JPS58163758A - Wefting method in fluid jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a weft insertion method in a fluid jet loom.

BACKGROUND TECHNOLOGY In general, in a fluid injection type loom, the weft yarn Y is ejected by a jetting fluid such as air from a main nozzle 2 mounted on the slay 1, as shown in Fig. 1.2.
The weft is inserted into the guide passage formed by the guide portions 3a of the guide pieces 3 arranged in parallel above. Then, the sley 1 is tilted around the locking shaft 4 in the direction of the arrow in FIGS. was whipped by Orimae M. Subsequently, the sley 1 is rotated around the locking shaft 4 in the direction opposite to the arrow direction in the figure, and returns to the weft insertion position again.

This beating operation is repeated to weave the woven fabric W, and the tip of the weft Y passes through the guide path formed by the many guide pieces 3 to reach the end of the selvedge E on the side opposite to the weft insertion side. is an essential requirement for the quality of the woven fabric W. For this reason, a method is also used in which a large amount of fluid is injected from the main nozzle 2 (that is, by increasing the injection pressure) so that the tip of the weft yarn Y reaches the opposite end of the weft insertion shaft of the waste selvedge E, but this method does not There is a risk that the ejected fluid will be wasted, and that the ejected fluid will leak from the guide passage through the escape passage 3b at a higher rate, and the tip of the weft yarn Y will jump out of the guide passage by riding on this leaked ejected fluid. There was also.

Purpose The purpose of the present invention is to bend or otherwise deform the weft yarn tip, which is within a selvage length from the weft tip before weft insertion, to increase the driving force that the weft receives from a jetted fluid such as air. Another object of the present invention is to provide a weft insertion method for a fluid jet loom, which allows normal weft insertion and reduces the amount of jet fluid used.

Embodiment Hereinafter, an embodiment embodying the present invention will be explained based on FIGS. Located at Orimae M
This is a weft cutting device located nearby and is operated in synchronization with the beating operation. A weft deforming device 12 is disposed adjacent to the weft cutting device 11 on the side of the main nozzle 2, and is operated in synchronization with the beating operation like the weft cutting device 11.

The weft deforming device 12, which constitutes the main part of the present invention, will be explained in detail based on FIGS. The cam 14 rotates in the direction of arrow P, and the cam 14 is a 5-shaped interlocking mechanism that is rotatably attached to a fixed shaft 15 in the weft insertion direction on a plane perpendicular to the weft insertion direction, with the same axis 15 as the center. The lever has a rotatable cam roller 14a at the tip of one arm, and a connecting pin 14b at the tip of the other arm. This interlocking lever 14 is connected to a tension spring 16 suspended between a locking protrusion 14c protruding near the cam roller 14a and a side frame (path shown) on the weft insertion side of the loom.
The cam roller 14a is always urged clockwise in FIGS. 3 and 4 about the fixed shaft 15, and the cam roller 14a is always in contact with the upper circumferential surface of the cam 13.

Reference numeral 17 denotes a fixed press-welding piece 19 attached to the side frame on the weft insertion side of the loom in parallel with the frame by bolts 18, and a fixed pressure-welding piece 19 rotatably attached to the press-welding piece 19 about a shaft 21. The connecting pin 14b is loosely fitted into a long hole 20b that is transparently provided at the tip of an arm 20a of the movable pressure contact piece 20. Moreover, the pressure contact parts 19a, 2 of the same pressure contact pieces 19, 20
As shown in FIGS. 5 to 7, 0c is formed in a wave-like shape in the longitudinal section in the weft insertion direction, and in a press-contact state, they are perfectly joined as shown in FIG. 6.

Further, the pressure contact portion 19a of the fixed pressure contact piece 19 is heated to an appropriate temperature by a heating device (not shown).

The weft deforming device 12 having such a configuration has the cam roller 1
When 4a is located on the circumferential surface of the cam 13 at an equal distance 13a from the axis 0, it is a re-pressing part 19a.

20c is the most distant as shown in FIG. , 20c are adjusted so that they are tightly joined as shown in FIG.

In addition, 22 shown in FIG. 2 is a weft cutting device disposed on the side opposite to the weft insertion, and is used to cut and separate the weft for the discarded selvage E (this device 22 does not necessarily operate in synchronization with the beating operation). ).

Next, the operation of the embodiment configured as described above will be explained.

Now, when the weft yarn Y ejected from the main nozzle 2 is inserted into the guide path formed by the guide piece 3, and the sley 1 starts to be tilted in the direction of the arrow shown in FIG. On the circumferential surface of the cam 13 at an equal distance 13a (
As the cam roller 14a, which is in contact with the spring 16, approaches the farthest distance 13b, it is gradually pushed up against the biasing force of the pi 16 so as to be separated from the axis 0. Then, the interlocking lever 14 is rotated about the fixed shaft 15 in the direction of arrow Q1 in the figure, and the movable pressure contact piece 20 is rotated about the shaft 21 by the connecting pin 14b loosely fitted into the long hole 2Ob. It begins to rotate in the direction of arrow R1. When the weft yarn Y escapes from the guide path and is reeded against the cloth fabric M, as shown in FIG. Nosutemi E
The corresponding part will be inserted. When the weft yarn Y is beaten, the cam roller 14a moves as shown in FIG.
The cam 13 comes into contact with the circumferential surface of the farthest distance 13b and is pushed up to the highest position, and the pressing portions 19a and 20c press the weft yarn Y to tightly join it as shown in FIG. At the same time as this joining, the weft yarn Y is cut by a weft yarn cutting device.

