JP3460205B2 - Defective yarn removing device in fluid jet loom - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing defective yarn from the front of a woven fabric when a weft insertion defect occurs in a fluid jet loom.

[0002]

2. Description of the Related Art In this type of defective yarn removing device, when a weft insertion defect occurs, the defective yarn is prevented from being cut by a yarn feeding cutter, and a winder moves from a standby position to a defective yarn catching position. There is a system in which, after catching the defective yarn connected to the nozzle, the defective yarn is moved to a winding position and the defective yarn is wound.

In Japanese Patent Laid-Open No. 11-107133, when winding a defective yarn, the completion of winding is detected by detecting the presence or absence of the defective yarn between the winder and the weft insertion side woven fabric edge. It is described to detect.

According to the technique disclosed in the above publication, the winding device moves between the catching position and the winding position. Therefore, a detector for detecting the presence or absence of defective yarn is provided outside the moving range of the winding device. To be Therefore, the detector has no choice but to detect the defective yarn from a position distant from the yarn path, and it is extremely difficult to accurately detect the defective yarn which is constantly wound while being shaken by the airflow flowing around.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable a defective yarn removing device to reliably detect a defective yarn by a defective yarn detector.

[0006]

The present invention is based on the following defective yarn removing device in a fluid jet loom. The defective yarn removing device has a winder that captures and winds the defective yarn, and a detector that detects the defective yarn, and when a weft insertion defect occurs,
By avoiding the cutting of the defective yarn by the yarn feeding cutter, the weft on the main nozzle side for weft insertion and the defective yarn are connected, and the winder is moved to the catching position near the main nozzle to remove the defective yarn. After capturing, the winder is moved to the winding position, and the defective yarn in a state of being cut from the weft yarn on the main nozzle side is extracted from the woven fabric by the winder.

According to another aspect of the present invention, there is provided a defective yarn removing device for a fluid ejecting loom, wherein the detector has a pair of guide walls that spread toward the tip of the detector, and the pair of guide walls are located in the direction of convergence. And the vicinity of this detection wall as the detection area of the detector, the detector is directed toward the defective yarn connected between the winder and the weft inserting side woven edge of the woven fabric. By advancing, the defective yarn is caused to pass between a pair of guide walls, abut against the detection wall, and the defective yarn is positioned in the detection region.

According to a second aspect of the present invention, there is provided a defective yarn removing device for a fluid jet loom, wherein the rotary shaft provided above the main nozzle rotates the winder from the catch position to the wind position. In a defective yarn removing device in a fluid jet type loom to be moved by moving the winder and the detector integrally with each other, the winder and the winder are rotated together with the winder to rotate to a winding position. It is characterized in that the detector is advanced toward the defective yarn connected to the weft inserting side woven edge of the woven fabric, and the defective yarn is brought into contact with the detection wall of the detector.

According to a third aspect of the present invention, there is provided a defective yarn removing device for a fluid jet loom according to the first or second aspect, in which the defective yarn is blown upward by the jet air flow to prevent the defective yarn from being cut by the yarn feeding cutter. In the defective yarn removing device for a fluid jet loom, a guide plate for bending the jetted air flow from below obliquely upward is provided on at least one side surface of the detector, and the defective yarn blown up is guided along the guide plate. The feature is that it guides diagonally upward.

The defective yarn removing device in the fluid jet loom according to claim 4 is claim 1, claim 2 or claim 3.
Then, the detector is provided with a detection yarn positioning member, and the defective yarn is brought into contact with a predetermined position of the detection wall.

According to a fifth aspect of the present invention, there is provided a defective yarn removing device for a fluid jet loom, wherein the detecting yarn positioning member is provided on the defective yarn inlet side of the detector.

