JPH02234961A - Fragment loom - Google Patents

Abstract

PURPOSE:To provide a fragment loom provided with a twisting means intermittently operated synchronous to the rotation of the fragment loom, a yarn-holding means, a heat-treatment means, a yarn-storage means, a yarn-end treating means, etc., and capable of simultaneously performing the alternate twisting operation and the waving operation. CONSTITUTION:The objective fragment loom is provided, at the upstream side of a weft insertion nozzle 1, with a twisting means 2 intermittently operated synchronous to the rotation of the fragment loom, yarn holding means 9,10 placed before and behind the twisting means interposing a definite distance, heat-treatment means 3,3 to heat-set an alternately twisted yarn composed of S-twist and Z-twist applied by the twisting means 2, a means 4 for take up the heat-set alternately twisted yarn and temporarily storing the yarn and a yarn-end treating means 6 composed of a cutter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fragmentary loom that weaves using alternately twisted yarn having S twist and two twists at regular intervals.

[Prior Art] Conventionally, weaving methods using twisted threads as wefts have been commonly practiced. In the conventional method, when using twisted yarn for the weft, the twisted yarn is processed in advance in a twisting process and then used. Conventional methods require a twisting process as described above, which not only increases the number of steps, but also lowers productivity.Furthermore, in order to use the twisting process, it is necessary to increase the amount of yarn above a certain level. In some cases, it was not possible to satisfy detailed demand requirements, and it was not suitable for high-mix, low-volume production.

Furthermore, although a method of imparting alternate twists to yarn using a false twisting device is known, conventional alternately twisted yarns have S and Z twists imparted at random lengths and periods, so when made into a fabric, The effect of alternating twist appears randomly on the surface of the fabric, resulting in a decrease in quality, and the effect of the twisting torque that real twist yarn has is not exerted, so this type of yarn is not actually used much. It is in.

[Object of the Invention] The purpose of the present invention is to solve such conventional problems, and when manufacturing a twisted yarn fabric using alternately twisted yarns that are twisted in different directions at regular intervals, the creation of the alternately twisted yarns and the alternating The object of the present invention is to propose a novel piece loom that simultaneously performs weaving using twisted yarn.

[Structure of the Invention] The present invention provides a heating device that operates intermittently in synchronization with the rotation of a fragment loom, a yarn gripping device provided at a certain distance before and after the heating device, and a yarn gripping device that is provided by the heating device at a certain distance. a heat treatment device for fixing the alternately twisted yarn consisting of S twist and Z twist; a device for taking and storing the alternately twisted yarn from the heat treatment device;
A fragmentary loom comprising: a yarn end processing device comprising a device for suctioning the yarn ends of the alternately twisted yarn pulled out from the storage device and a cutter; and a means for inserting the alternately twisted yarn with treated yarn ends into the weft. be.

In the present invention, a fragment loom is a loom that performs weaving by cutting the yarn end outside the edge of the fabric after weft insertion, and the weft insertion means itself is a known method. Specifically, one that uses jet air (air jet loom)
, one that grips and transfers the yarn end (rapier loom or grabber loom), and one that uses jet water (water jet loom).

Hereinafter, the present invention will be explained with reference to the drawings. FIG. 1 is a diagram illustrating a device for imparting alternate twist to yarn used in the fragmentary loom of the present invention. In FIG. 1, a yarn 8 made of thermoplastic synthetic fibers is pulled out from a package 8' and supplied to yarn gripping devices 9 and IO provided at regular intervals, but this supply is performed intermittently.

The yarn length that is approximately the same as the interval between the yarn gripping devices 9 and 10 is supplied at one time. The yarn gripping device 9.10
The yarn 8 fed thereto is twisted by applying a turning force to the yarn by the heating device 2 arranged in the intermediate region of the yarn gripping device 9,10. The heating device is preferably a disk-type or spindle-type false twister, but is not limited thereto. The heating device is arranged in the intermediate region of the yarn gripping device 9.10, but not necessarily in the yarn gripping device 9, I
It does not need to be on the straight line connecting O, and may be off the line. Further, the number of heating devices is not limited to one, and a plurality of heating devices may be arranged. Further, upstream and downstream of the heating device 2, heat treatment devices 3 are arranged to heat-fix the twist imparted by the heating device. As a result, the yarn is S-twisted at regular intervals, 2
Twists in different directions of twist are fixed.

Since the thermoplastic synthetic fiber yarn 8 is intermittently supplied at regular intervals as described above, an alternately twisted yarn in which twists in different directions appear alternately can be obtained. The alternately twisted yarn is then taken up by the yarn storage device 4, and a certain amount is wound up. Although any known device can be used for the yarn storage device 4, in the present invention, the yarn storage device 4 has the function of intermittently taking over and winding the thermoplastic synthetic fiber yarn 8. Due to this take-up action, the yarn is passively and intermittently supplied from the package 8''.Therefore, the operation of the yarn storage device 4 must be performed in synchronization with the rotation of the loom.Yarn 8 is intermittently taken up by the yarn storage device 4, and as a result is intermittently supplied to the yarn gripping device 9, 0.
The amount of take-up (that is, the amount of supply) at one time is approximately the same length as the interval between the yarn gripping devices 9 and IO. The alternately twisted yarn wound up on the yarn storage device 4 is then supplied to the weft nozzle 1, and the supply to the weft nozzle 1 is adjusted according to the width of the fabric. A constant amount is supplied by the movement of claws (not shown) holding down the alternately twisted yarn. 6.7 is a yarn end processing device, 7 is a device that sucks the yarn end using suction, and 6 is a cutter that cuts the yarn end.

FIG. 2 is a plan view showing another aspect of the heating device and heat treatment device used in the present invention, and what is shown in FIG. 2 is an example in which a plurality of heating devices are used.

In FIG. 2, a thread 8 made of thermoplastic synthetic fiber is pulled out from a package 8°, and thread gripping devices 9 are provided at regular intervals. The yarn gripping device 9,
A plurality of heating devices 2 are used during IO. The threads heated by the plurality of heating devices 2 are twisted in opposite directions between the heating devices. That is, the portions 81 and 82 in FIG. 2 are twisted in opposite directions, and the portions 82 and 83 are also twisted in opposite directions.

3 indicated by a broken line indicates a heat treatment device, and in this case, a plurality of weft yarns are heat treated at one time. A non-contact heating device such as a plate heater is used as the heat treatment device. The yarn pulled out from the yarn gripping device IO is prepared for weft insertion in the same manner as shown in FIG. The yarn gripping device 9.10 used in the present invention may be one that uses two discs and grips the yarn by sandwiching the yarn between the disks, and grips the yarn by moving either of the disks up and down. However, the timing of the gripping is performed in synchronization with the movement of the yarn storage device 4. In the fragment loom of the present invention,
In order to weave the fabric, the length of the S twist or Z twist present in the alternately twisted yarn is approximately equal to the length equivalent to the weft width of the fabric, or is an integral multiple of the length equivalent to the weft width, and,
A preferred method of use is to insert the weft so that the reversal point of the S twist and Z twist of the alternately twisted yarn is located outside the edge of the fabric. That is, when weaving a twisted yarn fabric by using a fragmentary loom using alternating twisted yarns having S twist and Z twist alternately at regular intervals as weft yarns, the reversal point of the S twist and Z twist of the alternating twisted yarn is Weft insertion is performed by placing the weft outside the edge of the fabric.

The weft yarn is wound onto the weft yarn storage device 4, and then the weft yarn is supplied from the weft yarn storage device 4 to the weft insertion nozzle 7 and driven into the warp opening to perform weft insertion. The driven weft yarns form the weft yarns of the fabric, and the weft yarns have the same twist direction within the width of the fabric. One weft yarn may have a twist in the same direction as other adjacent weft yarns, but it may also have a twist in the opposite direction.

When a book weft has a twist different from other adjacent wefts, there must be a twist reversal point, and the reversal point should be outside the edge of the fabric. In other words, in weaving using a fragmentary loom, the yarn that lies outside the edge of the fabric is processed by a cutter and is separated from the fabric, but the reversal point of the S twist and Z twist occurs at the portion of the yarn that falls outside the edge of the fabric. Do it like this.

The reversal point of the S twist and Z twist is not necessarily placed on all the yarns outside the edge of the fabric, for example, when one weft yarn and another adjacent weft yarn have twists in the same direction. When there is no reversal point in the yarns between these weft yarns that are outside the edge of the fabric, and when the adjacent weft yarns have twists in different directions. In this method, weft insertion is performed so that there is a reversal point in the yarns between the weft yarns that are located outside the edges of the fabric.

The reversal point of the S twist and Z twist of the alternately twisted yarn can be arranged outside the edge of the fabric as follows. First, when inserting S twist and 2 twists every 1 weft insertion, in the process diagram shown in FIG. Adjust to twice the length, and. The length of the yarn stored in the weft storage device 4 is adjusted so that the length of the yarn between the weft insertion nozzles 1 at the tip of the weft storage device 4 is equal to the yarn length for two picks of weft insertion, and the marking device 1
Pull out the marked part of the yarn marked in step 1 to the tip of the weft insertion nozzle, and then start weft insertion.The reversal point of S twist or Z twist must be on one side of the fabric each time weft insertion. placed outside the ear end of the ear. 12 is a marking sensing device. In addition, when inserting S twist and 2 twist alternately every 2 wefts, the yarn gripping device 9.10 in Fig. 1
It is sufficient to make the interval between the two threads approximately four times the thread length corresponding to one pick of weft insertion.

[Example] A loom using a one-nozzle air jet as a weft insertion means (loom rotation speed 300 rpm, reed width 110 cm,
Weft insertion yarn length 11gcm, weft insertion speed 354m/mln.
), one set of spindle-type false twisting device is used as the heating device 2 shown in FIG. Using a non-contact heat treatment device that covers the gripping device 9 to the second yarn gripping device IO, the storage device 4
A drum-type storage device is used as the storage device 4, a blower suction-type suction device is used as the device 7 for sucking the end of the yarn drawn out from the storage device 4, and a shear-type cutter is used as the cutter, and an ink application device is used as the marking device 1L. type marking device, an image sensor is used as the marking sensing device 12, and the distance between the heating device 2 provided on the opposite side as the first yarn gripping device 9 is the same as that of the heating device 2 and the first yarn gripping device 9. The distance between the second gripping device 10 provided on the side and the second gripping device 10 is set to the same 10 cm, and the heating device 2
Bolier
/48 f11) The marked yarn end was moved out from the tip of the weft inserting nozzle by about 10 cm and the loom was started. As a result, a strong weft twist was obtained in which S twist and Z twist were arranged alternately every 1 weft. A fabric was obtained. The number of twists for S twist and Z twist is 2,850 each.
-2.750 T/H, and the reversal points of S twist and Z twist were all wound up on the yarn end treated yarn on the anti-nozzle side and did not fall within the width of the fabric. In addition, the number of stops due to the weft was 4.5 times/day, which was comparable to the weavability of conventional weft-twisted fabrics.

[Effects of the Invention] As described above, the fragment loom of the present invention simultaneously creates alternating twisted yarns having twists in different directions at regular intervals and performs weaving, and the twisting process is a separate process. The weaving is done all at once.

Therefore, it has been found to be an extremely effective means for efficiently performing high-mix, low-volume production and solving the problem of production delivery schedule management, where the yarn twisting process has been a bottleneck.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an alternate twisting device used in the fragment loom of the present invention, and FIG. 2 is a plan view showing another embodiment of the heating device and heat treatment device used in the present invention. 2... Heating device 3... Heat treatment device 4... Storage device 6... Cutter 7... Suction devices 9, 10... Yarn gripping device Fig. 2

Claims (1)

[Claims] (1) A heating device that operates intermittently in synchronization with the rotation of the fragment loom, a yarn gripping device installed at a certain distance before and after the heating device, and S twist and Z twist imparted by the heating device.
A heat treatment device for fixing alternately twisted yarn consisting of twisted yarn, a device for taking and storing the alternately twisted yarn from the heat treatment device, a device for suctioning the yarn end of the alternately twisted yarn pulled out from the storage device, and a yarn end consisting of a cutter. A piece loom comprising a processing device and means for inserting the alternately twisted yarn whose yarn ends have been treated.