JPS5846135Y2 - Opening/closing valve control device for air injection looms - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for controlling air injection from a weft insertion nozzle in an air injection loom.

For example, in air injection looms in which the weft insertion nozzle is fixed to a reed and the nozzle is moved while inserting the weft, a weft insertion nozzle is attached to the main shaft to control the timing of air injection from the weft insertion nozzle. The cam controls the opening/closing valve of the injection air.

By the way, the main shaft of a conventional loom is disposed approximately in the center of the loom because it drives a beating device, a winding device, a feeding device, and the like.

Furthermore, in the case of an air-injection type loom, since the weft traction force is selected depending on the strength of the weft, it is necessary to change the timing of air injection from the main nozzle.

For example, when using a weak weft, the weft traction force is weakened, so it is necessary to adjust the weft insertion time to make it as long as possible.

For this reason, it is necessary to start spraying air from the weft insertion nozzle when the warp shedding amount reaches a point where weft insertion is possible, and to continue jetting air until the weft opening amount reaches a point where weft insertion is impossible.

However, in air injection looms in which the weft insertion nozzle is moved integrally with the reed to insert the weft, a flexible tube is used for piping from the on-off valve to the main nozzle, so it is necessary to extend the life of this flexible tube. Therefore, it is necessary to attach a cam to the main shaft in the center of the loom, which is the center of rotation of the nozzle, for the on-off valve, so in order to adjust the injection timing, the loom must be rotated manually by turning the timing wheel. , when the warp opening amount is such that weft insertion is possible, the operation is stopped, and then the phase of the cam is adjusted so that air is blown out at this point, and then again when the warp opening amount is such that weft insertion becomes impossible. The cam must be phased to stop and stop blowing out air.

At this time, as described above, if you rotate the timing wheel to match the above-mentioned phase and then release your hand from the timing wheel to match the above-mentioned cam phase, the main shaft will not rotate. Therefore, there was a problem in that the timing wheel had to be operated again to readjust the phase.

To prevent this problem, all you have to do is hold the timing wheel with one hand, but as mentioned above, in conventional looms, the cam attached to the main shaft is located deep inside the loom, so it is necessary to adjust the cam. To do this, you had to insert your hand deep into the loom, and it was impossible to hold the timing wheel with one hand.

Furthermore, the air injection from the weft insertion nozzle starts when the weft thread slightly protruding from the nozzle tip is stretched straight by the air injection, that is, when the air opening/closing valve is fully opened. You can't tell when it starts unless you look at the weft.

However, in conventional looms, as described above, the worker's face is turned sideways because he or she has to insert his or her hand deeply to adjust the cam, which makes it difficult to see the tip of the nozzle.

In order to eliminate the above-mentioned drawbacks, the weft insertion nozzle may have a built-in on-off valve for air control, but in this case, the valve stem must come into contact with a fixed member to open and close the valve. However, the reciprocating speed of the reed to which the weft insertion nozzle is attached is high, and the valve stem hits the valve with impact, which is undesirable because it reduces the durability of the valve.

This invention was devised in order to solve the problems of the conventional device as described above, and it is designed to accurately and easily adjust the timing of air injection from the weft insertion nozzle (the purpose is to scrape). For this purpose, a timing wheel is installed near the weft insertion nozzle, and an on-off valve control is installed between the frame near the nozzle and the edge of the woven fabric, on the presto beam side of the main shaft where the timing wheel is attached. By installing a cam so that the timing wheel and the opening/closing valve control cam can be handled with one hand at the same time, the timing wheel can be fixed with one hand while
This allows you to adjust the cam phase with your other hand while looking at the nozzle.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 is the frame of the air injection loom, 2 is the top stay that connects the frames 1 on both sides, 3 is the angled presto beam, 4 is the main shaft, 5 is the slate shaft, and 6 is the lower end connected to the thread sword shaft 5. A pivoted thread sword, 7, a pivot shaft that pivots in conjunction with the weaving movement, 8
1 is a swinging rod fixed to the swinging shaft 7, 9 is a connecting rod connecting the swinging rod 8 and the upper end of the thread sword 6, 10 is a reed holder fixed to the upper end of the thread sword 6, 11 is a reed, and 12 is a reed holder. 10 is the fixed weft insertion nozzle, 13 is the nozzle 12
14 is a heddle, 15 is a warp, 16 is a weft, 17 is a weft gripper, 18 is a woven fabric, 19
20 is a woven fabric, 20 is a surface roller, 21 is a press roller, 22 is a bend bar, and 23 is a cross roller.

In the present invention, the timing wheel 24 is fixed to the end of the main shaft 4 protruding outward from the frame 1 near the weft insertion nozzle 12, and the timing wheel 24 is
Thread sword shaft 5 inside the frame 1 on the second side
A weft insertion injection air on/off valve 25 is fixed to the frame 1 at a position close to the frame 1, and as shown in FIG. Connecting.

The solenoid on-off valve 28 is opened when the loom is in operation and closed when the loom is stopped, and a foot valve 29 is connected in parallel with the solenoid valve 28.
and the orifice 30 are connected in series.

Note that the foot valve 29 is preferably installed at the side end of the frame 1.

