JP2673453B2 - Loom weaving weft insertion command method and device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for instructing an inching and weft insertion of a loom, and more particularly to an improvement in an inching and weft insertion technique in a loom.

(Prior Art) Inching weft insertion, that is, weft inserting operation during inching operation is an indispensable operation for machine adjustment such as weaving and tacker at the time of running.

For this inching and weft insertion, conventionally, the inching and weft insertion is started using a single timing signal generated in relation to the rotation angle of the loom main shaft. For this reason, if the weaving machine is rotated back and forth (forward / reverse rotation) near the weft insertion start timing, weft insertion is unintentionally performed, which is very inconvenient in operation.

That is, when the worker operates the inching button to repeat the forward and reverse rotations of the loom, if the forward and reverse rotations occur before and after the weft insertion start timing, multiple wefts are inserted into the same mouth. become. Further, it is assumed that the worker pushes the button in order to rotate the loom in the forward direction while the loom is present immediately after the weft insertion start timing. Then, as the brake of the loom is released, the load of the loom causes the motor to make a slight reverse rotation, and the above weft insertion start timing is exceeded. Therefore, the extra weft insertion is carried out when the normal rotation is made by the command thereafter.

(Summary of the Invention) An object of the present invention is to prevent unintentional multi-weft insertion from being performed at the time of inching weft insertion, especially when the forward and reverse rotations of the loom cross before and after the weft insertion start timing. It is in.

Therefore, according to the invention of this application, by using a signal indicating the rotation state of the loom, when the loom once passes a predetermined rotation angle, for example, 0 ° in the normal rotation state, and then further passes the first weft insertion start timing. The gist is that only the inching and weft insertion start signal is output.

(Embodiment) First, referring to FIG. 8, the relationship between the inching weft insertion command device of the present invention and the weft insertion system of a loom will be briefly described. The weft inserting operation of each part of the loom, that is, the main nozzle, the sub nozzle, the weft control pin, and the like during the inching operation is controlled by the inching weft inserting controller 20, and the inching weft inserting command device 10 of the present invention is the controller 20. And the inching and weft inserting start signal is output to it by the steps described below.

FIG. 1 shows a first embodiment of the present invention, in which a detection means 10 is provided by a logic circuit using two timing signals having different phases which change according to the rotation angle of the loom.
1, the holding means 102 and the command output means 103 are respectively configured to achieve the above object.

The present embodiment shows a case where the present invention is applied to a multi-color weft insertion loom, and a plurality of logic circuits are provided in parallel corresponding to the types of weft yarns. For the sake of simplicity, one of the logic circuits will be described below. In the following description, H and L indicate high and low levels of signal, respectively.

And element 1 has non-operation signal SD and weft selection signal SS
Is input, and its output side is connected to the AND element 16.

The output side of the sensor 2 such as a proximity switch opposite to the main shaft MS of the loom is connected to the AND element 4 via the one-shot multivibrator 3, to the AND element 14 via the one-shot multivibrator 13, and then to the reversing device 7. Are connected to the AND element 8 via. The output side of the AND element 4 is connected to the set terminal S of the flip-flop 6. Output terminal Q of this flip-flop 6
Is connected to the AND element 16. In this example, the sensor 2 is H at the loom rotation angle 0 to 10 ° as shown in FIG.
And outputs a switching timing signal SA.

Proximity switch and other sensors opposite the main shaft MS of the loom
The output side of 11 is directly connected to the AND element 4, connected to the AND element 8 via the multivibrator 12, and further directly connected to the AND element 14. The output side of the AND element 8 is connected to the reset terminal R of the flip-flop 6 via the OR element 9 and directly to the AND element 16. The output side of the AND element 14 is also connected to the reset terminal R of the flip-flop 6 via the OR element 9.
In this example, the sensor 11 is a loom rotation angle as shown in FIG.
The switching timing signal SB which becomes H at 110 to 4 ° is output.

