JPS5917213B2 - Air supply valve in air injection loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary set distributing air supply valve for supplying pressurized air to each of a plurality of nozzles at a predetermined timing in an air injection type loom.

As a conventional weft inserting device for an air injection loom, weft air is ejected from a main nozzle through a plurality of auxiliary nozzles arranged at appropriate intervals in the weft inserting direction to sequentially eject auxiliary air to the weft. There is a type of air supply device (rotary set distribution type on-off valve) that supplies pressurized air to multiple auxiliary nozzles at predetermined timings. Kaisho 52-530
The one described in Publication No. 62 is known.

This is because arc-shaped grooves 15 communicating with the inside of the tube 3 are formed on the side surfaces of a plurality of sleeves 10 which are hugged and fixed to the rotary tube 3 to which internal pressure air is supplied.
Further, the side surface of each sleeve 10 is in sliding contact with the side surface of a fixed lid 17 that is relatively rotatably inserted into the rotary tube 3, and while the arcuate groove 15 faces the opening 22 formed in the side surface of the lid 17, Pressurized air is supplied to the auxiliary nozzle via the opening 22.

In general, the weft inserting device of an air injection loom (in this case, it is necessary to adjust the air injection timing of each auxiliary nozzle correctly, and also adjust the air injection period of each auxiliary nozzle according to the type of weft). There is a need to.

This is because, for example, a thin yarn such as No. 40 single cotton yarn can be conveyed even with light or small amount of ejected air, whereas a thick and heavy yarn such as No. 12 cotton single yarn can transport only a small amount of ejected air. If the amount of air is not increased, the air cannot be conveyed, so it is necessary to lengthen the air ejection period of each auxiliary nozzle.

However, in the conventional rotary integrated distribution type on-off valve as described in the above-mentioned publication, although the ejection timing can be adjusted by changing the fixed phase of each sleeve 10 with respect to the rotary tube 3, the ejection period is 10, and the ejection period cannot be adjusted unless the sleeve 10 is replaced, making the replacement work troublesome.
Also, replacement parts had to be prepared.

By the way, in general, in a weft insertion device, when manually inserting the weft, the air jetted from the main nozzle is insufficient to insert the weft yarn.

For this reason, in the case of manual weft insertion, it is necessary to blow out air from at least some of the auxiliary nozzles, but this cannot be done with the conventional rotary set distribution type on-off valve alone. In addition to providing bypass piping, a dedicated on-off valve was also provided in this piping, resulting in an increase in costs.

The present invention has been made by focusing on such conventional problems, and its primary purpose is to make it possible to adjust the air injection timing and period extremely easily without replacing parts. The second object is to enable manual weft insertion to be carried out reliably without providing a separate on-off valve.

The present invention will be explained below according to an embodiment shown in FIGS. 1 and 2.

In the figure, reference numeral 1 denotes an inner cylinder made of a thick cylinder, one end of which is closed and equipped with a shaft 2, the other end is closed by fixing a lid 3 with screws 5, and this lid 3 is equipped with a shaft 6. .

4 is a seal ring. Reference numeral 7 denotes an outer cylinder made of a thin cylinder, which is fitted around the outer periphery of the inner cylinder 1 so as to be rotatable relative to it.

A retaining ring 8 serving as a fastening means is fitted onto the outer peripheral edge of one end of the shaft 2 and the outer cylinder 7, and the outer cylinder 7, the retaining ring 8, and a portion of the C-4 ear 0 are welded together.

Further, the retaining ring 8 is fastened to the shaft 2 by a push screw 9 and to the inner cylinder 1 by a push screw 10, respectively.

Note that the tip of the push screw 10 is designed to abut within the circumferential groove 1b provided in the inner cylinder 1.

Similarly, a retaining ring 8' is attached to the outer peripheral edge of the other end of the shaft 6 and the outer cylinder 7.
are fitted and fixed to the shaft 6 with a push screw 9'.

Therefore, although the inner cylinder 1 and the outer cylinder 7 are integrally fastened, it is possible to rotate them relative to each other by loosening the push screw 9' (or 10).

Reference numeral 8a denotes a hole provided on the outer periphery of the retaining ring 8, which is used when the inner cylinder 1 and the outer cylinder 7 are rotated relative to each other. By moving the inner tube 1 and the outer tube 7, the inner tube 1 and the outer tube 7 are rotated relative to each other.

Holding] The shaft portions of J8 and 8' are rotatably supported by supports 12 and 12' provided upright on the frame 11 of the loom via bearings 13 and 13'.

