JPS5929701B2 - Air injection loom weft insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auxiliary nozzle for assisting the action of a main weft insertion nozzle in a weft insertion device of an air injection loom.

As a conventional weft insertion auxiliary nozzle device, there are devices shown in FIGS. 1 to 3.

Fig. 1 shows the present invention as shown in Fig. 4, in which guides are arranged in a row at a predetermined gap in the weft insertion direction, and the weft is carried by the air from the main nozzle into the guide holes of these guides, and the weft is inserted. In this type of air injection loom, a cavity shown by a dotted line is provided inside the guide a as an auxiliary nozzle, and an injection port C communicating with the cavity is provided on the side of the guide a.
Since the guide element a is thin, it is difficult to form the injection port C in the cavity and requires high machining accuracy. It is impossible to change.

In addition, since the injection port C is machined to have a wall thickness of about 1 mm, it has drawbacks such as difficulty in accurately setting the direction of air injection.

In addition, the apparatus shown in FIG. 2 is provided with a concave part f of the lead d, and auxiliary nozzles g directed toward the concave part f are successively arranged at a predetermined gap in the weft insertion direction, and at the tips of these auxiliary nozzles g. This relates to an air-injection type loom that injects air in the direction of the arrow from a provided injection port and enters the weft in cooperation with the air injected from the main nozzle.These auxiliary nozzles Since the shape of the tip is a protrusion parallel to the warp row, it is necessary to change the mounting angle of the auxiliary nozzle g in order to adjust the jetting direction. Changing this mounting angle will change the warp thread displacement of the auxiliary nozzle g. has the disadvantage of reduced functionality.

FIG. 3 again relates to an air-injection type loom using a guide, which was disclosed in Japanese Patent Application Laid-open No. 7576/1983.

In the figure, i is a warp, `` is a reed, k is a reed holder, l is a guide, m is an auxiliary nozzle, and n is its injection port.

In other words, this device has the auxiliary nozzle m and the air guide l separate, but since the air guide l is placed closer to the fabric front than the auxiliary nozzle m, the auxiliary nozzle m enters between the warp threads faster. become.

Therefore, the tip of the auxiliary nozzle m must be used to separate the warp yarns, so the tip of the auxiliary nozzle m must be shaped appropriately.

In other words, since the tip of the auxiliary nozzle m is inserted into the warp row, the width in the weft insertion direction can only be about 3 am at most, so it is difficult to accurately orient the injection port in such a narrow area. be.

In addition, in order to accurately orient the injection port, the drilling surface must be flat, so the shape of the auxiliary nozzle is similar to the auxiliary nozzle shown in Figure 2 described above. The same problem occurs.

Furthermore, even if the auxiliary nozzle m were to be shaped like a pipe, there is a drawback that it is difficult to form the top part so as not to damage the warp threads.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional device, and by separating the warp body and the weft insertion auxiliary nozzle and configuring them as separate bodies, the jetting direction of the auxiliary nozzle can be optimized. Moreover, no matter how you adjust the auxiliary nozzle, there is no risk of damaging the warp threads when the body enters between the warp threads.
Furthermore, it is an object of the present invention to provide a device that does not require a high degree of precision in machining the auxiliary nozzle and is extremely easy to manufacture.

The present invention will be explained in detail below with reference to FIGS. 4 to 14.

Figures 4 to 12 show a type of air injection in which guides are arranged in series at a predetermined interval in the weft insertion direction, and the weft is inserted into the guide holes of these guides by being carried by the airflow ejected from the main nozzle. This relates to type looms.

In the figure, 1 is the warp, S is the opening of the warp 1, 2 is the weft, 3 is the woven fabric, 4 is the woven fabric, 5 is the reed (reed), 5a is the lower frame of the reed 5, 6
7 is a channel-shaped lead holder, 7 is a channel-shaped holder that is fitted into the lead holder 6 together with the lower frame 5a, and 8 is a bolt for tightening and fixing the holder T.

