JPS6118056Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field of the invention This invention completely prevents the terminals of the discharge weft pipe and the end threads of the supply weft pipe, which are cut and removed during pipe change, from being woven into the woven fabric. The present invention relates to a device for preventing weaving of end yarns in a tube changing loom, which has a high removal processing function that allows for high removal processing.

(b) Background of the invention In recent years, this type of device for preventing weaving of end threads has been used to perform pipe change operations corresponding to high-speed operations of looms.

By the way, in this high-speed pipe changing operation, the ends of the discharge weft pipe that is discharged based on the reduction of the remaining yarn and the supply weft pipe that supplies the weft instead of this are cut and removed. To prevent the threads from being woven into the fabric, tension is applied to the end threads during this high-speed pipe change, and the cut end threads are suctioned and removed by separate suction and recovery devices to be woven into the fabric. (For example, the
Publication No. 11480).

However, since these terminals are cut in parallel to each other, they tend to get tangled and when suctioned individually in this tangled state, each tangled end thread is pulled together by an individual suction device, and the end threads are separated. As a result, uncollected end threads were woven into the fabric. As described above, with the current end yarn weaving prevention device, it has not yet been possible to completely prevent end yarn weaving due to high-speed operation.

(c) Purpose of the invention Therefore, the object of this invention is to provide a device for preventing weaving of end threads in a tube change loom, which can fully perform the function of preventing weaving of end threads even when the loom speeds up.

(d) Summary of the invention This invention has a guide surface that guides the end yarn toward the rear end at the front end of the movable guide member that tension-supports the end yarn of the discharge weft pipe when changing the pipe, and also has a guide surface that guides the end yarn toward the rear end side. A locking groove for locking the end yarn is provided on the side, and between this movable guide member and the woven fabric, the end yarn of the discharge weft tube is interlocked with the backward movement of the movable guide member, and the end yarn of the supply weft tube is connected to the movable guide member. The present invention is characterized in that it is a device for preventing weaving of end yarns in a tube changing loom, which is equipped with a fixed guide member having a collection guide path that guides the yarns to separate them from the yarns.

(E) Effect of the invention According to this invention, the movable guide member has a guide surface that locks and guides the end yarn of the discharge weft pipe and a locking groove that locks the guided end yarn. For,
When changing the tube, the end yarn can be securely locked and supported under tension. Moreover, in conjunction with the tension support operation of this end yarn, this end yarn can be guided to the collection guide passage to separate it from the end on the supply weft tube side located parallel to it, so that when changing the tube, Since both end threads are naturally separated and cut in this state, there is no room for these end threads to become entangled, and they are reliably collected into individual suction and collection devices. Therefore, regardless of the high-speed operation of the loom, the separation and collection effect on the end yarns is reliably worked during tube change, and the phenomenon of weaving of the end yarns is completely eliminated.

Furthermore, the front end of the movable guide member can be provided in a T-shape that is effective for locking and guiding the end yarn, thereby making it possible to more reliably guide the yarn to the locking groove.

(F) Embodiment of the invention An embodiment of the invention will be described below in detail based on the drawings.

The drawing shows a pipe changing loom equipped with a device to prevent weaving of end threads. In Fig. 1, 1 is a woven fabric, 2 is a temple cutter, 3 is lace, 4 is a shuttle box on the side of the pipe changing, and 5 is fixed in the shuttle box. 6 is a discharge weft pipe, 7 is a shuttle stopping member, and a device for preventing weaving of end threads, which will be described later, is installed on the pipe changing side of such a loom.

The above-mentioned device for preventing weaving of end threads is the end thread cutter 8.
, a movable guide member 9, and an auxiliary guide member 10.
, a fixed guide member 11 , and a first suction device 12 .

As is well known, the above-mentioned end thread cutter 8 has a function of cutting and gripping the end thread 13 of the discharge weft pipe 6 by moving back and forth at the time of pipe change, and a function of collecting the cut end thread 13. A rotary cutting blade 16 and a rotating gripping blade 18 having a horizontal groove 17 for capturing the weft thread are sandwiched between the fixed cutting blade 14 and the fixed gripping blade 15, and are pressed together with a plate spring 19. A second suction device 20 is also installed in the section.

As shown in FIG. 2, the above-mentioned movable guide member 9 moves back and forth simultaneously with the above-mentioned end thread cutter 8 via a link mechanism (not shown) that is linked to the operation of a crank during pipe change, and is controlled by this back-and-forth movement. Based on this, it provides a tension support effect to the end threads 13 of the discharge weft pipe, and its shape is such that the tip part is T-shaped orthogonal to the end threads 13 in the horizontal direction, and the orthogonal part of the tip is in the front. It is provided in a so-called pickaxe shape with a downward slope, and this inclined surface is provided as a guide surface 21 for locking the end yarn, and a locking groove 22 for locking the end yarn is carved in the upper root portion on the back side. This groove 22 serves to lock the end thread and support it reliably. 23 is a connecting shaft of the link mechanism.

The above-mentioned auxiliary guide member 10 is fixedly disposed in an L-shape at a position corresponding to the side of the above-mentioned movable guide member 9 by a fixing member (not shown), and the end thread 13
A certain tension is applied to the end thread 13 to help ensure that the end thread 13 is taken into the movable guide member 9.

