JPH04272253A - Method for weaving with jet loom - Google Patents

Abstract

PURPOSE:To shorten a stopping time to improve the operation rate of a jet loom, by allowing one of two picking channels arranged in parallel to wait as a sub-channel and operating the sub-channel, when the loom is stopped owing to an abnormal operation occurred in the other picking channel. CONSTITUTION:Two picking channels comprising two fiber-supplying packages, two fiber-storing drums and a main nozzle are arranged in parallel. After wefts are stored and inserted into two the picking channels, one channel is allowed to wait as a sub-channel, and the other channel is operated to pick wefts. When the loom is stopped owing to the occurrence of an abnormal weft-picking operation in the other channel, the failed weft left in the opening of the main nozzle is removed and then the sub-channel is immediately operated to restart the picking operation, whereby the stopping time of the loom can be shortened without waiting a repairing work for the abnormal operation of the fiber- supplying package, the fiber-storing drum or the main nozzle in the abnormal operation-occurred channel.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet loom weaving method. More specifically, the present invention relates to a jet loom weaving method that can reduce downtime due to abnormalities in the yarn feeding section before the main nozzle.

0002

[Prior Art] Conventionally, as a technology to shorten the stop time of a loom and improve its operating rate, when the loom stops due to some kind of weft abnormality, it automatically extracts the damaged weft yarn that caused the abnormality. An automated device called an automatic weft repair restart device that starts weft picking has been developed.

By installing this automation device, it is possible to automatically restart the loom when the loom stops due to a specific weft thread. Previously, if automated equipment was not installed, maintenance workers or weavers would pull out the damaged weft threads, align the weft threads, and then restart the weft. By installing an automation device, there is no longer a need for maintenance workers or weavers to wait until they arrive at the stopped loom, reducing the loom stoppage time and improving the loom operating rate.

However, in the case of a jet loom, the above-mentioned automated device does not work properly when a weft yarn comes off the main nozzle, or when an abnormality such as weft yarn breakage occurs between the yarn supply package and the main nozzle and the loom stops. It doesn't work. The loom can be restarted automatically only when the weft yarn remains in the main nozzle and the loom is stopped due to an abnormality after the main nozzle, that is, during the weft flight.

[0005] Therefore, if the weft yarn comes off from the main nozzle, or if an abnormality occurs between the yarn supply package and the main nozzle, the above automated device cannot automatically restart the loom. There is a problem in that the loom must be stopped until a maintenance worker or weaver who is patrolling the factory arrives, inserts the weft thread through the main nozzle, and restarts it.

[0006] In addition, as a method for reducing downtime due to yarn breakage in the yarn feeding section of a rapier loom, two or more parallel yarn feeding channels for weft yarns of a predetermined color are alternately operated in a normal state, that is, in a mixed mode. There is a way to make it work. In the above method, a yarn feeding device is installed between the yarn feeding package and the rapier device, and a piezoelectric sensor is installed in the yarn feeding portion of this yarn feeding device to detect yarn breakage and stop supplying the weft yarn through this channel.
This is to prevent the loom from stopping by continuing to supply weft yarns of the same color through the other channels alone.

However, the rapier loom weaving method described above has a problem in that yarn breakage between the yarn feeding device and the weft insertion device and abnormalities in the weft insertion device cannot be detected.

[0008]

[Problems to be Solved by the Invention] An object of the present invention is to provide a backup device in the event that a weft yarn comes off from the main nozzle or in the event that an abnormality such as weft yarn breakage occurs between the yarn supply package and the main nozzle. To provide a jet loom weaving method capable of automatically restarting a loom using a weaving machine, and shortening the stop time of the loom by drawing the weft thread through the main nozzle while in operation and keeping it on standby as a spare. There is a particular thing.