A gear 14 is fixed to the end of the shaft 2 by a bolt 37, and the shaft 2 is rotated in synchronization with the loom via the gear 14.

The outer periphery of the outer cylinder 7 (here, the suction annular body 15 and the spacer 36
The same number of discharge annular bodies 16a to 16e as the number of auxiliary nozzles (five in this example) are fitted so as to be relatively rotatable.

The discharge annular bodies 161 to 16e are constructed by applying an arc-shaped portion of a bracket 17 erected on the frame 11 to a part of the outer peripheral surface of the discharge annular body 16at as shown in FIG. A screw hole 208 formed in the annular body 16a allows the bolt 19a to be inserted into the elongated hole 18a formed in the arc-shaped portion.
The phase can be adjusted within the range of the elongated hole 18a by loosening the pin 9a.

Incidentally, the suction annular body 15 is similarly fixed to the ship, but there is no need to make the phase adjustable.

A circumferential groove 21 is formed on the inner circumferential surface of the suction annular body 15 , and a space 22 is formed between the circumferential groove 21 and the outer circumferential surface of the outer cylinder 7 . The pipe 24F attached thereto communicates with a pressurized air supply source (not shown).

Further, this space 22 communicates with an air supply chamber 27 in the inner cylinder 1 through a plurality of openings 25 and 26 provided in the outer cylinder 7 and the inner cylinder 1 in the circumferential direction, respectively.

Discharge annular bodies 16a-i 5ef each have discharge holes 2
81 to 28e are formed substantially in a straight line, and flexible pipes 30a to 30e to each auxiliary nozzle are attached to their outer ends via connectors 293 to 29e, respectively.

Further, the discharge holes 28a to 2 are provided in the barrels of the inner cylinder 1 and the outer cylinder 7.
Elongated holes 31a to 31e, 32a to 8ef are formed with phase differences such that they are shifted in the axial direction so as to correspond to each other, and are sequentially overlapped in the circumferential direction.
32e is formed.

Therefore, these openings 31a to 31e and 32a to 32e
As the inner cylinder 1 and the outer cylinder 7 rotate, each set of the inner cylinder 1 and the outer cylinder 7 sequentially face the corresponding discharge holes 28a to 28e. be done.

Furthermore, the cylinder bodies of the inner cylinder 1 and the outer cylinder 7 (here, the opening 31a3
On the same circumference as 2a, 31e, 32e, for example, hole 3
Almost the same phase as 1C, 32C and openings 31b, 32b
and 31d and 32d, the axial positions corresponding to the discharge holes 28a and 286, respectively (manual weft insertion holes 33a, 34a, 33e, 34)
e is formed.

Next, the action will be explained.

During operation of the loom, the inner cylinder 1 is
is rotated in synchronization with the loom, and the lid 3 is integrated with the inner cylinder 1.
The sleeve 7 is also rotated via the shafts 2, 6 and the holding i8.8'.

On the other hand, the pressurized air sent from the pressure air supply source to the pipe 24 flows into the space 22 formed by the circumferential groove 21 of the suction annular body 15 and the outer circumferential surface of the outer cylinder 7, and then flows through the opening 2.
It flows into the air chamber 27 in the inner cylinder 1 through 5° 26 and is stored therein.

Therefore, due to the rotation of the inner cylinder 1 and the outer cylinder 7, the opening 31a,
When 32a faces the discharge hole 28a of the discharge annular body 16a, pressurized air is discharged to the pipe 30a through these and is ejected from the auxiliary nozzle connected thereto.

Then, the openings 31b are sequentially formed. 32b and discharge hole 28b1 opening 31c, 32G and discharge hole 28C1 opening 31d, 32d
The apertures 31e and 32e of the ejection hole 28d1 and the ejection hole 28e face each other, and the water is ejected from the respective auxiliary nozzles.

In this way, the tips of the weft yarns are conveyed and inserted by the auxiliary air sequentially ejected from these auxiliary nozzle groups.

Note that during weft insertion, while the openings 31C and 32C are facing the discharge hole 28C, the manual weft insertion opening 33a.

34a and the discharge hole 28a1, and the openings 33e, 34e and the discharge hole 28e face each other, and temporary gas is ejected from the auxiliary nozzle connected thereto.

Here, if you want to change the air ejection timing of each auxiliary nozzle,
For example, loosen the bolt 19a fixing the discharge annular body 16a to the bracket 17, and move the annular body 16a to the second
In the figure, if the rotation is clockwise (in the direction of force opposite to the rotational direction N of the inner cylinder 1 and outer cylinder 7) I, the ejection timing will be earlier;
If you rotate it counterclockwise, it will slow down, and when the desired phase is reached, you can tighten the pole N9a again to fix it.

