JPH0491257A - Shutdown of loom and operation of loom utilizing the same - Google Patents

Abstract

PURPOSE:To prevent weaving bars development by inhibiting delivery operation at least during reversion of the opening cycle with normal picking made. CONSTITUTION:When the opening pattern of a warp-stopped loom is changed to 'plain weaving' and to be waited in the closed state of the plain weaving after reversion, delivery operation is inhibited at least during reversion of the opening cycle with normal picking made, thus preventing reversion of weaving front WF toward warp Wa side off the normal weaving front position and also preventing unnecessarily forcing the weaving front WF toward a woven fabric W side through a check R.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for stopping a loom to effectively prevent the occurrence of weaving steps when restarting a loom that has stalled, and a method for operating a loom using the method. Regarding the method.

When a conventional loom stalls at warp, the warp repair work can be carried out extremely efficiently by placing it in a closed state of plain weaving and standing by with all heddle frames aligned at the same level. This is because all the warp yarns are aligned in the same plane, making it easier to detect defective yarns and perform operations such as drawing out and splicing yarns. Also,
Since the tension is low and the same for all warp threads, even if the stop time is long, the amount of elongation of the warp threads will not be large, and the elongation may be uneven (thereby, the quality of the woven fabric may deteriorate). few.

The conventional procedure for performing such a leveling operation is as follows. That is, when a warp stop is detected, a loom stop signal is output at a subsequent specific loom machine angle, and the loom then returns to the specific loom machine angle after a braking period corresponding to about one open cycle due to inertia. to stop at the fixed position. Next, the instruction of the shedding pattern during weaving is changed to plain weave, and a reverse operation is instructed. At this time, generally, even if the shedding device is instructed to perform a specific aperture pattern,
Since the heddle frame responds to the opening cycle with a delay of one opening cycle, a reverse operation of two opening cycles is required to obtain the closed state of the plain weave. Therefore,
The loom only needs to rotate in reverse two revolutions from the point of stop and stand by at a loom mechanical angle where the warp threads are in a closed state.

On the other hand, when the loom comes to rest in this manner, the weft insertion operation is generally prohibited for one rotation during the braking period. This is because the weft insertion at that time is performed when the loom rotational speed is low, so the beating force is insufficient and looms are likely to occur. In addition, regarding the warp delivery operation, generally no measures are taken during the braking period and during the subsequent reversal operation, so the delivery operation is as follows:
It will continue as it is during normal operation. Note that the "feeding operation" herein refers to an operation that includes not only the operation of feeding the warp from the warp beam but also the operation of winding up the woven fabric.

Therefore, at the time when the loom stop signal is output, the Orimae WF
is at the normal loom position P (Fig. 8 (1)), but during the braking period, one pick is fed in the forward direction, and no weft insertion is performed during the braking period, so the loom stops. The position of the cloth front WF at the time is 1 with respect to the regular cloth front position P.
It will move to the woven fabric W side by the pick amount (see figure (2)
)).

However, in the same figure, the left side of the fabric WF is the warp Wa
, and the right side represents the woven fabric W, into which the weft yarn FSF... is inserted for each pick. After that, when the shedding pattern is changed to plain weave and the loom is reversed twice, the loom WF moves one pick toward the warp Wa side for each reverse rotation.
(4)), finally, the warp W
The position is one pick away from the a side.

Problems to be Solved by the Invention This conventional technique has the disadvantage that fatal weaving steps occur in the woven fabric. In other words, when the loom is reversed to stop the loom at the loom machine angle where the warp is in a closed state, the reed beating operation occurs just before the end of the reversal, but at this time, the warp Wa The woven fabric WF that has moved backward is pushed further toward the woven fabric W side by the reed than necessary, resulting in a so-called thick film.

Incidentally, even if the reverse rotation stop position is slightly shifted from the most advanced position of the reed, the woven cloth WF will come into contact with the reed, and the same problem cannot be avoided. In this way, once a thick film has formed on the woven fabric, it is difficult to restore it to a normal woven fabric in subsequent operations, and the woven fabric remains as a fatal weaving layer.

Therefore, in view of the actual state of the prior art, an object of the present invention is to prohibit the unfeeding operation at least during the reversal of the shedding cycle after regular weft insertion, thereby restarting the loom after waiting in the closed state of plain weaving. It is an object of the present invention to provide a method for stopping a loom that can effectively prevent the occurrence of loom steps even when the loom is restarted, and a method for operating the loom that utilizes the method.

Means for Solving the Problems The first aspect of the present invention to achieve the object is to change the shedding pattern of the warp-stopped loom to plain weave,
The gist of this is to prohibit the feeding operation at least during the reversal of the shedding cycle in which normal weft insertion has been performed, when the cloth is reversed and the plain weave is put on standby in the closed state.

The configuration of the second invention is that following the stopping method according to the first invention, the warp is repaired and an instruction is given to return to the regular shedding pattern, and after one rotation of inching, the loom is started by allowing the unwinding operation. With this in mind, the configuration of the third invention includes, following the stopping method according to the first invention, repairing the warp and instructing the return to the regular shedding pattern, starting the loom, and starting the sending operation after one revolution. Its gist is to permit.

Effect When according to the configuration of the first invention, the predetermined closed state of the plain weave is realized by two rotations of reverse operation after warping, but at this time, the shedding cycle of the first rotation is the same as the shedding cycle during the braking operation. Correspondingly, regular weft insertion is not performed, and regular weft insertion is performed in the second shedding cycle. Therefore, if the feeding operation is prohibited at the time when the first rotation of the reverse rotation is completed, the woven fabric will be at the normal position due to the first rotation of the fabric, and then the second rotation will occur. Therefore, the position of the cloth front at the time of completion of the second rotation of the reverse rotation can maintain the normal position of the cloth front. Therefore, after that, the warp is repaired and an instruction is given to return to the regular shedding pattern, and the feed-out operation is inhibited and moved one full rotation in the forward direction to change the actual warp shedding pattern to the regular shedding pattern. By allowing the operation and starting the loom, the loom can be restarted according to the second invention.

At this time, the restart according to the third aspect of the invention may be performed by starting the loom immediately after the warp repair and returning to the regular shedding pattern, and allowing the sending operation after one revolution. However, in this case, in order to return the actual shedding pattern to the regular shedding pattern, both the weft insertion and unwinding operations shall be prohibited for one rotation immediately after the loom starts.
From the second rotation onwards, weft insertion and unwinding operations are allowed,
It shall return to normal operating condition.

It is also possible to prohibit the delivery operation during the first rotation of the reverse rotation. At this time, the loom does not move during the reversing operation, so after the two rotations of the reversing operation are completed, the loom moves one pick away from the normal loom position, just like when the loom stops. It's deviated. Therefore, at this time, the warp is repaired and an instruction is given to return to the regular shedding pattern. After that, the feeding direction is switched to the opposite direction, and the actual shedding pattern is changed by performing one forward rotation. What is necessary is to set the regular shedding pattern, return the cloth cloth to the regular cloth cloth cloth position, and then allow the unwinding operation and start the loom. That is, according to the second invention, the loom can be restarted.

The delivery operation can also be prohibited during the braking period at the end of the run. Orimae at this time, during the braking period,
Even during the subsequent two-rotation reversal operation, there is no movement and the normal position of the cloth can be maintained as it is.

Therefore, the loom can be restarted thereafter according to either the second invention or the third invention.

The operating method of the example loom starts with the procedure of changing the shedding pattern to plain weave after the warp ends, reversing the pattern twice, waiting, and then instructing the loom to return to the regular shedding pattern, making one full rotation and starting the loom. (Figure 1).

The loom is of any type (Fig. 2), and the warp Wa from the warp beam B1 passes through the tension roller B2) dropper DP, heddle frame SD, and SD, and reaches the loom WF.
The weft F inserted into the opening Wal is woven by the reed R.
Enter F to weave woven fabric W. The woven fabric W is wound onto a fabric beam B4 via a winding roller B3.

The main shaft MS of the loom is connected to the main motor M via a bell MSI. Further, the warp beam B1 and the take-up roller B3 are each driven by a feed-out motor Ml.

It is driven by a winding motor M2.

In addition to the main controller C that inputs a manual repair completion signal si, the loom is equipped with a feed-out controller M1a, a shedding controller SDa, a winding controller M2as, and a weft insertion controller WCa. . Further, an encoder EN is provided near the main shaft MS, and the loom mechanical angle θ from the encoder EN is branched into the main controller C1, the shedding controller SDa, the winding controller M2a, and the weft insertion controller WCa. .

