JP3337394B2 - Loom shedding control method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loom shedding control method for smoothly performing a necessary inching operation in a loom having an electric shedding device, and a device therefor.

[0002]

2. Description of the Related Art Opening devices for looms are mainly of a mechanical type in which a heald frame is linked to a main shaft via a cam mechanism or the like. However, an electric opening device in which an individual drive motor is provided for each heald frame is also known. (For example, JP-A-7-34355).

In this apparatus, since each heald frame is electrically linked to a main shaft via a drive motor, and each heald frame can be driven according to a predetermined drive pattern, even during weaving, the shed frame and the shed frame can be driven. It is possible to arbitrarily select and change the drive pattern of each heald frame based on this, and it is particularly suitable for weaving high value-added fabrics having a complicated weave structure. Note that the opening pattern referred to here is a pattern that designates the ascending or descending of each heald frame in each cycle of the loom in order to realize a predetermined weaving structure, and the driving pattern is defined in each cycle. A pattern indicating a change in the opening amount of each heald frame with respect to the rotation angle of the main shaft.

[0004]

According to such a conventional technique, the drive motor of the electric shedding device requires a stable low speed in an opening pattern in which the numbers of upper and lower threads forming the warp shedding are extremely unbalanced. There is a problem that the operation cannot be performed, which may hinder the jogging operation of the loom.

That is, the drive motor of the electric opening device is
Since it is necessary to mount a number equal to the number of heald frames on the loom frame, weaving a twill structure where the capacity must be minimized and miniaturization is required, for example, setting the warp tension to a large value At the time of inching, the upper thread,
The warp tension concentrates on the side of the lower thread where the number of threads is small, and the required driving force of a specific heald frame may be excessive. For example, FIG. 6A shows a so-called 3/1 oblique structure by opening four heald frames X = 4, 1, 2,... One by one in each cycle N = 1, 2,. Is shown when weaving is performed. At this time, each cycle N =
The upper thread SH1 and the lower thread SH2 at 1, 2,... Have a ratio of 1: 3 above and below the warp line WL, respectively (FIG. 6B), and as a result of lowering the weaving position, the upper thread SH is reduced.
Excessive warp tension may be applied to the specific heald frame X corresponding to 1.

In view of the above-mentioned problems in the prior art, it is an object of the present invention to change the driving pattern of the heald frame at the time of jogging from that at the time of weaving. It is an object of the present invention to provide a method of controlling the shedding of a loom and a device for controlling the shedding of the loom, which can smoothly perform the inching operation of the loom.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the structure of the present invention is used to jog a loom with an electric shedding device that drives each heald frame via a separate drive motor. Identify the heald frame to which the maximum warp tension is applied, change the drive pattern for weaving to the drive pattern for inching to reduce the warp tension during jogging of the specified heald frame, and The main point is to move the person.

In the driving pattern for inching, the opening amount of the heald frame other than the specified heald frame can be made smaller than the opening amount at the time of weaving, or the opening phase of the specified heald frame at the time of weaving can be reduced. From the aperture phase.

According to a second aspect of the invention, an opening pattern setting device for setting and storing an opening pattern, and a drive pattern for each heald frame during weaving and inching is generated based on the opening pattern from the opening pattern setting device. The gist of the present invention is to provide a drive pattern generator for controlling the drive motor of each heald frame in accordance with the rotation angle of the main shaft based on the drive pattern from the drive pattern generator.

[0010]

According to the first aspect of the invention, the heald frame to which the maximum warp tension is applied at the time of jogging takes, for example, a unique ascending or descending opening position different from the others in each cycle of the opening pattern. It can be easily specified as a heald frame. Therefore, if the drive pattern for weaving is changed to inching to reduce the warp tension at the time of inching of the heald frame specified in this way, excessive warp in all the heald frames including the specific heald frame. There is no possibility of tension being applied, and the loom can be smoothly moved.

The warp tension at the time of inching of a specific heald frame can be assured by reducing the opening amount of other heald frames or by shifting the opening phase of the specific heald frame. Can be relaxed. According to the former, the warp tension applied to another heald frame can be reduced, thereby reducing the warp tension concentratedly applied to a specific heald frame. According to the latter, for example, the warp tension of a specific heald frame is maximized before the warp tension applied to another heald frame is maximized,
This is because it is possible to avoid a situation in which both are simultaneously maximized at the time of jogging.

