JPH0641658B2 - Fluid switching device for fluid jet loom - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fluid switching device in a fluid jet loom.

2. Description of the Related Art In recent years, with the trend toward higher speeds of looms, there is a tendency for fluid jet looms to be used frequently. In such a loom, it is important to control the fluid injection in the main nozzle for weft insertion or the auxiliary nozzle for assisting the flight of the weft yarn injected into the warp opening from the nozzle. This control is performed by controlling the opening / closing operation of the valve that opens / closes the fluid passage from the fluid supply source to each nozzle. Conventionally, the opening / closing operation of a valve has been performed by obtaining its power from a drive source of a loom through mechanical means (a gear mechanism, a cam mechanism, or the like). However, in the case of this control method, it is very troublesome to change the weaving condition, for example, the change at the time of starting and stopping the fluid injection in accordance with the change of the weaving width.

Therefore, a method using an electromagnetic valve mechanism in which the valve is opened and closed by an electromagnetic solenoid is considered. According to this control method, since the change at the time of starting and stopping the fluid injection is performed by the change at the time of starting and stopping the energization of the electromagnetic solenoid, the control of the fluid injection can be performed very easily.
Also, the use of an electromagnetic valve mechanism means that automation of the loom can be accommodated.

Conventionally, the electromagnetic valve mechanism shown in FIGS. 1 and 2 has been used. When the solenoid 2 in the container 1 is excited and the plunger 3 is attracted to the core 4, the plunger pin 3a pushes down the valve 7 against the spring 6 in the housing 5 as shown in FIG. The passage is opened. Then, the fluid enters the input port 5a as shown by the arrow in the figure.
From the output port 5b. When the solenoid 2 is demagnetized, the valve 7 is pushed upward by the spring 6 and the fluid passage is closed.

In this mechanism, the plunger 3 collides with the core 4 along with the excitation / demagnetization of the solenoid 2 and slides on the inner peripheral surface of the guide cylinder 8, and the plunger pin 3a slides in the core 4 and so on. The structure of is complicated and easily damaged or worn. However, when the electromagnetic valve mechanism of the above-mentioned conventional configuration is used for controlling the fluid ejection in the fluid ejection loom (it is necessary to perform the valve opening / closing operation about 500 to 1000 times per minute), the solenoid side is damaged and deteriorated in a short time. However, the electromagnetic valve mechanism becomes unusable in a short time.

Also, with the demagnetization of the solenoid 2, the valve 7 returns to the state in which it closes the fluid passage.
Therefore, the response is poor, and there is a possibility that the high-speed operation of the fluid jet loom cannot be followed.

Therefore, there is a demand for an electromagnetic valve mechanism in which the solenoid side can sufficiently withstand the high-speed operation of the fluid jet loom and can positively perform both the fluid passage opening / closing operation of the valve. In this case, the wear caused by the collision between the valve and the housing due to the positive high-speed operation of the valve affects the life of the valve mechanism. That is, wear at the collision between the housing and the valve hinders proper control of fluid ejection.

The present invention has been made in view of the above problems, and an object thereof is to provide a fluid switching device in a fluid jet loom that can follow the operation of a high-speed loom and has excellent durability.

Structure In order to achieve the above object, according to the present invention, a fluid member is interposed between a fluid source and a jetting unit of a fluid jet loom, and a movable member that reciprocates linearly under the magnetic action of a solenoid and is connected to the movable member. In a solenoid valve having a valve for opening and closing the valve and a stopper portion that is positioned by colliding with the valve when the fluid passage is opened, a guide tube is fixed to one of the movable member and the valve, and the other is inside the guide tube. It is configured to be slidably fitted in and the cushioning means is interposed between the movable member and the valve.

Embodiment An embodiment embodying the present invention will be described below with reference to FIGS. 3 to 6. The weft Y supplied from a weft supply portion (not shown) is opened and closed in synchronization with the weft insertion timing. It is ejected on the jet fluid from the weft inserting main nozzle 31 via 30. A large number of weft yarns Y ejected from the nozzle 31 are arranged on the sley 32.
The wefts are inserted into the weft guide passage S formed by 3, 34, and the jetting fluid is assisted by the jet fluid from an auxiliary nozzle 35 standing upright to face the weft guide 34.

