JPH08109546A - Twisting pipe for binding yarn - Google Patents

Abstract

PURPOSE: To provide a rotary pipe for twisting binding yarn useful for yarn end treatment by a fluid jet weaving machine for preventing cutting accident of binding yarn, by stabilizing the opening shape of binding yarn and preventing mistaken gripping of weft end and mistaken cutting. CONSTITUTION: A leaf spring 34 pressed against a yarn pressing face 35 of a flat plate part 33 installed at the yarn induction side of a twisting pipe 21 for passing binding yarn is installed. The binding yarn is passed between the flat plate part 33 and the leaf spring 34. The flat plate part 33 is laid in the direction of the diameter of the twisting pipe 21 and the tip of the flat plate pipe is provided with a yarn induction groove 36 for controlling the introduction position of the binding yarn at the central of the pipe. The leaf spring 34 has preferably a structure in which both ends are held, its middle part is pressed by the yarn pressing face 35 of the flat plate part 33 and is preferably made into a shape furnished with a pressing face 39 at which the leaf spring 34 is brought into contact with the plate part 33 in a range of a ceratin degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rotary pipe for twisting a twine yarn provided in a fluid jet loom for treating a weft yarn end on the side opposite to the weft inserting nozzle.

[0002]

2. Description of the Related Art Various methods have been proposed for the treatment of the weft end on the side of the anti-weft insertion nozzle in a fluid jet loom, but the weft end is entangled in a entangled yarn and then cut off with a cutter. Ejecting is the most common method. The entanglement yarn is opened and closed while being swung left and right between the traverse device provided in the warp shedding device and the twisting device provided on the front side of the loom facing the traverse device, and is driven into the weaving cloth by the back. Capture the tip of the weft. The entangled yarn is twisted by the twisting device after capturing the tip of the weft yarn, and the yarn end after being cut by a cutter arranged between the entangled yarn and the warp yarn is wound around the entangled yarn. It is discharged outside.

The twisting device is equipped with a twisting pipe through which the entangled yarn that is knitted in a single state with the end of the weft yarn being caught is passed, and twisting is given to the entangled yarn by rotating this pipe. As shown in FIG. 6, the conventional twisted pipe has through holes 25 for transmitting the rotation to the entanglement yarn 9,
26 and 27 are provided. These through holes 25, 26, 27
Is provided in a flat plate shape by crushing the pipe 21 from both sides, as shown in FIG. The entangled yarn inserted into the pipe tip 31 is passed through the through holes 25, 26, and 27 in a zigzag manner, and then passes through the pipe 21 and is pulled out from the pipe rear end. By twisting the pipe 21 in this state, the entanglement yarn 9 is twisted.

[0004]

The entangled yarn before being knitted into one in a state in which the yarn end is captured is rubbed by the back and is opened and closed by the opening device, so that the entangled yarn is pulled back in a cycle. Fluctuations in tension occur. Also in FIG.
In the conventional twisted pipe shown in FIG. 7, the through holes 25, 26,
Due to the deviation of the tension applied to the entangled yarn 9 depending on whether the flat plate portion 33 provided with 27 is in the horizontal direction or in the vertical direction, the entangled yarn 9 moves along the peripheral edge of the through hole 25 in FIG.
It swings as shown in. Therefore, the opening point of the entangled yarn 9 (a portion corresponding to the cloth fell) swings back and forth and up and down,
The opening shape of the entanglement becomes unstable, a weft end may be caught incorrectly, or the yarn end may come off the cutter, resulting in a cutting error.
Sometimes the loom was stopped. Further, since the entangled yarn 9 is repeatedly rubbed on the periphery of the through hole 25 of the twisted pipe,
There was also an accident that the entanglement thread was cut.

The present invention stabilizes the opening shape of the entanglement yarn by catching the weft yarn end by obtaining the twisted pipe which can more stably hold the entanglement yarn after the weft yarn end is caught and give twist. The goal is to prevent accidents such as cutting of entangled yarns as well as cutting mistakes.

[0006]

According to the present invention, there is provided a leaf spring 34 which is pressed against the yarn pressing surface 35 of the flat plate portion 33 provided on the tip side (thread introducing side) of the twisted pipe 21 through which the entangled yarn 9 passes. The entangled thread 9 is provided on the flat plate portion 33 and the leaf spring 34.
The above-mentioned problem is solved by passing between and.