A power source + V is further connected to the AND element 16 via a selection switch 17.

Therefore, the signal from AND element 1 is applied to AND element 16.
S0, the signal S2 from the flip-flop 6, the signal S3 from the AND element 8 and the signal ST from the switch 17 are input, and when these signals are all H, the AND condition is satisfied and the inching and weft insertion is performed. The start signal SI is output from this AND element 16, i.e. from the device according to the invention.

In this example, the weaving machine rotation angle of 110 ° is used as the inching start timing.

The inching motion is performed by an operator operating a forward rotation or reverse rotation button (not shown) for inching operation when the loom is stopped. Then, in that state, SD = H because it is not in operation, and if the weft of the corresponding weft inserting member of the logic circuit is selected, the weft selection signal to the AND element 1 of the logic circuit is selected. SO = because SS is H
H is input to the AND element 16.

For example, in the case shown in FIG. 2A (as an example, but not limited to this), when the loom rotates forward and the rotation angle becomes 0 °, the switching timing signal SA = H. In response to this rise, the one-shot signal = H is input to the AND element 4 from the multivibrator 3. As is apparent from FIG. 2, since the switching timing signal SB = H at this point, the AND element 4 outputs the signal S1 = H, and the flip-flop 6 is set in response to this. Therefore, the signal S2 = H is input from the flip-flop 6 to the AND element 16.

When the loom further rotates forward and the rotation angle reaches 110 °, the switching timing signal SB = H. In response to this rise, the one-shot signal = H is input to the AND element 8 from the multivibrator 12. Switching timing signal at this point
Since SA = L, the signal = H goes through the inverter 7 and the AND element 8
Is input to Therefore, the signal S3 = H from the AND element 8
Is input to the AND element 16.

Since the switch 17 is turned on by the operator for the inching weft insertion, the signal ST = H is input to the AND element 16, and the AND condition is satisfied by this, and the inching weft insertion starts from the AND element 16. The signal SI is output and input to the inching / weft insertion control unit (not shown). In response to this, the control unit ejects the weft insertion nozzle corresponding to the weft selection signal at that timing, unwinds one pick of weft from the length measurement storage device, and performs one weft insertion.

The signal S3 = H from the AND element 8 is also input to the flip-flop 6 via the OR element 9 and resets immediately after the inching and weft insertion start signal S1 is output. Then, since the signal S2 = L, the AND condition in the AND element 16 is not satisfied, and the inching / weft insertion start signal SI disappears.

When the weft-insertion start timing (that is, 110 ° in this example) is not reached during the forward rotation of the loom and the rotation is reversed to 0 °, the switching timing signal SA = L. In response to this fall, one shot = H is input to the AND element 14 from the multivibrator 3. Switching timing signal at this point
Since SB = H, the signal S4 = H from the AND element 14 is input to the flip-flop 6 via the OR element 9 to reset it.

Therefore, the inching start weft-insertion start signal SI is output only when the normal rotation direction once passes 0 ° and then the forward rotation further passes the weft-insertion start timing (110 °). The flip-flop is reset immediately after this signal is output, so weft insertion within the same cycle
Not performed unless the loom is reversed up to 0 °.

The above operation will be described with reference to the examples shown in FIG. In addition, the ▲ mark in the figure indicates the inching.

In the case of (A), after passing 0 ° once, the forward rotation is continued to pass the weft insertion start timing, so that the inching weft insertion is performed at this time.

In the case of (B), the weaving loom reverses at the weft insertion start timing, but the weaving machine reverses to 0 °, so it moves to the normal rotation. Is not done.