The fixed guide member 11 described above has a separating function to ensure separation of the end thread 13 of the discharge weft pipe and the end thread 24 of the supply weft pipe, and this is shown in FIG. The temple cutter 2 is equipped with one of the existing temple cutters 2, and the outer corner of the temple cutter 2 is partially cut out to form a rectangular shape, and this cutout surface is provided as a recovery guide surface 25. At the back of the temple cutter 25, there is a collection guide passage 2 for the end thread 13 that passes diagonally backward from the front end surface of the temple cutter 2.
6 is provided in communication with the collection guide surface 25 mentioned above.

As is well known, the first suction device 12 is used to temporarily suction and support the end thread 24 of the supply weft pipe 27 at the time of pipe change, and then to collect the end thread 24 by suction. The opening of the suction tube 28 of the first suction device 12 is provided oppositely to the outer side of the suction tube 28 of the first suction device 12 .

During normal weaving, the end thread weaving prevention device configured as described above is in a standby state in which the end thread cutter 8 and the movable guide member 9 are retracted.
When the weft yarn remaining in the shuttle 5 is detected, an electrical pipe change signal is generated, and as shown in Fig. 4, when the shuttle 5 moves to the pipe change side, the link mechanism is activated to cut the end yarn. 8 and the movable guide member 9 are moved forward, and the end thread cutter 8 cuts the weft (end thread 13) near the discharge weft pipe 6 between the fixed cutting blade 14 and the rotating cutting blade 16, and the fixed gripping blade 15 and a rotating gripping blade 18. In synchronization with this cutting and gripping action, the movable guide member 9 moves forward, and the end yarn 13 is pushed by the guide surface 21 and moves toward the back side, where it is locked in the locking groove 22.

Next, as shown in FIG. 5, when the end thread cutter 8 and the movable guide member 9 move backward based on the operation of the link mechanism, the end thread 13 is pulled rearward and tension is applied.

At this time, the inner side of the end thread 13 is fixed guide member 1
It is guided to a collection guide path 26 from the collection guide surface 25 of No. 1 . On the other hand, the shuttle 5 is automatically loaded with a supply weft pipe 27 instead of the discharge weft pipe 6.
The end yarn 24 taken out is suction-supported by the first suction device 12, and in this state, as shown in FIG.
The end yarns 13 and 24 of the book are cut simultaneously by the temple cutter 2, and the end yarn 24 on the supply weft tube side is cut at the same time by the temple cutter 2.
The end yarn 13 on the side of the discharge weft pipe is suctioned and removed by the second suction device 20.

The operation of preventing the end threads 13 and 24 from being woven into the woven fabric 1 is performed, and the pipe changing operation is completed.

In addition, in the above-mentioned embodiment, the fixed guide member 11 was formed as a part of the temple cutter 2, but the structure is not limited to this, and an independent fixed guide member may be provided along with the temple cutter. You may.

(G) Other Examples FIG. 7 shows a movable guide member 29 showing another embodiment of this invention, which is provided with a cutout in the shape of the front face facing inward, and the upper and lower slopes of the movable guide member 29 are used for the end yarn 13. It is provided as a guide surface 30, and a locking groove 31 for locking the end yarn is provided in the inner part of the guide surface in communication with the guide surface 30.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a plan view of the main part showing a device for preventing weaving of the terminal in a tube changing loom. FIG. 2 is a side view showing how the movable guide member and the auxiliary guide member are used. FIG. 3 is a vertical sectional side view of the main part showing the fixed guide member. FIGS. 4 to 6 are plan views of essential parts showing the operating state of the weaving prevention device during pipe change. FIG. 7 is a side view of a main part of a movable guide member showing another embodiment of this invention. 9, 29... Movable guide member, 11... Fixed guide member, 13, 24... End thread, 21, 30...
Guide surface, 22, 31...locking groove, 25...recovery guide surface, 26...recovery guide path.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An end thread cutter that cuts and holds the end thread of the discharge weft pipe to be discharged when changing the pipe, and an end thread cutter that moves back and forth between the end thread cutter and the woven fabric to remove the end thread of the discharge weft pipe. A device for preventing weaving of end yarns in a tube changing loom, which is equipped with a movable guide member that tension-supports the yarn, further comprising a suction device for discharged weft tube end yarns on the movable guide member side of the end yarn cutter. A suction device for the supply weft tube end yarn is disposed at the tube change position, and the movable guide member has a guide surface on the front end portion for guiding the end yarn toward the rear end side, and an end yarn on the rear end side of the guide surface. A locking groove for locking the yarn is provided between the movable guide member and the woven fabric, and the end yarn of the discharge weft tube is separated from the end yarn of the supply weft tube in conjunction with the backward movement of the movable guide member. 1. A device for preventing weaving of end threads in a pipe changing loom, comprising a fixed guide member having a collection guide path for guiding the end threads. 2. The movable guide member has a front end in a T-shape perpendicular to the end yarn of the discharge weft pipe, the front end of the T-shape is sloped forward and downward, the front end surface is provided on the guide surface of the end yarn, and the A device for preventing interweaving with end threads in a tube changing loom according to claim 1, wherein the upper part has a locking groove for locking end threads.