[0012]

1 to 5 show a state in which a defective yarn removing device 2 is incorporated into an air jet loom as a fluid jet loom 1. In the fluid jet loom 1, the weft yarn 3 is weft-inserted into the opening 7 of the warp yarn 6 by the air jetted from the weft-inserting main nozzle 5 fixed onto the sley 4. The warp yarn 6 forms the opening 7 by the vertical movement of the heald 30. Weft inserted 3
Is beaten by the reed 8 on the cloth fell 10 of the woven cloth 9, and is eventually cut by the yarn supplying cutter 11 on the weft end side on the weft insertion side and separated from the weft 3 inside the main nozzle 5.
The yarn supplying cutter 11 is attached to a fixed position such as a frame of the fluid jet loom 1.

Next, the defective yarn removing device 2 takes up the presence or absence of the defective yarn 3a in the winding device 12 for winding the weft yarn 3 when the weft insertion defect occurs, that is, the defective yarn 3a from the cloth fell 10. It is composed of a detector 13 for detecting, a blowing nozzle 14 for avoiding the weft 3 from the cutting area of the yarn feeding cutter 11 when a weft insertion failure occurs.

The take-up device 12 includes a take-up motor 16 attached to a moving bracket 15, a take-up drum 18 attached to a rotation shaft 17 of the take-up motor 16, and an outer circumference of the take-up drum 18. The pin 19 is provided in the direction.

The moving bracket 15 is rotatably attached at a position above the warp 6 with respect to a rotating shaft 21 of a rotating motor 20 attached to a frame of the fluid jet loom 1, or the like. It is rotatably mounted between a standby position above the cloth fell 10 and a catching position near the cloth fell 10. The standby position of the winding device 12 is also the winding position, which will be described later.

The detector 13 has a moving bracket 15
Is attached to the arm 22 of the. Detector 13
As shown in FIG. 6 in addition to FIGS. 1 to 5, the casing 23 of FIG.
The detection wall 25 is located in the direction of convergence of the pair of guide walls 24, and the vicinity of the detection wall 25 is a detection region 26. The pair of guide walls 24 are provided so that the moving direction side is opened when the winder 12 is moved to the winding position.

In FIG. 6, the pair of guide walls 24 need only be widened on the side that receives the defective yarn 3a.
Alternatively, it may be formed by both guide walls 24 as in B, C, and D. The detection wall 25 includes a wall portion located on the innermost side in the convergence direction of the pair of guide walls 24, and C
Is formed at the intersection of both guide walls 24, and at the center of the U-shaped arc surface at D. In addition, like B, the defective yarn 3
When the inlet of a is formed to be narrower than the detection wall 25, the defective yarn 3a that has entered the detection region 26 is less likely to come off from that position, and thus it is possible to prevent the defective yarn 3a from coming off that position.

If necessary, a guide plate 27 for avoiding the defective yarn 3a is obliquely attached to the detector 13 so as to deflect the jet air flow from the blow-up nozzle 14 to the side.

As shown in FIG. 3, with the winder 12 in the catching position, the detection wall 25 is opposite to the space defined by the plane containing the rotating shaft 21 and the rotating shaft 17 of the winding drum 18. In the space on the winding position (held 30) side,
It is located lower than the rotary shaft 21 and higher than the rotary shaft 17.
Moreover, when the winding device 12 is in the winding position, the detection wall 25 is in a position where it can contact the defective yarn 3a.

During weaving of the fluid jet loom 1, the winding drum 18 of the defective yarn removing device 2 is set to the standby position as shown in FIGS. When the occurrence of weft insertion failure is detected during weaving, air is jetted from the blow-up nozzle 14 and the air flow is jetted to the defective yarn 3a between the main nozzle 5 and the reed 8 for feeding after the beating. Thread cutter 11
The cutting of the defective yarn 3a due to is avoided. The air flow from the blow-up nozzle 14 rises while bending toward the anti-weft insertion side due to the weak air flow constantly ejected from the main nozzle 5, and along the guide plate 27, the winding drum 18
It is oriented so that it does not interfere with.

In this way, the weft yarn 3 and the defective yarn 3a connected to the weft yarn 3 form a loop, and reach the position apart from the detector 13 at the tip of the loop. The fluid jet loom 1 is stopped in the next cycle after a weft insertion failure occurs, and after the stop, the weft insertion failure is automatically reversed to the weft insertion failure occurrence cycle, so that the defective yarn 3a is put out and weaved. It is set so that it can be extracted from the front 10.

In this state, as shown in FIG. 3, the winding motor 12 is rotated to move the winder 12 to the catching position of the defective yarn 3a. At the catching position, the winding motor 16 is activated, and when the winding drum 18 rotates clockwise in FIG. 3, the pin 19 pulls the defective yarn 3a connected from the main nozzle 5 to the cloth fell 10 of the woven fabric 9. Hang and capture.

After the capturing, as shown in FIG.
0 rotates in the opposite direction, so that the winder 12
Is moved to the standby position which is also the winding position. The rotation shaft 17 of the winder 12 is moved by the movement accompanying this rotation.
Moves to a position higher than the detection wall 25 of the detector 13, and the detector 13 moves toward the defective yarn 3a connected to the weave end of the woven cloth 9 and the winder 12 with the pair of guide walls 24. Of the defective yarn 3a
Approach.

For this reason, the defective yarn 3a is generated as shown in FIGS.
As shown in FIG. 3, the sheet is guided by a pair of guide walls 24, passes between them, contacts the detection wall 25, is guided to the detection region 26, and is detected by a sensor (not shown). In addition,
The weft yarn 3 connected between the main nozzle 5 and the winder 12 may not be guided to the detection area 26. Figure 5
As shown in FIG. 4, when the winder 12 is completely moved to the winding position, the defective yarn 3a connected between the winder 12 and the woven end of the woven fabric 9 is detected by the detection wall 25 of the detector 13.
And comes into a bent state.

Before the winding of the defective yarn 3a is started,
The beating is performed once, and the weft yarn 3 is cut by the yarn feeding cutter 11 on the side of the main nozzle 5. Then, the winding motor 16 rotates the winding drum 18 to wind the defective yarn 3a around the winding drum 18 and remove the defective yarn 3a from the cloth fell 10. As the winding progresses, the defective yarn 3a comes out of the weft inserting side weave edge and does not contact the detection wall 25, so that the detector 13 cannot detect the defective yarn 3a or becomes unstable.

Is it impossible to detect from the start of winding,
Alternatively, the number of rotations of the winding drum 18 until it becomes unstable is measured. If it does not reach the value obtained in advance, it is determined that the defective yarn 3a is cut off midway and remains on the cloth fell 10 of the woven fabric 9, and the automatic operation is not performed after the winding is completed.
On the other hand, when the value obtained in advance is reached, the defective yarn 3a
Is determined to be complete, and after the completion of winding, the automatic operation of the fluid jet loom 1 is started.

The winder 12 and the detector 13 are integrally fixed, and the positional relationship can be reversed by the rotation of the rotary motor 20 as a common drive source. The nozzle 5 can be approached, and at the winding position, the detection wall 25 can approach the defective yarn 3a. Also,
The defective yarn 3a blown up by the guide plate 27
Since it falls from a position away from the detector 13, it does not fall on the detector 13 and get caught there, so that it cannot be removed.

Since the defective yarn 3a is brought into contact with the detection wall 25 of the detector 13 and passes through the detection area 26 of the detector 13 in a stable state, the detection of the defective yarn 3a by the detector 13 is stabilized. The pair of guide walls 24 widens the area where the defective yarn 3a can be captured, and even if the position of the defective yarn 3a from the weft insertion side weave is slightly different, the detection wall 25 can be contacted.

The specific example of FIG. 7 is an example in which the mounting position of the detector 13 with respect to the moving bracket 15 is different from the above example, and the rotating direction of the moving bracket 15 is opposite. The movement of the winding device 12 and the detector 13 from the capturing position to the winding position is performed by rotating in the clockwise direction, that is, the direction in which the warp yarns 6 are delivered.