When there is a weft insertion permission signal Sf from the main controller C, the weft insertion control device WCa controls a weft insertion member (not shown) at a predetermined loom mechanical angle θ, and inserts the weaving yarn F.

The shedding control device SDa is, for example, a shedding device such as a dobby device or a jacquard device, and when a shedding pattern signal Sp from the main control device C is inputted, the shedding control device SDa controls a predetermined loom mechanical angle θ.
In this step, the heald frame 5DSSD is opened according to a specified opening pattern. However, the drive source for the heald frames SD and SD is generally mechanically derived from the main shaft MS. Therefore, the heald frames SD%SD follows the shedding pattern instructed by the shedding pattern signal Sp only when a new shedding pattern is established. The opening cycle is limited to the opening cycle after the main shaft MS has made approximately one rotation after the signal Sp is output.

The winding control device M2a and the feed-out control device Mla follow the feed-out permission signal S+ from the main control device C.

That is, when there is a sending-off permission signal 5I11, the winding control device M2a inputs the loom mechanical angle θ, rotates the winding beam B3 by a predetermined amount for each bit via the winding motor M2, and finishes the weaving. The cloth W can be wound up, and at this time, the feed-out control device Mla controls the feed-out motor Ml to follow the wind-up control device M2a so that the tension T of the warp yarns Wa becomes constant. However, the tension roller B2 is equipped with a load cell B2 that detects the tension T of the warp yarns Wa.
g is attached, and the feed-out control device Mla forms a tension control system in which the tension T is input and the feed-out motor M1 is controlled.

The dropper DP is activated due to a cutting accident of the warp thread Wa,
The output is inputted to the main controller C as a warp breakage signal S2 via the warp breakage detector DPa.

Currently, when the loom is operating normally, the heald frame SD
, SD are the regular shedding patterns instructed by the shedding pattern signal Sp from the main controller C, that is, the predetermined shedding patterns required for the woven fabric W being woven (see FIG. 1). top). However, the numbers 1, 2, 3, etc. in the figure indicate specific aperture patterns for each pick when the regular aperture pattern is a repeating unit of three or more picks. In addition, the aperture pattern signal S
p simply specifies the type of opening pattern,
It is assumed that the specific aperture pattern command for each pick is created inside the aperture control device SDa. moreover,
Since the heald frame 5DSSD receives its drive source from the main shaft MS, the content of the shedding pattern command for each pick is realized as an actual shedding pattern after one opening cycle.

When a warp break occurs in the warp thread Wa at any time, the dropper DP is activated and a warp break signal S2 is sent to the main controller C from the warp break detector DPa.

In response, the main controller C sets a specific loom mechanical angle θ.
After that, the main motor M enters a braking operation and the loom stops at a predetermined loom machine angle after a braking period corresponding to about one open cycle. Note that at this time, the main controller C controls the weaving control device WCa.
The weft insertion permission signal Sf is reset to prohibit the weft insertion operation during the braking period. In addition, the main controller C continues to send the feed-out permission signal 5I11 to the winding control device M2a and the feed-out control device Mla, so that the feed-out operation of the woven fabric W and the warp yarn Wa is not performed during the braking period. Therefore, the position of the loom WF when the loom is stopped is shifted by 1 bit from the normal loom position P toward the woven fabric W (Fig. 3 (1), (2). )).

When the loom stops, the main controller C changes the content of the shedding pattern signal Sp and changes the shedding pattern to plain weave (middle row in FIG. 1). As a result, the shedding control device SDa sends the shedding pattern command "
For example, the second plain weave
The bit shedding pattern is commanded, but at this time, the actual shedding pattern does not change at all because the loom is stopped.

Next, the main controller C performs one rotation of the reverse rotation via the main motor M. As a result, the heald frame SD.

The actual aperture pattern of SD is the aperture pattern during the braking period.
5" is reproduced, and Orimae WF is at the regular Orimae position P.
(Fig. 3 (3)).

The main control device C then resets the feed permission signal Sm for the winding control device M2a and the feed-out control device Mla, prohibits the feed-out operation, and performs the second rotation in reverse. Note that the shedding cycle of the second rotation of the reverse rotation corresponds to the final shedding cycle in which regular weft insertion was performed during normal operation before the loom was stopped. As a result, the heald frames SD, SD pass through the opening pattern of the second pick of the plain weave, and by stopping the reversal operation at the loom machine angle where the opening pattern becomes the closed state, the heald frames SD, SD are aligned at the same level. On the other hand, the weave WF maintains the normal weave position P as it is (FIG. 3 (4)), since the feeding operation is prohibited.