[0009]

[Means for Solving the Problems] That is, the present invention has the following features:
A jet loom weaving method using two or more sets of weft entry channels of a yarn feeding package, a storage drum, and a main nozzle for different kinds of weft yarns, wherein at least one set of the two or more sets of channels is initially operated as a reserve channel. figure,
If an abnormality occurs in one set of channels that is initially activated and the loom stops, the one set of backup lines mentioned above operates in place of the one set of channels in which the abnormality occurred, and one channel is always on standby. This is a jet loom weaving method, which is characterized by:

The present invention will be explained in detail below using an example of an air jet loom. Figure 1 shows weaving in an air jet loom using two sets of parallel channels: a supply package (3A, 3B) for one type of weft, a storage drum (2A, 2B), and a main nozzle (1A, 1B). It is a diagram. 2
The same type of weft yarn is stored and inserted in each set of yarn supply package, storage drum, and main nozzle channel, and usually one set (for example, channel A) of the storage drum and main nozzle channel. Weaving is performed by letting the weft yarns of one yarn feeding package (3A) fly.

[0011] The weft yarn of the other yarn feeding package (3B) is stored and inserted in the storage drum and main nozzle of the other set (for example, channel B), and is kept on standby as a reserve. It is in. On the other hand, sensors (8A, 8B, 9A, 9B) are provided between the yarn supply package and the storage drum and between the storage drum and the main nozzle to detect weft abnormalities such as weft breakage (Figure 1). .

Sensors used in the weaving method of the present invention include photoelectric area sensors, piezoelectric sensors, and the like. In the weaving method of the present invention, during weaving by flying the weft yarn, there is a gap between the yarn supply package (3A) and the storage drum (2A), and between the storage drum (2A) and the main nozzle (1A). If an abnormality occurs, detected by the sensor, and the loom is stopped via the microprocessor, the standby spare B channel will automatically operate in place of the active A channel. In this manner, the method of the present invention allows restarting without waiting for the repair work of the yarn feeding package or storage drum main nozzle in which an abnormality has occurred.

Furthermore, the weft yarn is moved to the main nozzle on a swinging device that moves in synchronization with the movement of the main nozzle and is equipped with a clutch so that the movement can be stopped at any time regardless of the movement of the main nozzle. (10) with a fixed nozzle for pulling through and inserting it (
It is provided on the storage drum side). As a result, if the weft yarn comes off from the main nozzle, the weft yarn can be pulled through and inserted into the main nozzle which is in the oscillating motion.

Regarding the A channel of the yarn feeding package, the storage drum, and the main drum in which the abnormality occurred, repair is performed while the B channel of the spare storage drum and the main nozzle is operating, and the spare channel that is in operation is repaired. The system is kept on standby so that it can operate again in the event that an abnormality occurs. In this way, the two sets of channels alternate between activation and standby.

[0015] If the weft yarn has come off from the main nozzle, the work of inserting the weft yarn into the main nozzle will be explained in detail.The main nozzle is installed in the reed holder of the loom and performs an oscillating motion together with the reed holder. from,
Normally, it is not possible to insert and draw the weft thread through the main nozzle during operation. In the weaving method of the present invention, the clutch described above is first disengaged and the weft is inserted into the nozzle on the swinging device which is in a stopped state, and then the clutch is engaged and the weft is oscillated in synchronization with the movement of the main nozzle. exercise the device;
After confirming that the centers of the nozzle on the swinging device and the main nozzle are aligned, the nozzle on the swinging device is activated to insert and draw the weft thread through the main nozzle.

For example, when there are two kinds of weft yarns, two sets of storage drums and main nozzles are normally used at the same time for weaving, but in the present invention, three or four sets of storage drums and main nozzles are used at the same time. Using the storage drum and main nozzle channel, one or two sets of reserve storage drum and main nozzle
The sets of channels are operated in the same manner as described above to effect weaving. In this case, it is more desirable to use the same number of reserve storage drums and main nozzle channels as the number of types of weft yarns.

[0017] In the present invention, an abnormality between the yarn supply package and the storage drum or between the storage drum and the main nozzle is defined as a case where the weft yarn is pulled out or detached from the main nozzle, or an abnormality between the yarn supply package and the main nozzle. Weft cutting between
Refers to all abnormalities that occur between the yarn supply package and the main nozzle and cause the loom to stop, such as wrapping around the storage drum.

