JPH0583649B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a fluid switching device for a fluid jet loom.

BACKGROUND OF THE INVENTION In recent years, with the trend toward higher speed weaving machines, fluid jet looms have been increasingly used. In such a loom, it is important to control the fluid jet in the main weft insertion nozzle or in the auxiliary nozzle for assisting the flight of the weft ejected from the nozzle into the warp opening. This control is performed by controlling the opening and closing operations of valves that open and close fluid passages from the fluid supply source to each of the nozzles. Conventionally, the opening and closing operations of valves have been performed by obtaining power from the drive source of the loom via mechanical means (gear mechanism, cam mechanism, etc.). However, when using this control method, it becomes extremely troublesome to change the start and stop of fluid jetting in response to changes in weaving conditions, such as changes in weaving width.

Therefore, a method using an electromagnetic valve mechanism that uses an electromagnetic solenoid to open and close the valve may be considered. According to this control method, the start and stop times of fluid injection are changed by changing the start and stop times of energization to the electromagnetic solenoid, so fluid injection can be controlled very easily. The use of electromagnetic valve mechanisms also means that automation of the loom can be accommodated.

Conventionally, as an electromagnetic valve mechanism, those shown in FIGS. 1 and 2 have been used. When the solenoid 2 in the container 1 is energized and the plunger 3 is attracted to the core 4, the plunger pin 3a is moved as shown in FIG.
pushes down the valve 7 against the spring 6 in the housing 5, opening the fluid passage. and,
The fluid flows from the input port 5a to the output port 5b as shown by the arrow in the figure. When the solenoid 2 is demagnetized, the valve 7 is pushed upward by the spring 6, closing the fluid passage.

In this mechanism, as the solenoid 2 is excited and demagnetized, the plunger 3 collides with the core 4 and slides on the inner peripheral surface of the guide cylinder 8, and the plunger pin 3a slides inside the core 4. The structure on the side is complex and prone to damage and wear. Therefore, when the conventional electromagnetic valve mechanism is used to control the fluid injection in a fluid injection loom (it is necessary to open and close the valve approximately 500 to 1000 times per minute), the solenoid side may be damaged or deteriorated in a short period of time. However, the electromagnetic valve mechanism becomes unusable in a short period of time.

Further, as the solenoid 2 is demagnetized, the valve 7 returns to the state of closing the fluid passage, but since this return action is performed by the spring 6, the response is poor and there is a risk that it will not be able to follow the high-speed operation of the fluid injection type loom. be.

Furthermore, since the fluid passage cross-sectional area when the fluid passage is open is determined with the plunger 3 adsorbed to the core 4, the amount of fluid jetted within a set time can only be changed by changing the fluid pressure. There is no such method, and such a control method is virtually impossible.

Purpose The present invention has been made in consideration of the above-mentioned problems, and its purpose is to reduce the amount of valve movement as much as possible in order to reduce the impact when the valve is stopped and the wear on the sliding parts. It is an object of the present invention to provide a fluid switching device for a fluid jet loom that can adjust the fluid flow to an optimum flow rate and has a simple structure.

Configuration To achieve this object, the present invention provides an electromagnetic valve interposed between a fluid source and an injection part of a fluid injection loom, and a valve for opening and closing a fluid passage formed in the electromagnetic valve; Consisting of a single movable member made of a magnet directly connected to the valve, and a pair of solenoids that are arranged opposite to each other in the moving direction of the movable member and generate a magnetic field for opening and a magnetic field for closing the valve, Both solenoids are electrically connected by the same winding wire, the winding directions of the coils are set in opposite directions, and the mounting position of the stop means for regulating the amount of movement of the movable body and the valve can be adjusted. We adopted a configuration in which

Embodiment Examples 3 to 6 below are examples embodying the present invention.
To explain based on the figure, weft supply section (not shown)
The weft Y supplied from the gripper 30 is opened and closed in synchronization with the weft insertion timing, and is ejected on the jet fluid from the weft insertion main nozzle 31. The weft yarn Y ejected from the nozzle 31 is transferred to the weft yarn guides 33 and 34 arranged in parallel on the slay 32.
The auxiliary nozzle 35 is inserted into the weft guide path S formed by the weft guide 34 and is erected in opposition to the weft guide 34.
It is assisted in flight by a jet of fluid from.

The fluid injected from the main nozzle 31 is supplied from the first air tank 36 via the fluid switching device 37, and the fluid injected from the auxiliary nozzle 35 is supplied from the second air tank 38 to the fluid switching device 39 (in FIG. (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.
The fluid switching device 39 is configured to sequentially open and close the fluid passage from the weft insertion side to the opposite weft insertion side in synchronization with the flying timing of the weft yarn Y.

Since each of the fluid switching devices 37 and 39 has the same structure, the fluid switching device 37 for the main nozzle 31 will be described next.

A pair of solenoids 10 and 11 are arranged facing each other in series in the container 9, and both solenoids 1
Between 0 and 11, the magnet 12 is connected to the bearing 13,
14, it is fixed to a shaft 15 which is supported so as to be slidable in the vertical direction. Both solenoids 10 and 11 are electrically connected by the same winding, but the winding directions of the coils in each solenoid 10 and 11 are set to be opposite to each other.
When both solenoids 10 and 11 are energized, the same magnetic poles are generated on opposite sides of both solenoids 10 and 11.

A housing 16 is fixed to the lower end of the container 9, and the shaft 1 is placed inside the housing 16.
The valve 17 connected and fixed to the shaft 15
It is provided so as to be slidable in the same direction as the housing 16, so that the fluid passage within the housing 16 can be opened and closed. The valve 17 is prevented from moving downward by a stop mechanism consisting of a screw 19 and a lock nut 20 provided on the cover 18.

Now, as shown in Figure 6a, negative voltage (-V1)
is applied to the solenoids 10 and 11, and the fourth
As shown in the figure, the magnet 12 connects to the solenoid 1.
It is suctioned and held on the 0 side, and the valve 17 closes the fluid passage. Negative voltage (-
When V1) is switched to a positive voltage (+V2), the magnetic poles on the opposing sides of each solenoid 10 and 11 are reversed to generate a magnetic field for opening the valve, and the magnet 12 is repelled from the solenoid 10 side and the solenoid 11 side. is attracted to. Therefore, magnet 1
2 moves toward the solenoid 11 as shown in FIG. 5, and the valve 17 is stopped from moving while in contact with the screw 19, opening the fluid passage. As a result, the fluid supplied from the first air tank 36 is
As shown in FIG. 3, the weft flows from the input port 16a side to the output port 16b side with a slight delay from the rotation angle θ1 of the loom, and is sprayed from the weft insertion main nozzle 31.
The positive voltage (+V2) is switched to a 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 attracted and held to the solenoid 11 side, and the fluid passage is kept open.

When the positive voltage (+V1) is switched to negative voltage (-V2) at the rotation angle θ3 of the loom, the magnetic poles on the opposing sides of both solenoids 10 and 11 are reversed, a magnetic field for valve closing is generated, and the magnet 12 is As well as being repelled from the solenoid 11 side, the solenoid 10
It is attracted to the side. Therefore, the magnet 12 moves toward the solenoid 10, and the valve 17 closes the fluid passage. As a result, the supply of fluid is stopped slightly later than the rotation angle θ3 of the loom, as shown in FIG. 6b, and the fluid jetting from the weft insertion main nozzle 31 is stopped. The negative voltage (-V2) is switched to a negative voltage (-V1) for attracting and holding the magnet 12 at the rotation angle θ4 of the loom.
2 is suctioned and held on the solenoid 10 side, and the fluid passage is held in a closed state.

Subsequent fluid injection from the weft insertion 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 fluid can be adjusted to the optimum amount with as little valve movement as possible, and there is no collision part at all. Therefore, damage and wear on the solenoid side are very effectively prevented, and the fluid switching device of the present invention can sufficiently withstand high-speed operation and long-term use in fluid jet looms.

