JPH059838A - Weaving in jet loom - Google Patents

Abstract

PURPOSE:To provide a method for weaving, capable of shortening the downtime caused by abnormality of weft yarns in the weft-inserting channel part of a jet loom. CONSTITUTION:A method for weaving where, in case of outbreak of abnormality in a channel of any one set among plural sets mentioned bellow in a jet loom equipped with the plural sets composed of a yarn-feeding package, a retaining drum and a weft-inserting channel of the main nozzle corresponding to one kind of a weft yarn, weft inserting is carried out by using only normally operating weft-inserting channels except the channel in which the abnormality is observed.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a weaving method in a jet loom. More specifically, the present invention relates to a weaving method in a jet loom capable of shortening a stop time due to an abnormality in a yarn feeding package, a storage drum, and a weft insertion channel portion of a main nozzle.

[0002]

2. Description of the Related Art Conventionally, as a technique for improving the operating rate in a jet loom, when the jet loom is stopped due to an abnormality during the flight of the weft, the abnormal weft is automatically removed and the weft insertion is automatically performed again. An automatic device called an automatic weft repair restart device has been developed.

In a jet loom equipped with this device, when the jet loom is stopped due to a specific weft flying abnormality, for example, a weft tip tangle, a broken knot, or a blowout that occurs when the weft is inserted into the warp shed. For example, when the jet loom stops due to the weft not flying the width of the fabric, it is possible to automatically remove the abnormal weft and restart the jet loom without leaving scratches on the fabric. Becomes

Therefore, in comparison with the case where a worker such as a maintenance worker or a weaver has conventionally taken out an abnormal weft and made an adjustment, and restarted, the worker finds the stopped jet loom, There is no waiting time to get there. By shortening the jet loom stoppage time during this period, the jet loom operating rate can be improved, and since it is not necessary to bother the operator, it is also useful for labor saving.

However, the above-mentioned automatic device is capable of exerting its function only for an abnormality after the weft has passed through the main nozzle. For example, as the speed of the jet loom increases, the number of unwounds on the yarn supply package increases, and the weft yarn is cut between the yarn supply package and the storage drum or between the storage drum and the main nozzle. The occurrence of abnormalities such as entanglement is increasing, and further, when the weft thread comes out of the main nozzle, it does not function.

That is, the trouble of the weft yarn which has occurred on the way from the yarn supplying package to the main nozzle cannot be completely dealt with by the above-mentioned automatic device, and a worker such as a maintenance worker or a weaver who visits the factory arrives. The jet loom had to be stopped until the yarn was properly threaded from the yarn supply package to the main nozzle.

[0007]

SUMMARY OF THE INVENTION According to the present invention, even if weft insertion abnormality occurs in one set of the yarn feeding package, the storage drum, and the weft insertion channel portion of the main nozzle during the operation of the jet loom, the wefts of other sets are not used. By changing the weft insertion condition of the input channel or by starting the alternative operation of the channel that caused the abnormality, the stop time of the jet room can be shortened, or continuous operation can be performed without stopping the jet room. An object of the present invention is to provide a jet loom weaving method that improves the jet loom operating rate and is also useful for labor saving.

[0008]

SUMMARY OF THE INVENTION That is, according to the present invention, in a jet loom provided with a plurality of sets of a weft supply package, a storage drum, and a weft insertion channel of a main nozzle for one type of weft, the wefts of the plurality of sets are set. If an error occurs in any one of the weft inserting channels, change the weft inserting conditions of the remaining weft inserting channels excluding the weft inserting channel in which the error has occurred and continue weft inserting only in the remaining weft inserting channels. A weaving method in a jet loom, which is characterized in that

The present invention will be described in detail below. The storage drum used in the present invention has a function of measuring and storing the weft yarn unwound from the yarn supply package by the width of the fabric. Further, the main nozzle means a nozzle having a function of causing the weft yarn stored in the storage drum to fly into the warp opening. The sub-nozzle means a plurality of sub-nozzles attached at intervals of several centimeters, and jetting compressed air to cause the weft yarn blown into the warp opening by the force of the compressed air by the main nozzle to fly over the width of the fabric.

