JPH0762291B2 - Weft storage device for shuttleless loom - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

TECHNICAL FIELD The present invention relates to a weft storage device for temporarily storing wefts using a fluid in a shuttleless loom.

[Prior art]

For example, in a shuttleless loom of a type in which a weft inserting fluid jet nozzle (hereinafter referred to as a weft inserting nozzle) is used for weft insertion, in order to smoothly perform the weft insertion, the weft insertion is performed before the weft insertion. It is common to store a certain amount of wefts, discharge the stored wefts all at once at the time of weft insertion, and jet them together with the fluid from the weft insertion nozzle to insert them into the warp opening. A storage device is used. According to the present invention, in such a weft storage device, a weft yarn drawn from a weft supply bobbin (weft supply portion) is jetted by a storage fluid jet nozzle (hereinafter referred to as a storage nozzle) to flatten the weft storage plate. The present invention relates to a weft yarn storage device of a U-shaped type that is stored in a storage region between the storage nozzle and a guide, and the stored weft yarn is stored in the gripper between the guide and the weft insertion nozzle described above. When opening the
It is jetted from a weft inserting nozzle via a guide and a gripper. In such a weft storage device, when the weaving machine is stopped due to a weft insertion error, warp breakage, or the like during operation, or when the machine frame is stopped as necessary, the weaving machine is stopped at the weft insertion time. Since the setting is made before the start, the weft yarns remain in the U-shape stored on the storage plate. The storage nozzle is operating, but the gripper is in a state of gripping the weft. Therefore, of the U-shaped wefts on the storage plate, the weft portion on the side of delivery from the weft supply bobbin is under tension due to the tension of the fluid jetted from the storage nozzle, but the weft portion on the side of withdrawal or withdrawal. Is in a substantially tension-free state without any restraint. As a result, the pull-out side weft is entangled with the pay-out side weft due to its strong untwisting action and twists as shown in FIG. In the figure, 1 is a storage nozzle, 2 is a storage plate (weft storage portion), 3 is a guide, 4 is a gripper, 5
Is a weft insertion nozzle (weft insertion means), Y is a weft, Y1 is a payout side weft, and Y2 is a pullout side weft. If the machine frame is restarted while such a twist is generated in the weft during storage, the twisted portion passes through the gripper 4 and reaches the weft insertion nozzle 5 with the twisted portion being almost the same. May cause a weft insertion error,
Even if the weft insertion nozzle 5 is not clogged, the twisted portion may enter the fabric and cause a fabric defect. Therefore, in order to prevent the occurrence of such twisting, Japanese Patent Publication No. 59-20781 discloses a weft yarn stored in a U-shape on a storage plate toward the pull-out side weft yarn portion. Disclosed is a weft yarn storage device including a fluid ejection device that ejects air from an ejection port.

[Problems to be Solved by the Invention]

However, since the fluid ejected from the auxiliary fluid ejection port gradually diffuses, the ejection side weft portion cannot be sufficiently lifted from the reservoir plate by simply ejecting it, so that the action of the auxiliary fluid is sufficient to the portion where the twist occurs. In particular,
In the case of a highly twisted weft, the expected twisting prevention effect could not be obtained, which could lead to weft insertion errors and fabric defects. Further, the weft storage device described in Japanese Patent Publication No. 59-20781 described above stops the injection of the auxiliary fluid when the gripper is opened to reduce the pull-out resistance of the weft, so if the loom is equipped with a pick finder, weft insertion error will occur. After occurrence, for example, machine base 18
Twist occurs when removing the miss weft at 0 °. Therefore, the main object of the present invention is to provide a weft storage device in a shuttleless loom in which the stored weft is not twisted.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, there is provided a gripper for intermittently sandwiching a weft from a weft supply portion that has passed through a guide, and a shuttle for inserting the weft by a weft inserting means when the gripper is opened. The weft storage device in the loom comprises a weft storage portion that is directed toward the upstream side of the guide with respect to the traveling direction of the weft, and a fluid that is fed out from the weft supply portion and stored in a U shape on the weft storage portion. A storage fluid jetting device for jetting, an auxiliary fluid jetting device having an auxiliary nozzle that opens toward the pull-out side weft of the U-shaped weft, and a U-shaped region from the region including the guide. An auxiliary fluid guide plate extending substantially along the pull-out side weft portion of the weft yarn, and the axis of the nozzle of the auxiliary nozzle near the guide is inclined toward the auxiliary fluid guide plate side. , As located below the axis of the guide, it is characterized in that it is arranged.

