JP2539102Y2 - Weft repair auxiliary device for fluid injection loom - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a weft repair auxiliary device of a fluid injection type loom, and more specifically, a device between a ground side on a non-supply side and a yarn end treatment yarn. The present invention relates to an improvement in a technique for cutting at least a weft yarn regarded as a defective yarn before starting operation of a defective yarn automatic removal mechanism in a section.

(Prior Art) In a fluid jet loom, the non-feed side end of a weft inserted by a weft is caught by a yarn end treatment warp to form a so-called ear, which is separated from the ground by a saw cutter. Rolled up.

When a weft insertion failure occurs, the loom is reversed by the weft insertion failure signal to open the warp shed that once captured the defective yarn, and the defective yarn removing mechanism of the automatic repairing device operates to wind up and remove the defective yarn. It has become.

By the way, poor weft insertion includes (i) a case in which the inserted weft does not reach the non-feed side and becomes a so-called show topic or ben topic, and (ii) a weft inserted in the yarn end on the non-feed side. In the case of a so-called idle stop in which the feeler determines that there is no weft despite reaching the treated warp, (iii) the weft inserted into the weft has reached the anti-feed side ground but In some cases, the yarn does not reach the end-processed warp and is entangled with the previously inserted weft (remaining yarn) in the area between the base ear and the yarn end-processed warp and is not detected by the feeler.

In the case of (i), there is no particular problem even if the defective yarn removing mechanism operates, but in the cases of (ii) and (iii), if the defective yarn removing mechanism starts operating as it is. There's a problem.

That is, the leading end of the weft regarded as a defective yarn is entangled with the above-mentioned remaining yarn and the yarn end treated warp. When the weft in such a state is forcibly pulled by the defective yarn removing mechanism, it breaks in the warp opening and is not completely removed. Therefore, if the operation of the loom is resumed in this state, the broken weft is woven, resulting in a weaving defect.

Therefore, in order to avoid such troubles, at least prior to the start of the operation of the automatic defective yarn removing mechanism, in order to cut at least the weft yarn regarded as a defective yarn, the area between the ground side on the non-supply side and the yarn end treatment yarn is cut. It is conceivable that a cutter is provided in the device.

However, since a cutter for cutting ears is generally already provided in the area, it is not only structurally complicated to add another cutter for cutting such a weft thread regarded as a defective thread, The operation timing of both cutters must be adjusted, and operation control is inevitably complicated.

(Summary of the Invention) In view of the current state of the art, an object of the present invention is to provide an area between the ground side on the non-supply side and the yarn end treatment yarn without complicating the structure and operation control. In this case, it is possible to cut at least the weft yarn regarded as a defective yarn prior to the start of the operation of the defective yarn automatic removal mechanism.

For this reason, in this invention, in the area between the yarn end treatment yarn of the ground side on the opposite side of the yarn supply side, the lug is cut off, and at least prior to the start of the operation of the defective yarn automatic removal mechanism, it is regarded as a defective yarn. The gist of the present invention is to provide a cutter for cutting a weft, which is configured to cut the weft regarded as a defective yarn by setting the momentum of the movable blade to be larger than that at the time of the ear-cutting.

(Embodiment) FIG. 1 shows a first embodiment of the present invention, in which the momentum of the movable blade 1a can be temporarily increased by directly using the ordinary cutter 1 for cutting off ears. It is like that.

That is, the cutter is swingably supported by a pin 9 which is horizontally mounted rotatably on a loom frame (not shown). A V-shaped cam ball lever 2 is pivotally supported at the apex of the horizontal pin 11 similarly fixed to the frame. An upper end of the cam ball lever 2 is connected to the cutter 1 via a cutter rod 4, and a cam ball 8 is rotatably supported at a lower end thereof.

The cam ball 8 is in contact with the cutter cam 3 which rotates in synchronization with the operation of the loom. Although not shown in the figure, the cam 3 has a projection at a predetermined portion on the circumference thereof, and the cutter 1 is driven by this projection to perform normal cutting.

A solenoid 5 is supported at one end of a bracket 12 fixed to the frame of the loom, and its output shaft is connected to a vertex of the cam ball lever 2. An end of an arm 13 extending from the axis of the cam 3 faces the proximity switch 6 provided at the other end of the bracket 12.