In the present invention, the storage drum and the main nozzle are
It represents a series of devices until the wefts fly into the warp shed, and means a device including a guide in the middle. The weft inserting conditions referred to in the present invention include the weft storage speed of the storage drum, the timing at which the weft is unwound from the storage drum, and the timing at which the weft is driven from the main nozzle into the warp opening with compressed air.

The abnormality that occurs in the weft insertion channel in the present invention means that the operation of the jet loom that occurs in the process from the yarn feeding package to the main nozzle is hindered. For example, unwinding that occurs on the yarn supply package, weft entangled in the yarn guide (weft error), the weft slipping out of the main nozzle, or the weft exceeding the required number of turns is stored on the storage drum. It means that weft insertion is impossible due to phenomena such as being lost.

Here, the weaving method of the present invention will be described by taking as an example an air jet room having two sets (A set and B set) of yarn feeding packages, a storage drum and a weft insertion channel of a main nozzle shown in FIG. To do. Usually, in a jet loom, the weft yarns (7A, 7B) are fed into the yarn feeding packages (1A, 1B).
It is unwound from B), passes through several kinds of guides (2A, 2B), is stored in a storage drum (3A, 3B), and is weft-inserted into the warp opening through a main nozzle (4A, 4B).

On the other hand, between the yarn supplying package and the storage drum, on the storage drum, and further between the storage drum and the main nozzle, a sensor (8A, 8A, 8B, 9A, 9B, 10
A, 10B) For example, a photoelectric area sensor, a piezoelectric sensor, and the like are provided. First, two sets of weft inserting channels operate for one type of weft, and the unwinding speed from the yarn supplying package is 1/2 of the speed when one set of weft inserting channels is used. In the case where any one of the weft insertion channels has an abnormality, the weft storage speed of the storage drum of the other weft insertion channel becomes twice as fast as the steady state until now, and the weft insertion speed of the storage drum and the main nozzle etc. The entry conditions are also changed.

Now, temporarily, two sets of storage drums A and B and a main nozzle are operating, and the weft yarn 7A is entangled with the yarn guide 2A on the yarn supply package 1A of the set A, and the weft yarn is cut. When the weft is no longer wound around the storage drum 3A, the sensor 9 located above the storage drum
When A detects insufficient winding of wefts (presence or absence of wefts), the weft insertion channels of the group A are deactivated via the microprocessor.

At the same time, the weft storage speed of the storage drum in the weft insertion channel of the group B is doubled.
The weft insertion condition using the weft insertion channels of group B and group B was changed to weft insertion condition that weft insertion can be performed with only one main nozzle of group B, and only by the weft insertion channel of group B , The operation of the jet loom is done automatically. The weft insertion channel of the group A, which has become abnormal, is equipped with an alarm lamp for notifying the abnormality, and is left unattended until the worker comes to repair it.

Further, in the same manner as described above, a weft abnormality occurs in the weft insertion channel of one of the sets A, and at the same time the sensor detects this as an insufficient winding of the weft, and at the same time, in the warp shed, the weft reverses the fabric width. When the weft yarns that have not run properly remain in the warp opening without flying toward the main nozzle side, the jet loom is stopped by the sensor on the side opposite to the main nozzle side.

In the warp shed, the above-mentioned automation device is operated so that the weft yarn having a flying defect can be removed and restarted. At this time, the weft inserting condition such as doubling the weft storage speed of the storage drum of the weft inserting channel of the other group B is changed through the microprocessor so that the weft insertion can be performed by only one main nozzle. Therefore, only the weft inserting channel of the other group B restarts the weft inserting from the stopped state of the jet loom and automatically operates. One of the set A weft insertion channels, which has become abnormal, is provided with an alarm lamp for notifying the abnormality in the same manner as described above, and is left unattended until an operator comes to repair it.

In the abnormal state of the weft inserting channel of the group A, if a worker comes to a repair and restores the normal state, it waits as a spare weft inserting channel that can be restarted.
Further, it can be set so that the weft inserting channel of the group A automatically restarts weft insertion after a few seconds and can be restarted by the two groups of the group A and the group B. Furthermore, for example, the entanglement of the weft ends in the warp shed occurs, the jet loom stops, the above-mentioned automation device operates, the weft of the entangled end is removed, and the jet loom can resume weft insertion. In this case, the two sets of storage drums A and B and the main nozzle are in a ready state for operation, and when the weft insertion is restarted, the two sets can perform weft insertion in the same steady state as before. ..

However, it will be clear that the invention is not limited to the two sets of weft insertion channels as indicated by the above description. For example, in a jet loom where the weft storage speed of a steady state storage drum with three sets of weft insertion channels is 1/3 the speed of one set of weft insertion channels, one of the three sets When it becomes impossible, the weft insertion conditions such as the weft storage speed of the storage drum and the unwinding condition of the weft in the remaining two sets of weft insertion channels are changed, that is, the weft storage speed of the storage drum is 1. 5
It was doubled and the weft insertion was immediately changed from the ratio of once every 3 times per channel to once every 2 times. Weaving was performed with these 2 sets of storage drum and main nozzle. It will continue.

Further, for example, when one set of the storage drum and the main nozzle is in an abnormal state and an error occurs in either of the two sets of the storage drum and the main nozzle that are currently operating, the error occurs. The weft storage speed of the storage drum of the unset group is doubled (three times that when all three sets are in operation), and the weft unwinding condition is changed to continue weaving.

The winding condition around the storage drum and the unwinding condition of the weft yarn are input to the jet loom control panel in advance and set so as to be changed immediately depending on the number of main nozzles in operation. .. In addition, the above condition change is such that when three sets of weft insertion channels are operating and one set of weft insertion channels becomes abnormal and weft insertion is impossible, one of the remaining two sets is set. This can also be achieved by changing the weft storage condition of the storage drum and the unwinding condition of the weft, but not changing the other set of conditions.

Further, even when a plurality of sets of weft inserting channels are in operation and one set of weft inserting channels becomes abnormal and weft insertion is impossible, only one set of the remaining storage drums remains. It can also be achieved by changing the weft storage condition and the weft unwinding condition, and leaving the remaining set of conditions unchanged. In addition, if one or two of the three weft insertion channels have an abnormality and weft insertion is not possible, a worker will come around and repair the abnormal condition to restore the normal condition. It is also possible to set the returned weft storage drum and the set of two weft storage drums and the main nozzle to start weft insertion after a few seconds.

As described above, it is obvious that the present invention can be applied to a jet loom having three or more sets of storage drums and main nozzles. Furthermore, the weaving method of the present invention can be applied to the case where there are two types of weft yarns. That is, when there are two types of wefts, it is usually 2
Although weaving is performed using a set of weft inserting channels, in the present invention, weaving may be performed by operating a plurality of sets of weft inserting channels according to the present invention using a jet loom having three or more sets of weft inserting channels.

For example, when weft insertion is performed using four sets of weft insertion channels and two sets of weft insertion channels for each weft type, the weaving method of the present invention is applied to each yarn type. If the method is used, the effect is great and it is a preferable method. When two sets and one set of wefts are inserted in a jet loom provided with three sets of weft insertion channels, the effect can be sufficiently exerted even if the method of the present invention is applied to the two sets.

Similarly, even when there are three or more types of weft yarns, it is possible to easily improve the operating rate by applying the present invention. Further, the present invention can easily apply the weaving method of the present invention and operates even if there are three or more kinds of weft yarns as long as the jet loom allows one kind of weft yarn to be weft-inserted by a plurality of sets of weft-inserting channels. A rate increase can be achieved.

However, when considering the space and the like, it is preferable that the number of weft yarns is at most about 4, and up to about 6 sets of storage drums and an air jet room having weft-inserting channels such as main nozzles are used in the present invention. It is preferable to use a weaving method. Furthermore, the weaving method of the present invention can move in synchronization with the movement of the main nozzle, and can be stopped by providing a clutch so that the movement can be stopped independently of the movement of the main nozzle. The weft insertion nozzle is provided above (on the storage drum side) immediately before the main nozzle. As a result, if the weft thread comes out of the main nozzle, the weft thread can be inserted into the main nozzle during the swing motion.