[Action]

Of the auxiliary nozzles of the auxiliary fluid ejecting apparatus, the axis of the nozzle closer to the guide is below the axis of the guide and is inclined toward the auxiliary fluid guide plate, so that even if the fluid from the auxiliary nozzle diffuses. The upward fluid force acts on the weft yarn portion on the pull-out side pulled out from the guide by the diffusion fluid, and the weft yarn portion on the pull-out side tends to separate from the weft yarn storage portion. Therefore, sufficient tension acts on the weft portion on the pull-out side, and twisting does not occur between the weft portion on the delivery side from the storage fluid ejecting device.

【Example】

Next, a preferred embodiment 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 preferred first embodiment of the present invention, in which a storage fluid ejecting device 1 is provided on a storage plate 2 constituting a weft storage portion, and a nozzle 6 of the storage fluid ejecting device 1 is provided. It penetrates through the frame 7 fixed to and is opened toward the weft storage portion. Further, the storage fluid ejecting apparatus 1 is connected to a pressure fluid source (not shown) by a pipe 11 and constantly ejects the pressure fluid from the nozzle 6. The frame 7 is provided with blind holes 8 for fluid distribution sealed by screws 9. Further, two kinds of auxiliary nozzles 10 and 10a which are opened in the weft storage portion are connected to the distribution hole 8 so as to apply a predetermined tension to the pull-out side weft Y2, thereby forming an auxiliary fluid ejection device. ing. Although the auxiliary nozzles 10 are arranged at three locations, they can be changed as needed, and the auxiliary nozzle 10a is also the same. Small weft path (not shown)
The guide 3 having is attached to the auxiliary fluid guide plate 3a. Thus, the auxiliary fluid guide plate 3a extending from the region including the guide 3 is curved in a substantially J-shape and is generally inclined with respect to the axis of the auxiliary nozzle 10 of the auxiliary fluid ejecting device, as described later. It extends in the flow direction of the jet fluid from 10a (in other words, it extends almost along the weft yarn Y2 on the pull-out side from the guide 3), and particularly the jet fluid from the auxiliary nozzle 10a near the guide 3 is indicated by the arrow. Thus, the possibility that the jetted fluid may adversely affect the weft yarn Y2 on the pull-out side is eliminated. In particular, as can be seen from FIGS. 2 and 3, the auxiliary nozzle 10 is provided according to the invention, whereas the height level of its axis is substantially the same as that of the guide 3 and the nozzle 6. The axis of the auxiliary nozzle 10a is
A little below 0, that is, substantially below the axial level of the guide 3, and as seen in FIG.
It extends substantially along the auxiliary fluid guide plate 3a while inclining to the auxiliary fluid guide plate 3a side with respect to the axis. In the preferred embodiment, the axis of the auxiliary nozzle 10a is horizontal as seen in FIG. 2, but slightly upward is more preferred. On the other hand, a gripper 4 for holding a weft thread connected to a weft injection nozzle 5 serving as a weft inserting means via a guide 3 provided in the vicinity of the weft storage section is well known as disclosed in Japanese Patent Publication No. 59-20781. It may have a configuration, and has a supply port 27 communicating with a pressure fluid source and a fluid discharge port 28, and the supply 27 and the discharge port 28 when the gripper 4 is open to allow the weft to fly.
It has a structure that disconnects communication with. The distribution hole 8 of the auxiliary fluid ejecting device is a discharge port of the gripper 4.
The fluid flowing out from the discharge port 28 is connected to the pipe 28 through the pipe 31, the needle valve 32, and the pipe 33, and the flow rate of the fluid is adjusted by the needle valve 32.
It is jetted from 10a. Since it is configured as described above, the auxiliary nozzles 10 and 10
When the auxiliary fluid is jetted from a, the weft yarn Y2 on the pull-out side, which originally tries to fall downward by its own weight, is the three auxiliary nozzles 10
Is not only tensioned by the jet fluid from
The axis of the auxiliary nozzle 10a near the guide 3 is the guide 3
Is arranged so as to be below the axis of the auxiliary fluid guide plate 3a, and the injection fluid from the auxiliary nozzle 10a is drawn out from the weft yarn portion Y2.
Therefore, the weft yarn portion Y2 on the pull-out side is guided by the auxiliary flow generated by the cooperative action of the auxiliary nozzle 10a and the auxiliary fluid guide plate 3a thus arranged, and the stable posture is maintained. Is given tension. Moreover, the weft on the drawer side
Tension in the direction of separating from the payout side weft Y1 acts on Y2 more effectively, so that the twisting phenomenon caused by the untwisting of the pullout side weft Y2 during the weft storage operation is prevented. Can be prevented. Further, as in the embodiment, since the auxiliary fluid guide plate 3a is arranged so as to be farther from the weft yarn Y1 on the payout side in a portion closer to the tip thereof, the auxiliary fluid guide plate 3a can be separated from the weft yarn Y1 on the payout side and the weft yarn Y2 on the drawing side. Tension increases. In order to further increase this tension, in addition to disposing the auxiliary fluid guide plate 3a as described above, it is advisable 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. The difference from the first embodiment is that a pipe communicating with the storage fluid ejecting apparatus 1 is provided.
The pipe 48 derived from 11 is provided with a throttle valve 51, the pipe 49 derived from the pipe 32 communicating with the auxiliary fluid injection device is provided with a similar throttle valve 52, and these throttle valves 51, 52 are also provided.
The solenoid valve 50 is connected to. The solenoid valve 50 operates only when the loom is stopped and is maintained in the open state, and does not operate during the loom operation and is in the closed state. Therefore, during operation of the loom, as in the first embodiment, the fluids indicated by the arrows A and B are supplied to the storage fluid ejecting apparatus 1 and the auxiliary fluid ejecting apparatus, and the payout side wefts are fed.
Tension is applied to Y1 and the pull-out side weft Y2. On the other hand, when the loom is stopped, the weft yarns are fed by the fluids A and B and the fluid supplied through the open solenoid valve 50 and the throttle valves 51 and 52.
Tension is applied to Y1 and Y2. Since the time required to balance the tensions of the wefts Y1 and Y2 is extremely short during the operation of the loom, the flow rate of the fluid is small and it is set low to reduce the power consumption of the fluid. Since the above-mentioned time becomes longer, the auxiliary nozzle 1
Unless the flow rate from 0 and 10a is increased, the tensions of the wefts Y1 and Y2 will not be balanced and will not be stable. Therefore, the throttle valves 51 and 52 are arranged to control the flow rate of the fluid supplied to the storage fluid ejecting apparatus 1 and the auxiliary fluid ejecting apparatus so that the tensions of the wefts Y1 and Y2 are balanced.