Reference numeral 9 designates a number of jetting fluid guides (air guides) arranged in parallel along the lead holder 6, and is composed of an upright portion 9a and a curved portion 9b branching from the middle thereof.
A substantially circular guide hole 11 is formed by a tongue piece 9c that branches from the inner circumferential surface of the tip end of b and faces the weft exit gap 10, and is communicated with the outside through the gap 10.

This guide 9 is arranged along the weft insertion direction in the holder 7 with a predetermined gap, and the resin 1 filled in the holder 7
2 fixes its base.

In the present invention, the guide element 9 is used as an auxiliary nozzle device.
Separately from this, a body 13 is formed by a warp section having a shape substantially similar to that of the upright portion 9a of the guide 9.

That is, the head of the body 13 is formed into a smooth curved surface 13b from the ridge 13a, and the ridge 13a continues to the lower part on the reed 5 side, and both sides thereof are formed into a smooth curved surface. be.

The end surface 13c opposite to the reed 5 is formed into a flat shape having a width of about 3 mm, and the guide element 9
The inner peripheral surface of the guide hole 11 is slightly recessed toward the reed 5 side when viewed from the weft insertion nozzle side.

Further, an end surface 13d corresponding to the surface 9d facing the tip of the curved portion 9b of the guide 9 is formed so as to overlap the surface 9d facing the guide 9 when viewed from the weft insertion nozzle side.

Further, the auxiliary nozzle 14 is formed into a pipe shape with a closed end, and an injection port 15 is provided on the side surface of the closed end.

As shown in FIG. 8, between the rows of the guides 9, the warp threads are arranged so that the front edge of the body 13 is at a predetermined interval between the rows of the guides 9.
The base 13e is fixed by the resin 12 in the holder 7, and the warp threads pass through the resin 12 and the bottom of the holder 7 on the opposite side of the end surface 13c of the body 13. An auxiliary nozzle insertion hole 16 is provided, and a screw hole 17 with a larger diameter than the hole 16 is formed in the lower part of the hole 16 on the holder T side, and a tapered hole 18 is formed between the screw hole 1T and the hole 16. do.

Further, a hole 19 with a larger diameter than the screw hole 17 is provided at the bottom of the lead holder 6, and the auxiliary nozzle 14 is inserted into these holes 1917, 18, and 16 from below, so that the upper and lower ends of the hollow cylindrical body are tapered. A nozzle holder 20 having a split groove (not shown) in the axial direction is fitted onto the auxiliary nozzle 14, and has an auxiliary nozzle insertion hole 21a in the center, and a tip 21b of the hole 21a has a conical surface. A nut 21 formed in a shaped recess is fitted onto the auxiliary nozzle 14 and screwed into the screw hole 17 to attach the auxiliary nozzle 14 to the reed holder 6 in a fixed and adjustable position.

In the figure, reference numeral 22 denotes a flexible tube connected to an air supply source (not shown), which fits into the lower end of the auxiliary nozzle 14 and is fastened with a band 23.

9 and 10, the auxiliary nozzle 14 is connected to the guide 9.
This is an embodiment in which the warp threads are not allowed to protrude inside the guide holes 11, and in this case, the warp threads retract the end surface 13c of the body 13 toward the reed 5, and move the auxiliary nozzle 14 toward the reed 5 by that much. A semicircular guide groove 24 is provided on the inner peripheral surface of the guide hole 11 of the guide element 9 adjacent to the injection port 15 side of the auxiliary nozzle 14 so as not to interfere with the fluid ejected from the injection port 15 provided in the auxiliary nozzle 14. will be established.

Further, in the embodiment shown in FIGS. 11 and 12, the warp body 13 is formed of metal such as aluminum, a space 25 is provided in the middle part, and the auxiliary nozzle 14 is inserted diagonally through the space 25. is arranged.

Furthermore, FIGS. 13 and 14 show an embodiment in which the present invention is applied to an air injection type loom having a semicircular groove 5b in the center of the front surface of the reed 5 for guiding the injection air.