Furthermore, when the cam 13 rotates in the direction of arrow P from the state shown in FIG.
4a, the cam roller 14a is gradually moved onto the circumferential surface of the cam 13 at an equal distance 13b by the biasing force of the spring 16, and is pulled down. Then, the interlocking lever 14 moves to the fourth position.
The movable press-contacting piece 2o is rotated in the direction of arrow R2 in the figure, and the press-contact parts 19a and 20c are gradually separated. At the same time, the main nozzle 2 begins to be tilted in the opposite direction to the direction of the arrow in FIG.
The weft is pulled out from between Oc and returns to the weft insertion position shown by the chain line in the same figure, but since the pressure welding part 19a of the fixed pressure welding piece 19 is in an appropriate heated state, the weft yarn injected between the surface pressure contact parts 19a and 20c As shown in Figure @7, Y is deformed and fixed in the wave shape of the pressure contact portions 19a and 20c.

Then, the leading end of the inserted weft yarn Y rides on the fluid jetted from the main nozzle 2 and flies to a position where the deformed part corresponds to the selvedge E.

In this way, the portion of the weft Y corresponding to the discarded edge E is bent and deformed, and the propulsive force received from the jetting fluid jetted from the main nozzle 2 increases. This is also clear from the hydrodynamic fact that the propulsion force that the yarn receives from the jet fluid increases as the surface area of the yarn increases. Therefore, as the propulsion force increases, the flying speed of the weft yarn Y increases, so the weft yarn Y reaches the opposite weft inserting cloth end W1 more reliably than in conventional fluid injection looms, which in turn makes it easier to use the injection fluid. The amount can be reduced.

In addition, since the tip of the weft yarn Y is bent and deformed, it becomes difficult to pass through the slit-shaped escape passage 3b of the guide piece 3, and therefore, the weft yarn Y during weft insertion passes through the escape passage 3b and exits the guide passage. The phenomenon of popping out is prevented.

Furthermore, since the part of the weft Y that undergoes deformation is limited to within the length of the discarded edge E from the tip of the same type Y, the tips of the weft Y become entangled with each other as they are deformed, and the tip ends of the weft yarn Y become entangled within the guide path. There is no fear that it becomes difficult to penetrate into the woven fabric W or that the deformed portion is woven into the woven fabric W.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be embodied as follows, for example.

(1) As shown in Figure 8, weft cutting blade 23°24
Use a pressure welding device 17 having a In this way, the new weft trimmer r#11 can be omitted.

(2) A device for spraying steam onto the tip of the weft Y is disposed near the weft deforming device 12. In this way, weft Y
Deformation fixation is more effectively achieved.

(3) The tip of the weft Y is deformed by a heating device (not shown) attached to the side frame of the loom, located outside the cloth edge W1 on the weft insertion side and near the front M of the fabric. This thermal deformation is particularly effective for synthetic fibers.

As for the heating device, it is effective that the shape of the heater part of the heating device is in partial contact with the weft Y.

(4) Figure 9 (a), (b), (c), (
As shown in d), the tip of the weft Y is deformed into an appropriate shape, and as shown in (e) of the same figure, the tip of the weft Y is untwisted.

Effects As detailed above, the present invention deforms, such as bending, the tip of the weft that is within the length of the selvedge from the tip of the weft before weft insertion, and reduces the propulsive force that the weft receives from a jetted fluid such as air. By increasing the weft insertion, normal weft insertion can be performed.
Furthermore, since it has the effect of reducing the amount of injection fluid used, it is an excellent invention for industrial use as a weft insertion method in fluid injection looms.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the beating operation in a fluid jet loom, Fig. 2 is a plan view of the road body showing an embodiment embodying the present invention, and Figs. 3 and 4 are respective main parts of the present invention. 5 is an enlarged sectional view taken along the line A-A in FIG. 3, and FIG. 6 is an enlarged sectional view taken along the line B-B in FIG. 4.
Fig. 7 is a front view showing the weft tip after deformation, Fig. 8 is a vertical sectional view of the main part showing another example of the present invention, Fig. 9 (a), false),
(c), (d), and (e) are schematic diagrams each showing various deformed shapes of the weft tip. Weft deforming device 12, cam 13, interlocking lever 14, spring 1
6. Pressure welding device 17゜Patent applicant Toyota Industries Corporation representative
Patent attorney Hironobu Onda

Claims (1)

[Scope of Claims] 1. In a loom in which the weft is inserted while being carried by a jet of fluid, the weft tip, which is within the length of the weft from the tip of the weft before weft insertion, is deformed such as by bending, and the weft A weft insertion method for a fluid injection type loom, characterized in that the propulsive force received from the injection fluid is increased. 2. The weft insertion method for a fluid jet loom according to claim 1, wherein the deformation of the weft tip is performed by a weft deformation device located outside the cloth end on the weft insertion side and near the front of the fabric. 8 The weft deforming device consists of a cam that rotates in synchronization with the beating operation, an interlocking lever that is brought into contact with the cam by a spring and swings as the cam rotates, and a linkage lever that swings as the lever swings. 3. The weft insertion method in a fluid jet loom according to claim 2, comprising a pressure welding device comprising a pair of pressure welding pieces each having a pressure welding portion that is joined and separated. 4 Claim 2 in which the weft deforming device is a heating device
Weft insertion method in a fluid jet loom as described in 2.