In the case of (C), since it does not return to 0 ° in the first reverse rotation, even if it passes the weft insertion start timing due to the forward rotation, inching weft insertion is not performed, and it will return to 0 ° in the next reverse rotation, so it continues. When the weft insertion start timing is passed by the forward rotation, inching weft insertion is performed. Further, the next cycle 0 ° is passed in the normal rotation, and the flip-flop 6 is set,
In the present embodiment, it is reset again when 0 ° of this cycle is passed in the reverse rotation, and moreover, 0 of the first cycle is reset.
Since it does not return to ゜, the inching weft insertion is not performed even if the weft insertion start timing is passed in the forward rotation.

In the case of (D), it reverses and once returns to 0 °, then moves to normal. Therefore, when the weft insertion start timing is reached, inching weft insertion is performed.

In the case of (E), since it has returned to 0 degrees in the second reverse rotation, the inching weft insertion is performed when the weft insertion start timing is reached during the forward rotation. However, in this case, after the inching weft insertion, it reverses again, and after returning to 0 °, it turns to the forward rotation and reaches the weft insertion start timing again, so that the inching weft insertion is performed again. In other words, two weft insertions are performed. However, this is a case in which the defective weft is removed and the weft insertion is intentionally performed again when the previous inching weft insertion fails, and therefore the loom is once reversed to 0 °. . Therefore, the predetermined rotation angle (0 ° in the present embodiment) must be appropriately set at a position where two weft insertions can not be performed unintentionally and intentionally. It will be.

FIGS. 3 (A) and 3 (B) show a second embodiment of the present invention in which the above-mentioned object is realized by software by using two timing signals having different phases which change with the rotation angle of the loom. Is to achieve. Signals such as the switching timing signal are the same as those described above.

In this embodiment, the determination is made by detecting the high level (H, L) and the rising (L → H) and the falling (H → L) of the switching timing signals SA and SB.

By the way, the following table shows the relationship between both signals SA, SB and the inching weft insertion flab (FG).

SA SB FG Inching weft insertion (1) L → H H → 1 − (2) H H → LX − (3) H → L L X − (4) L L → H 0 Weft insertion when FG = 1 (5) L H → L X − (6) L → H L X − (7) H L → H X − (8) H → L H → 0 − The process for detection is shown in FIG. 3 (A), It shows in (B). Here, the inching weft insertion flag = 1 indicates that the temperature has passed 0 ° C. during the forward rotation, and the inching movement weft insertion flag = 0 indicates the weft insertion start timing during the forward rotation (110 in the above example). After passing 0), the inching weft insertion flag → 1 indicates that 0 ° was passed during forward rotation, and the inching weft insertion flag → 0 indicates weft insertion start during forward rotation. It indicates that the timing has been passed or that 0 ° has been passed in reverse.

The numbers in parentheses in the figure are from (1) to
Corresponding to (8), a is attached to the path after passing the weft insertion start timing in the forward rotation (after the inching weft insertion flag is reset), and b is attached to the weft insertion start timing. This is a route that runs in the reverse direction before passing through in the forward direction (while the inching weft insertion flag is still set).

As is clear from this, the intended purpose can be achieved only by detecting and determining three states, that is, the states (1), (4) and (8) in the above table. In addition, the inching weft insertion flag is always reset after the inching weft insertion is performed. This is because the flip-flop is always reset immediately after the weft insertion start signal is output in the previous embodiment. Correspondingly, also in this embodiment, weft insertion in the same cycle is not performed unless it is reversed again to 0 °.

FIGS. 4 and 5 show a third embodiment of the present invention, which uses a signal indicating the rotation direction of the machine and a signal for maintaining a constant output level between a predetermined rotation angle and the first embodiment. Similar to the embodiment, the detection means 301, the holding means 302, and the command output means 303 are each configured by a logic circuit to achieve the above-mentioned object.

In FIG. 4, the timing signal S10 is input to the one-shot multivibrators 21 and 23. As shown in FIG. 5, the timing signal S10 is a signal which becomes H from 0 ° to the weft insertion start timing (110 ° in this example). Multivibrator 21 is this timing signal
One-shot signal S12 is ANDed according to the falling edge of S10
Output to 22. The output signal of the AND element 22 is input to the AND element 27.