Next, in the concrete example of FIG. 8, the detector 13 is not attached to the moving bracket 15, but is moved horizontally by a dedicated moving means 31 such as a cylinder. At the time of winding the defective yarn 3a, the detection wall 25 of the detector 13 is at the detection position where it abuts the defective yarn 3a. While the winder 12 moves between the standby position and the capture position, the detector 13 moves to the standby position that does not hinder the movement. According to this configuration, by setting the standby position of the detector 13 at a position where the defective yarn 3a blown up for avoiding the cutting does not interfere, the defective yarn 3a can be prevented from being caught without providing the guide plate 27.

Further, the specific example of FIG. 9 is an example in which a suction nozzle 28 is provided as a detection yarn positioning member 29 on the inlet side of the defective yarn of the detector 13. At the time of winding the defective yarn 3a, the suction nozzle 28 starts the suction operation, sucks the defective yarn 3a to bring it into a pulled state, eliminates shake, and abuts the defective yarn 3a on the detection wall 25. Then, the detection region 26 is surely passed. Since the suction nozzle 28 as the detection yarn positioning member 29 is provided below the detector 13, the defective yarn 3a comes out from the weft inserting side woven edge of the woven fabric 9 near the end of winding the defective yarn 3a. Thus, the defective yarn 3a can be detected over the period until it passes the detector 13. Further, the cotton dust attached to the detection surface of the detector 13 can be removed by the suction of the suction nozzle 28.

The detection yarn positioning member 29 may be provided above the detector 13. Further, the detection yarn positioning member 29 may be a blowing nozzle, air may be blown toward the detection region 26, and the defective yarn 3a may be pressed against the detection region 26. By using the blowing nozzle, it is also possible to blow off and remove the cotton wool attached to the detection surface of the detector 13.

Further, the detection yarn positioning member 29 is formed of a pair of leaf springs which are in contact with each other by urging force on the opposite faces, and the defective yarn 3a is passed between the opposing faces to apply tension and to shake the defective yarn 3a. It is also possible to eliminate it and bring it into contact with a predetermined position of the detection wall 25.

[0034]

According to the first aspect of the present invention, the defective yarn detector advances toward the defective yarn connected between the defective yarn winder and the weft inserting side cloth edge of the woven fabric, and the defective yarn is detected. The defective yarn is guided by the guide wall, comes into contact with the detection wall, is positioned in the detection region, and detection is started. In this state, the detector can approach the defective yarn, so that the defective yarn can be reliably detected. In addition, the detection wall functions as a member that regulates the passing position of the defective yarn, and the defective yarn passes through the detection area with little shaking and does not deviate from the detection area. Therefore, the detection of the defective yarn is stable over time. Turn into.

According to the second aspect, the defective yarn detector rotates together with the winding device, and the detector moves toward the defective yarn along with the movement from the catching position to the winding position. Advance. The detector is higher than the winder in the catching position, does not interfere with the operation of the winder for defective yarn, rotates in the reverse direction, and becomes lower in the windup position. It can abut bad yarn that is connected. The detector and the drive device of the winder can be the same, and the simultaneous movement of them can shorten the movement time.

Further, according to claim 3, the defective yarn blown up is guided obliquely upward along the guide plate for avoiding defective yarn and is guided to a position away from the detector. It is possible to prevent the defective yarn in the form of a loop from being caught by the detector and being unable to be wound when the yarn is lowered.

Further, according to the present invention, since the detection yarn positioning member eliminates the shake when the defective yarn passes through the detection region, the defective yarn can be surely detected, and a detector having a narrow detection region is used. Is possible. The air jet can remove the cotton dust and the like adhering to the sensor.

Further, according to the fifth aspect, even after the end of the defective yarn comes out of the weft insertion side of the woven fabric, the defective yarn contacts the predetermined position of the detection wall. The yarn can be detected.

[Brief description of drawings]

FIG. 1 is a side view of a defective yarn removing device in a fluid jet loom according to the present invention in a standby position.

FIG. 2 is a front view of the defective yarn removing device in the fluid jet loom according to the present invention at a standby position.

