JPS5913270Y2 - Air path interrupter for air injection looms - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an air path interrupting device for an air jet loom.

As a conventional air path disconnection device, for example, Japanese Patent Application Laid-open No. 53-
There is something like the one shown in No. 14868.

In other words, pressurized air from a pressure air supply source is fed through an electromagnetic on-off valve that closes only when the loom is stopped, for approximately one weft insertion (
Pressurized air (for one pick) is fed into an air tank that stores it, and from this tank the pressurized air is supplied to the weft insertion nozzle via an on-off valve that opens in synchronization with the weft insertion time. The electromagnetic on-off valve is provided to prevent pressurized air from continuously blowing out when the loom stops in the middle phase.

In order to facilitate various operations after stopping, the loom is set to stop at the time of weft insertion in the weaving phase following the weaving phase in which the stop signal was issued, so at the time of weft insertion (while stopped)
The operating circuit of the electromagnetic on-off valve is set so that the air injection from the weft insertion nozzle is completely performed during restart, and so that air injection is not performed even when starting from the stop phase when restarting. It is.

However, in such a conventional air path interrupting device, two on-off valves must be provided and operated separately, and a separate operating device is required, making the device large and expensive. As mentioned above, the electromagnetic on-off valve installed between the pressurized air supply source and the air tank is designed to ensure that air is completely injected from the weft insertion nozzle when stopped, and when restarted. The operating circuit must be set so that air injection is not performed during the first weft insertion.
There were problems in that the structure was complicated and expensive.

The present invention was developed by focusing on these conventional problems, and includes an on-off valve that conducts only when the weft is not inserted between the pressurized air supply source and the air tank. To solve the above-mentioned problems by providing an air path disconnection device configured to operate in conjunction with an on-off valve that is interposed between the tank and the weft insertion nozzle and conducts only during weft insertion. It is an object.

The present invention will be explained below based on the illustrated embodiments.

In Fig. 1, 1 is a compressor as a pressure air supply source, 2 is a check valve, 3 is a regulator, 4 is an air path interrupter, 5 is an air tank that stores approximately one pick's worth of pressurized air, and 6 is a It is a nozzle.

Further, 7 is a weft, 8 is a reed, 9 is a guide which is arranged in a row in the weft insertion direction at a predetermined interval, and 10 is a holder to which the bases of the reed 8 and the guide 9 are fixed.

The air path interrupting device 4 includes a sliding hole 11 and conduction holes 12 a , 12 b and 13 a , 13 substantially perpendicular thereto.
b, a spool valve stem 17 that is slidably fitted into the sliding hole 11 and has annular communication grooves 15 and 16 formed at two intermediate portions, and the sliding hole. An adjusting screw 19 is screwed onto one end of the valve rod 11 and fixed with a lock nut 18, and is interposed between the adjusting screw 19 and one end of the valve rod 17 to urge the valve rod 17 to the left in the figure. compression spring 20
A cam roller 22 is pivotally connected to the other end, that is, a protruding end, of the valve stem 17 by a pin 21, and a cam 24 is fixed to a rotating shaft 23 that rotates in synchronization with the loom.

The cam roller 22 is brought into contact with the cam 24 by the biasing force of the spring 20.

This cam 24 is formed with a high part 24a and a low part 24b, and the high part 24a and the cam roller 22 are formed during weft insertion.
and are in contact with each other.

At this time, the communication groove 16 of the valve stem 17 is connected to the communication hole 13a.
, 13b so that they communicate with each other, and when the lower portion 24b and the cam roller 22 come into contact, the communication groove 15 faces the conduction grooves 12a, 12b so that they communicate with each other. It has become.

A pipe 25 from the regulator 3 is connected by screwing into the through hole 12a.

Then, the pipe 26 is screwed and connected to the conduction hole 12b.
is connected to the inlet hole 27 of the air tank 5.

Further, a pipe 29 which is screwed and connected to the outlet hole 28 of the air tank 5 is screwed and connected to the through hole 13a.

A pipe 30 leading to the weft insertion nozzle 6 is screwed and connected to the through hole 13b.

31 is a lock nut. A capacity adjustment screw 32 is screwed into the air tank 5 so as to project inward, and is fixed with a lock nut 33.

Next, the effect will be explained.

During weft insertion, the high part 24a of the cam 24 and the cam roller 22 come into contact with each other, so the valve stem 17 is pushed to the right in the figure, and the communication holes 13a and 13b communicate with each other through the communication groove 16. Further, since the conduction holes 12 a and 12 b are blocked, the pressurized air stored in the air tank 5 passes through the outlet hole 28 , the pipe 29 , the conduction hole 13 a , the communication groove 16 , the conduction hole 13 b , and the pipe 30 . It is supplied to the weft insertion nozzle 6, where it is jetted together with the weft yarn 7.

