JPS59143867A - Weft stagnating device of shuttleless loom - Google Patents

Abstract

PURPOSE:To reduce weft release resistance at the time of weft insertion as well as prevent wefts from getting nappy by putting a ring loosely fitted on the drum in pressure contact with the outside surface of drum by means of air stream and thereby retaining the wefts passing through a gap between the ring and drum. CONSTITUTION:In a shuttleless loom, a weft a from a weft bobbin 15 is sent through a yarn guide 16 to be pinched by a weft lead-in part 13 of a yarn stagnating drum 11 and a press roller 14, and then led through another yarn guide 17 onto the yarn stagnating drum 11. Weft b on the yarn stagnating drum 11 is sent through a gap between retaining drum 12 and ring 21, a yarn guide 20, and a gripper 19 to be led to a weft-in nozzle 18. While weft is stagnating under such a condition, the ring 21 is moved to the left by air stream f jetting out of a pipe 22 to attain pressure contact with the periphery 12a of said retaining drum 12 so as to grasp the weft c between the two 12 and 21. Then the weft b sent off from the contact part of the above-mentioned press roller 14 with the weft lead-in part 13 of weft stagnating drum 11 is wound on the weft stagnating drum 11 for the purpose of temporary storage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum-type weft storage device for a non-threaded loom, in which a ring loosely fitted on the drum is pressed against the outer circumferential surface of the drum by an air flow, so that the weft ring and the drum can be separated. It is an object of the present invention to provide a weft yarn storage device that holds the weft yarn passing between the yarn storage drums and winds and stores the weft yarns on a yarn storage drum.

When the weft is not wet, the weft yarn continuously supplied from the yarn feeder is measured to a predetermined length and temporarily stored in a drum type or air suction type weft storage device 1q.゛The i-thread is sent out intermittently.

In the drum-type ShoC yarn storage device, li! 1! Silk thread holding means is required to hold the ends of the weft threads when the weft threads that are continuously supplied are wound around the drum, and the weft thread holding means that has been commonly used in the past is the one on the nozzle side of the yarn storage drum. A brush or comb-like ring is provided at the end of the cotton thread, and the cotton thread is held in place by being engaged with the brush or comb-like ring. This structure holds the weft reliably and has a simple structure, but the resistance to releasing the weft during weft insertion is uneven, making it impossible to apply smooth and uniform tension to the weft, and depending on the type of weft. This invention was made to solve the drawbacks of conventional devices, such as causing fluff and loosening in the cotton yarn. It is an object of the present invention to provide a drum-type cotton yarn storage device that does not cause the risk of causing problems.

Explaining using the reference numerals given to the illustrated embodiments, the weft storage device of the present invention includes a yarn storage drum 11 that winds and stores the weft yarn a continuously supplied from a yarn feeder 15;
The holding drum 12 whose outer peripheral surface 12a is a conical surface is provided on the side of the weft insertion nozzle 18.
A link 21 is fitted to the outer periphery of the ring 21, and means 22 and 26 are provided for generating an air flow f5g flowing in a direction that urges the ring 21 toward the larger diameter side of the outer peripheral surface 12a. f5g moves the link 21 to the larger diameter side of the outer peripheral surface 12a of the holding drum and presses it against the holding drum 12, thereby passing between the holding drum 12 and the link 21 and guiding it to the injection nozzle 18. This device is characterized by gripping the weft C. During weft winding, the end C of the weft is gripped by the ring 21 and the holding drum 12, which are energized by the air flow f1g, and at the time of weft insertion, the nozzle 18 acts. Due to the weft insertion force, the weft C passing portion of the ring 21 is moved toward the small diameter side of the holding drum outer peripheral surface 12a, and a loose V is created between the holding drum 12 and the ring 21.
AS occurs, and the weft yarn wound and stored on the yarn storage drum 11 is fed out to the nozzle 18.

Next, further explanation will be given based on the illustrated embodiment.

1 to 4 show a first embodiment of the present invention. In the figures, 1 is a casing mounted on a loom frame (not shown), 2 is a gear casing sink 1 with a bearing 3,
4 is a drive shaft that is supported, 5 is a drum shaft that is supported on the cage sink 1 with a bearing 6.7, 8 is a drive gear fixed to the drive shaft 2, and 9 is fixed to the drum shaft 5 and meshes with the drive gear 8. This is a driven gear. Reference numeral 10 denotes a rotating drum fixed to the drum shaft 5. The rotating drum 10 is integrally formed with a yarn storage drum 11 and a holding drum 12, and the holding drum 12 has a small diameter on the weft payout side (nozzle side). It has a conical outer peripheral surface 12a. Reference numeral 13 denotes a weft introduction section extending from the yarn storage drum 11, and a press roller 14 is pressed against this weft introduction section 13. F, +, E and yarn a of the yarn bobbin 15 pass through the yarn guide 16, and are connected to the press roller 14. The 20 weft yarns are pinched by the outer periphery of the group 13 and pulled out, and stored in the yarn storage tram 11 clockwise. 17 is a yarn guide that guides one knot from the yarn input section 13 to the yarn storage drum 11; 18 is a V-shaped nozzle; 19 is a gripper; and 20 is a yarn that is fed out from the rotating drum 10. This is a yarn guide that guides the cotton yarn d that has been removed to the gripper 19.

During weft storage, it is necessary to hold the end C of the weft wound on the yarn storage drum 11. For this purpose, a link 21 is fitted around the outer periphery of the holding drum 12. Pipe 22 that blows out air flow f for energizing
is installed.

