JPS6245012Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a weft storage device for a shuttleless loom that uses fluid to temporarily store weft yarns.

Prior art The weft is pulled out from the weft supply unit provided on the side of the machine base, is placed on the fluid jetted from the storage fluid injection device, and is temporarily stored in an approximately U-shape, and then the weft is inserted into the warp opening. Methods for doing so have been generally known. For example, in the case of the jet room shown in FIG. 1, the weft yarn W pulled out from the weft supply section (not shown) passes through the storage fluid injection device 1,
The fluid ejected from the fluid ejecting device 1 feeds the fluid into the storage section on the storage plate 2 and is drawn out through the fixed guide 3, so that the fluid is stored in a substantially U-shape. The stored weft W passes through a gripper 4 that repeatedly clamps and releases the weft W by moving toward and away from the weft, and is inserted by a weft insertion nozzle 5.

In such a conventional device, when weft insertion is started during operation, the stored weft is pulled out by the propulsive force of the fluid injected from the main weft insertion nozzle. Since the weft yarns are stored under the influence of a fluid thrust in the direction opposite to the direction in which the weft yarns are pulled out, the weft yarns are subjected to large pull-out resistance and have the disadvantage of poor stand-up performance at the beginning of weft insertion. In addition, this delay in start-up time requires a longer weft insertion time, which is an obstacle to increasing the speed and width of the loom.

Purpose This invention was made in order to eliminate the above-mentioned drawbacks of conventional devices, and its purpose is to reduce the pull-out resistance of the weft yarn in the weft storage section during weft insertion, and to shorten the rise time at the start of weft insertion. An object of the present invention is to provide a weft storage device for a shuttleless loom that can be used in a shuttleless loom.

Embodiment An embodiment embodying this invention will be described below with reference to FIG. A weft storage section 11 formed in a box shape (FIG. 2 shows the state with the top wall removed) is provided on the upper surface of a support plate 10 fixed to a machine frame (not shown). A weft storage fluid injection device 12 is disposed on the upper surface of one end of the support plate 10, and its nozzle 13 directs one side wall 14a extending in the width direction of the weft storage section 11 toward the weft draw-out side (the right side in FIG. 2). ) is penetrated near the side wall 15b opposite to the side wall 15a. The support plate 1
On the upper surface of the other end of 0 is the weft storage fluid ejecting device 1.
A fluid ejecting device 16 for ejecting fluid in a direction opposite to the flow of fluid ejected from the weft outlet 2 is disposed, and its nozzle 17 penetrates the other side wall 14b extending in the width direction near the side wall 15a on the weft pull-out side. There is. Both fluid ejection devices 12, 16 are respectively connected to a pressure fluid source (not shown) and are connected to a nozzle 13.
Although the nozzle 17 may always inject the pressure fluid, the nozzle 17 may be configured to be able to adjust the injection timing so that the nozzle 17 injects the pressure fluid only for a necessary predetermined period of time from before the start of weft insertion, for example.

Discharge ports 18 and 19 for discharging the fluid injected from both nozzles 13 and 17 are formed in both side walls 14a and 14b extending in the width direction at positions facing the injection ports of both nozzles 13 and 17, respectively. has been done. Also, the side wall 1 on the weft pull-out side
5a is provided with a fixed guide 20 for pulling out the weft W from the weft storage section 11.

Next, the operation of the weft storage device configured as described above will be explained. Now, the weft W paid out from the weft supply section (not shown) is passed through the yarn guiding hole 12a to the weft storage fluid ejection device 12, and is continuously paid out to the weft storage section 11 by the fluid jetted from the nozzle 13. , fixed guide 20
The material is pulled out through the gripper 21, which repeats opening and clamping in synchronization with the weft insertion timing, and is inserted by a weft insertion nozzle (not shown). During machine operation, when one weft insertion is completed, the gripper 21 grips the weft W, so the nozzle 13
The weft W fed out to the weft storage section 11 is sequentially stored in a U-shape between the fixed guide 20 and the tip of the nozzle 13.

During this time, the let-out side weft W1 is stored in a U-shape while being kept under tension by the fluid jetted from the nozzle 13 of the weft storage jetting device 12.

When a predetermined amount of weft yarn W has been stored, the gripper 21 releases the weft yarn W and the weft insertion is performed by the weft insertion nozzle, but the fluid jetted from the nozzle 17 of the fluid injection device 16 sends out the draw-out side weft W2. As a result, the weft yarn receives a propulsive force in the drawing direction on the W2 side, which cancels out the resistance received by the fluid jetted from the nozzle 13. Therefore, the start-up performance at the start of weft insertion can be improved.

Another Embodiment Next, another embodiment of this invention will be described with reference to FIG. In this embodiment, a separation plate 22 is provided along the central longitudinal direction of the weft storage section 11 to prevent the fluids ejected from the weft storage fluid ejection device 12 and the fluid ejection device 16 from interfering with each other. This embodiment differs from the previous embodiment in that
Therefore, in this embodiment, the fluids ejected from both the fluid ejecting devices 12 and 20 do not interfere with each other, and turbulence does not occur within the weft storage section 11, so that the operation of the embodiment described above is ensured. It is done.

Note that this invention is not limited to the above-mentioned embodiments, and for example, as shown in FIG. A guide member 23 having a curved portion for deflecting the fluid ejected from both nozzles 13, 17 to the outside is provided on the outside of the tips of both nozzles 13, 17 to prevent mutual interference between the ejected fluids. As shown in the figure, the separation plate 22 may be provided at the center of the support plate 10 without side walls, or only the upper and lower walls may be provided, and the shape of each part may be changed without departing from the spirit of this invention. It is also possible to change the configuration etc. arbitrarily.

Effects As detailed above, this invention has a weft storage section that temporarily stores the weft fed from the weft supply section in a U-shape using fluid, and a weft storage section that is located between the weft storage section and the weft insertion mechanism. In a shuttleless loom equipped with a gripper that intermittently pinches the weft yarn, a fluid injection device for weft storage is provided at one end of the weft storage section, and a fluid injection device for weft storage is provided at the other end of the weft storage section, and the other end is provided with a gripper for intermittently holding the weft. In contrast, by providing a fluid ejecting device that injects fluid in the opposite direction to the flow of fluid ejected from the weft storage fluid device, the weft pulling resistance during weft insertion can be reduced, and especially the weft insertion Since the start-up performance at the time of starting can be improved, it is possible to perform stable weft insertion, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing a conventional device, Fig. 2 is a partially omitted perspective view of a weft storage device embodying this invention, Fig. 3 is a partially omitted perspective view showing another embodiment, and Fig. 4 is a partially omitted perspective view showing another embodiment. , 5 is a partially cutaway plan view showing a modified example. 10... Support plate, 11... Weft storage section, 12...
...Fluid ejection device for weft storage, 16...Fluid ejection device, 18, 19...Discharge port, 22...Separation plate.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A weft storage section that temporarily stores the weft fed from the weft supply section in a U-shape using fluid, and a weft storage section that is arranged between the weft storage section and the weft insertion mechanism. In a shuttleless loom equipped with a gripper that intermittently clamps a weft yarn, a fluid injection device for weft storage is provided on one end side of the weft storage section, and
On the other end side, for the drawer side weft at the time of weft insertion,
A weft storage device comprising a fluid ejecting device that ejects fluid in a direction opposite to the flow of fluid ejected from the weft storage fluid device. 2. The utility model registration claim 1 is characterized in that the weft storage section is provided with a separating member that prevents the fluid ejected from the weft storage fluid ejection device and the fluid ejection device from interfering with each other. The weft storage device according to item 1. 3. The utility model registration claim 1, wherein the weft storage section is formed in a box shape, and a discharge port is formed on a wall surface facing the jet ports of both the fluid jet devices, or The weft storage device according to item 2.