JPH0235829Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to an air jet loom, and particularly to a control device for a solenoid valve for weft insertion.

Prior Art Air jet looms use a main nozzle and a plurality of sub-nozzles for weft insertion. The sub-nozzles are arranged along the weft insertion direction of the weft yarn, and sequentially urge the weft yarn inserted by the main nozzle across the weaving width.

By the way, if the weave width changes, some of those sub-nozzles will not be used. In such cases, conventional methods include blocking the nozzle piping, setting the mechanical valve to always close, or disconnecting the wiring of the electromagnetic valve. Since such means require complicated work, a simple change means is desired.

Object of the invention and its solution The object of the invention is therefore to make it possible to set the necessary nozzles to an inactive state by electrical means.

Therefore, the present invention focused on the fact that the opening/closing control of the solenoid valve is performed in relation to the rotation angle of the loom, and compared the rotation angle during the opening operation of the solenoid valve with the rotation angle during the closing operation. When the two match, the solenoid valve can be set to a non-operating state. Such control operations can be performed not only by logic circuits but also by using similar programs and computer functions.

Effects of the invention Hereinafter, the configuration of the invention will be specifically explained based on the embodiment shown in the drawings.

First, FIG. 1 shows a piping system as an object to be controlled by a control device 1 of the present invention. Pressure air source 2
is connected to a main nozzle 6 via a pressure regulating valve 3, a main tank 4, and a solenoid valve 5, and is branched to a plurality of groups for each group via a pressure regulating valve 7, a sub tank 8, and a plurality of solenoid valves 9. Sub nozzle 1
Connected to 0.

The main nozzle 6 is provided toward the warp thread path 11 at the weaving end on the weft insertion side,
Further, the sub-nozzle 10 is provided on a straight line along the path 11.

On the other hand, the weft yarn 12 is wound around the outer peripheral surface of the stationary storage drum 14 by the rotation of the rotating yarn guide 13 and the locking action of the locking pin 15, where it is measured to a certain length and stored. After that, when the locking pin 15 is unwound, the main nozzle 6 blows the air into the path 11 along with the jet air 2a, and the sub-nozzle 10 sequentially energizes it during the flight process. Here, as the weft yarn 12 flies, the sub-nozzle 10 supplementally injects the blast air 2a in the weft insertion direction in a sequential relay manner.

The solenoid valve 9 is connected to the control device 1 of the present invention.
controlled by.

Next, FIG. 2 shows one solenoid valve 5 or one solenoid valve 9.
The configuration of the control device 1 is shown. This control device 1 includes an opening/closing control circuit 16, a comparator 17, and an AND gate 18 as a condition circuit. The opening/closing control circuit 16 includes an encoder 20 connected to the main shaft 19 of the loom. The encoder 20 is connected via two comparators 21 and 22 to the set and reset inputs of a flip-flop 23, respectively. The output terminal of the flip-flop 23 is connected to one input terminal of the AND gate 18.

Furthermore, a setter 24 for the open rotation angle θ1 and a setter 25 for the closed rotation angle θ2 are connected to the comparison circuits 21 and 22, respectively, and these are branched and connected to the comparator 17. . The output terminal of this comparator 17 is connected to one input terminal of the AND gate 18 via a NOT circuit 26. This AND gate 18 is connected to the solenoid valve 5 or each solenoid valve 9 via a drive amplifier 27.

action of invention Next, the operation of the control device 1 will be explained.

The weft insertion is the rotation angle of the loom, for example from 110 degrees to 260 degrees.
In the control device 1 corresponding to the solenoid valve 5 of the main nozzle 6, the setting device 24 sets the opening rotation angle θ1 to 110 degrees, and the setting device 25 sets the opening rotation angle θ1 to 110 degrees. Therefore, 260 degrees is set as the closing rotation angle θ2.

Since the encoder 20 detects the rotation angle θ while the loom is rotating, the comparator 21 outputs “H” when the rotation angle θ of the loom matches the open rotation angle θ1.
A level signal is generated, thereby setting the flip-flop 23 to the set state. Also, when the rotation angle θ of the loom reaches the closed rotation angle θ2, the comparator 22
generates an "H" level signal, thereby setting the flip-flop 23 in the reset state. As a result, an "H" level opening/closing control signal is generated at the output end of the flip-flop 23 from the open rotation angle .theta.1 to the close rotation angle .theta.2. On the other hand, the comparator 17 detects the open rotation angle θ1 and the closed rotation angle θ2.
Since it detects a mismatch between the two and generates an "L" level signal, an "H" level signal is input to the other input terminal of the AND gate 18. As a result, the AND gate 18 operates the drive amplifier 27 from the open rotation angle θ1 to the closed rotation angle θ2,
The solenoid valve 5 is opened and set to the on state. In this way, the electromagnetic valve 5 injects the jet air 2a over the set rotation angle range to insert the weft thread 12 into the channel 11, as shown in FIG. 3A.

On the other hand, as shown in FIG. 3B, the control of the electromagnetic valve 9 for the sub-nozzles 10 is divided into, for example, four parts for each group of sub-nozzles 10 from the open rotation angle θ1 to the closed rotation angle θ2, and is sequentially controlled by a relay system. Inject air 2a. Regarding the sub-nozzles 10 of each of these groups, the opening rotation angle θ1 is also set as described above.
and the closing rotation angle θ2 are set.