The ring 21 is a thin conical ring made of plastic or the like, and when the ring 21 is moved toward the larger diameter side of the outer circumferential surface 12a of the holding drum 1.
It has a structure that is fitted and crimped onto the pipe 2.
Fins 23 are integrally formed to allow the moving parts to receive the airflow f from 2 well. The pipe 22 is an annular pipe fixed to a stationary wing (not shown) surrounding the link 21, and includes a rough-in 23 (+) ij and a slit 24 for ejecting the air flow f. A through hole is provided, and the air supply pipe 25 communicates with a blower (not shown).

In the above configuration, the weft yarn a from the yarn hobbin 15 passes through the yarn guide 16, is held between the weft yarn introduction section 13 of the yarn storage drum and the press roller 14, and further passes through the yarn guide 17 and is transferred to the yarn storage drum. The weft yarn on this yarn storage drum 11 passes between the holding drum 12 and the link 21, passes through the yarn guide 20, chestnut soba 19, and is guided to the AUI insertion nozzle 18. . The rotating drum 10 is constantly rotating at a speed corresponding to the length of the stored weft yarns, and an air flow f is constantly ejected from the pipe 22.

In this state, when storing the weft, no tension is applied to the weft d guided from the rotating drum 10 to the nozzle 18, so the link 21 is moved by the airflow f from the pipe 22 to the large diameter of the holding drum outer peripheral surface 12'a. The holding drum outer peripheral surface 12 is moved to the side by the urging force of the air flow f.
a, grips the weft C passing between the holding drum 12 and the link 21 as shown in FIG. The weft thread that is let out from the contact part with the entry part 13 is wound and stored on the thread storage drum 11. Then, when the weft insertion nozzle 18 operates at a predetermined timing,
Weft yarn d guided from rotating drum 10 to nozzle 18
This tension causes the link 21 to move toward the smaller diameter side of the outer peripheral surface 12a of the holding drum, and as shown in FIG.
1, and the weft yarn wound around the yarn storage drum 11 passes through this M gap S and is fed out to the nozzle 18. Since the link 21 is only biased by the air flow f, if the bias force due to the air flow f is set to the minimum necessary value, the ring 21
The force required to move it is extremely small, so
The release resistance acting on the weft d during insertion is extremely small, and the inner peripheral surface of the ring 21 and the outer peripheral surface 12 of the holding drum 12
Since a is a smooth surface, there is no unevenness in the release resistance applied to the weft yarn d to be released, and a uniform release resistance is provided.

The second embodiment shown in FIG. 5 has an annular cover 26 covering the outer circumference of the holding drum 12 instead of the pipe 22 of the first embodiment. 12
a has a conical shape, and the link 21 has a fin 2.
3, so such a cover 26 is provided,
When air from a blower is supplied to the space inside the cover 26, an air flow g is generated inside the cover 26 that flows from the small diameter side to the large diameter side of the holding tram 12. Therefore, this air flow g
It is also possible to press the link 21 onto the holding drum 12 by urging the link 21 toward the larger diameter side of the holding drum 12 using the pressure.

In addition, in the illustrated embodiment, the yarn storage drum 11 and the holding drum 12 are integrally formed, but when, for example, a highly elastic weft is wound and stored, the holding drum 12
It is also possible to separate the yarn from the yarn storage drum 11 and rotate it slightly faster than the yarn storage drum 11, so that the weft yarn on the yarn storage drum 11 is wound and stored under a certain degree of tension.

As explained above, the weft storage device steam of the present invention is operated by the link energized by the air sieve and the holding drum.
The yarn is gripped at 8 degrees and the crystals and yarn are wound and stored on the yarn storage drum, and when loading the yarn, this link moves to the small diameter side of the holding drum and is released from the drum. 1′
Since the tau thread is designed to form a straight line through which the thread passes, it is possible to make the shoulder 1' (thread release resistance) extremely small when introducing and inserting, and to reduce the tension of the thread when releasing the thread. There is no unevenness, and there is no fuzzing or loosening of g and j yarns.Furthermore, according to the weft storage device of the present invention, the weft release resistance that acts when inserting the weft can be reduced compared to the conventional device. It can be made extremely /i-sample in comparison.

[Brief explanation of drawings]

1 to 4 are diagrams showing a first embodiment of the present invention,
FIG. 1 is a sectional view, FIGS. 2 and 3 are partially enlarged sectional views showing the state of the ring during weft holding and line release, and FIG. 4 is a side view. The fifth figure is a partially enlarged sectional view showing the main part of the second embodiment of the present invention. In the figure, a - d are the kiln system, f and g are the air flow, S is the play gap, 5 is the drum ili+i+, 10 is the rotating drum, 11 is the yarn storage drum, 12 is the holding drum, and 12a is the holding drum. Outer peripheral surface, 13 is weft entry, 14 is press roller,
15 is a marine bobbin, 18 is a weft insertion nozzle, 21 is a ring, 22 is a pipe, 23 is a fin, 24 is a slit, 2
5 is an air supply pipe, and 26 is a cover. Embedded patent attorney Takao Nishi

Claims (1)

[Claims] (1) A yarn storage drum that winds and stores the weft that is continuously supplied from a supply system source, and a holding tram whose outer peripheral surface is a circular Φ"L surface provided on the nozzle side of the yarn storage drum. a ring fitted around the outer periphery of the holding drum, and means for generating an air flow in a direction that urges the ring toward the larger diameter side of the outer peripheral surface; By moving the link to the larger diameter side of the outer peripheral surface of the holding drum and pressing it against the holding drum, it is possible to grasp the weft yarn passing between the holding drum and the ring and being directed to the injection nozzle. Features: Weft storage device for threadless looms.