JP2606232Y2 - Weft end holding device for 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 weft end holding device for a fluid jet loom.

[0002]

2. Description of the Related Art In a fluid jet loom, particularly when a strong twist yarn is used as a weft, an end portion of the weft inserted into the weft to prevent the tension of the weft from being lost between the insertion and the beating. Need to be kept in tension. For this reason, as shown in Japanese Utility Model Laid-Open No. 4-78287, a weft-inserted weft is provided as a weft-end holding device by providing a pair of openable and closable retainers at a reaching end of the weft end on the side opposite to the weft insertion side. Is held in a tensioned state by sandwiching the end portion between the pair of holding members.

[0003]

However, in such a conventional weft end holding device, since the weft is held by mutual contact between the pair of holding members, the weft can be reliably held. There has been a problem that the tension is maintained as it is until the fabric is formed, which may lead to fabric defects such as horizontal stripes and uneven spots.

[0004] That is, the weft is held in a state where it is completely stretched by weft insertion, and if it is beaten in this state, the yarn breaks due to excessive tension. Further, even if the pair of holding members are opened immediately before the beating, there is also a problem that the timing is difficult to set because the tension is suddenly lost at the same time as the opening and the twist is returned.

The present invention has been made in view of the above-mentioned conventional problems, and when the end of the weft is held, when the tension of the weft is high, the weft can be pulled out to prevent the above-mentioned drawbacks of the fabric. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION For this reason, the present invention provides a weft end holding device for a fluid jet loom which holds an end of a weft inserted weft between a pair of holding members movable on a counter weft insertion side. In the pair of holding bodies , a convex portion for holding a weft is provided.
Each is installed to extend in the direction intersecting the flight direction of the weft.
The convex portions come into contact with each other when holding the weft
The convex portions are weft-wound so that the weft is bent and held without
Are displaced with respect to the flight direction .

[0007]

In the above construction, the protrusion holding the weft is formed by
Each is installed to extend in the direction intersecting the flight direction of the weft.
The convex portions come into contact with each other when holding the weft
The convex portions are weft-wound so that the weft is bent and held without
When the weft tension is high, slippage occurs to some extent, and the weft is pulled out, which makes it possible to set the proper tension. The occurrence of a fabric defect can be prevented. In addition, the release of the pair of holding members may be performed at an appropriate time after the beating, and the adjustment of the opening timing may be rough.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a fluid jet loom. The weft 1 is inserted into the opening of the warp 3 by a weft insertion nozzle (for example, a water jet nozzle) 2, beaten by a reed 4 to a weave 5, and woven as a woven fabric 6.

A plurality of yarn end treatment yarns 7 which are opened and closed similarly to the warp 3 are provided on the side opposite to the weft insertion side of the three warp yarns.
8 is a guide plate, 9 is a false twist spindle, and 10 is a belt drive mechanism. Further, a cutter 11 is provided between the woven fabric 6 and the yarn end treatment yarn 7 for cutting the weft 1 after several picks from the weft insertion.

Here, the reed holding body 12 is located at the end of the weft yarn 1 which has been inserted (at a position opposite to the weft insertion yarn 7 than the yarn end processing yarn 7).
, A weft end holding device 13 is provided. The weft end holding device 13 will be described with reference to FIGS. 2 is a side view of the open state of the weft end holding device 13, FIG. 3 is a side view of the closed state of the weft end holding device 13, and FIG. 4 is a sectional view taken along line AA of FIG.

A pair of upper and lower flat plate-like holding members 15 and 16 are provided so as to project forward (toward the cloth fell 5 side) from the support member 14 mounted on the reed holding member 12 and sandwich the flight path of the weft 1. I have. Here, on the upper surface of the lower holding body 15, a plurality of ridges 15a are formed in parallel as convex portions extending in a direction perpendicular to the flight direction of the weft 1, and also on the lower surface of the upper holding body 16, Weft 1
Ridge 16 as a ridge extending in the direction perpendicular to the flight direction of
a are formed in parallel. However, the ridges 15a on the lower holder 15 and the ridges 16a on the upper holder 16 are staggered in the flight direction of the weft 1 so that they do not overlap.

The ridges 15a and 16a are formed by welding a flat plate on the plate surfaces of the holders 15 and 16 as shown in FIG. 4 and by holding the holders 15 and 16a as shown in FIG. , 16 may be formed by welding a round bar shape to the plate surface.
As shown in (1), the holders 15 and 16 may be integrally formed by drawing or the like. The number of the ridges 15a and 16a should be at least one, one on one side and two on the other side, a total of three.

The tip of the lower holder 15 is bent obliquely downward, and the tip of the upper holder 16 is bent obliquely upward.
The base end of the lower holder 15 is fixed to the support member 14. On the other hand, the upper holding body 16 is rotatably attached to the shaft 17 provided above the lower holding body 15, and the base end side thereof is provided on the support member 14 in parallel with the flight direction of the weft 1. The opening and closing operation with respect to the lower holding body 15 is performed by the rotation about the shaft 17.