The cutter 1 is under the control of the cam 3 during normal cutting. That is, as shown in FIG. 2, the cam ball 8 engages with the protrusion of the cam 3 (the cam 3 is shown by a perfect circle in the drawing for simplicity), and the cutter 1 is moved to the position shown in FIG. Cuts the weft.

At the time of cutting the weft yarn which is regarded as a defective yarn targeted by the present invention, the cutter 1 comes out of the control of the cam 3.
That is, the solenoid 5 is excited by the signal of the proximity switch 6 in FIG. 1 and the weft insertion error signal of the arrival side feeler, and its output shaft acts on one end of the cam ball lever 2,
In order to swing the cam ball 2 around the horizontal pin 11, the cam ball 8 is separated from the cam 3 as shown in FIG. The momentum of the cam ball 8 at this time is larger than that at the time of the projection of the cam 3. Therefore, as shown in FIG. 5, the movable blade 1a of the cutter 1 has a large momentum, and cuts all of the remaining yarn entangled with the yarn end treated warp and the weft yarn regarded as a defective yarn.

FIGS. 6 to 8 show a second embodiment of the present invention, in which the momentum of the movable blade 1a can be temporarily increased by using the ordinary cutter 1 for cutting off the ear as it is. It was made. However, in this example, instead of swinging the output shaft of the solenoid 5 by contacting the cam ball lever 2 with the cam shaft, as shown in FIG. Pin 7
Is rotated.

At the time of normal cutting, the cam ball 8 is under the control of the cam 3 as shown in FIG. 6, and the cutting of the remaining yarn in the normal state is performed in the same manner as in FIG. When a feeler signal is generated due to a poor weft insertion and the momentum of the movable blade is increased, the cam ball 8 is driven under the control of the cam 3 as shown in FIG. Since it is driven by the rotated eccentric pin 7, the momentum of the movable blade of the cutter 1 is the momentum of the cam ball 8 plus the displacement of the cam ball lever 2. At this time, the cutting is performed in the same manner as in the case of FIG.

When cutting a weft yarn regarded as a defective yarn using the cutter of the embodiment described above, the cutting timing of the cutter is close to the time of completion of beating before opening the warp opening by reversing the loom, that is, the defective timing. It is preferable to set the timing before the weft regarded as the yarn moves from the weaving opening. In addition, when the weaving machine is reversed before opening the warp opening and the warp shed is opened before starting the operation of the defective yarn automatic removing mechanism, the weft considered as a defective yarn is cut out by a weaving shed. Since it slightly moves to the side, it is sufficient to provide a cutter in which a weft regarded as a defective yarn exists in the cutting operation area of the cutter.

(Effects of the invention) As described above, according to the invention, the weft yarn which is regarded as a defective yarn is cut using the cutter for cutting off the ears, so that the structure and the operation control are very low. It became a simple configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIGS. 2 to 5 are side views showing the operation thereof, FIGS. 6 and 7 are side views showing a second embodiment of the present invention, FIG. 8 is a sectional side view showing the periphery of the eccentric pin in FIG. Y: Thread end treated warp, W: Weft F: Feeler 1: Cutter for cutting ears 3: Cutter cam 5: Solenoid, 7: Eccentric pin

Claims (3)

(57) [Scope of request for utility model registration] 1. A method according to claim 1, further comprising the step of cutting off the ears in an area between the ground side on the side opposite to the yarn supplying side and the yarn end treated yarn and cutting at least the weft yarn regarded as defective prior to the start of operation of the automatic defective yarn removing mechanism. A fluid that is characterized by cutting the weft yarn regarded as a defective yarn by setting the momentum of the movable blade to be greater than that at the time of cutting off the ears. Weft repair auxiliary equipment for injection loom. 2. The cutter is driven by a cam for cutting off the ears, and the amount of the movement is reduced by an actuator that abuts on a lever for driving the cutter and swings the lever beyond the range of movement by the cam. The apparatus according to claim 1, wherein the value is larger than that at the time of cutting. 3. The method according to claim 1, wherein the cutter is driven by a cam for cutting off the ears, and the momentum is made larger than that at the time of cutting off the ears by an actuator for rotating an eccentric pin which supports a lever for driving the cutter. The device according to claim 1, characterized in that: