JPH0649740A - Device for picking weft into weft inserting nozzle of shuttle-less weaving machine - Google Patents

Abstract

PURPOSE:To make reliable guide operation of weft to a weft inserting nozzle possible by flying weft through a hole of a guide member of ring structure and preventing mistakes of engagement and catch. CONSTITUTION:When end breakage occurs between a weft storage device 1 and a weft inserting nozzle 3 in a shuttle-less weaving machine, the weaving machine is stopped, a weft (w) on a storage drum 11 is in a restricted state by an engaging pin 13 and a yarn guide 12 is suspended at a position approximately opposing to a suction pipe 2. Then the restriction of the weft (w) is released, the weft (w) is flied by the action of jetting air flow through a hole of a ring-shaped or conical balloon breaker 51 having a dented engaging part in a weft threading device 5 and made into a hung state between the yarn guide 12 and the suction pipe 2. Then the balloon breaker 51 is transferred by a given timing in the direction crossing the axial line of the weft inserting nozzle 3 and separating from the suction pipe 2. The weft (w) is guide a to an inlet of the weft inserting nozzle 3, engaged with a V-shaped cut set on the outer periphery of the nozzle and surely introduced into the weft inserting nozzle 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention causes a weft yarn from a weft yarn storage device to fly toward a suction pipe provided in the vicinity of a weft insertion nozzle by the action of a blowing air current, and a weft yarn in a suspended state between the two. The present invention relates to an improvement of a weft threading device for a weft insertion nozzle of a shuttleless loom of a type in which the weft thread is captured by a guide member and guided to the inlet of the weft insertion nozzle, and the weft thread is inserted into the weft insertion nozzle by the action of suction airflow.

[0002]

2. Description of the Related Art In a shuttleless loom, when a weft thread is cut upstream of a weft insertion nozzle, it is necessary to guide the cut weft thread and insert it into the weft insertion nozzle. "Weft threading device" disclosed in Japanese Patent Laid-Open No. 3-104965 is known. The device of the invention of this prior application is of the type described above, and a yarn suction device (suction pipe) is attached to the side of the weft insertion nozzle, and the yarn transport device is provided between the weft yarn storage device and the suction pipe. Member (guide member)
Is provided.

In the above structure, for example, when a weft breakage occurs between the measuring storage device and the weft inserting nozzle,
By operating the pull-back nozzle formed on the guide tube connected to the rotating yarn guide, the pull-back nozzle is operated to generate the air flow in the pull-back direction inside the rotating yarn guide, and the rotating yarn guide is rotated in the opposite direction to the winding direction. By doing so, the weft yarn is discharged through the pullback nozzle, the weft yarn is cut at the tip of the pullback nozzle, and then the weft yarn is directed toward the inlet of the yarn suction pipe through the rotating yarn guide of the length measurement storage device by the action of the blowing airflow. To fly. Then, the weft thread that is suspended between the rotary yarn guide and the thread suction tube is locked and captured by the thread guide member, and the movement guides the weft thread to the inlet of the weft insertion nozzle, and the suction air flow of the weft insertion nozzle. By the action of, it will be inserted into the weft insertion nozzle (will be delivered).

[0004]

By the way, in the case of the weft threading device of the invention of the prior application as described above, the weft thread is delivered to the weft insertion nozzle, particularly in the weft thread catching and delivering operation (guide operation) by the guide member. Lack sex. That is, when the flight path of the weft thread that is stretched between the weft storage device and the suction tube is deviated from the standard setting position, the guide member may fail to catch and capture the weft thread. Further, even when the weft is successfully locked and captured, the weft may come off from the guide member during the movement of the guide member.

An object of the present invention is to ensure the guiding operation of the weft threading device to the weft insertion nozzle of the shuttleless loom.

[0006]

Therefore, according to the present invention, a guide member having a ring-like structure for inserting the flying weft from the weft storage device is used, and this guide is performed by a proper drive mechanism at a predetermined timing. The gist is that the member is moved in a direction intersecting the axis of the weft inserting nozzle.

The term "ring-shaped structure" as used herein means a ring-shaped, cylindrical or conical cylindrical structure. Further, the "predetermined timing" means an appropriate timing after the time point when the weft yarn flying from the weft yarn storage device toward the suction pipe due to the action of the air flow is in a suspended state between them. Further, the "weft insertion nozzle" includes not only the main nozzle but also a nozzle on the upstream side of the double nozzle, for example.

[0008]

Since the weft yarn flying from the weft yarn storage device toward the suction pipe passes through the hole of the guide member, the weft yarn is locked and captured by the guide member regardless of the flight route. Further, since the guide member moves in this state, the weft thread does not come off from the guide member during the movement.

[0009]

1 to 5 show a weft supply system using a first embodiment of the weft threading device of the present invention,
An annular balloon breaker is used as the guide member.

That is, in the standby state shown in FIG.
The weft threading device 5 is provided coaxially with the weft yarn storage device 1 and the weft insertion nozzle 3, and has an annular balloon breaker 51 and an auxiliary nozzle 52 that is open to the weft insertion nozzle 3 side and is provided in the peripheral portion thereof. And have. The entire weft threading device 5 is set so that it can be moved in a direction intersecting the axis of the weft inserting nozzle by being driven by an appropriate drive mechanism (not shown).

A suction pipe 2 is provided near the weft insertion nozzle 3. The suction pipe 2 is arranged such that its suction port is located downstream of the inlet of the weft insertion nozzle 3 in the weft insertion direction.

As shown in FIG. 5, a circular collar 31 is formed on the outer periphery of the inlet of the weft inserting nozzle 3, and a V-shaped notch 32 is preferably formed in the collar 31 toward the center. There is. A cutter 4 is provided between the suction pipe 2 and the weft inserting nozzle 3.

Next, the operation will be described. FIG. 1 shows a state in which weft breakage has occurred between the weft storage device 1 and the weft insertion nozzle 3. When a weft break occurs, an appropriate known sensor (not shown) detects this and outputs a loom stop signal. Then, as shown in the drawing, the yarn guide 12 stops at the rotation position substantially facing the suction port of the suction tube 2. At this time, the storage drum 11 connected to the yarn guide 12
The upper weft W is restrained by the locking pin 13, and its cut end is in a state of hanging from the tip of the storage drum 11. The weft threading device 5 is in a standby state and is coaxial with the weft insertion nozzle 3.

In this state, as shown in FIG.
Moves backward to release the constraint on the weft thread on the storage drum 11. At the same time, due to the action of the air flow blown out by a nozzle (not shown) provided in the weft guide tube connected to the yarn guide 12, the weft yarn in the yarn guide 12 connected to the yarn feeder flows through the hole of the balloon breaker 51 of the weft threading device 5 together with the air flow. Fly through toward the suction tube 2.

At this time point, the suction airflow has already been generated in the suction tube 2, and the weft W flying toward the suction port of the suction tube 2 is captured and sucked into the suction tube 2 by the action of this suction airflow. . Along with this, as shown in FIG. 3, the weft yarns on the storage drum 11 are released and sucked into the suction pipe 2 one after another. At this time, the weft yarn W passes through the hole of the balloon breaker 51 and is stretched between the yarn guide 12 and the suction tube 2.

Then, the balloon breaker 51 of the weft threading device 5 moves in a direction intersecting the axis of the weft insertion nozzle 3 and away from the suction tube 2 by the action of a drive mechanism (not shown). By the movement of the balloon breaker 51, the weft W is guided to the inlet of the weft inserting nozzle 3. At this time, the V-shaped notch 32 (see FIG. 5) of the weft insertion nozzle 3 engages with the weft and positions it to facilitate and guide the weft. However, if the pre-winding is performed immediately after the weft W is laid over the suction tube 2, the weft W is laid between the locking pin 13 and the suction tube 2.

In this state, the cutter 4 cuts the weft yarn between the suction pipe 2 and the weft inserting nozzle 3, and the weft inserting nozzle 3 starts blowing out the air flow. Therefore, the weft yarn in the suction tube 2 is sucked and discharged, and the weft yarn W passing through the balloon breaker 51 is inserted into the weft insertion nozzle 3 by the suction action of the weft insertion nozzle 3. At this time, the air injection nozzle 52 of the weft threading device 5 is located at a position facing the inlet of the weft insertion nozzle 3, and the injection air flow thereof ensures easy insertion of the weft into the weft insertion nozzle 3. After that, the locking pin 13 advances in the weft storage device 1 and the yarn guide 1
By rotating 2 the preliminary winding is performed on the storage drum 11.