A stopper 18 is fixed to the upper surface of the lower holder 15 on the base end side, and when the upper holder 16 is closed by rotating around the shaft 17 counterclockwise, the rotation is stopped by the stopper 18. , So that the holders 15 and 16 do not contact each other. That is, the ridges 15a of the lower holding body 15 do not contact the plate surface of the upper holding body 16, and the ridges 16a of the upper holding body 16
It does not come in contact with the 15 plate surfaces.

A permanent magnet 19 is attached to a portion of the upper holder 16 behind the shaft 17, and the permanent magnet 18 is located in a U-shaped electromagnet 20 attached to the support member 14. The polarity of the electromagnet 20 changes according to the energizing direction (+-) controlled by a control circuit 22 to which a signal from an angle sensor 21 for detecting the rotation angle of the loom main shaft is input. When the electromagnet 20 is N
The pole and the upper side become the S pole, and the permanent magnet 19 is moved downward. In the minus direction, the lower side of the electromagnet 20 becomes the S pole and the upper side becomes the N pole, and the permanent magnet 19 is moved upward. ing.

By the downward movement of the permanent magnet 19, the upper holder 16 is rotated clockwise as shown in FIG. 2 to form an opening between the upper holder 16 and the lower holder 15, and the weft is inserted here. The end of the weft yarn 1 can be received. Also permanent magnet
The upward movement of 19 causes the upper holder 16 to move as shown in FIG.
Is rotated counterclockwise, and the weft 1 is
Can be held.

Next, the operation will be described. Before weft insertion, the direction of power supply to the electromagnet 20 by the control circuit 22 is the + direction. Therefore, the permanent magnet 19 is moved downward by the electromagnet 20, and the upper holder 16 is rotated clockwise to form an opening between the upper holder 16 and the lower holder 15 (see FIG. 2). Therefore, when the weft 1 is inserted into the opening of the warp 3 by the water injection of the weft insertion nozzle 2, the end of the weft 1 passes through the opening of the yarn end processing yarn 7, and is then held by the weft end holding device 13. Body 15 and upper holder
Enter the opening between 16.

Immediately after this (for example, when the rotation angle of the loom
At 90 °), the direction of energization of the electromagnet 20 by the control circuit 22 based on the signal from the angle sensor 21 becomes negative. Therefore, the permanent magnet 19 is moved upward by the electromagnet 20, the upper holder 16 is rotated counterclockwise, and the end of the weft 1 is held between the upper holder 16 and the lower holder 15 (see FIG. 3). At this time, the rotation of the upper holder 16 is restricted by the stopper 18 and the lower holder
15 and the upper holder 16 do not contact each other, but these holders 15,
Since the protruding strips 15a and 16a extending in the direction orthogonal to the flight direction of the weft 1 are formed alternately on the plate surface of the 16 respectively, the weft 1 is bent in a wavy manner by these protruding strips 15a and 16a. Thus, it is held only by the frictional force with the ridges 15a and 16a.

Therefore, although the end of the weft thread 1 inserted is held by the pair of upper and lower holders 15 and 16, it is not held by the mutual contact of the upper and lower holders 15 and 16 but is convex. Since it is held only by the frictional force with the ridges 15a and 16a, when the tension of the weft 1 is high, slippage occurs to some extent, and the weft 1 is pulled out. Accordingly, since the beating is performed with the tension of the weft 1 being proper, it is possible to prevent the occurrence of a fabric defect such as a horizontal shrinkage or uneven unevenness.

Then, at an appropriate time after the beating (for example, at a rotation angle of the loom main shaft of 30 °), the direction of energization of the electromagnet 20 by the control circuit 22 based on the signal from the angle sensor 21 becomes positive. Accordingly, the permanent magnet 19 is moved upward by the electromagnet 20, and the upper holder 16 is rotated clockwise to be separated from the lower holder 15, thereby completely releasing the weft 1 and the next weft insertion. Prepare for.

FIGS. 7 and 8 show another embodiment.
Note that the same reference numerals are given to the same elements as those in the above-described embodiment. In this embodiment, the weft end holding device 30 protrudes from the support member 31 attached to the front side of the reed 4 on the reed holding body 12 to the side of the weft insertion side (the weft insertion nozzle side) to form a weft flight path. A pair of upper and lower plate-like holding members 32 and 33 are provided so as to sandwich the holding members.

Here, on the plate surface of the lower holding body 32, a ridge 32a as a ridge extending in a direction perpendicular to the flight direction of the weft 1 is provided.
Are formed in parallel with each other, and also on the plate surface of the upper holding body 33, a convex portion extending in a direction orthogonal to the flight direction of the weft 1 is formed.
A plurality of ridges 33a are formed in parallel. However, the ridges 32a on the lower holding body 32 side and the ridges 33a on the upper holding body 33 side are staggered in the flight direction of the weft 1 so that they do not overlap.