【The invention's effect】

As described above, according to the present invention, the axis of the nozzle of the auxiliary nozzle of the auxiliary fluid ejecting device, which is closer to the guide, is lower than the axis of the guide and is inclined toward the auxiliary fluid guide plate side. Sufficient tension works on the side weft Y2,
It is possible to effectively prevent the occurrence of twist in the connection portion with the feeding side. Further, as in the preferred embodiment, by associating the storage fluid ejecting apparatus and the auxiliary fluid ejecting apparatus with the electromagnetic valve and the throttle valve that operate while the loom is stopped, even when the loom is stopped,
The fluid ejection from each fluid ejection device can be set to a weft stable state different from that during operation, and the pull-out side weft can be stabilized.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of a weft yarn storage device according to the present invention, FIG. 2 is a side view of a portion of the weft yarn storage device of FIG. 1 seen from the direction of line II, and FIG. 1 is a side view of the weft storage device of FIG. 1 seen from the direction of line III in FIG. 1, FIG. 4 is a plan view of a second embodiment of the weft storage device of the present invention, and FIG. It is a top view of the conventional weft storage device for demonstrating the situation where a twist arises. 1 ... Storage fluid injection device, 2 ... Storage plate (weft storage part), 3 ... Guide, 3a ... Auxiliary fluid guide plate, 4 ... Gripper, 5 ... Weft insertion nozzle (weft insertion means), 10, 10a
…… Auxiliary nozzle, Y …… Weft, Y1 …… Feed side weft (Feed side weft part), Y2 …… Drawer side weft (Drawer side weft part)

Claims (1)

[Claims] 1. A weft storage device in a shuttleless loom, comprising a gripper for intermittently sandwiching a weft from a weft supply section that has passed through a guide, and inserting the weft by a weft inserting means when the gripper is opened. A weft storage portion that is directed toward the upstream side of the guide with respect to the traveling direction of the weft, and a storage fluid ejecting device that delivers the weft from the weft supply portion and injects the fluid so as to be stored in a U shape on the weft storage portion. And an auxiliary fluid ejecting apparatus having an auxiliary nozzle that opens toward the pull-out side weft portion of the U-shaped weft yarn from the guide,
An auxiliary fluid guide plate extending substantially along the pull-out side weft portion of the U-shaped weft from a region including the guide, and the axis line of the nozzle of the auxiliary nozzle near the guide is the auxiliary fluid guide plate. A weft storage device in a shuttleless loom, which is arranged so as to incline to the side and be positioned below the axis of the guide.