JPH0345975Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a defective yarn removing device that automatically removes defective yarns when weft insertion is defective in a shuttleless loom equipped with a tuck-in device.

Prior Art During normal operation, the tuck-in device cuts the weft yarn with a cutter and folds it into the next weave. However, if a weft insertion defect such as short pick occurs, at least the weft yarn on the yarn feeding side is cut by the cutter. This results in the fabric being folded into the next weave.

On the other hand, as a technology related to automatic repair, for example, ``Defect yarn removal device for shuttleless looms'' (Jet No. 60-089720)
) has already been proposed. This removing device automatically pulls out the defective yarn from the front of the weave on the yarn feeding side and sets the machine in a state where it can be restarted. As a condition for this defective yarn removing device to operate normally, the defective yarn must be connected to the weft yarn on the yarn feeding side, and must be free on the opposite yarn feeding side.

However, in the case of a shuttleless loom equipped with a tuck-in device, when a defective weft insertion occurs as described above, the defective yarn is cut by the cutter of the tuck-in device, and the end of this defective yarn is woven into the next front. It gets lost. Even in the case of a middle ear tuck-in device, the thread will be tucked in and the defective thread will be divided into several pieces. In such a state, it becomes impossible for the defective yarn removal device to automatically remove the defective yarn from the opening.

Purpose of the invention The purpose of the invention is to disable the tuck-in device in a shuttleless loom equipped with a tuck-in device, prevent defective yarns from being cut, and prevent them from being woven, and then activate the defective yarn removal device to remove the defective yarns. The goal is to automatically perform the following tasks.

Summary of the invention Therefore, the present invention is designed to displace the defective yarn in such a way that when a defective weft insertion occurs and a weft stop signal is issued, the defective yarn is displaced so that it is not cut by the tucker release and is not tucked in. The defective yarn removing device is activated while connected to the yarn feeding side. Therefore, the defective yarn can be automatically removed from the opening without any malfunction.

Configuration of the Embodiment Hereinafter, details of the present invention will be explained using figures and embodiments shown.

1 to 3 show the mechanical construction of the defective yarn removing device 1 and the tuck-in device 44 of a shuttleless loom.

This defective yarn removing device 1 includes a guide nozzle 2, a cutter 3, and a winding device 4 as main parts. The guide nozzle 2 is a horizontal insertion nozzle 5
and the weft side end of the woven fabric 6 on the yarn feeding side, and is oriented in a direction away from the flying path, for example, diagonally upward. Further, the cutter 3 is provided, for example, at the tip of the weft insertion nozzle 5 and near the cylindrical yarn guide 7. Note that these cutters 3 and yarn guides 7 are fixedly attached by suitable supporting means.

The winding device 4 rotatably supports a winding body 9 and a rotating body 10 inside a cylindrical housing 8. The winding body 9 is a rod 17
Then, the stroke bearing 18 inside the housing 8
It is rotatably and slidably supported in the axial direction by a winder, and a Bronold's 12 is integrally formed at the center position of its tip, and a conical winding surface 13 is formed at its outer peripheral portion. ing. The Bronold's 12 reaches a fluid intake connector 16 attached to the housing 8 and the sliding bearing 11 through a communication hole 14 and a communication groove 15 on the outer periphery. Also, this rolled body 9
A rod 17 is integrally formed at the center of the rear end portion. This rod 17 is supported slidably in the axial direction on a stroke bearing 18 in the housing 8, and its tip corresponds to a pressing body 22 fixed to a piston rod 21 of a pressing cylinder 20. . This rod 17 is always biased to the right by a coil spring 24 provided between a sleeve 19 which also serves as a spring receiver and a spring receiver 23 at the tip of the rod 17. The amount of rightward movement of the roll 9 is regulated by the roll 9 and the corresponding cap 25. The amount of leftward movement is determined by the contact between the rotating body 10 and the winding body. The sleeve 19 is rotatably supported by a ball bearing 26 inside a cap 25 attached to the tip of the housing 8.

Further, the rotating body 10 has a conical winding surface 13.
A fitting portion 28 is integrally formed with a conical recess at a corresponding portion thereof, and is rotatably supported by a ball bearing 30 inside the housing 8 by a hollow rotating shaft 29 in an extension thereof. ing. Note that this ball bearing 30 is prevented from coming off by a cover 31 attached to the opening surface of the housing 8. The inside of this rotating shaft 29 is
It serves as a discharge path 32, and its tip faces into the trash box 33. Further, this rotary body 10 is configured to mesh with a gear 35a of a drive motor 35 through a gear 34 attached thereto, receive rotational force from the drive motor 35, and be driven at a predetermined speed.

In this way, the winding body 9 and the rotating body 10 face each other inside the housing 8 while forming an appropriate space. In this space,
The housing 8 is combined with the guide tube 36 in a crossed state. This guide tube 36 is open at the top and bottom, and a guide hole 37 is located almost below the middle part.
This communicates with the space where the winding body 9 and the rotating body 10 face each other. Note that a guard plate 38 is attached to the upper opening surface of the guide tube 36, if necessary.

Further, a tuck-in device 44 is provided on the yarn feeding side and the opposite yarn feeding side of the woven fabric 6. This tuck-in device 44 is a device that weaves the end of the weft thread 45 into the next weave during weaving, and its main parts include a gripper 46 for frictionally holding the end of the weft thread 45 and a hook portion 47a. A tuck-in needle 47 is provided, which hooks the weft yarn 45 between the woven fabric 6 and the gripper 46 with the hook portion 47a and draws it into an opening 49 formed by the warp yarns 48. Further, a tack cutter 50 for cutting the weft thread 45 is provided near the gripper 46, and a tack release 51 is provided near the tack cutter 50. This Tatsuka escape 51
In this embodiment, the motor 51a is capable of forward and reverse rotation within a predetermined rotation angle range;
It consists of a lever 51b attached to the output shaft of the
Using the weft stop signal A for controlling the loom as an input condition, the lever 51b can be rotated as shown by the two-dot chain line in FIG. As a result, the tatuka relief 51 allows the defective yarn 45a to be removed when the weft insertion is defective.
While holding the end of the defective yarn 45a, the end of the defective yarn 45a is moved to the retracted position, that is, it is not cut by the tack cutter 50 or gripped by the gripper 46, and is pulled by the hook 47a of the tack-in needle 47. It is designed to be moved to a position where it cannot be hung. As a result, in the next weaving cycle, the tuck-in needle 47 attempts to pull the defective yarn 45a into the opening 49 with its hook portion 47a, but since the end of the defective yarn 45a is not present at the predetermined position, the tuck-in operation is performed. This means that you will not be able to do this.
Therefore, the defective yarn 45a is not cut by the tacking cutter 50 and is not drawn into the opening 49, so that it can be easily removed. In FIG. 1, a catch cord 52 for gripping the end of the weft yarn 45 is provided on the opposite yarn feeding side, and a feeler 53 for detecting whether the weft yarn 45 has entered the opening 49 normally.
There is. The above-mentioned weft stop signal A is generated by this feeler 53.

Effects of the Embodiment Next, FIG. 5 shows the sequence of a series of operations.

During normal weft insertion, the weft insertion nozzle 5 pulls out the stored weft yarn 45 from a length measurement storage device (not shown) and sequentially inserts it into the opening 49 of the warp yarn 48 at the weft insertion timing.

However, when a weft insertion defect occurs, the loom
After receiving the "H" level horizontal stop signal A, the brake is applied and the machine automatically stops in the next cycle. Such weft insertion defects are detected at the weave end portion on the reaching side of the weft yarn 45 by the aforementioned weft yarn filler 53 or the like.

On the other hand, when the weft length measuring and storage device (not shown) receives the weft stop signal A, it can unwind the weft 45 using a locking pin and supply the weft 45 of an appropriate length to the weft insertion nozzle 5. shall be. The length of this weft thread 45 is at least the length necessary to bring it from the weft insertion nozzle 5 to the guide hole 37 of the winding device 4. This can be obtained, for example, by unwinding one turn of the weft yarn 45 on a drum, and if the length measuring roller/air storage type weft yarn length storage device is used, the weft yarn length can be obtained by unwinding only one turn of the weft yarn 45 on a drum. This can be controlled by operating the clamper in the opening direction for a predetermined period of time to temporarily release the holding of the weft thread 45.

Now, when the loom is given the stop signal A, the defective yarn removing device 1 starts a series of removing operations. First, the guide knoll 2 injects air from its tip to blow the weft yarn 45 between the weft insertion knoll 5 and the woven fabric 6, and the weft yarn 45 is inside the cylindrical yarn guide 7 of the winding device 4. At the same time, the tacking cutter 50 and the gripper 46 are released by pressing the defective yarn 45a with the tacking release 51 as shown by the two-dot chain line in FIG. Note that if the tack relief 51 is set in a direction to move the defective yarn 45a from the woven front 6a toward the center of the opening 49, the defective yarn 45a will be pulled away from the woven front 6a, so that the subsequent pulling operation will be small. This is advantageous because it can be done using tension. Further, the weft yarn 45 passing through the yarn guide 7 is guided to the winding device 4. The winding body 9 of this winding device 4 takes in compressed air from the outside, and from the blow nozzle 12 blows it into the rotating body 1.
Air is injected toward the discharge path 32 of 0, and negative pressure air is generated near it. As a result, the weft thread 45
enters the inside of the guide tube 36, and then enters the guide hole 37.
It enters the inside of the discharge passage 32 from there. During this time, the tacker cutter 50 is performing a cutting operation, but the weft 45 is not cut because the weft 45 is deviated from the operating position of the tacker cutter 50. As a result, the weft yarn 45 is transferred to the weft insertion nozzle 5
and the woven fabric 6 are still connected to each other.

During this time, the loom comes to a complete stop in the next cycle and then automatically reverses to open the front 6a of the defective yarn 45a. Since the tuck-in device also performs a reverse operation at this time, the tack release 51 holds the end of the defective yarn 45a in the retracted position at least during this time. Further, although the guide nozzle 2 stops jetting air, the winding body 9 continues jetting compressed air from its blow nozzle 12 for a while.

While air is being injected from the blow nozzle 12, the press cylinder 20 is operated to move the piston rod 21 forward, causing the rod 17 to be moved by the press body 22 as shown in FIGS. 1 and 2. Move it to the left against the coil spring 24. Therefore, the conical winding surface 13 of the winding body 9 comes into pressure contact with the conical fitting portion 28 of the rotating body 10, and holds the defective yarn 45a sandwiched therebetween. At the same time, the cutter 3 operates to cut the defective yarn 45a near the weft insertion nozzle 5 between the weft insertion nozzle 5 and the yarn guide 7.

Thereafter, the drive motor 35 automatically starts in response to a starting command from the loom control device and gives rotational motion to the rotating body 10. At this time, the winding body 9
is the tip of the winding surface 13 and the fitting part 28
Due to the fit between
are sequentially wound around the outer circumference. By this winding, the defective yarn 45a is pulled out from the front 6a of the woven fabric 6. During this pulling process, 45 defective threads
If the pulling direction of a is set by the tatuka relief 51 to be closer to the opening 49 of the warp 48 than the extension line of the front 6a, and in a direction that does not rub against the warp 48, the defective yarn 45a will be removed. ,
It is pulled out with small resistance while being pulled away from the front 6a towards the opening side.

In this way, the winding body 9 and the rotating body 10
The defective yarn 45a is wound into a coil around the outer periphery of the winding surface 13. After a certain period of time has elapsed during this winding operation, the drive motor 35 automatically stops. Also, prior to that, the press cylinder 20
In order to retract its piston rod 21, the winding body 9 is moved in the backward direction by the coil spring 24, causing the conical winding surface 13 to move away from the mating part 28. At the same time, the blow nozzle 12 injects air again to blow away the defective yarn 45a wound around the winding surface 13 toward the fitting part 28, and the inside of the hollow rotating shaft 29, that is, the discharge path 32. After that, Trash Box 33
Celebrate your lungs inside. When the work of removing the defective yarn 45a is completed, the loom automatically reverses itself by a necessary angle, and then receives an automatic operation command and starts normal weaving operation.

Other Embodiments The yarn feeding side tuck-in device 44 may or may not be equipped with a weft gripping device such as a catch cord, and the above-mentioned embodiment shows a case in which it is not equipped with a weft gripping device. However, if the weft thread gripping device is available, the weft thread gripping device, e.g.
It is also possible to make the tack-in ineffective by moving the . That is, in FIGS. 6a and 6b, a catch cord guide 59 constituting the catcher relief 51 is arranged above the catch cord 58, and this catch cord guide 59
is rotatably supported on a shaft 60. Also,
This catch cord guide 59 is always prevented from rotating clockwise by a return spring 61, that is, in the state shown in FIG. 6a.
The air cylinder 62 is driven to rotate counterclockwise against the elastic force of the return spring 61. This counterclockwise rotation causes the catch cord 5 to open as shown in FIG. 6b.
8 is moved downward, thereby causing the defective yarn 45a to escape from the grasp of the tuck cutter 63 and the gripper 64, and to a position where it cannot be caught by the tuck-in needle 65. This makes the tact-in ineffective.