Here, the weft insertion operation into the main nozzle when the weft comes out from the main nozzle will be specifically described. Since the main nozzle is installed in the lead holder of the jet room and swings together with the lead holder, it is usually impossible to insert and pull the weft into the main nozzle in an operating state. However, in the weaving method according to the present invention, once the above-mentioned clutch is disengaged,
The weft is inserted into the nozzle on the rocking device in the stopped state, and then the clutch is engaged to move the rocking device in synchronization with the movement of the main nozzle. After confirming that the centers coincide with each other, the insertion nozzle on the rocking device is jetted to insert the weft yarn into the main nozzle and pull it through.

By using the weaving method according to the present invention in combination with an automatic weft repairing device which automatically removes a defective weft yarn when the jet loom is stopped and automatically restarts it, all weft insertion defects are eliminated. By removing it, the jet loom can be continuously operated without disturbing workers such as maintenance workers and weavers, and the jet loom operating rate can be improved. In addition, the present invention greatly saves the labor of the worker, which contributes to labor saving.

[0029]

EXAMPLES One example of the weaving method according to the present invention will be described below.
However, it is obvious that the present invention is not limited to the present embodiment.

[0030]

[Embodiment 1] A woven fabric is made of cupra rayon yarn 50d /
36f, cupra rayon yarn 75d / 74f is used for the weft, and the warp and weft densities are 135 threads / 2.54 cm,
A taffeta fabric having a standard of 86 pieces / 2.54 cm was woven.
The weaving method uses the following three air jet looms. When an abnormality occurs in one weft insertion channel, weft insertion conditions of the other weft insertion channel are changed to continue weft insertion, and other normal 3 people in the 1st shift, 3 in the 2nd shift with 126 operating tables equipped with a set of weft insertion channels
The weaving personnel of 2 people in the 3rd shift managed the operation rate for 3 months. The first shift is from 7:00 to 1
5:00, 2nd shift from 15:00 to 23:00
The third shift is from 23:00 to 7:00.

The air jet loom is made by Tsudakoma Kogyo Co., Ltd., which has two sets of weft insertion channels, and the product name is Z.
An A-103 type equipped with an automatic weft repair / restart device was used. The rotation speed was 700 rpm.

[0032]

[Comparative Example 1] ZA-1 equipped with a set of weft insertion channels
The same conditions as in Example 1 were used except that a 03 type air jet loom was used. The results are shown in Table 1. The average operating rate of Example 1 was 98.5%, and the average operating rate of Comparative Example 1 was 92.4%. By using the weaving method according to the present invention, the portion from the yarn supplying package to the main nozzle The downtime due to the abnormal condition at the jetty was shortened, and the effect of improving the operating rate of the jet loom is shown. In particular, it can be seen that the effect is great at midnight (the third shift).

[0033]

[Table 1]

[0034]

According to the weaving method of the present invention, the unwinding failure that occurs on the yarn supplying package due to the increase in the number of rotations of the jet loom can be significantly reduced, and even if an abnormality occurs in the weft insertion, The weft insertion condition is changed to enable continuous operation of the jet loom, and even when the jet loom is stopped, the time can be shortened and the operating rate can be further improved.
Further, since the weaving method of the present invention can reduce the work load of the worker, it is also useful for labor saving.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing a weft insertion state in an air jet room provided with two sets of weft insertion channels.

[Explanation of Codes] 1A, 1B Yarn feeding package 2A, 2B Yarn guide 3A, 3B Storage drum 4A, 4B Main nozzle 5 Reed 6 Woven fabric 7A, 7B Weft 8A, 8B Between yarn feeding package and storage drum Sensors 9A, 9B Sensors on storage drum 10A, 10B Sensor between storage drum and main nozzle 11 Weft insertion nozzle to main nozzle

Claims (1)

What is claimed is: 1. A jet loom comprising a plurality of sets of weft insertion channels for a yarn feed package, a storage drum, and a main nozzle for one type of weft, and any one of the plurality of sets of weft insertion channels. If an abnormality occurs in one set, the weft insertion conditions of the remaining weft insertion channels except the channel in which the abnormality has occurred are changed, and weft insertion is continued only in the remaining weft insertion channels. Weaving method in a jet loom.