The fluid ejected from the main nozzle 31 is supplied from the first air tank 36 via the fluid switching device 37, and the fluid ejected from the auxiliary nozzle 35 is supplied from the second air tank 38 to the fluid switching device 39 (2 in FIG. 3). Only one is shown and the others are omitted). The fluid switching device 37 opens and closes the fluid passage in synchronization with the weft insertion timing, and the fluid switching device 39 opens and closes the fluid passage sequentially from the weft insertion side to the opposite weft insertion side in synchronization with the flight timing of the weft Y. It is like this.

Since the fluid switching devices 37 and 39 have the same structure, the fluid switching device 37 for the main nozzle 31 will be described below.

A pair of solenoids 10 and 11 are arranged in series in the housing 9 so as to face each other, and a magnet 12 is fixed to a shaft 15 slidably supported in the vertical direction by bearings 13 and 14 between the solenoids 10 and 11. It is worn. Both solenoids 10 and 11 are electrically connected by the same winding, but the winding directions of the solenoids 10 and 11 are set to be opposite to each other, so that when the solenoids 10 and 11 are energized, Both solenoids 10, 11
The same magnetic pole is generated on the opposite side of. A housing 16 is fixed to the lower end of the container 9, and a vibe 17 is housed in the housing 16 so as to be slidable in the same direction as the shaft 15. The valve 17 is slidably fitted in a guide cylinder 18 fixed to the shaft 15, and the spring 1 is interposed between the valve 17 and the shaft 15.
9 is installed. Both ends of the spring 19 are fixed to the shaft 15 and the valve 17, respectively. The valve 17 is positioned by the stopper 20a of the cover 20 and its downward movement is restricted.

Now, as shown in FIG. 6 (a), a negative voltage (-V1) is applied to the solenoids 10 and 11, and as shown in FIG. 17 closes the fluid passage. When the negative voltage (-V1) is switched to the positive voltage (+ V2) at the rotation angle θ1 of the loom, the magnetic poles on the opposite sides of the solenoids 10 and 11 are reversed, and the magnet 12 is repelled from the solenoid 10 side. It is attracted to the solenoid 11 side. Therefore, the magnet 12 moves to the solenoid 11 side as shown in FIG. 5, and the valve 17 opens the fluid passage while being in contact with the stopper portion 20a. In this case, the valve 17
The impact of the spring on the stopper portion 20a is alleviated by the buffering effect of the spring 19. As a result of the opening of the fluid passage in the housing 16, the fluid supplied from the first air tank 36 is slightly delayed from the rotation angle θ1 of the loom as shown in FIG. 6 (b), and then the output port 16b from the input port 16a side. It flows to the side and is jetted from the weft inserting main nozzle 31. The positive voltage (+ V2) is switched to the positive voltage (+ V1) for attracting and holding the magnet 12 at the rotation angle θ2 of the loom, and the application of this positive voltage (+ V1) is continued until the rotation angle θ3 of the loom. During this time, the magnet 12 is suction-held on the solenoid 11 side, and the fluid passage is held open.

At the rotation angle θ3 of the loom, the positive voltage (+ V1) is negative voltage (-V1).
When switched to V2), the opposite magnetic poles of both solenoids 10 and 11 are reversed, and the magnet 12 moves to the solenoid 11
While being repelled from the side, it is attracted to the solenoid 10 side. Therefore, the magnet 12 moves to the solenoid 10 side, and the valve 17 closes the fluid passage. Also in this case,
When the valve 17 collides with the housing 16, the spring 19
Is mitigated by the buffering effect of the above, and wear at the collision portion of the valve 17 and the housing 16 is prevented. As the fluid passage is closed, the fluid supply is stopped after a slight delay from the rotation angle θ3 of the loom as shown in FIG. 6 (b), and the fluid injection from the weft inserting main nozzle 31 is stopped. . The negative voltage (-V2) is switched to the negative voltage (-V1) for attracting and holding the magnet 12 at the rotation angle θ4 of the loom, the magnet 12 is attracted and retained on the solenoid 10 side, and the fluid passage is retained in the closed state. To be done.