The loom stands by in this state, waiting for craftsmen to repair the warp threads. When the weaver completes the warp repair, he inputs a repair completion signal S1 to the main controller C.

When the repair completion signal S1 is input, the main control device C changes the content of the shedding pattern signal Sp, and the shedding control device SD
A is instructed to return the shedding pattern from plain weave to the regular shedding pattern (lower row of Fig. 1). Next, the main controller C returns the shedding pattern to the shedding pattern "5" during the braking period by moving the main motor M one rotation in the forward direction, and also controls both the weft-feeding operation and the weft-insertion operation. It is possible to restart the loom and return to normal operation. In this way, when the loom is stopped, the woven fabric WF does not move backward from the normal woven fabric position P to the warp Wa side (Fig. 3), so the woven fabric WF is moved by the reed R to the woven fabric W.
It will not be pushed further to the side than necessary. Therefore, there is no possibility that a thick film will form on the woven fabric W.

The above control operations by the main controller C can be expressed by the program flowchart shown in FIG. That is, when the stop signal S2 occurs, the program:
First, wait until the loom mechanical angle θ reaches a predetermined value (program step (1) in Fig. 4, hereinafter simply referred to as (1)), and then generate a loom stop signal (2). Motor M enters braking operation. The program also prohibits the weft insertion control device WCa from performing the weft insertion operation (3).

When the loom stops (4), the shedding pattern is changed to plain weave (5), and the loom is reversed twice (6).

However, upon completion of the first rotation (7), the feeding operation is prohibited (8), and by reversing the second rotation, the plain weave is kept in a closed state (9), waiting for the weaver to complete the warp repair (8).
lO).

When the warp repair is completed (10), an instruction is given to restore the shedding pattern to the regular shedding pattern (11), and one rotation is performed ((12), (13)). As a result, the actual shedding pattern returns to the regular shedding pattern, and henceforth, it is only necessary to allow both the unwinding operation and the weft insertion operation (14) and restart the loom (15).

In the above description, the movable operation immediately before restarting the loom can be omitted (FIG. 5).

That is, after the warp repair is completed (program step (10) in the figure, hereinafter simply referred to as (10)), when the shedding pattern is instructed to return to the regular shedding pattern (11)
, immediately start the loom (15), and when the main shaft MS rotates one rotation in the forward direction (16), allow the unwinding operation and the weft insertion operation (17), and shift to normal operation. At this time, the first rotation after starting the loom is a blank beating state without moving the loom WF.

Note that when commanding movement or starting the loom, the shedding pattern is instructed to return to the regular shedding pattern, but this operation will change the actual shedding pattern to the regular shedding pattern by the subsequent movement or the first revolution after startup. It is sufficient if the warp can be returned to normal, so it does not matter whether it is done before or after the warp repair is completed.

In the above explanation, when the feed-out control device Mla receives the feed-out permission signal Sm, it follows the winding control device M2a by tension control, but instead of this,
Similarly to the winding control device M2a, the warp beam B1 may be rotated by a predetermined amount for each pick via the sending motor M1.

Another Embodiment The main controller C can prohibit the feeding operation after the loom has stopped due to the warp stop and before the reversing operation of the first rotation (FIG. 6).

At this time, the Orimae WF maintains its stopped position even after two rotations ((3) and (4) in the same figure).
), the main control device C continues to move in the forward direction by controlling the take-up control device M 2 as the feed-out control device Ml.
command a to send out in the opposite direction. Therefore,
The winding control device M2a and the feeding control device M1a move the fabric front WF not to the fabric W side but to the warp Wa side by movable operation.
By moving the cloth by one pick, the cloth front WF can be returned to the regular cloth front position P ((5) in the figure).

The main controller C then starts the loom by allowing both the normal weft-feeding operation and the weft-inserting operation. In this case, since it is necessary to set the unwinding operation when moving in the opposite direction, the moving operation before starting the loom is omitted, and instead, one revolution after starting the loom, that is, the weft insertion operation. It is generally difficult to perform one rotation operation in a state where blank firing is prohibited. However, it goes without saying that if the direction change of this delivery operation can be performed smoothly, the movable operation may be replaced with one revolution after starting the loom, as in the previous embodiment.

