducer 9 with an indexing function and a feed motor 10.

On the other hand, the weft yarns 8 of each yarn supplying body 4 are independent without being tied at adjacent positions, and the ends of each weft yarn 8 are supported by a clamper 11. These clampers 11 are for clamping and supporting the pull-out end of the weft thread 8 between, for example, two washers by the biasing force of a spring.
The yarn supplying body 4 is attached to an endless belt 13 which is wound between the yarn feeding bodies 2 and 2 at a pitch approximately equal to the pinch of the yarn supplying body 4. Note that one of the pair of pulleys 12 is
The rotation of the speed reducer 9 is introduced by a rotation transmitting means (not shown), or a dedicated speed reducer and motor are used so that the winding can be moved by the same amount as the movement of the body 5.

The weft guide device 3 includes a fixed guide tube 14 at the yarn feeding position P. That is, this guide tube 14 is attached to the frame of the loom, etc., and its open end faces near the weft thread 8 guided to the yarn feeding position P, and the other end portion is used to measure the length of the weft thread 8. Storage device 1
5, and is provided with a suction nozzle 16 at its intermediate portion. This suction nozzle 16 is connected to a pressure air source or the like via a control valve 17.

The guide tube 14 is provided with, for example, a pair of photoelectric yarn sensors 18 on the open end side in order to confirm the presence of the weft yarn 8 when it is drawn into the interior.

Note that the length measurement storage device 15 includes a rotating yarn guide 19.
Due to the relative rotational movement between the drum 20 and the drum 20, the weft yarn 8 is stored while measuring the length of one pink, and the control pin 2
By retracting step 1, the weft thread is unwound. and,
This unraveled weft thread is guided to the main nozzle 22,
At the horizontal insertion timing, it is inserted into the vertical unopened 23.

A confirmation sensor 24, a guide member 25, and a cutter 26 are provided near the yarn feeding position P. Note that this cutter 26 is driven by a cylinder 27. In addition, there is a bifurcated guide needle 2 at the tip.
8 is configured to be rotatable about a vertical axis by a rotary cylinder 29. Furthermore, this guide needle 28 is placed on the line of motion of the bifurcated tip of the guide tube 14.
The opening is located so that the

Next, FIG. 3 shows the connection relationship of the control section 30.

This control section 30 is composed of a microcomputer, etc., and has a thread sensor 18, a confirmation sensor 24, a confirmation sensor 24,
It is connected to the operation switch 31 for inputting various commands and the webbing control section 36, and on the output side, the drive circuit 32 of the feed motor 10, the control valve 17, the cylinder 27, and the drive section 33 of the rotary washer cylinder 29. 34 and 35, respectively.

Effect of the Invention In the preparation stage for weaving, the weaver fixes the plurality of yarn feeders 4 to their respective holders 7, holds the ends of the weft yarns 8 in the corresponding clampers 11, and then turns the operation switch. 31 to rotate the feed motor 10 in response to a start command from the control unit 30 and move the first yarn feeding body 4 to the yarn feeding position P.
The weft yarn 8 is removed from the clamper 11 and guided into the guide tube 14, and in this state, the operating switch 31 is operated to open the control valve 17, and the suction nozzle 16 generates a suction air flow inside the guide tube 14. , guides the weft yarn 8 near it to the length measurement storage device 15.

Thereafter, the length measuring storage device 15 pre-winds the weft thread 8 on the drum 20 by the weaving operator's pre-IIf winding operation or by the threading device of Japanese Patent Application No. 196822/1982, and further guides it to the main nozzle 22. It is set so that it can be placed horizontally.

After this, the weaving operation is started by starting the loom.

When the weft yarn 8 of the yarn feeder body 4 at the yarn feeding position P is consumed, weft insertion is no longer performed. Upon detection, the loom is immediately stopped and a start signal is given to the control section 30. Therefore, the control unit 30 rotates the feed motor 10 by a predetermined amount to move the next new yarn feeding body 4 to the yarn feeding position P. At this time, the winding of the bell 1-13 is also synchronized with the body 5 and rotating by the same amount, so the weft yarn 8 is held between the new yarn supplying body 4 and the corresponding clamper 11, and the weft yarn 8 is held between the new yarn supply body 4 and the corresponding clamper 11, Move almost parallel,
The robot moves close to the opening of the guide tube 14 while being guided by a guide member 25 made up of a pair of guide plates. When this state is confirmed by the confirmation sensor 24, the control unit 30 first activates the rotary cylinder 29 to forcibly guide the weft thread 8 to the opening of the guide tube 14 with the guide needle 28, and then 27 to cut the weft thread 8 with the cutter 26 or simultaneously open the control valve 17 to operate the suction nozzle 16;
By generating an air flow in the threading direction inside the guide tube 14, the cutting end of the weft thread 8 is drawn into the guide tube 14 together with the air flow. With the threading device, the length measurement storage device 15 puts the wire in a pre-winding state, guides it into the main nozzle 22, and becomes ready for weft insertion. When this series of operations is completed, the loom receives a threading completion signal from the threading device and is ready to start up again. Note that while the yarn supplying body 4 is being replaced, the m machine is stopped, but this stopping time is relatively short and does not adversely affect the quality of the fabric. In addition, the weaving operation is interrupted every time the yarn feeder 4 is replaced, but the unit length considering the quality of the fabric is shorter than the length woven with one yarn feeder 4, which is a problem. There isn't.