The flat plate portion 33 is provided in a diametrical direction that divides the hollow hole of the twisted pipe 21 into two diametrical directions, and a thread introduction groove 36 for restricting the introduction position of the entangled thread 9 at the pipe center is provided at the tip (thread introduction end) thereof. It is provided.

The leaf spring 34 is in the form of a strip and is mounted with its longitudinal direction being the axial direction of the twisted pipe 21. Leaf spring 34
Is preferably structured such that both ends are locked and the intermediate portion thereof is pressed against the thread pressing surface 35 of the flat plate portion 33, and the leaf spring 34 and the flat plate portion 33 are in surface contact with each other within a certain range. It is preferable that the pressure surface 39 is formed.

[0009]

[Function] Entangled yarn 9 which is obtained by capturing the tip of the weft and knitted into one
Is a flat plate portion 33 provided on the yarn introduction side of the twisted pipe 21.
It is introduced into the pipe 21 through a space between the plate spring 34 and the leaf spring 34 which is pressed against it, and pulled out from the rear end of the pipe. When the twisted pipe 21 rotates, the flat plate portion 33 and the leaf spring 34
Also rotates together and twists the entangled yarn 9 sandwiched between the two.

A thread introduction groove 36 provided at the tip of the flat plate portion 33.
Guides the entangled yarn 9 to the axial center of the twisted pipe 21, and prevents the introduction position of the entangled yarn 9 from swinging vertically and horizontally when the twisted pipe 21 rotates. Further, the entangled yarn 9 is sandwiched between the yarn pressing surface of the flat plate portion 33 and the leaf spring 34, so that resistance to axial movement is imparted.

Therefore, the entangled yarn 9 introduced into the twisted pipe of the present invention is stably held regardless of the rotation of the twisted pipe 21 and the change in the tension acting on the entangled yarn 21, and the position and the opening shape of the entangled yarn opening point. Is also held constant. Therefore, mistaking of the tip of the weft thread due to variation of the opening shape of the twine thread is prevented, and cutting error due to displacement of the tip of the weft thread gripped by the twine thread is prevented. Further, the occurrence of yarn breakage due to repeated rubbing of the entangled yarn is also prevented.

The structure in which both ends of the plate spring 34 are locked and the intermediate portion thereof is pressed against the thread pressing surface 35 can stabilize the pressing force of the plate spring 34 and prevent the plate spring 34 from being biased due to twisting or the like. Therefore, it is possible to hold the entangled yarn 9 more stably. Further, the structure in which the leaf spring 34 is brought into surface contact with the flat plate portion 33 is effective for stabilizing the holding of the entangled yarn 9 between the leaf spring 34 and the flat plate portion 33, and is entangled with a relatively small biasing force. The axial movement of the yarn 9 can be effectively prevented.

[0013]

EXAMPLE In FIG. 5, electric contacts 1 and 1 for detecting the front end of the weft thread are provided with their lower ends fixed to a bob frame 2 and rock together with the bob 3. A bracket 5 is provided on the breast beam 4 of the loom so as to be movable and fixed along the breast beam 4, and a locking plate 6 is attached to the end of the bracket on the side of the lever. The locking plate 6 faces the lever 3 at a position between the two electric contacts 1 and 1. The locking plate 6 is arranged between the woven selvage 8 of the woven cloth 7 and the twine thread 9. Further, a cutter 10 for cutting the tip of the weft is attached to the bracket 5 at a position near the weave 8. The weft insertion nozzle is arranged at the left end of the woven fabric 7 (not shown), and the weft yarn 11 passes through the warp opening 12 so that its tip 11a reaches the opening position of the entanglement yarn 9. To be done.

At the position of the bracket 5 opposite to the woven fabric side, a twisted pipe 21 whose tip is directed to the teeth 3 is rotatably supported, and a pulley 22 is fixed to the twisted pipe.
It is adapted to be rotationally driven by a rotational drive device (not shown). The entangled yarn 9a composed of a plurality of yarns is opened and closed in synchronization with the warp yarn by an opening device (not shown). The plurality of entangled yarns 9a capture the weft yarn tip 11a beaten at the position of the opening point 23 located substantially on the extension of the cloth fell 13 of the woven fabric 7, and are knitted into a single yarn in the twisted pipe 21. It passes and is pulled out to the front side of the loom.