When the weft insertion is finished, the lower part 24b of the cam 24 and the cam roller 22 come into contact with each other, so that the valve stem 17 protrudes to the left in the figure, and the communication holes 12a and 12b communicate with each other through the communication groove 15. , the conduction holes 13 a and 13 b are blocked.

On the other hand, since the compressed air produced by the compressor 1 is sent to the regulator 3 via the check valve 2, the air adjusted to the optimum pressure by the regulator 3 is supplied from the pipe 25 to the through hole 12a, Communication hole 15. Conduction hole 1
2b, the vibe 269 flows into the air tank 5 through the artificial hole 27, and is stored for one pick.

Then, when the time for weft insertion comes again, weft insertion is performed as described above.

When the loom stops at the timing of weft insertion, pressurized air for one pick stored in the air tank 5 is injected at the time of weft insertion, thereby ensuring reliable weft insertion.

After the loom has stopped, even if it starts from the timing of weft insertion when restarting, the air tank 5
is empty and the path between the pressurized air supply source and the air tank 5 is closed by the valve rod 17, so air injection is not performed until the next weft insertion timing.

FIG. 2 shows another embodiment.

This embodiment is a rotary valve type air path disconnection device having two on-off valve parts, and the same parts as in the previous embodiment are given the same reference numerals, and only the different parts will be explained.

The valve housing 40 of this air path interrupter N4' has a sliding hole 41 and conductive holes 42 arranged in a straight line and perpendicular to the sliding hole 41.
a , 42 b , 43 a , and 43 b are formed, and a valve body 44 is rotatably inserted into the sliding hole 41 .

45 and 46 are lid members. A gear 48 is fixed to a shaft 47 that protrudes from the end of the valve body 44 and passes through the lid member 45, and a gear 50 that is fixed to a rotating shaft 49 driven by a loom meshes with this gear 48. The valve body 44 rotates once per revolution of the loom.

The circumferential surface of the valve body 44 is shown in FIG. 3 (a developed view of the circumferential surface of the valve body 44).
As shown in FIG.
A communication groove 51 that faces the conductive holes 42 a and 42 b and communicates them most of the time other than when weft insertion is formed, and a communication groove 52 that faces the conductive holes 42 a and 42 b and communicates them.

In addition, the pipe 25 from the regulator is connected to the conduction hole 42a.
, the pipe 26 to the air tank is connected to the conduction hole 42b,
The pipe 29 from the air tank is connected to the through hole 43a, and the pipe 30 to the weft insertion nozzle is connected to the through hole 43b.
Each is connected.

Even with this configuration, during weft insertion, the communication groove 51 and the through holes 43a, 43b face each other and communicate with each other, and the through holes 42a, 42b are blocked, so that the air inside the air tank Pressurized air is injected from the nozzle to perform weft insertion.

In addition, except when inserting the weft, the communication groove 52 and the communication hole 42a,
42 b and these communicate with each other, and the conductive hole 43 a
, 43b are shut off, so pressurized air is stored in the air tank.

Therefore, even if the loom stops at the timing of weft insertion, no air will be ejected after the pressurized air for one pick in the air tank is blown out, and when the loom is restarted, the loom will be Since the air tank is empty even when it is time to put it in, it will not blow out.

Incidentally, such a rotary valve type has the advantage of providing smooth operation.

As explained above, the present invention stores pressurized air for approximately one pick in the air tank at times other than weft insertion, cuts off the supply of compressed air from the pressure air supply source to the air tank during weft insertion, and connects the air tank and the weft to the air tank. Since it is configured to communicate with the weft insertion nozzle, pressurized air is not continuously ejected even if the machine is stopped during weft insertion, and it is not ejected at the first pick when restarting.

In addition, the opening and closing operations between the pressurized air supply source and the air tank, and between the tank air and the weft insertion nozzle are mechanically linked, so the structure is simple, the operation is reliable, and it is also inexpensive. .

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view showing another embodiment, and FIG. 3 is a developed view of the circumferential surface of the valve body in the same embodiment. 1...Compressor, 4.4'...Air path interrupter, 5...Air tank, 6...
...Weft insertion nozzle.

Claims (1)

[Scope of utility model registration request] An air tank comprising an air tank that stores pressurized air for approximately one weft insertion between a pressurized air supply source and a weft insertion nozzle, and an on-off valve that connects a path from the air tank to the nozzle only during weft insertion. In the injection type loom, an on-off valve is provided between the pressurized air supply source and the tank to allow conduction between the pressure air supply source and the tank only when the weft is not inserted, and these two on-off valves are configured to operate in conjunction with each other. An air path interrupting device for an air injection loom, characterized by: