JPH042701B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a jet loom for weaving using air or water, and more specifically, a method for measuring the lengths of weft yarns from a plurality of cheeses using a plurality of measuring drums in the jet loom. Concerning mixing techniques.

<Description of Prior Art> Conventional weft length measuring devices for jet rooms include an air pool method in which the weft is stored in a pool pipe using a compressed air nozzle, a rotary type, or a drum pool method in which the weft is wound and stored around the circumference of a spinning drum. Various things have been proposed. However, in the air pool method, if the wefts are unwound from a plurality of weft cheeses and used for mixing, there is a concern that the plurality of wefts may become entangled.

On the other hand, in a conventional drum-type weft length measuring device, weft storage and length measurement are performed using a pin that controls the winding of the weft around the drum and a pin that controls the withdrawal of the weft from the drum. When mixing weft yarns from multiple cheeses using this conventional weft length measuring device, length measuring drums are installed corresponding to each weft yarn cheese, but in the conventionally proposed method, each drum circumferential surface is In addition to the two pins mentioned above, a third pin is required to control the unwinding of the weft from the weft (see Japanese Patent Application Laid-open No. 79740/1983). As described above, it is extremely difficult to accommodate a total of three pins and their drive mechanism in a small length measuring drum or to install them nearby. Therefore, it is difficult to put it into practical use.

In addition, when a conventional weft length measuring device is used for two-koshi, two wefts are inserted twice in turn, so one weft is inserted twice while the other weft is inserted two picks. It is necessary to store the weft for the first pick and lock it in the middle so that the second pick weft is not pulled out when inserting the first pick. For this reason,
Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 57-82546, in addition to the two pins mentioned above, a pin for sorting between two picks, that is, a total of three pins, has been used.
It has been proposed to house the book pin and its drive mechanism in or near a small measuring drum. However, considering the actual installation space, it is extremely difficult to design in this way.

<Purpose of the Invention> The present invention solves the problems associated with the prior art as described above, and provides a practical solution that enables reliable mixing of multiple weft yarns using a weft length measuring drum that can be installed in a narrow installation space. The purpose is to provide a method with significantly higher sexual performance.

<Background of the Invention> When weft yarn is continuously fed from one measuring drum to a jet nozzle without mixing,
Since the length of the weft thread for one pick must be measured for each cycle of weft insertion (one revolution of the crank), there is no time to measure the weft thread accurately.
It was thought that it was necessary to use multiple pins to measure and feed the pick's worth of weft threads. Similarly, even in the case of mixing, it was thought that three length measuring pins were required to insert two picks continuously, as disclosed in Japanese Patent Application Laid-Open No. 82546/1982.

However, the present inventor has discovered that when two consecutive picks of weft yarns in one complete weft thread (a repeating unit of a textile structure) are measured using one length measuring drum during mixing, the weft insertion operation for one complete thread is sufficient. It is only necessary to measure the length of two picks of weft yarn on the length measuring drum during the measurement, and the length measurement can be carried out with a comparatively high margin. By appropriately selecting the timing of the pin that controls the winding of the weft yarn and the pin that controls the withdrawal of the weft yarn from the measuring drum,
The present invention was conceived by paying attention to the fact that the length of the weft yarn can be measured without using a third pin.

<Structure of the Invention> That is, the present invention provides a mixing method in a jet room in which the lengths of a plurality of weft yarns are measured by a plurality of length-measuring drums and supplied to a jet nozzle, in which at least one of the plurality of length-measuring drums is supplied to a jet nozzle. has two pins: an A pin that appears and retracts at a fixed position on the jet nozzle side, and a B pin that appears and retracts at a fixed position on the weft winding side, and between the A pin and B pin, the weft for one pick is store and
The weft thread is inserted by releasing the weft thread from the A pin, and the weft thread that was locked on the B pin during the weft insertion period is transferred to the A pin side by releasing the weft thread from the B pin, and the weft thread is inserted between the A pin and the B pin. When one pick's worth of weft yarn is stored, the weft yarn is locked by the B pin, the weft yarn is wound on the upstream side of the B pin, and two consecutive picks' worth of weft yarn is measured in the length of the weft yarn. This is a mixing method in a jet room characterized by length measurement using a drum.

<Description of Examples> Hereinafter, the present invention will be described in detail based on Examples.
FIG. 1 is a schematic plan view of an air jet room for carrying out the method of the present invention. cheese 11,2
The weft yarns W1 and W2 unwound from 1 are supplied to winding tubes 13 and 23 via yarn guides 12 and 22, respectively. The winding tubes 13, 23 are connected to the length measuring drum 14,
24, thereby weft threads W1, W2
is wound around the circumferential surface of the length measuring drums 14, 24. The length measuring drums 14, 24 have jet nozzles 17, 2
A pins 19 and 29 are located on the weft winding side and protrude and retract from the circumferential surface of the length measuring drums 14 and 24 in time with the crank angle of the loom at this position, and A pins 19 and 29 are located on the weft winding side and adjust the crank angle of the loom at this position. The B pins 18, 28 retract from the circumferential surface of the length measuring drums 14, 24 in synchronization with the
Each has two pins. As will be described later, the length measuring drum 1 is
4, 24 and the movement of the A pins 19, 29 and B pins 18, 28 in synchronization with the crank movement of the loom, the weft W.
1 and W2 are measured by length measuring drums 14 and 24. The weft yarns W1 and W2 unwound from the length measuring drums 14 and 24 pass through guides 15 and 25, and then pass through the grippers 16, which open and close in synchronization with the crank motion of the loom.
Jet nozzle 1 is alternately controlled by
7,27. the jet nozzle 17,
The weft is inserted into the opening between the upper and lower warps by 27, and then beaten by the reed 30.

In the method of the present invention, three or more weft threads can be wefted for two consecutive picks in one complete weft woven structure by skillfully adjusting the winding timing of the weft thread and the operation timing of the A pin and the B pin. Instead, the length is measured by at least one of the length measuring drums 14 and 24 having two pins. More specifically, as shown in the example, when supplying the weft for two consecutive picks, the A pin is first lowered to remove the weft for one pick that has been stored on the drum circumferential surface upstream of the A pin. The weft is measured and supplied to the jet nozzle as a weft for the first weft insertion, and when the first weft insertion is almost completed, the B pin is lowered and the weft begins to be wound and stored on the circumferential surface of the drum upstream of the B pin. The weft is transferred between the A pin and the B pin and fed to the jet nozzle as the second weft insertion weft, and then the A pin is raised to measure the length of the second weft insertion, and then the second weft insertion is carried out on the circumference of the drum. When the pick's worth of weft threads have been wound, the B pin is raised and the next
The weft yarn is stored on the circumferential surface of the drum between the A pin and the B pin in preparation for the next weft insertion for two consecutive picks.

Examples with different weft winding timings and operation timings of the A pin and B pin will be described with reference to FIGS. 2 and 3.

In the operating timing diagram shown in FIG.
The system consists of supplying the weft for a pick, and supplying the weft for one pick from the second measuring drum 24 following the supply of the weft for two consecutive picks shown in the lower part of FIG. By rotating three times, the length of one complete weft thread is measured.

During the first rotation of the loom, when the crank angle is approximately 0°, the A pin 19 of the first length measuring drum 14
begins to fall, while the B pin 18 is rising. As the A pin 19 lowers, the A pin 19 and B
The weft W1 stored on the circumferential surface of the first length-measuring drum 14 between the pin 18 and the first length-measuring drum 14
The weft is unwound from the weft, supplied to the jet nozzle 17, and inserted into the weft (crank angle 90°). When approximately one pick's worth of weft yarn W1 is supplied, the B pin 18 is lowered, while the A pin 19 is raised. In this way, the weft W1 stored on the circumferential surface of the first length measuring drum 14 upstream of the B pin 18 is transferred to the circumferential surface of the first length measuring drum 14 between the A pin 19 and the B pin 18. At the same time, the supply of the weft W1 from the jet nozzle 17 is stopped (crank angle 270 to 360°). In this state, the weft W1 inserted from the jet nozzle 17 is beaten using the lead 30.

Next, the crank enters the second rotation, and A pin 19
is lowered, while the B pin 18 is raised and the first length measuring drum 14 between the A pin 19 and the B pin 18 is lowered.
Jet nozzle 1 removes the weft yarn W1 stored on the circumference.
7 and performs weft insertion for the second pick. When the weft insertion is completed, the B pin 18 descends and the B pin 18
The weft W1 stored on the circumferential surface of the first length measuring drum 14 upstream of the A pin 19 is transferred to the circumferential surface of the first length measuring drum 14 between the A pin 19 and the B pin 18.
to stop the weft supply. In addition, the weft of the first pick in the next continuous weft insertion is prevented from falling from the first length measuring drum 14.

When the crank angle reaches approximately 180° during the third rotation, the B pin 18 of the first length measuring drum 14 rises, and the weft W1 of the second pick on the circumferential surface of the first length measuring drum 14 The length measurements are stored.

On the other hand, in the second length measuring drum 24, the A pin 2
9 is rising, B pin 28 is falling,
The length of the weft W2 is measured and stored on the circumferential surface of the second length measuring drum 24. When the crank angle exceeds 180° in the second rotation, the B pin 28 rises and regulates the winding of the weft W2 around the second length measuring drum 24.
When the crank angle reaches approximately 300°, the A pin 29 descends, and at the crank angle of approximately 90° in the third rotation, the weft yarn W2 is supplied to the jet nozzle 27 to start inserting the weft yarn W2. is beaten with a reed 30 at the beginning of the next complete weft (that is, at the beginning of the fourth weft).

In the operation timing diagram shown in FIG. 3, one complete weft is supplied by two consecutive picks of weft from the first measuring drum 14 shown in the upper part of FIG. This consists of the supply of weft for two consecutive picks as shown in the figure, followed by the supply of weft for two consecutive picks from the second measuring drum 24, which is the so-called Futakoshi weft insertion, and the crank of the loom rotates four times. By doing so, one complete length measurement of the weft thread is performed.

During the first rotation of the loom, when the crank angle is approximately 0°, the A pin 19 of the first length measuring drum 14
begins to fall, while the B pin 18 is rising. As the A-pin 19 descends, the weft W1 stored on the circumferential surface of the first length-measuring drum 14 upstream of the A-pin 19 is unwound from the first length-measuring drum 14.
It is supplied to the jet nozzle 17 and inserted into the weft (crank angle 90°). When approximately one pick worth of weft yarn W1 is supplied to the jet nozzle 17, the B pin 1
With the weft W1 wound around several turns around the circumferential surface of the first measuring drum 14 upstream of the B pin 1
8 has started to fall, and it has been completely processed to support the second weft insertion session. , the weft yarn W1 stored on the circumferential surface of the first length measuring drum 14 upstream of the B pin 18 is
It is fed to the jet nozzle 17 while being transferred to the circumferential surface of the first length measuring drum 14 between the pin 19 and the B pin 18. While the B pin 18 is descending, the reed 30 beats the weft W1 of the first pick. In addition,
During this time, the A pin 19 remains lowered, but the clipper 16 moves the jet nozzle 1 of the weft W1.
7 is controlled (crank angle 270
~90°).

Next, the crank enters the second rotation, and B pin 18
rises. When the weft insertion is completed, the B pin 18 descends, and the first measuring drum 14 upstream of the B pin 18
Approximately one turn worth of weft W1 stored on the circumference is A
First length measuring drum 1 between pin 19 and B pin 18
While moving to the fourth circumferential surface, the A pin 19 is raised to prevent the weft of the first pick of the next continuous weft insertion from falling from the first length measuring drum 14.

The third rotation ends in this state, and when the crank angle reaches approximately 90° during the fourth rotation, the B pin 18
is raised, and the length of the weft yarn W1 corresponding to the second pick is stored on the circumferential surface of the first length measuring drum 14.

The B pin 28 and A pin 29 that protrude and retract from the second length measuring drum 24 and its circumferential surface are the same as the B pin 1 that protrudes and retracts from the first length measuring drum 14 and its circumferential surface.
8. It operates with a difference of two rotations in crank angle from the A pin 19.

<Effects of the present invention> As described above, according to the present invention, when measuring the length of two consecutive picks of weft yarns in one complete weft yarn using one length measuring drum during mixing,
It is only necessary to measure the length of two picks of weft yarn on the length measuring drum during one complete weft insertion operation, and the length measurement can be carried out with a comparatively large amount of time. Weft length can be measured without using a third pin by appropriately selecting the timing of attaching the weft yarn, the timing of the pin that controls the winding of the weft yarn around the length measuring drum, and the timing of the pin that controls the withdrawal of the weft yarn from the length measuring drum. We are focusing on the fact that it is possible. The method of the present invention uses only two weft control pins, which simplifies the structure of the weft length measuring device, solves the problems associated with the prior art, and allows it to be installed in a narrow installation space. It becomes possible to mix the weft threads reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an air jet room in which the method of the invention is carried out, and FIGS. 2 and 3 are operational diagrams of different embodiments of the method of the invention. 11, 21... Weft cheese, 14, 24... Length measuring drum, 17, 27... Jet nozzle, 1
8,28...B pin, 19,29...A pin, W
1, W2...Weft.

Claims (1)

[Scope of Claims] 1. A mixing method in a jet room in which the lengths of a plurality of weft yarns are measured by a plurality of length-measuring drums and supplied to a jet nozzle, wherein at least one of the plurality of length-measuring drums is connected to the jet nozzle. It has two pins: an A pin that appears and retracts at a fixed position on the weft winding side, and a B pin that appears and retracts at a fixed position on the weft winding side.
The weft for the pick is stored, the weft is inserted by releasing the weft of the A pin, and the weft is inserted during the weft insertion period.
By releasing the weft from the B pin, the weft thread held by the pin is transferred to the A pin side, and a 1st thread is created between the A pin and the B pin.
When the weft yarn for a pick is stored, the weft yarn is locked by a B pin, the weft yarn is wound on the upstream side of the B pin, and the weft yarn for two consecutive picks is stored in one complete weave structure of the weft yarn on the measuring drum. A mixing method in a jet room characterized by measuring the length by. 2. When supplying the weft yarn for two consecutive picks, first, the A pin is lowered and the weft yarn for one pick stored on the drum circumferential surface upstream of the A pin is transferred to the first pick.
The length of the weft yarn is measured and supplied to the jet nozzle as a weft yarn for weft insertion, and when the first weft insertion is almost completed, the B pin is lowered and the weft yarn A is wound around the circumferential surface of the drum upstream of the B pin and the weft yarn has started to be stored. The weft is fed to the jet nozzle as the second weft insertion while being transferred between the pin and B pin, and then the A pin is raised to stop supplying the second weft insertion. When the weft yarn is wound, the B pin is raised and the weft yarn is stored on the drum circumferential surface between the A pin and B pin as the weft yarn for the next first weft insertion, in preparation for the next consecutive weft insertion for two picks. A mixing method in a jet room according to claim 1. 3. One complete weft weave structure is made by supplying two consecutive picks of weft from the first length measuring drum and one pick from the second length measuring drum following the supply of weft for two consecutive picks. When measuring the length of two consecutive picks, the A pin moves up and down at the end of weft insertion for the first pick, and the first pick is fed during weft insertion for the two consecutive picks. 3. The mixing method in a jet room according to claim 2, wherein the length of the weft is measured. 4. One complete weft woven structure is formed by supplying two consecutive picks of weft from the first length-measuring drum and continuously supplying weft from the second length-measuring drum following the supply of weft for two consecutive picks. When measuring the weft length of the two consecutive two picks, the weft length of the first pick can be measured without the A pin moving up or down at the end of weft insertion for the first pick. 3. The mixing method in a jet room according to claim 2, wherein the length of the weft yarn of the second pick is measured subsequent to the length measurement of the weft yarn of the second pick.