Then, the subsequent fluid injection from the weft inserting main nozzle 31 is controlled in the same manner as described above.

In this embodiment, the structure on the solenoid side is simpler than that of the conventional structure, the sliding portion is small, and the collision portion does not exist at all. Also, the valve 17 and the housing 16
The collision with is dampened by the buffer effect of the spring 19. Therefore, abrasion damage on the solenoid side and the valve side can be effectively prevented, and the fluid switching device of the present invention can sufficiently withstand high-speed operation and long-term use in the fluid jet loom.

It is desirable that the housing 16 and the valve 17 are formed of a material having excellent self-lubricating property and abrasion resistance. For example, a combination in which the housing 16 is formed of copper or stainless steel and the valve 17 is formed of a polyimide resin can be considered.

Further, since the fluid passage opening / closing operation of the valve 17 is positively performed based on the reversal of the magnetic poles of the solenoids 10 and 11, the responsiveness is very good and it is possible to sufficiently follow the high speed operation of the fluid jet loom. .

The present invention is not limited to the above-mentioned embodiment, and for example, as shown in FIG. 7, spring receiving portions 17a and 18a are provided at the base end of the valve 17 and the lower end of the guide cylinder 18, respectively.
And a spring 21 for closing the fluid passage is provided between the spring receiving portions 17a and 18a, or the shaft 15
The valve 17 and the valve 17 may be connected by rubber instead of the spring. In this case as well, the same cushioning effect as when the spring is used can be obtained. In addition, in the present invention, the magnet 1
It is also possible to insert cores into the solenoids 10 and 11 without contacting the solenoids 2, or use a magnetic material instead of the magnets 12 to alternately excite the solenoids 10 and 11. Further, the movable amount of the valve 17 may be adjusted by using a bolt and a lock nut instead of the stopper portion 20a. By doing so, the valve is adjusted to the minimum movable amount capable of ensuring the optimum flow rate of the fluid. Therefore, the life of the valve 17 can be further extended.

In the above embodiment, the negative voltage (-V1) for attracting and holding the magnet is applied to the solenoids 10 and 1 even when the fluid passage is opened.
However, since the fluid passage can be held open by the pressure of the fluid, the voltage for attracting and holding the magnet can be omitted when the fluid passage is opened.

Effect As described in detail above, according to the present invention, the magnet or magnetic body that reciprocates linearly under the action of the magnetism of the solenoid is connected to the valve for opening the fluid passage by the buffer means. It is an invention that is excellent in industrial use as a fluid switching device in a fluid jet loom because it has the effects of positively performing all the operations and having good responsiveness and high durability.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional electromagnetic valve mechanism, FIG. 2 is a longitudinal sectional view showing an operating state of the mechanism, and FIGS. 3 to 5 show an embodiment embodying the present invention. FIG. 4 is a perspective view of a main part showing a passage system for ejected fluid, FIG. 4 is a longitudinal sectional view showing a fluid passage closed state in a fluid switching device, and FIG. 5 is a longitudinal sectional view showing the same fluid passage opened state. 6A is a graph showing the applied voltage, FIG. 6B is a graph showing the fluid ejection state, and FIG. 7 is a vertical sectional view showing another example of the present invention. Solenoid: 10, 11, magnet: 12, valve: 17, spring: 19, fluid switching device: 3
7,39.

Claims (3)

[Claims] 1. A movable member that is interposed between a fluid source and a jetting unit of a fluid jet loom and that is reciprocally linearly moved by a magnetic action of a solenoid and that is connected to the movable member to open and close a fluid passage. In a solenoid valve having a stopper portion that is positioned by colliding the valve when the fluid passage is opened, a guide cylinder is fixed to one of the movable member and the valve,
A fluid switching device in a fluid jet loom, characterized in that the other is slidably fitted into a guide cylinder, and a buffer means is interposed between the movable member and the valve. 2. A fluid switching device in a fluid jet loom according to claim 1, wherein the movable member is a magnet or a magnetic body. 3. A fluid switching device in a fluid jet loom according to claim 2, wherein the buffering means is a spring or rubber connecting the shaft supporting the movable member and the magnet.