In addition, FIG. 7 is a diagram showing an embodiment in which a nozzle 67 is used as the tack release means when the tack-in on the opposite yarn feeding side is made inactive. In addition, in FIG. 1 and FIG. 2, the nozzle 67 is shown by a two-dot chain line. That is, in this embodiment, the defective yarn 45 is removed by blowing air from the nozzle 67.
A is prevented from being gripped by the catch cord 58 and hooked by the tuck-in needle 65. This embodiment is particularly effective when the catch cord 58 does not grip the catch with a slight shot pick.

Moreover, FIGS. 8a and 8b to FIG. 10 show still other embodiments of the present invention. In this embodiment, an actuator 69 including a yarn guide 68, such as a stepping motor, is used as the tack-in-ineffective device, that is, the tack release 51. This yarn guide 68
is the catch cord 58 and the cutter 63 for tatsuka.
During normal weaving, the weaving machine waits at the first position shown by the two-dot chain line in FIGS. 8a and 9a. When a weft insertion failure occurs and the weft stop signal A is output, at the same time, as shown in Fig. 10, a command to disable tuck-in is received.
Actuator 69 operates. This causes the guide nozzle 2 (see FIGS. 1 and 2) to eject, blowing up the next weft thread 45 and preventing weft insertion.
On the other hand, the yarn guide 68 catches the defective yarn 45a at a predetermined position, that is, a position between the warp yarn 48 and the catch cord 58, and guides it to a second position outside the action area of the gripper 64 of the tuck-in device 44 and the tack cutter 63. In addition, since the tack-in grip is performed at a crank angle of around 80°, for example,
The operation of the yarn guide 68 described above has been completed at the latest. Also, at this time, the loom is stopped at around 180°.

After the above operations, the loom is reversed and the defective yarn 45a is picked out. After this feeding, the yarn guide 68 moves to the third position shown in FIGS. 8b and 9b while holding the defective yarn 45a. At the same time, rod 17 (see Figures 1 and 2)
moves forward. At this time, the defective yarn 45a is pulled away from the front 6a.

On the other hand, when the weft winding drive motor 35 is operated, the defective yarn 45a is guided by the yarn guide 68 and is removed while being pulled away from the woven fabric 6a. After this, actuator 69
operates in response to the weft thread separation signal and returns the yarn guide 68 to its original position.

In addition to moving the yarn guide 68 in a circular motion as in the embodiment described above, it may also be pushed in a linear motion.

In addition, tatsu-in failure and defective thread separation,
You may perform this in sequence while checking with a sensor.

In the case of middle ear tuck-in, each ear or weft thread may be moved upward or downward at the same time to release it.

Effects of the Invention As explained above, in a shuttleless loom equipped with a tuck-in device according to the present invention, the weft stop signal is emitted by configuring a shuttleless loom equipped with a tack relief defective yarn removal device that displaces the weft when the weft is defective in weft insertion. Since the defective yarn is not cut or tucked in when received, the defective yarn can be automatically and reliably removed from the opening. In particular, even in the case of a middle ear tuck-in device, defective yarns can be completely removed from the yarn feeding side without being divided into several pieces.

[Brief explanation of drawings]

Fig. 1 is a plan view of a defective yarn removing device and a tuck-in device for a shuttleless loom of the present invention, Fig. 2 is a vertical sectional view of the same device, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 The figure is a side view of the tack relief, FIG. 5 is a time chart during operation, FIGS. 6 a, b, and 7 are perspective views of main parts showing other embodiments of the tack relief, and FIGS. 8 a, 9b is a perspective view showing another embodiment of the tack release, FIG. 9a is a side view of FIG. 8a, FIG. 9b is a side view of FIG. 8b, and FIG. 10 is a side view of FIG. 10 is a time chart during operation of the embodiment shown in FIG. 9. FIG. 1... Defective yarn removing device, 2... Guide nozzle, 3... Cutter, 4... Winding device, 5... Weft insertion nozzle,
6... Woven fabric, 7... Yarn guide, 8... Housing,
9... Winding body, 10... Rotating body, 28... Fitting part, 44... Tuck-in device, 45... Weft, 45
a...Defective yarn, 46,64...Gripper, 47,6
5... Tatsuin needle, 48... Warp thread, 49...
Opening, 50, 63... cutter for tack, 51... tack release, 68... yaw guide, 69... actuator.

Claims (1)

[Scope of utility model registration request] In a shuttleless loom equipped with a tuck-in device that cuts the weft yarn at least on the weft input side during weaving and then weaves the end into the next weaving front, we remove the defective yarn connected to the yarn feed side at the weft stop. A defective yarn removal device for a shuttleless loom, comprising: a defective yarn removing device that operates, and a tack relief device which inputs a weft stop signal when weft insertion is defective and displaces the defective yarn from the operating position of the tuck-in device. Device.