In this case, the guide 9 is not necessary, so the lead holder 6
As shown in FIG. 14, only the auxiliary nozzle devices according to the present invention are arranged at appropriate intervals.

In other words, 26 is the warp thread body 13 and the auxiliary nozzle 1.
This holder holds the reed holder 4 and is fixed to the front surface of the reed holder 6 with bolts 27.

Further, 28 is an inclined plate for fixing the lower frame 5a of the reed 5 to the reed holder 6, and 29 is this inclined plate 28 and the reed holder 6.
30 is a bolt for fixing the pusher body 29 to the lead holder 6.

In this case, it is preferable that the top of the warp body 13 be located near the extension line of the lower edge of the semicircular groove 5b of the reed 5, as shown by the solid line diagram in FIG.

Further, arrow C in FIG. 14 indicates the direction in which air is injected from the injection port 15 of the auxiliary nozzle 14.

Next, the operation of the apparatus of the present invention constructed as described above will be explained.

During beating of the loom, the reed holder 6 is in the position shown by the chain line in FIG. When the holder 6 moves in the direction of the solid line, the guide element 9 and the body 13 of the thread holder 1 pass through the warp thread 1 and enter the opening S of the warp thread 1, as shown in FIG.

Then, when the guide hole 11 of the guide 9 faces a weft insertion nozzle (not shown), air is jetted from the weft insertion nozzle, and the weft yarn 2 is carried by the jetted airflow. In this case, pressurized air is supplied to the auxiliary nozzle 14 just before the tip of the weft 2 reaches the guide hole 11 as shown by the arrow in FIG. is injected obliquely to the axis E of the

Therefore, the weft yarn 2 is reliably inserted by the assistance of the auxiliary nozzle 14.

However, if the direction of injection by this auxiliary nozzle 14 is not appropriate, the desired effect cannot be achieved.

As mentioned above, in conventional devices of this type, it was difficult to adjust the direction of jetting by this auxiliary nozzle, but in the present invention, the warp threads are separated into the body 13 and the auxiliary nozzle 14, respectively. Since it is configured on the body, auxiliary nozzle 1
4 can be set correctly, and the warp thread body 13 can also be set in all appropriate positions and orientations.

In other words, since the warp thread body 13 does not need to be moved at all after being properly fixed to the reed holder 6 as shown in the embodiment, the warp threads 1 can always be moved in an ideal manner.

Furthermore, by loosening the nut 21 shown in the embodiment, the auxiliary nozzle 14 can slide and rotate with respect to the holder 20, so the position and direction of the injection port 15 provided in the auxiliary nozzle 14 can be freely adjusted. I can do it.

Then, by tightening the nut 21, the auxiliary nozzle 14 can be securely fixed to the reed holder 6.
According to the present invention, an excellent effect can be obtained in that the spray direction of the auxiliary nozzle 14 can be easily adjusted to an appropriate state.

Further, since the auxiliary nozzle 14 moves the warp between the warp yarns that have been raked by the body 13, the top of the auxiliary nozzle 14 does not directly rake through the warp rows.

In addition, during the reeding process, as shown in FIG. 7, the warp thread of the weft thread 2 is sometimes located at the part where the end face 13c of the body 13 connects to the end face 13d, as is clear from the figure. Since this part stands smoothly and continuously, it does not act like a hook, so weft thread 2
passes through the gap 10 and is beaten.

At the time of beating the reed, the auxiliary nozzle 14 and the warp part are the body 13.
is pulled out from the warp row while making sliding contact with the warp threads 1, but there is no risk that the warp threads 1 will be caught in this case either.

Further, as shown in FIGS. 4 to 7, the auxiliary nozzle 14 may overlap the guide hole 11 of the guide element 9 when viewed from the weft insertion nozzle side, but if it protrudes too far into the guide hole 11, there is a risk that the weft thread 2 may be caught. There is.

Therefore, the allowable amount of protrusion is approximately the diameter of the auxiliary nozzle 14.