Note that it is desirable that the housing 16 and the valve 17 be made of a material with excellent self-lubricating properties and wear resistance. For example, a combination in which the housing 16 is made of copper or stainless steel and the valve 17 is made of polyimide resin can be considered.

In addition, since the fluid passage opening and closing operations of the valve 17 are actively performed based on the magnetic pole reversal 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 injection type loom. .

Incidentally, in this embodiment, a stop mechanism consisting of a screw 19 and a lock nut 20 is provided facing the valve 17. Therefore, the amount of movement of the valve 17 can be adjusted by adjusting the stop mechanism. The amount of movement of the valve 17 is adjusted as appropriate depending on the pressure of the fluid or the weaving conditions, ie, the width of the woven fabric, the type of weft, etc. Further, when adjusting the movable amount of the valve 17 according to weaving conditions, etc., the movable amount of the valve 17 can be adjusted to the minimum movable amount that can ensure the optimum flow rate of the fluid, and as a result, the life of the valve can be extended. That is, the smaller the amount of movement of the valve 17, the more likely the valve 17 will collide with the screw 19 or the valve 17 will collide with the housing 1.
Collision and sliding with the valve 17 and the housing 16 are reduced, and damage to the valve 17 or the housing 16 is reduced, resulting in an extension of the life of the valve mechanism.

In addition to the above embodiments, the valve stop mechanism also includes:
For example, as shown in FIG. 7, a stop ring 21 and a lock nut 22 may be screwed onto the shaft 15 on the solenoid side.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the cores may be inserted into the solenoids 10 and 11 without contacting the magnet 12. Further, in the embodiment described above, a negative voltage (-V1) for attracting and holding the magnet was applied to the solenoids 10 and 11 even when the fluid passage was open.
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.

Effects As detailed above, the present invention has a pair of solenoids arranged facing each other in series, and a movable member that moves due to the action of magnetism is arranged between the two solenoids. A valve for opening a fluid passage is connected to the movable member that moves linearly in a reciprocating manner, and a stop means is provided for regulating and stopping the valve linearly moving in the direction of opening the fluid passage so that the amount of movement can be adjusted. Although it has a simple structure, it has the effect of being able to set the optimum valve movement amount as small as possible for the required amount of fluid, and is excellent for industrial use as a fluid switching device in fluid injection looms. This is a great invention.

[Brief explanation of drawings]

Fig. 1 is a joint sectional view showing a conventional electromagnetic valve mechanism, Fig. 2 is a longitudinal sectional view showing the operating state of the same mechanism,
3 to 5 show an embodiment embodying the present invention, FIG. 3 is a perspective view of the main part showing the passage system of the jetted fluid, and FIG. 4 is a longitudinal section showing the fluid passage closed state in the fluid switching device. 5 is a vertical sectional view showing the fluid passage in the open state, FIG. 6 a is a graph showing the applied voltage, FIG. 6 b is a graph showing the fluid ejection state, and FIG. 7 is another example of the present invention. FIG. Solenoid...10, 11, magnet...12,
Valve…17, screw…19, lock nut…2
0, 22, stop ring...21, fluid switching device...3
7,39.

Claims (1)

[Claims] 1. An electromagnetic valve interposed between a fluid source and an injection part of a fluid injection loom, including a valve for opening and closing a fluid passage formed in the electromagnetic valve, and a valve directly connected to the valve. It consists of a single movable member made of a magnet, and a pair of solenoids that are arranged opposite to each other in the direction of movement of the movable member and generate a magnetic field for opening and a magnetic field for closing the valve, with both solenoids having the same winding. The present invention is characterized in that it is electrically connected by a wire, the winding directions of the coils are set to be opposite to each other, and a stop means for regulating the amount of movement of the movable body and the valve is provided so that the mounting position thereof can be adjusted. Fluid switching device for fluid jet looms. 2. The fluid switching device for a fluid jet loom according to claim 1, wherein the stop means is comprised of a screw and a lock nut provided opposite to the valve. 3. The fluid switching device for a fluid injection type loom according to claim 1, wherein the stopping means comprises a stop ring and a lock nut screwed onto the shaft supporting the movable member.