The lower holder 32 is fixed, and the upper holder 33 is fixed.
Is configured to open and close with respect to the lower holding body 32 by rotating about the axis 34. Then, a stopper 35 is fixed to the upper surface on the base end side of the lower holder 32, and when the upper holder 33 closes by rotating around the shaft 34 in a counterclockwise direction, the rotation is stopped by the stopper.
Restricted by 35, the holders 32, 33 do not come into contact with each other.

The point that the upper holder 33 is driven by the electromagnet 37 provided for the permanent magnet 36 on the upper holder 33 side is the same as in the above-described embodiment. Therefore, the inserted weft 1
After the end of the lower holder 32 is turned into the opening between the pair of upper and lower holders 32 and 33, the upper holder 33 is rotated in the counterclockwise direction.
The rotation of the upper holding body 33 is regulated by the stopper 35, and the lower holding body 32 and the upper holding body 33 do not come into contact with each other. Since the ridges 32a and 33a extending in the direction orthogonal to the flight direction of the weft 1 are formed alternately on the plate surfaces of the 32 and 33, respectively.
The weft 1 is held only by the frictional force with the ridges 32a, 33a in a state where the woof 1 is bent in a wave shape by the ridges 32a, 33a.

Therefore, although the ends of the weft yarn 1 inserted are held by the pair of upper and lower holders 32 and 33, the ends are not held by mutual contact between the upper and lower pair of holders 32 and 33, but are convex. Since the weft 1 is held only by the frictional force with the ridges 32a and 33a, when the tension of the weft 1 is high, slippage occurs to some extent, and the weft 1 is pulled out. Therefore, since the beating is performed with the tension of the weft 1 being appropriate, it is possible to prevent the occurrence of a fabric defect.

FIGS. 9 and 10 show still another embodiment. In this embodiment, the lower holder 41 as a convex portion
Is constituted by arranging three round bars extending in the direction perpendicular to the flight direction of the weft in parallel, and the upper holding body 42 as a convex portion has a round bar extending in the direction perpendicular to the flight direction of the weft. Are arranged side by side in parallel, and each is integrated by a support portion (not shown). Of course, the round bar of the upper holding member 41 side rod and the lower holding member 42 side are offset alternately of the running direction of the weft. Note that a plate having a rectangular cross section can be used instead of the round bar.

Even with the holding bodies 41 and 42 having such a shape, the ends of the inserted weft can be bent and held only by the frictional force. When the tension of the weft is high, it is appropriate. Then, the weft is pulled out, and the weft is beaten in an appropriate tension state, so that the occurrence of a fabric defect can be prevented .

In the above-described embodiment, the weft end holding device is mounted on the reed holder and moves integrally with the reed. However, the weft end holding device may be fixed to a frame or the like on the side opposite to the weft insertion side of the loom. Good.

[0029]

According to the present invention, as described above, weft yarns
The protrusion that holds the wire extends in the direction that intersects the flight direction of the weft.
So that when the weft is held,
So that the weft is bent and held without the parts touching each other.
The protruding portions are shifted from each other in the flight direction of the weft.
The weft is formed by the projections provided on the pair of holding members.
Can be held by the frictional force by bending the end of the weft, and when the tension of the weft is high when holding the end of the weft , the weft can be pulled out, preventing over tension, preventing the occurrence of fabric defects As a result, the effect that the opening timing can be roughly adjusted can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a side view of the open state of the weft end holding device in the embodiment.

FIG. 3 is a side view showing the closed state of the weft end holding device according to the embodiment;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a front view corresponding to a sectional view taken along line AA of FIG. 3, showing a modified form of the ridge.

FIG. 6 is a front view corresponding to the AA cross-sectional view of FIG. 3 showing a modified form of the ridge.

FIG. 7 is a plan view of a loom showing another embodiment.

FIG. 8 is a front view of another embodiment of the embodiment.

FIG. 9 is a perspective view of a holder showing another embodiment.

10 is a view taken in the direction of arrow B in FIG. 9.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 weft 2 weft insertion nozzle 4 reed 13 weft end holding device 14 support member 15 lower holding body 15a ridge 16 upper holding body 16a ridge 17 shaft 18 stopper 19 permanent magnet 20 electromagnet 21 angle sensor 22 control circuit 30 weft end holding device 31 Support member 32 Lower holder 32a ridge 33 Upper holder 33a ridge 34 Shaft 35 Stopper 36 Permanent magnet 37 Electromagnet 41 Lower holder 42 Upper holder

Claims (1)

(57) [Scope of request for utility model registration] 1. A weft end retaining device of a fluid jet loom to hold between the movable pair of holding members the ends of the weft to weft insertion by the reaction weft insertion side, the a pair of holding bodies, weft The convex part that holds the
Each is provided to extend in a direction intersecting the running direction,
When holding the weft, the convex parts do not come into contact with each other
In order to keep the weft bent,
A weft end holding device for a fluid jet loom, wherein the weft end holding device is arranged so as to be shifted with respect to the direction .