Further, the multivibrator 23 outputs the one-shot signal S13 to the AND element 24 in response to the rising of the timing signal S10. Further, the AND elements 22 and 24 have a forward rotation signal of the loom.
S11 is entered. The normal rotation signal S11 is a signal which becomes H when the loom is rotated in the normal direction. The output signal of the AND element 24 is input to the set terminal S of the flip-flop 26, and when it is H, it is set. The output signal S14 from the terminal Q of the flip-flop 26 is input to the AND element 27. The AND element 27 is the inching and weft insertion start signal when the AND condition is satisfied.
SI is output, and inching and weft insertion is performed based on this command. Further, this jogging and weft insertion start signal SI is input to the multivibrator 28. The multivibrator 28 outputs the signal S15 to the reset terminal R of the flip-flop 26 in response to the fall of the inching / weft insertion start signal SI, and resets it.

Next, the operation will be described with reference to FIG. Signal during forward rotation
S11 = H, and the signal S13 → H is obtained when passing through 0 °. Therefore, the AND condition is set in the AND element 24, and the flip-flop 26 is set to output the output signal S14 → H.
However, at this time, since the signal S12 = L, the AND elements 22 and 27 do not satisfy the AND condition.

When it further rotates forward to 110 °, the signal S12 → H.
Therefore, the AND elements 22 and 27 satisfy the AND condition and the inching and weft insertion start signal SI is output. That is, the inching weft insertion control unit 20 performs inching weft insertion. In response to the fall of the inching / wetting insertion start signal SI, the signal S15 → H is input to the flip-flop 26, so that the flip-flop 26 is reset immediately after the output of the inching / wetting insertion start signal SI.

By the way, it is assumed that the loom has passed the weft insertion start timing in the reverse direction. At this time, the normal 4 signals S11 = L.
Even if the weft insertion start timing is passed again after turning to normal rotation, the AND condition is not satisfied in the AND element 27 because the flip-flop 26 has already been reset, and therefore the inching weft insertion start signal SI is not output.

That is, as in the previous case, once the loom is reversely rotated to a position where it exceeds 0 °, and then after passing 0 ° in the forward direction, it further rotates in the forward direction and starts inching only when the weft insertion start timing is passed. The signal SI is output. Also, the point that the flip-flop is reset immediately after the inching / weft insertion start signal SI is output is the same as the embodiment shown in FIGS.

FIG. 6 shows a fourth embodiment of the present invention, which achieves the above-mentioned object by software using a rotation angle signal of a loom.

In this embodiment, the angle signal S16 indicating the rotation angle of the loom is used, but the rotation direction is determined by software without using the forward rotation signal. Other displays and the like are the same as in the case of the previous embodiment.

In this embodiment, the program is executed each time the rotation angle signal S16 of the loom changes due to the inching operation. First, the value of the input angle signal is stored as M (M = S1
6) At the end of the series of flows, the stored value of M is stored as M '(M' = M), and the process ends. Here, M'indicates the previous value of M (that is, the value of M immediately before step M = S16).

When the rotation angle of the loom becomes 0 ° during inching operation (M
= 0), it is judged in the next step whether the value of M'is larger or smaller than 180 (M '> 180). The insertion flag is set (FG1 → 1). After that, when the rotation angle reaches 110 °, which is the start timing of inching, (M = 110 °), it is determined in the next step whether or not the flag is set (FG = 1?), And it is set. If so, a signal for start of inching insertion is output, and immediately after that, the weft insertion flag is reset (FG1 → 0).

When the rotation angle becomes 0 °, if the value of M ′ is smaller than 180 in the next judgment process, the inching weft insertion flag that was set previously was reset as 0 ° was entered by reverse rotation. It is done (FG → 0).

FIG. 7 shows a fifth embodiment of the present invention, which is intended to achieve the above object by a combination of a timing signal and a push button operation for inching and weft insertion.