Then, the discharge port of the on-off valve 25 and the nozzle 12 are connected by a flexible hose 31.

Further, the intermediate portion of a lever 33 is rotatably supported on a fixed shaft 32 protruding inward from the frame 1, and a bolt 34 screwed into the lower end portion of this lever 33 is individually secured with a lock nut 35, and a lock nut 35 is used to secure the opening/closing valve. Attach the bolt 3 to the end of the slide valve 25a of 25.
4 facing each other.

The slide valve 25a is biased to close by a built-in spring.

Also, the frame 1 near the weft insertion nozzle 12 and the woven fabric 19
A cam 36 for controlling an on-off valve for weft insertion injection air is provided between the weft edge 19a and the weft edge 19a.

This cam 36 consists of a pair of cam plates 36 a and 36 b, and a slotted groove 37 (see FIG. 1) is formed in the boss portion of the cam plate 36 a, so that the cam plate 36 a and the cam plate 36 b have a slot 37 (see FIG. The boss portion is fitted onto a rotary shaft 38 which is disposed in and rotates in conjunction with the weaving movement, and the boss portion is fastened to the shaft 38 by a fastener 39.

Further, the cam plate 36b has arc-shaped long holes 40a, 40
b, and insert the set screws 41 into the long holes 40a, 40b.
By screwing into the cam plate 36a through the cam plate 36a, the cam plates 36a and 36b can be fixed in an arbitrary phase.

A cam roller 4 is attached to the upper end of the lever 33.
2, a pin 43 protruding from the top stay 2 and a lever 33
The cam 36 is brought into pressure contact with the cam 36 by a spring 44 stretched between the upper parts of the cam 36.

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

To adjust the opening/closing timing of the on-off valve 25 with this device, first rotate the timing wheel 24 with your left hand to operate the loom manually, and when the reed 11 moves back, the opening amount of the warp threads 15 is large enough to allow weft insertion. (in this embodiment, when the warp yarns 15 no longer overlap the guide holes of the guide element 13), the timing wheel 24 is stopped from rotating, and the phase of the timing wheel 24 is held with the left hand.

Next, loosen the fastener 39 of the cam 36 with your right hand and remove the cam plate 36.
The phase of the cam roller 4 is changed by changing the phase of the cam plate 36 a.
2 and rotate the lever 33 counterclockwise in FIG. Press the foot valve 29 to open it, and the air reduced in pressure by the orifice 30 is transferred to the pipe 26.
, pressurized air is supplied to the on-off valve 25 via the accumulator 27.

Then, a position is found where the tip of the weft yarn 16 protruding from the nozzle 12 does not meander but extends straight for the first time, and the fastener 39 is tightened to fix the cam plate 36a to the rotating shaft 38.

Next, rotate the timing wheel 24 manually and move the reed 11.
The phase of the cam plate 36b is determined so that the opening/closing valve 25 closes one step before weft insertion becomes impossible (just before the warp threads 15 overlap the guide hole of the guide element 13) when the weft inserter moves forward.

That is, at this time as well, hold the timing wheel 24 with your left hand, loosen the screw 41 with your right hand, and then tighten the cam plate 36.
b is rotated from the peak to the valley with respect to the cam roller 42, and the screw 41 is tightened at the phase in which the weft thread 16 protruding from the nozzle 12 meanders for the first time to fix the cam plate 36b to the cam plate 36a.

Timing adjustment is completed with the above operations.

As mentioned above, the device of the present invention has a cam for controlling the on-off valve between the frame near the nozzle and the edge of the woven fabric on the presto beam side of the main shaft, and controls the timing wheel while observing the situation near the nozzle. Since the cams can be operated simultaneously, even if weaving is temporarily interrupted to make adjustments, the opening/closing timing of the weft insertion injection air opening/closing valve can be easily and accurately set without being disturbed by the woven fabric. It has an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a partial plan view of an air injection loom equipped with the device of the present invention, and FIG. 2 is a complete sectional view thereof. 1... Air injection loom frame, 4...
... Main shaft, 5 ... Thread sword shaft, 6 ... Thread sword, 10 ... Reed holder, 11 ... Reed, 12 ...・Weft insertion nozzle, 13...Guide, 14...
・Heddle, 15... Warp, 16... Weft, 17... Weft gripper, 18... Orimae, 19... Weaving Cloth, 19 a... Woven edge,
24... Timing wheel, 25...
Weft insertion injection air opening/closing valve, 25 a...Slide valve, 26...Pipe, 27...
・Accumulator, 28...Solenoid on/off valve, 2
9...Foot valve, 31...Flexible hose, 33...Lever, 36...
・・Cam for controlling the opening/closing valve of the injection air for weft insertion, 36a, 3
6b...Cam plate, 38...Rotating shaft, 4
2...Cam roller, 44...Spring.

Claims (1)

[Scope of utility model registration request] In an air injection loom that inserts the weft while moving the weft insertion nozzle, the weft insertion jet is installed between the frame and the edge of the woven fabric, which is closer to the presto beam than the main shaft and near the weft insertion nozzle. An on-off valve control device for an air injection loom, which is equipped with a cam for controlling the air on-off valve.