Further, if the diameter of the auxiliary nozzle 14 is smaller than the thickness of the body 13, the head of the nozzle 14 does not need to be particularly smooth;
If the thickness is greater than 3, the head of the nozzle 14 is preferably formed into a conical or spherical shape.

Further, the cross-sectional shape of the auxiliary nozzle 14 may be not only circular but also square, hexagonal, etc., but in any case, it is preferable that the corners be rounded.

The embodiments shown in FIGS. 9 and 10 are examples in which the auxiliary nozzle 1 is set so that the auxiliary nozzle 1 does not protrude into the guide hole 11 of the guide 9. In this way, the airflow inside the guide hole 11 is This has the effect of improving flow and removing obstacles to the weft 2.

Further, in the embodiment shown in FIGS. 11 and 12, the injection direction from the ejection port 15 of the auxiliary nozzle 14 is as shown by the arrow F, and a component moving away from the gap 10 is produced, so that the center of the flow velocity of the injection airflow is centered at the gap. It can be done in the part far from 10.

Therefore, there is an advantage that the weft yarn 2 has fewer chances of escaping by riding on the airflow leaking from the gap 10.

Furthermore, FIGS. 13 and 14 are examples in which the present invention is applied to a loom having semicircular grooves 5b for guiding the jet air in the reed 5; Since it can also be applied, it has the advantage of wide range of use.

As described above, in the device of the present invention, the auxiliary nozzle 14 enters into the gap between the warp threads 1 that have been raked by the body 13. There is no need for processing.

Therefore, even if the direction of the spout 15 of the auxiliary nozzle 14 is changed, the action of the warp threads will not be affected thereby.

Furthermore, since the direction of the jet nozzle 15 can be freely adjusted, there is no need to precisely adjust the jet direction of the jet nozzle 15 so that the jet direction is correct, and there is no need to assemble the jet nozzle 15 precisely.

Therefore, the device of the present invention has the effect of being easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is an elevational view of a conventional air guide, Fig. 2a is an elevational view showing an example of a conventional auxiliary nozzle device, and Fig. 3 is a plan view of the tip of the auxiliary nozzle. 4 is a perspective view of the device of the present invention, FIG. 5 is a vertical sectional view thereof, FIG. 6 is a sectional view taken along line A-A in FIG. 5, and FIG. is an operation explanatory diagram, Figure 8 is a front view of Figure 5,
FIG. 9 is an elevational view showing another embodiment, FIG. 10 is a cross-sectional plan view thereof, FIG. 11 is an elevational sectional view showing another embodiment, and FIG.
The figure is a front view of the main part, FIG. 13 is an elevational view showing still another embodiment, and FIG. 14 is a front view thereof. 1... Warp, 2... Weft, 3...
...Orimae, 4...Woven cloth, 5...Reed, 6
...Lead holder, 9 ...Guide, 1
3...The warp part is the body, 14...Auxiliary nozzle, 15...The injection port.

Claims (1)

[Claims] 1. In a loom equipped with an auxiliary nozzle that sweeps through a warp row and enters a warp opening and injects air for auxiliary weft insertion from an injection port, a warp thread separate from the auxiliary nozzle is provided. 1. A weft insertion device for an air-injection type loom, characterized in that the head of the body is arranged closer to the reed than the injection port. 2. The weft inserting device for an air injection loom according to claim 1, wherein the body of the warp thread member is fixed to the reed holder, and the weft inserting auxiliary nozzle is attached to the reed holder so that its fixed position can be adjusted. 3. The air injection type according to claim 2, wherein the thickness of the body of the warp yarn is made larger or at least equal to the maximum width in the weaving width direction of the auxiliary weft insertion nozzle within the fixed position adjustment range. A weft insertion device for a loom. 4. The weft insertion device for an air-injection type loom according to any one of claims 1 to 3, wherein the warp section is provided with an auxiliary weft insertion nozzle diagonally passing through the body.