The timing signal used here is a pulse signal which becomes H when it passes 0 ° in the normal rotation, and for example, the output signal S1 of the AND element 4 shown in FIG. 1 may be used. Seventh
In the figure, a push button 33 for inching and weft insertion is provided between an appropriate power source and the set terminal S of the flip-flop 31. The timing signal S20 is input to the reset terminal of the flip-flop 33, and the output terminal Q
Is connected to the one-shot multivibrator 32. This multi-vibrator 32 outputs an inching and weft insertion start signal SI when the rising edge of the signal is input.

When it becomes 0 ° in the normal rotation state, one shot is output from the timing signal S20 and the flip-flop 31 is reset. Further, when the forward rotation is performed and the opening becomes large enough to reach the proper timing for starting the weft insertion (110 ° in this example), the operator selects the button 33 for starting the weft insertion, the flip-flop 31 is set, and the multivibrator is set. 32 outputs the inching and weft insertion start signal SI. Then, once the flip-flop is set and inching operation weft insertion is performed,
Unless it passes 0 ° again, it will not be reset, so two weft insertions will not be made in the same mouth.

In the first and second embodiments, the switching timing signal SA which becomes H at the rotation angle of the loom of 0 to 10 ° and the switching timing signal SB which becomes H at the rotation angle of 110 to 4 ° are used to relate to the rotation direction of the loom. Although the detection of the predetermined rotation angle (0 °) and the weft insertion start timing are detected, the present invention is not limited to this, for example, the switching timing signal SA is left as it is and the switching timing signal SB becomes H at 300 to 4 °. Alternatively, one shot may be output at the weft insertion timing independently of the rotation direction, and the above detection may be performed using these signals.

(Effect) As described above, in the present invention, when it is detected that the loom has rotated forward and a predetermined rotation angle has passed and then the first weft insertion timing has passed, and this detection is performed. Since the weft insertion start signal is output only to the weaving machine, even when the loom is rotated forward and backward around the weft insertion start timing during inching operation, weft insertion is performed unintentionally multiple times in the same mouth. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of the first embodiment of the apparatus of the present invention, FIG. 2 is a timing chart showing the relationship between the change with time of the signal and the inching and weft insertion, FIG. 3 (A), (B) is a flow chart showing the second embodiment of the present invention, FIG. 4 is a block diagram showing the third embodiment of the present invention, FIG. 5 is a flow chart showing the change with time of the signal, FIG. Is a flow chart showing the fourth embodiment of the present invention, FIG. 7 is a block diagram showing the fifth embodiment of the present invention, and FIG. 8 is an explanatory view showing the relationship between the apparatus of the present invention and the weft insertion system. Is. 10 …… Inching weft insertion command device 20 …… Inching weft insertion control unit SI …… Inching weft insertion start signal SA, SB …… Switching timing signal S10 …… Timing signal S20 …… Normal rotation signal

Claims (4)

(57) [Claims] 1. When a signal indicating the rotation state of the loom is used during inching operation, the loom once passes a predetermined rotation angle in the forward rotation state and then further passes the first weft insertion start timing. A loom weft insertion command method for a loom, which is characterized in that the detection is made and only when this detection is made, the jogging weft insertion start signal is output. 2. The method according to claim 1, wherein the signals are two signals having different phases with respect to the predetermined loom rotation angle. 3. The method according to claim 1, wherein the signals are a first signal that changes with the rotation angle of the loom and a second signal that changes with the rotation direction of the loom. 4. A detecting means for detecting a predetermined rotation angle in relation to the rotation direction by inputting a signal indicating the rotation state of the loom during the inching operation, and when the predetermined rotation angle is detected in the forward rotation. It comprises a holding means for holding a state corresponding to the detection, and a command output means for outputting an inching weft insertion start signal and then releasing the holding if the above state is held at the weft insertion start timing. An inching and weft inserting command device for a loom.