FIG. 3 is a side view of the defective yarn removing device in the fluid ejecting loom according to the present invention at a catching position.

FIG. 4 is a side view of the defective yarn removing device in the fluid jet loom according to the present invention in a moving position from the catching position to the winding position.

FIG. 5 is a side view of the defective yarn removing device in the fluid ejection type loom according to the present invention at a winding position.

FIG. 6 is an explanatory diagram of a pair of guide walls and a detection wall of the detector.

FIG. 7 is a side view of the defective yarn removing device in the winding position of the fluid jet loom according to the present invention.

FIG. 8 is a side view of the defective yarn removing device in the winding position of the fluid jet loom according to the present invention.

FIG. 9 is a side view of the defective yarn removing device in the fluid jet loom according to the present invention at the winding position.

[Explanation of symbols]

1 Fluid injection type loom 2 Bad yarn removing device 3 weft 3a defective yarn 4 sleds 5 main nozzles 6 warp 7 openings 8 reed 9 Woven cloth 10 Weave 11 Yarn feeding cutter 12 winder 13 detector 14 Blowing nozzle 15 Moving bracket 16 winding motor 17 rotation axis 18 winding drum 19 pin 20 rotation motor 21 rotation axis 22 arms 23 casing 24 guide wall 25 detection wall 26 Detection area 27 Guide plate 28 Suction nozzle 29 Detecting thread positioning member 30 healds 31 means of transportation

Continuation of the front page (56) Reference JP-A-11-107133 (JP, A) JP-A-6-184879 (JP, A) JP-A-7-279007 (JP, A) Actual Kaihei 3-78083 (JP , U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D03D 51/00 D03D 47/28 D03D 51/34

Claims (5)

(57) [Claims] 1. A take-up device for catching and winding a defective yarn and a detector for the defective yarn, wherein when a weft insertion defect occurs, cutting of the defective yarn by a yarn feeding cutter is avoided, and weft insertion is performed. The weft yarn on the main nozzle side for use with the defective yarn is connected, the winder is moved to the catching position near the main nozzle, the defective yarn is caught, and then the winder is moved to the winding position. In the defective yarn removing device in the fluid injection type loom, in which the defective yarn in the state of being cut from the weft yarn on the main nozzle side is extracted from the woven fabric by the winder, a pair of guides that spread toward the tip of the detector. With a wall
A detection wall located in the direction of convergence of the pair of guide walls is formed, and the vicinity of the detection wall is used as the detection region of the detector, and the detector is the winder and the weft insertion side weave of the woven fabric. A defect in a fluid jet loom characterized by causing the defective yarn to pass through between the pair of guide walls and abut against the detection wall by advancing toward the defective yarn connected to the end. Thread removing device. 2. A defective yarn removing device in a fluid jet loom in which a rotary shaft provided above a main nozzle rotates and moves the winder from a catching position to a winding position. And the detector are integrally provided, and when the winding device is rotated to the winding position, the defective yarn connected between the winding device and the weft inserting side woven end of the woven fabric is removed. The defective yarn removing device in a fluid jet loom according to claim 1, wherein the defective yarn is abutted against the detection wall of the detector so that the defective yarn comes into contact with the detector. 3. A defective yarn removing device in a fluid jet loom for blowing defective yarn upward by a jet air flow to avoid cutting of the defective yarn by a yarn feeding cutter, from at least one side surface of the detector from below. 3. A fluid jet according to claim 1, further comprising: a guide plate for bending the jet air flow upward in an oblique direction to guide the defective yarn blown up in an oblique upward direction along the guide plate. Device for removing defective yarns in a loom. 4. The fluid ejection device according to claim 1, wherein the detector is provided with a detection yarn positioning member, and the defective yarn is brought into contact with a predetermined position of the detection wall. Device for removing defective yarns in a loom. 5. The defective yarn removing device in a fluid jet loom according to claim 4, wherein the detecting yarn positioning member is provided on the inlet side of the defective yarn of the detector.