Here, regarding the solenoid valve 5, for example, the closing rotation angle θ2
Regarding this, if it is necessary to make changes to reduce the weaving width, the main nozzle 6 should be changed as shown in Figure 3 A'.
By adjusting the setting device 25 for the solenoid valve 5, a new closing rotation angle θ2 is set. Corresponding to this, the sub nozzle 10 of the fourth group
When the injection of the injection air 2a is no longer required for a group, the opening rotation angle θ1 and the closing rotation angle θ2 of the setters 24 and 25 of the control device 1 corresponding to the sub-nozzle 10 of that group are set to be equal. In this way, the comparator 17 detects a match between the two and generates an "H" level non-operating signal, which is converted into an "L" level signal by the NOT circuit 26, and the AND gate 18 It is fed into one input end. As a result, the AND gate 18 always does not energize the solenoid valve 9, regardless of the set and reset states of the flip-flop 23.
By setting the opening and closing rotation angles to be the same in this manner, the corresponding sub-nozzle 10 can be easily set to a non-operating state, that is, a non-operating state.

By the way, it is not possible to simply set the opening rotation angle θ1 and the closing rotation angle θ2 to be the same using the setters 24 and 25 of the opening/closing control circuit 16 without providing the comparator 17 or the AND gate 18 as a condition circuit. Due to the slow speed of signal transmission between the signal for starting injection and the signal for ending injection, a lag occurs on the time axis between the set input and reset input of the flip-flop 23, and the injection command is output instantaneously. Alternatively, the injection command may continue to be output. However, if the comparator 17 and the AND gate 18 as a conditional circuit are provided, the above-mentioned malfunction will not occur.

Other Embodiments of the Invention The above embodiments are examples of obtaining necessary functions using logic circuits, but such operations can also be realized in the field of programs using a CPU (central processing unit).

FIG. 4 shows an encoder 20 connected to the CPU 28 via a data bus 32, a ROM 29 for storing programs, a RAM 30, and an interface 31.
An example is shown in which the drive amplifiers 27 and the respective drive amplifiers 27 are connected. This CPU28 has ROM29 and
By reading the control program from the RAM 30 and performing the operations shown in FIG. 5, the same control functions as in the previous embodiment are realized.

This control operation will be explained based on the flowchart of FIG.

First, control of a certain solenoid valve 9 starts, and the rotation angle θ of the loom is first read by the encoder 20.
Then, it is determined that the open rotation angle θ1=the closed rotation angle θ2. When they match, the solenoid valve 9 is set to a non-operating state, thereby ending the control.

On the other hand, if the open rotation angle θ1≠close rotation angle θ2, it is first determined that the open rotation angle θ1<close rotation angle θ2, and the open rotation angle θ1<close rotation angle θ2, and the rotation angle θ<open rotation angle θ2. When the rotation angle θ1, the solenoid valve 9 is turned off (closed), and when the rotation angle θ<open rotation angle θ1, the solenoid valve 9 is turned off based on the determination that the rotation angle θ≧θ2. Or an on operation is performed. Also, when the open rotation angle θ1>the closed rotation angle θ2, the solenoid valve 9
on or off is controlled.

Since the control program for the solenoid valve 9 includes the process of determining the opening rotation angle θ1 = the closing rotation angle θ2, the non-operating state of the solenoid valve 9 can be easily set without changing the program itself. can. In such an embodiment, the functional elements of the CPU 28, that is, storage, calculation, and control functions, as well as the program, are equivalent to each element of the logic circuit described above.

Effects of the invention In the present invention, since the control circuit of the solenoid valve includes a process for determining whether the opening rotation angle and the closing rotation angle of the solenoid valve match, the corresponding solenoid Since the valve can be set to a non-operating state, there is no need to perform operations such as blocking the piping or removing the solenoid valve circuit as in conventional methods, and the non-operating state of the solenoid valve can be easily changed by setting the rotation angle. .

[Brief explanation of drawings]

Figure 1 is a piping route diagram of the horizontal loading solenoid valve, Figure 2
The figure is a block diagram of the control device of the present invention, FIG. 3 is a time chart during operation, FIG. 4 is a block diagram of a control device in another embodiment, and FIG. 5 is a flow chart of the operation. be. 1... Control device, 2... Pressure air source, 5, 9...
... Solenoid valve, 6 ... Main nozzle, 10 ... Sub nozzle, 16 ... Opening/closing control circuit, 17, 21, 22
... Comparator, 18 ... AND gate as condition circuit, 20 ... Encoder, 23 ... Flip-flop, 24, 25 ... Setting device, 26 ... Note circuit, 27 ... Drive amplifier, 28 ... CPU, 2
9...ROM, 30...RAM.

Claims (1)

[Scope of utility model registration request] multiple solenoid valves that control horizontal loading fluid;
The rotation angle of the loom is detected, and the rotation angle is compared with the preset opening and closing rotation angles of each of the solenoid valves, and the opening/closing control is performed from the time when the former matches until the time when the latter matches. An opening/closing control circuit that generates a signal, a comparator that compares the opening rotation angle and the closing rotation angle and generates a non-operation signal when the two match, and the opening/closing control signal and the non-operation signal. A control device for a horizontal insertion solenoid valve, characterized in that it is provided with a conditional circuit that prohibits the output of an opening/closing control signal when a non-operating signal is present as an input.