6 to 9 show a weft yarn feeding system using the second embodiment of the weft threading device of the present invention, which uses a conical tubular balloon breaker as a guide member.

That is, in the standby state shown in FIG.
The weft threading device 6 is provided coaxially with the weft yarn accumulating device 1 and the weft inserting nozzle 3, and has a conical tubular balloon breaker 61 and an auxiliary nozzle 62 which is open to the weft inserting nozzle 3 side and is provided in the peripheral portion thereof. And have. The entire weft threading device 6 is installed on a rotary shaft 63, and the rotary shaft 63 is driven by an appropriate drive mechanism (not shown) via a link 64, and when driven, the weft yarn storage device 1
It is set so that it can be swung in a direction intersecting with the common axis of the weft insertion nozzle 3.

The structure and arrangement around the suction tube 2 and the weft insertion nozzle 3 are substantially the same as those in the first embodiment.

Next, the operation will be described. FIG. 6 shows a state in which weft breakage has occurred between the weft storage device 1 and the weft insertion nozzle 3. When a weft break occurs, an appropriate known sensor (not shown) detects this and outputs a loom stop signal. Then, as shown in the drawing, the yarn guide 12 stops at the rotation position substantially facing the suction port of the suction tube 2. At this time, the storage drum 11 connected to the yarn guide 12
The upper weft W is restrained by the locking pin 13, and its cut end is in a state of hanging from the tip of the storage drum 11 into the balloon breaker 61 of the weft threading device 6. Further, the weft threading device 5 is in a standby state and is coaxial with the weft yarn storage device 1 and the weft insertion nozzle 3.

In this state, as shown in FIG.
Moves backward to release the constraint on the weft thread on the storage drum 11. At the same time, the weft yarn in the yarn guide 12 connected to the yarn feeder together with the air flow is fed into the central hole of the balloon breaker 61 of the weft threading device 6 by the action of the air flow blown out by a nozzle (not shown) provided in the weft yarn guide tube connected to the yarn guide 12. And flies toward the suction tube 2 through. At this time, the link 64 driven by the action of the drive mechanism moves in the direction of the arrow A, the rotating shaft 63 rotates, and the outlet thereof comes out of the suction pipe 2.
The weft W can be smoothly driven in the direction of.

At this point, the suction airflow has already been generated in the suction tube 2, and the weft W flying toward the suction port of the suction tube 2 is captured and sucked into the suction tube 2 by the action of this suction airflow. . Along with this, as shown in FIG. 7, the weft yarns on the storage drum 11 are released and sucked into the suction pipe 2 one after another. At this time, the weft yarn W passes through the hole of the balloon breaker 61 and is stretched between the yarn guide 12 and the suction tube 2.

Then, the link 64 driven by the action of the drive mechanism moves in the direction of the arrow balloon breaker, and the rotary shaft 63 rotates in the opposite direction to the one shown in FIG. Be oriented towards The movement of the balloon breaker 61 causes the weft W to move the weft insertion nozzle 3
You will be guided to the entrance. At this time, the V-shaped notch 32 (see FIG. 5) of the weft insertion nozzle 3 engages with the weft and positions it to facilitate and guide the weft.

In this state, the cutter 4 cuts the weft yarn between the suction pipe 2 and the weft inserting nozzle 3, and the weft inserting nozzle 3 starts blowing out the air flow. Therefore, the weft yarn in the suction tube 2 is sucked and discharged, and the weft yarn W passing through the balloon breaker 61 is inserted into the weft insertion nozzle 3 by the suction action of the weft insertion nozzle 3. At this time, the air injection nozzle 62 of the weft threading device 6 is located at a position facing the inlet of the weft insertion nozzle 3, and the injection air flow thereof ensures easy insertion of the weft into the weft insertion nozzle 3.