1 to 4 are views showing an embodiment of the present invention. As shown in FIGS. 1 to 3, the twisted pipe 21 of the present invention has a strip-shaped flat plate 33 that integrally connects a pipe body 31 and a pipe tip 32, and both ends thereof connected to the pipe body 31 and the pipe tip 32. And a leaf spring 34 that is formed. Both ends of the flat plate 33 are welded to the tip side of the pipe body 31 and the body side of the pipe tip 32 to integrate the pipe body 31 and the pipe tip 32. Flat plate 3
3 is provided in the diameter direction of the pipes 31 and 32.

At the center of the tip of the flat plate 33, there is provided a thread introducing groove 36 which is obliquely cut from one surface (thread holding surface) 35 of the flat plate 33. This thread introducing groove 36 is formed in the pipe 21. It is open to the axis. The leaf spring 34 is biased to the surface 35 of the flat plate 33 on the side where the thread introducing groove 36 is provided.

The leaf spring 34 is formed by bending a strip plate (see FIG. 2) having a wide central portion as shown in FIG.
1 is inserted into the inside of the pipe main body 31, and the tip end 38 side is attached to the pipe tip end 32 (see FIG. 1). The leaf spring 34 is provided with a pressing surface 39 which is in contact with the thread pressing surface 35 of the flat plate 33 at the intermediate portion thereof.

The entangled yarn 9 knitted into one piece on the front side from the opening point 23 shown in FIG. 5 is inserted into the pipe tip 32, passes through the yarn introducing groove 36, and has a flat yarn pressing surface 35 and a leaf spring. It passes between the pressure surface 39 and the pipe body 31.
Is pulled out from the rear end of the pipe.

The leaf spring 34 is detachably attached to the pipe body 31 and the pipe tip 32. By preparing a plurality of leaf springs 34 made of spring plates having different thicknesses,
It is possible to easily adjust the holding force of the entangled yarn 9.

[0020]

According to the twisted pipe of the present invention described above, it is possible to prevent the opening point of the twisted yarn from fluctuating due to the rotation of the twisted pipe and the periodic change in tension acting on the twisted yarn. By stabilizing the opening point and opening shape of the entanglement yarn, it is possible to prevent mistakes in catching the weft ends and mistakes in cutting, and to prevent accidents such as entanglement of the entanglement yarn.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

3 is a front view of FIG.

FIG. 4 is a side view of the leaf spring of FIG.

FIG. 5 is a perspective view of a twisted pipe mounting portion of the loom.

FIG. 6 is a plan view of a conventional twisted pipe.

FIG. 7 is a side view of FIG.

[Explanation of symbols]

 9 Entangled thread 11a Weft thread tip 21 Twisted pipe 34 Leaf spring 35 Thread holding surface 36 Thread introduction groove 39 Pressure surface

Claims (3)

[Claims] Claim: What is claimed is: 1. A twisted yarn twisting pipe of a loom, wherein the twisted yarn twisting pipe of a loom twists by twisting a twisted yarn (9) which is captured by the weft yarn tip (11a) and passes through the twisted yarn (9).
A thread holding surface (35) in the diameter direction of the pipe (21) is formed on the thread introduction side of the twisted pipe (21), and a leaf spring that rotates integrally with the twisted pipe (21) is formed on this thread holding surface (35). (34) is pressed, the entangled yarn (9) passes through the twist pipe (21) through between the yarn pressing surface (35) and the leaf spring (34), Twisted pipe of entangled yarn of a loom. 2. A twisted pipe (21) cut diagonally from the thread pressing surface (35) at the entangled thread introduction end of the thread pressing surface (35).
The twisted pipe according to claim 1, wherein a thread introduction groove (36) opening to the axis of the twisted pipe is formed. 3. The entanglement according to claim 1 or 2, wherein the leaf springs (34) are locked at both ends, and a pressing surface (39) parallel to the thread pressing surface (35) is formed in an intermediate portion thereof. Thread twist pipe.