In the embodiment described above, the weft yarn 8 is guided close to the opening of the guide tube 14 by the inner member 25, and is further forcibly guided to the opening by the guide needle 28. Although this is the most preferable example, it is also possible to configure only one of them. That is, the weft thread 8 may be locked with only two guide needles and guided to the opening of the guide tube 14. Also,
The guide member 25 may be provided closer to the opening of the guide tube 14, and may be placed on standby at a position away from the opening of the guide tube 14 when unwinding the weft yarn during weaving.

By the way, during weaving, the weft yarn 8 passes from the yarn supplying body 4 to the guide tube 14.
If the thread breaks before reaching , the thread sensor 18 detects the thread breakage state at that time and sends a signal to the control section 30. Therefore,
The control unit 30 leaves the yarn supplying body 4 in the yarn-broken state in the middle of being consumed and moves the next new yarn supplying body 4 to the yarn feeding position P in the same manner as the replacement operation. During this time, the weaver performs necessary processing on the yarn supplying body 4 in the state of yarn breakage. In this way, since the yarn supplying body 4 is automatically replaced, the weaver is not limited to the timing of replacement, and can proceed with necessary work within a time frame.

Other Embodiments In the above embodiment, the yarn supplying body 4 is supported by the winding body 5, but as shown in FIG. The clamper 11 may also be supported by a stay 38 at this rotary table 37 portion. Further, if the guide tube 14 has a trumpet-shaped opening as shown in FIG.
can also be omitted. Furthermore, in order to ensure suction of the weft yarn 8, the guide tube 14 may be moved forward toward the yarn supplying body 4 when the weft yarn 8 is suctioned.

In addition, the first clamper is a so-called loose clamp,
If the weft yarn 8 is to be separated from the clamper 11 by a strong air flow, the cutter 26 and guide needle 28 as in the previous embodiment are not particularly required.

5 and 6 show the cutter 26 and guide needle 2.
The case where 8 is omitted is shown.

First, in FIG. 5, when the operator holds the weft yarn 8 of the yarn supplying body 4 with the clamper 11, the operator leaves the tip of the weft yarn of a predetermined length hanging down. On the other hand, the opening of the guide tube 14 is provided at a position where it comes into contact with the tip of the weft yarn 8 hanging down from the clamper 11 at the yarn feeding position P. When threading the weft thread 8 through the guide tube 14, the tip of the weft thread 8 is first attracted and guided into the guide tube 14, and then the weft thread 8 is removed from the clamper 11 by the suction force and is further guided into the guide tube 14. .

Next, in FIG. 6, two steps are taken so that the weft yarn 8 is more accurately positioned at the opening of the guide tube 14 at the yarn feeding position P.
The two clampers 11 are fixed in a predetermined position with stays 13a, and the weft thread 8 is hooked and held between the two clampers 11. When the new next yarn feeding body 4 moves to the yarn feeding position P, The weft thread 8, which has been passed over, comes into contact with the opening of the guide tube 14. As the yarn feeding body 4 moves, the tension of the weft yarn 8 increases, and the weft yarn 8 is separated from the two clampers 11 by the time it reaches the yarn feeding position HP. On the other hand, the suction nozzle 1 of the guide tube 14
6 is in operation, the weft thread 8 is released from the clamper 11 and simultaneously guided into the guide tube 14.

Effect of the invention The present invention provides the following unique effects.

First, there is no need to tie the ends of the weft yarn between the plurality of yarn supplying bodies, so labor can be saved by the amount of yarn tying work, and there is no need for a large-scale device for tying the yarn. In addition, as already mentioned, when the yarn feeder is replaced in the conventional so-called transfer tail state, the low tension at the loosened part of the knot increases rapidly to the pull-out resistance, resulting in yarn breakage. is in a state where it is easy to wake up. For this reason, automation cannot be performed stably. In the present invention, after the yarn supplying body is replaced, the weft yarn is not in a transfer tail state and the tension does not increase rapidly during the process of being pulled out, so there is no risk of weft yarn breakage before or after the yarn supplying body is replaced. etc. will be reduced.

At the beginning of replacing the yarn feeder, the weft yarn is drawn into the guide tube by the airflow, so even if the position of the weft yarn is not accurately regulated, it is drawn into the inside of the guide tube from the space on the opening side of the guide tube. Since the air flow ensures that the weft thread is drawn into the interior of the guide tube, precise positioning of the weft thread is not required and malfunctions are reduced.

[Brief explanation of the drawing]

Fig. 1 is a side view of the yarn feeder exchange device, Fig. 2 is a plan view of the device, Fig. 3 is a wiring diagram of the control section, and Figs. 4, 5, and 6 are of other embodiments. FIG. 1. Yarn feeder exchange device, 2. Feeding device, 3. Weft guide device, 4. Yarn feeder, 10. Feeding motor, 11.
・Clamper, 14... Guide tube, 16... Suction nozzle, 3
0...Control unit. Patent applicant Tsudakoma Kogyo Co., Ltd. Representative Patent attorney Kunio Nakagawa (3rd
figure? n

Claims (1)

[Claims] a feeding device that holds a plurality of yarn feeding bodies in a state where they can be fed at predetermined pitches toward a yarn feeding position; and a feeding device that holds an end of the weft yarn of each of the yarn feeding bodies and holds the end of the weft yarn of each of the yarn feeding bodies to a predetermined position as the yarn feeding body moves. A yarn supply body changing device comprising: a plurality of clampers that guide the yarn to a yarn supply position; and a suction nozzle and a guide tube that suck in the weft yarn of the yarn supply body guided to a yarn supply position using an air flow and guide it to a weft storage device. .