In order to change the air injection timing all at once, the bolts 37 may be loosened and the gear 14 and the shaft 2 may be rotated relative to each other.

Also, if you want to change the air ejection period of each auxiliary nozzle,
Loosen the push screws 9 and 10, insert the tool into the hole 8a, and rotate the retaining ring 8 and the outer cylinder 7 relative to the inner cylinder 1.
Openings 21a to 31e on the side and openings 32a to 32 on the outer cylinder 7 side
Adjust the degree of overlap of each set with e.

That is, each set of openings 31a to 31e and 32a to 32e substantially forms a discharge hole at the overlapping portion thereof,
If the two are shifted to reduce the overlapping part, the eruption period will be shortened, and conversely, when the two are perfectly matched as shown in the figure, 1
This will be the longest.

However, for this purpose, it is desirable to make the outer cylinder 7 as thin as possible, with the outer cylinder 7 being as thin as possible in terms of strength.

Furthermore, considering the case of manual weft insertion, the phases of manual weft insertion are hole 33a, 34a1 and hole 31c.
, 32c and the openings 33e and 34e are the discharge holes 28, respectively.
If the phase is set opposite to a, 28c, and 28e, pressurized air will not be ejected all at once from the selected auxiliary nozzle group in this phase, and manual weft insertion can be performed reliably.

During this manual weft insertion, there is no need to insert the weft within a limited period of time unlike during steady operation, and the airflow can be ejected for a long time, so the conveying capacity of each auxiliary nozzle can be fully utilized. The distance between the nozzles can be increased, and even if every other auxiliary nozzle is selected to eject all at once during manual weft insertion as in this embodiment, the weft can be sufficiently transported.

Also, in this case, the air ejection time will be sufficiently long, so
If the weft yarn is exposed to the strong current ejected from all the auxiliary nozzles for a long time, the yarn may become untwisted and break.
If the overall flow force is weakened by ejecting from selected auxiliary nozzles instead of all, this problem will not occur.

Note that manual weft insertion holes 33a, 34a, and 33e.

34e1 Therefore, during steady operation, pressurized air is temporarily ejected from the auxiliary nozzles selected during weft insertion, but an air current is generated over almost the entire length of weft insertion during weft insertion. This has the advantage that the air flow resistance can be reduced.

[As explained above] According to the present invention, the air injection timing and period can be changed extremely easily without replacing any parts, and in addition, manual weft insertion can be performed without separately providing a dedicated on-off valve. This has the effect of ensuring that the

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and FIG. 1 is a front longitudinal sectional view;
FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1. 1...Inner cylinder, 7...Outer cylinder, 8, 8'.
...Retaining ring, 9.9', 10... Push screw, 11... Loom frame, 16a to 16e
... Discharge annular body, 17 ... Bracket, 18a ... Long hole, 19a ... Bolt, 27 ... Air supply chamber, 28a-28e...
...Discharge holes, 31a to 31e, 32a to 32e...
...Opening holes, 33a, 33e, 34a, 34e...
...Hole for manual weft insertion.

Claims (1)

[Scope of Claims] 1. An inner cylinder having an air chamber connected to a pressurized air supply source therein and an outer cylinder rotatably fitted into each other, and a series of through holes passing through the cylinder bodies of these inner cylinders. are arranged in the axial direction with sequential phase shifts, and a fastening means for fastening these two cylinders to each other is provided so that the two cylinders are rotated in synchronization with the loom, and each of the outer cylinders is connected to an auxiliary nozzle. A plurality of annular bodies having connected discharge holes are rotatably fitted to each other so that each of the discharge holes corresponds to the through hole arrangement portion, and a fixing means is provided for fixing each of the annular bodies at a desired rotational position. An air supply valve for an air injection type loom. 2. An outer cylinder is rotatably fitted into an inner cylinder which has an air supply chamber connected to a pressure supply source inside, and a series of through holes passing through the cylinder bodies of both cylinders are sequentially shifted in phase and arranged in an axial direction. and at least some of these through holes and another through hole on the same circumference on the cylinder body are arranged in the same phase,
A fastening means for fastening these two cylinders to each other is provided so that the two cylinders are rotated in synchronization with the loom, and a plurality of annular bodies each having a discharge hole connected to an auxiliary nozzle are rotated in the outer cylinder. An air injection type loom E is provided with fixing means for fixing each annular body at a desired rotational position, the discharge holes being respectively fitted to the through hole arrangement portions, and fixing means for fixing each annular body at a desired rotational position. valve.