After that, the weft threading device 6 returns to the standby state shown in FIG. 9, the locking pin 13 advances in the weft yarn storage device 1, and the yarn guide 12 rotates to preliminarily wind on the storage drum 11.

FIGS. 10 and 11 show a weft supply system using a third embodiment of the weft threading device of the present invention, which uses a ring as a guide member.

That is, in the standby state shown in FIG. 10, the weft threading device 7 is retracted to a position where it does not interfere with weft insertion, and a part of the ring 71 has a convex weft engaging portion 72. Are formed. In addition, the suction tube 2 has a slit 21 extending in the longitudinal direction on the side facing the weft insertion nozzle 3.
Are formed.

At the time of delivering the weft, the weft threading device 7 is driven so that its center hole is located at a position including a straight line connecting the yarn guide 12 and the suction tube 2. In this state, the weft W is engaged with the locking portion 72 of the ring 71 from the yarn guide 12 of the weft storage device (not shown) and is sucked into the suction tube 2 through the slit 21. The other operation configuration is the same as that of the above-mentioned embodiment. However, in the case of this embodiment, since the longitudinal slit 21 is formed in the suction pipe 2, the positional relationship between the inlet of the suction pipe 2 and the inlet of the weft insertion nozzle 3 in the weft insertion direction can be freely set. It is possible.

[0030]

Since the guide member has a ring-shaped structure and the weft is made to fly through the hole, mistakes in catching and locking the weft are eliminated, and the guide operation of the weft is ensured.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a weft supply system using an example of the weft threading device of the present invention.

FIG. 2 is a partial sectional side view showing the operation.

FIG. 3 is a partial cross-sectional side view showing the operation.

FIG. 4 is a partial sectional side view showing the operation.

FIG. 5 is a perspective view showing an example of a weft inserting nozzle used in the weft supplying system.

FIG. 6 is a partial cross-sectional side view showing a weft supply system using another example of the weft threading device of the present invention.

FIG. 7 is a partial sectional side view showing the operation.

FIG. 8 is a partial sectional side view showing the operation.

FIG. 9 is a side view showing the operation.

FIG. 10 is a perspective view showing a main part of a weft yarn feeding system using still another example of the weft threading device of the present invention.

FIG. 11 is a perspective view showing the operation.

[Explanation of symbols]

 1 Weft Storage Device 11 Storage Drum 12 Yarn Guide 13 Locking Pin 2 Suction Tube 21 Slit 3 Weft Inserting Nozzle 32 V-shaped Notch 4 Cutter 5 Weft Threading Device 51 Circular Balloon Breaker 52 Auxiliary Air Injection Nozzle 6 Weft Threading Device 61 Cone Cylindrical balloon breaker 62 Auxiliary air injection nozzle 63 Rotating shaft 7 Weft threading device 71 Ring 72 Weft locking part

Claims (8)

[Claims] 1. A weft yarn from a weft yarn storage device is caused to fly toward a suction pipe provided in the vicinity of a weft insertion nozzle by the action of a blowing air current, and a weft yarn in a suspended state between the two is captured by a guide member. A guide member having a ring-shaped structure for guiding the weft thread from the weft accumulating device into a weft insertion nozzle, and guiding the weft thread through the weft insertion nozzle by the action of suction airflow. A weft threading device for a weft insertion nozzle of a shuttleless loom, comprising: a drive mechanism for moving a member in a direction intersecting an axis of the weft insertion nozzle at a predetermined timing. 2. The device according to claim 1, wherein the guide member is an annular balloon breaker. 3. The device according to claim 1, wherein the guide member is a conical cylindrical balloon breaker. 4. The apparatus according to claim 2 or 3, wherein an auxiliary air injection nozzle opening to the weft insertion nozzle side is provided at the peripheral portion of the balloon breaker. 5. The apparatus of claim 1, wherein the guide member is a ring. 6. The device according to claim 5, wherein a convex weft engaging portion is formed on a part of the ring. 7. The apparatus according to claim 1, wherein a notch for catching the weft thread is formed on the outer circumference of the inlet of the weft insertion nozzle. 8. The apparatus according to claim 1, wherein a longitudinal slit is formed on the side of the suction tube facing the weft inserting nozzle.