JPS62199849A - Weft yarn storage apparatus in shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a weft storage device for temporarily storing weft yarns using fluid in a shuttleless wAa.

[Prior Art] For example, in a shuttleless loom that inserts weft yarn using a fluid injection nozzle for weft insertion (hereinafter referred to as a weft insertion nozzle), in order to perform weft insertion smoothly, it is necessary to It is common practice to store a predetermined amount of weft yarn prior to weft insertion, and at the time of weft insertion, release the stored weft yarn all at once and jet it along with fluid from a weft insertion nozzle to insert it into the warp opening. Various types of weft storage devices are used.

In the present invention, in such a weft storage device, the weft drawn out from the weft supply bobbin (weft supply section) is ejected by a storage fluid injection nozzle (hereinafter referred to as storage nozzle), so that the weft can be sprayed onto a flat surface of the weft storage plate. This relates to a weft storage device that stores weft yarns in a U-shape between a storage nozzle and a guide in a storage area ball, and the stored weft yarns are inserted through this guide and the aforementioned weft insertion and gripper. It is sprayed from the nozzle.

In such a weft storage device, if the machine stops due to a weft insertion error, warp thread breakage, etc. during operation, or if the machine is stopped as necessary, the timing for stopping the w & machine is Since this is set to occur before the start of weft insertion, the weft remains stored in a U-shape on the storage board.

Further, although the storage nozzle is operating, the gripper is in a state of gripping the weft yarn. Therefore, among the U-shaped wefts on the storage plate, the weft portion on the payout side from the weft supply bobbin is under tension due to the fluid jetted from the storage nozzle, but the weft portion on the withdrawal or withdrawal side is under tension. It is in a virtually tension-free state without any restraints. As a result, the draw-out side weft becomes entangled with the pay-out side weft due to its strong untwisting action, causing twisting as shown in Figure 5.6 In the figure, 1 is the storage nozzle, and 2 is the storage plate. (weft storage section), 3 is a guide, 4 is a gripper, 5
is a weft insertion nozzle (weft insertion means), Y is a weft, Yl is a weft portion on the rope-out side, and Yl is a weft portion on the draw-out side.

If the machine is restarted with such a twist in the stored weft yarn, the twisted portion will pass through the gripper 4 almost intact and reach the weft insertion nozzle 5. Even if the weft insertion nozzle 5 is not clogged, the twisted portion may enter the fabric and cause fabric defects.

Therefore, in order to prevent the occurrence of such twisting, Japanese Patent Publication No. 59-20781 discloses that, among the weft yarns stored in a U-shape on the storage plate, auxiliary fluid is A weft storage device is disclosed that includes a fluid ejection device that ejects air from an injection port.

[Problems to be Solved by the Invention] However, since the fluid jetted from the auxiliary fluid jetting port gradually diffuses, simply jetting the fluid does not lift the weft yarn portion on the drawer side sufficiently from the storage plate, resulting in twisting. The action of the auxiliary fluid does not reach the affected area sufficiently, especially when
In the case of highly twisted weft yarns, the expected twist prevention effect could not be obtained, leading to the possibility of weft insertion errors and fabric defects.

In addition, the weft storage device described in Japanese Patent Publication No. 59-20781 stops spraying the auxiliary fluid when the gripper is opened in order to reduce the pulling resistance of the weft.
In the case of a finder, after a weft insertion error occurs, twisting occurs when the erroneous weft is removed, for example, when the machine is turned 180°.

Therefore, a main object of the present invention is to provide a weft storage device for a shuttleless loom in which the stored weft does not twist.

[Means for Solving the Problems] For this purpose, the present invention includes a gripper that intermittently clamps the weft yarn from the weft supply section after passing through a guide, and when the gripper is opened, the weft yarn is inserted by a weft insertion means. Without a shuttle g&
The weft storage device in the machine includes a weft storage section provided on the upstream side of the guide with respect to the weft traveling direction, and a weft yarn feeding section that feeds out the weft yarn and deposits the weft yarn on the weft storage section.
A storage fluid ejecting device that injects fluid to be stored in a letter shape, and an auxiliary fluid ejecting device having a nozzle that opens toward a drawer side weft portion from the guide among the U-shaped wefts, The axis of the nozzle is located below the axis of the guide in a weft storage device in a shuttleless loom.

Since the axis of the nozzle of the auxiliary fluid ejecting device is located below the axis of the guide, even if the fluid from the nozzle is diffused, the diffusion fluid causes an upward flow of the weft yarn on the drawing side pulled out from the guide. The force acts, and the weft yarn portion on the pull-out side tries to separate from the weft yarn storage section. Therefore, sufficient tension is applied to the weft yarn portion on the drawing-out side, and twisting does not occur between the weft yarn portion on the drawing-out side.

[Embodiments] Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals indicate the same or corresponding parts.

1 to 3 show a first preferred embodiment of the present invention, in which a storage fluid ejecting device 1 is provided on a storage plate 2 constituting a weft storage section, and the nozzle 6 is connected to the storage plate 2. It passes through a frame 7 fixed to the frame 7 and opens toward the weft storage section. Further, the storage fluid injection device 1 is connected to a pressure fluid source (not shown) through a pipe 11, and constantly injects pressure fluid from the nozzle 6. A blind hole 8 for fluid distribution is drilled in the frame 7, which is sealed by a screw 9.

In addition, the distribution hole 8 is provided with two openings in the weft storage section so as to apply a predetermined tension particularly to the draw-out side weft Y2.
A second auxiliary nozzle 10.10a is connected to form an auxiliary fluid injection device. Although the auxiliary nozzles 10 are arranged at three locations, they can be changed as necessary, and the same applies to the auxiliary nozzles 10a. Small weft passage (
A guide 3 with a auxiliary fluid guide plate 3a (not shown) is attached to the auxiliary fluid guide plate 3a.

This guide plate 3a is curved in a substantially figure-5 shape and extends generally in the flow direction of the injection fluid from the auxiliary nozzle Ion of the auxiliary fluid injection device, and in particular, the auxiliary nozzle 10.
The jetted fluid from a is guided in the direction of the arrow to eliminate the possibility that the jetted fluid may have an adverse effect on the weft yarn Y2 on the drawing side.

In particular, as can be seen from FIGS. 2 and 3, the auxiliary nozzle 10 is provided according to the invention, while the height level of its axis is approximately the same as that of the guide 3 and the nozzle 6. The axis of the auxiliary nozzle 1011 is located slightly below the auxiliary nozzle 10, that is, substantially below the axis level of the guide 3, and is inclined with respect to the axis of the auxiliary nozzle 10 as seen in FIG. 3a
extends along. In a preferred embodiment, the @ line of the auxiliary nozzle 10a is horizontal as seen in FIG. This is because it is preferable to do so, and it is not necessary.

On the other hand, the gripper 4 that grips the weft yarn that passes through the guide 3 provided during the weft storage operation and continues to the weft injection nozzle 5, which is the weft insertion means, is a well-known gripper such as that disclosed in the above-mentioned Japanese Patent Publication No. 59-20781. It may have a configuration having a supply port 27 communicating with a pressure fluid source and a fluid discharge port 28, and when the gripper 4 is open to allow the weft to fly, the supply port 2f and the discharge port 28 are connected. It has a structure that cuts off communication.

The distribution hole 8 of the auxiliary fluid injection device is connected to the discharge port 28 of the gripper 4 via a pipe 31, a needle valve 32, and a pipe 33, and the fluid flowing out from the discharge port 28 is adjusted in flow rate by the needle valve 32. , is injected from the auxiliary nozzle 10.10a through the distribution hole 8.

With the above configuration, when the auxiliary fluid is injected from the auxiliary nozzles 10 and 10a, the weft Y2 on the drawer side, which would otherwise tend to fall downward due to its own weight, will be affected by the fluid ejected from the three auxiliary nozzles 10. The auxiliary nozzle 10a is arranged in such a way that its axis lies below the axis of the guide 3 and the jetted fluid is preferably directed upwardly in the direction of the guide plate 3a. Since the fluid jetted from the auxiliary nozzle 10a exerts an upward flow force on the weft portion Y2 on the drawer side, the weft yarn portion Y2 on the drawer side is
It is guided by an auxiliary flow generated by the cooperation between n and the guide plate 3a, and tension is applied while maintaining a stable posture.

Moreover, since the tension in the direction of separating the drawing-side weft Y2 from the feeding-side weft Yl is applied more effectively to the drawing-side yarn Y2, the drawing-side weft Y2 is applied during the weft storage action.
It is possible to prevent the twisting phenomenon that occurs due to untwisting and the like.

In addition, as in the embodiment, since the guide plate 3m is arranged so that the part closer to the tip thereof is further away from the weft Y1 on the weeding side, the tension in the direction of separating the weft Y1 on the weeding side and the weft Y2 on the pulling side is reduced. It gets bigger and bigger. In order to further increase this tension, in addition to arranging the guide plate 3a as described above, it is preferable to increase the distance between the guide 3 and the nozzle 6 as much as possible.

FIG. 4 shows a second embodiment of the present invention, which differs from the first embodiment in that a throttle valve 51 is provided in a pipe 48 led out from a pipe 11 communicating with the storage fluid injection device 1, and an auxiliary A similar throttle valve 49 is provided in a pipe 49 led out from a pipe 32 communicating with the fluid injection device, and a solenoid valve 50 is connected to these throttle valves 48 and 49. The electromagnetic valve 50 is operated and kept open only when the loom is stopped, and is not operated and kept closed when the loom is in operation. Therefore, during operation of the loom, the fluid shown by arrows A and B is supplied to the storage fluid injection device 1 and the auxiliary fluid injection device, as in the first embodiment, and tension is applied to the payout side line yarn Y1 and the drawer side line yarn Y2. Granted. On the other hand, when the loom is stopped, fluids A and B
and the fluid supplied through the solenoid valve 50 in the open state and the throttle valves 48 and 49, the weft yarn Y1. Tension is applied to Y2.

While the loom is in operation, the time required to balance the tension between the wefts Y1 and Y2 is very short, so the flow rate of the fluid is set to a small amount in order to reduce the fluid consumption power, but when the loom is stopped Since the above-mentioned time will be longer, it is necessary to increase the flow rate from the auxiliary nozzle 10.10a.
Therefore, the throttle valves 51 and 52 are arranged, and the tension of the storage fluid injection device 1 is not stabilized.
And the flow rate of the fluid supplied to the auxiliary fluid injection device is determined by the weft Y
1. Control so that the tension of Y2 is balanced.

[Effects of the Invention] As described above, according to the present invention, the auxiliary fluid injection device: I'
Since the axis of the auxiliary nozzle of J' is below the axis of the guide, sufficient tension acts on the weft Y2 on the pull-out side.
No twisting occurs at the connection to the feeding side.

In addition, the effect of preventing twisting can be achieved by setting the axis of the auxiliary nozzle upward as in the preferred embodiment, or by attaching a U-shaped guide plate to the guide in an inclined manner and moving the auxiliary nozzle from the auxiliary nozzle almost along this guide plate. This becomes even more noticeable by injecting a fluid.

Furthermore, as in the preferred embodiment, by associating the storage fluid injection device and the auxiliary fluid injection device with a solenoid valve and a two-throttle valve that operate while the loom is stopped, there is no leakage from each fluid injection device even when the loom is stopped. The fluid jet can be set to a weft stability state different from that during operation, and the drawn side line yarn can be stabilized.

[Brief explanation of drawings]

FIG. 1 is a plan view of a first embodiment of the weft storage device according to the present invention, and FIG. 211 shows a part of the weft storage device in FIG.
FIG. 3 is a side view of the weft storage device shown in FIG. The plan view of the embodiment, FIG. 5, is a plan view of a conventional weft storage device for explaining the situation in which twist occurs in the weft. Weft storage section) 3...Guide 4...Gripper 5...
Weft insertion nozzle (weft insertion means) 10a... nozzle
Y...Weft Y1...Feeding side weft portion Y2...Drawing side weft portion

Claims (1)

[Claims] A weft storage device for a shuttleless loom, which includes a gripper that intermittently pinches a weft from a weft supply section that has passed through a guide, and inserts the weft by a weft insertion means when the gripper is opened, with respect to the traveling direction of the weft. a weft storage section provided on the upstream side of the guide; a storage fluid ejecting device that injects fluid to feed out the weft from the weft supply section and store it in a U-shape on the weft storage section; and the U-shape. an auxiliary fluid injection device having a nozzle that opens toward a part of the weft on the pull-out side from the guide, the axis of the nozzle being located below the axis of the guide. Weft storage device.