The timing at which the feeding operation is prohibited may be during the braking period at the end of the cycle (FIG. 7). This figure shows an example in which the timing for prohibiting the unwinding operation is set at the same time as the generation of the loom stop signal due to warp stoppage. The woven fabric WF maintains the regular woven fabric position P, including when stopped, reversed, and moved ((2) to 5 in the same figure).
), after returning the actual weft pattern to the regular shedding pattern by movable, the weaving machine may be restarted by allowing the weft-feeding and weft-inserting operations. In this case, the movable motion before startup can be replaced with one rotation after startup without any problem.

In addition, when the prohibition period of the unfeeding operation is set in the middle of the braking period after the generation of the loom stop signal due to warp stoppage, the loom W
F is the period from when the loom stop signal is generated until the feeding operation is prohibited, when the woven fabric W is moved away from the regular loom position P.
It will move to the side. Therefore, this advanced amount is used to change the fabric WF to the warp Wa at a predetermined time during the movable operation before startup, or at a predetermined time during one rotation operation after startup.
By moving to the side, the Orimae WF returns to the regular Orimae position P.
19 can be returned.

In the above explanation, the allowable and
It goes without saying that all or part of the operations such as prohibition, instructions for reversing/moving, changing the shedding pattern, starting the loom, etc., may be manually operated instead of being automatically operated by the main controller C.

In general, when restarting the loom, the loom WF is adjusted as appropriate to the regular loom position P or to a position closer to the warp Wa than the regular loom position P, in order to prevent the loom from collapsing at the time of startup. Start later. In each of the above embodiments, the weaving WF is normalized by prohibiting or allowing the feeding operation when the loom is reversed or moved while the loom is stopped, or during one rotation operation after starting, without performing such an operation. It is now set at the weaving position P. However, as in the past, when restarting, the position of the woven fabric WF may be appropriately adjusted before starting. At this time, while the loom is stopped, the feeding operation is prohibited at the point when the loom WF does not go back to the warp Wa side from the regular loom position P, and when the loom is restarted, the position of the loom WF is changed to the normal loom position. After appropriately adjusting the position P or a position closer to the warp Wa than the regular cloth facing position P, it can be activated.

As described in detail, according to the first invention of this application,
By prohibiting the unfeeding operation at least during the reversal of the shedding cycle when normal weft insertion has been performed, the cloth front will not move backwards from the normal cloth cloth position to the warp side, so that the warp shedding is in the closed state. During standby, the woven fabric is not pushed into the woven fabric by the reed any more than necessary, which has the excellent effect of reliably preventing the formation of a thick film.

According to the second and third inventions, when the loom is restarted after stopping the warp, the regular shedding pattern is restored, and a series of operations other than warp repair can be easily automated. effective.

[Brief explanation of drawings]

1 to 4 show an embodiment, in which FIG. 1 is a diagram for explaining detailed operations, FIG. 2 is a conceptual diagram of the overall configuration, FIG. 3 is a diagram for explaining operations, and FIG. 4 is a program flowchart. FIG. 5 is a main part program flowchart showing another embodiment. FIGS. 6 and 7 are views corresponding to FIG. 3 showing different embodiments, respectively. FIG. 8 is a diagram corresponding to FIG. 3 showing a conventional example. Sm... Delivery permission signal C... Main control device SDa... Shedding control device Mla... Delivery control device M2a... Winding control device

Claims (1)

[Scope of Claims] 1) A method for stopping a loom in which the shedding pattern instruction of a warp-stopped loom is changed to plain weave, and the loom is reversed to standby in a plain weave closed state, at least in a shedding cycle in which regular weft insertion has been performed. A method for stopping a loom, characterized by prohibiting unwinding operation during reversal. 2) Following the method for stopping the loom described in claim 1, the warp is repaired and an instruction is given to return to the regular shedding pattern, and after one rotation of inching, the unwinding operation is allowed and the loom is started. A method of operating a loom characterized by: 3) Following the method for stopping a loom as described in claim 1, the warp is repaired and an instruction is given to return to the regular shedding pattern, the loom is started, and the unwinding operation is allowed after one rotation. How to operate a loom.