[0018] In the weaving method of the present invention, when the loom stops,
By combining an automated device called an automatic weft repair restart device that automatically pulls out damaged weft threads and automatically starts weft insertion, it is now possible to automatically restart the loom in the event of any weft abnormality. This eliminates the waiting time for maintenance workers and weavers to start repairing the loom, and improves the loom operating rate.

Further, even if the loom is not equipped with the above-mentioned automation device, according to the weaving method of the present invention, a set of channels consisting of a spare yarn supply package, a storage drum, and a main nozzle are on standby. , maintenance workers, and weavers do not need to repair abnormalities in the yarn feeding package, storage drum, or main nozzle to restart the loom; they can restart the loom immediately, which reduces the work time required for repairs and increases loom utilization. This will lead to improved performance.

[0020]

【Example】

[0021]

[Example 1, Comparative Example 1] An example of the weaving method according to the present invention will be described below. However, it is clear that the present invention is not limited to this example. The loom is an Air Jet Loom (manufactured by Tsudakoma Co., Ltd., product name Z).
A103 type) was equipped with an automatic weft repair restart device and activated, and weaving was performed at a rotational speed of 600 rpm.

[0022] The fabric is made of polyester 75d/36f in the warp.
, using polyester 100d/48f processed yarn for the weft,
Longitudinal and latitudinal density: 105/2.54cm, 78/
Woolly taffeta with a standard of 2.54 cm was woven. The test method was to use 3 units each for both Example 1 and Comparative Example 1 together with 94 other operating units, 2 people on the 1st and 2nd shifts, and 1 person on the 3rd shift.
The operation rate was measured over a three-month period under the supervision of a total of 1,000 weavers.

[0023]The first shift is from 7:00 to 15:00.
0 minutes, 2nd shift from 15:00 to 23:00, 3rd shift
The shift is from 23:00 to 7:00. As Example 1, weaving was carried out using two sets of yarn feeding packages, a storage drum, and a main nozzle channel, one set of which was used as a reserve, and an air jet loom using a photoelectric area sensor as a sensor. The results are shown in Table 1. The average operating rate was 98%.

Comparative Example 1 uses a set of yarn feeding package, storage drum and main nozzle channel, and Example 1
Weaving was carried out under the same conditions. The results are shown in Table 1. The average operating rate was 94%. As is clear from Example 1 and Comparative Example 1, by using the weaving method according to the present invention, it is possible to shorten the stop time due to abnormalities in the yarn feeding section and improve the loom operating rate by 4%. It can be seen that the effect is particularly large late at night (third shift).

[0025]

[Table 1]

[0026]

[Effects of the Invention] Compared to the conventional weaving method equipped with only an automatic weft repair and restart device, the weaving method of the present invention can shorten the downtime due to yarn breakage at the yarn feeding section and weft abnormalities, and reduce the time required for loom operation. rate can be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of weaving one type of weft yarn in an air jet loom using two sets of yarn supply packages, a storage drum, and a main nozzle.

[Explanation of symbols]

1A Main nozzle that initially operates 1B Spare main nozzle that does not initially operate 2A Storage drum that initially operates 2B Spare storage drum that does not initially operate 3A Yarn feeding package that initially operates 3B Yarn feeding package that does not initially operate 4 Weft yarn 5 Reed 6 Heald 7 Weaving Fabrics 8A, 8B Sensors 9A, 9B between the yarn feeding package and the storage drum Sensors between the storage drum and the main nozzle

Claims (1)

[Claims] 1. A jet loom weaving method using two or more sets of weft entry channels of a yarn feeding package, a storage drum, and a main nozzle for one type of weft, wherein at least one set of the two or more sets of channels is used as a spare. If an abnormality occurs in one set of channels that initially operates and the loom stops, the one set of spare channels operates in place of the one set of channels in which the abnormality has occurred, A jet loom weaving method characterized by one channel always being on standby.