According to the configuration of the second aspect, the drive pattern generator generates a drive pattern for each heald frame at the time of weaving and at the time of jogging based on the opening pattern from the opening pattern setting device. Therefore, the drive pattern generator generates a drive pattern for relaxing the warp tension at the time of jogging of the specific heald frame as a drive pattern for jogging, whereby an excessive warp tension is applied to the specific heald frame. Can be effectively eliminated. This is because the rotation of the drive motor of each heald frame is controlled based on the drive pattern from the drive pattern generator via the drive control system.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

The shedding control device of the loom includes a shedding pattern setting device 11, a weaving and inching drive pattern generator 12,
12 and a plurality of drive control systems 20, 20,... (FIG. 1). A drive motor M is connected to the output of each drive control system 20, and the drive control system 20 and the drive motor M are connected to an electric shedding frame X mounted on a loom frame (not shown) and an electric shedding device of the loom. (FIG. 2).

The drive motor M is, for example, a link mechanism LK.
Through the heald frame X. That is, the short link arm LK1 at the shaft end of the drive motor M is connected to the link arm LK3a projecting from the drive shaft LK3 via the link lever LK2, and the link arms LK3b and LK3b on the drive shaft LK3 are connected. It is connected to a heald frame X via rods LK4, LK4. Therefore, if the drive motor M is rotated in one direction, the drive shaft LK3 can be rotated back and forth through the link arm LK1, the link lever LK2, and the link arm LK3a in the forward and reverse directions (in the direction of the arrow K1 in the figure). At this time, the heald frame X is connected to the link arms LK3b, L
It can be driven up and down via K3b and connecting rods LK4 and LK4 (in the direction of arrow K2 in the figure). The drive motor M can drive the heald frame X according to an arbitrary drive pattern by performing a speed change operation.

The link mechanism LK may be changed to any mechanism including a cam mechanism and a rack and pinion mechanism as long as the mechanism can convert the rotational motion of the drive motor M into the reciprocating motion of the heald frame X. Can be. The drive motor M
Depending on the form of the motion conversion mechanism, may be rotated back and forth in the opposite direction instead of rotating in one direction.

The output of the aperture pattern setting device 11 is branched and connected to drive pattern generators 12 and 12 (FIG. 1). The driving pattern generators 12 and 12 receive branch input of a loom operating state signal S1 from a loom controller (not shown).

An encoder EN for detecting the rotation angle θ of the main shaft A is connected to the main shaft A of the loom. Encoder E
The output of N is branched and connected to the position command unit 21 of each drive control system 20, and is also connected to the step counter 14. The step counter 14 can count and output the cycle N for each rotation of the main shaft A by inputting the rotation angle θ from the encoder EN. However, the step counter 14 includes the aperture pattern setting device 1
The repetition period Nr of the aperture pattern set to 1 is set and input, and the step counter 14 resets N = Nr + 1 to N = 1 and outputs it. The cycle N from the step counter 14 corresponds to the drive pattern generator 1
The input is branched to 2 and 12.

The outputs of the drive pattern generators 12, 12 are:
Each drive control system 20 is individually integrated and guided to the position command unit 21 of each drive control system 20. Each drive control system 2
0 is formed by cascading a position command unit 21 and a position control unit 22, and an output of the position control unit 22 is connected to the drive motor M. The output of the encoder EN1 connected to the drive motor M is connected to the position control unit 22.

The opening pattern setting device 11 stores and stores an opening pattern that defines a woven structure. On the other hand, the operating state signal S1 is supplied with a start command to the loom, and when the loom is operating normally, the fact is displayed as "weaving" and is continued until the loom stops. Also,
When the loom is stopped, the operation state signal S1 indicates that the loom is "stopping", and when a jogging operation command is given to the stopped loom, the effect is indicated as "during jog". Display as Therefore, when the operation state signal S1 is "weaving", one of the drive pattern generators 12 and 12 stops when the operation state signal S1 is "weaving". It is assumed that another one operates and the other stops. That is, based on the opening pattern from the opening pattern setting device 11, one of the drive pattern generators 12 and 12 operates to generate a weaving drive pattern during weaving, and the other operates and performs the sizing operation when inching. A driving pattern for movement can be generated.

For example, when the opening pattern to be set and stored in the opening pattern setting device 11 is as shown in FIG. 6A, the weaving drive pattern generator 12 has four heald frames X = 1, 2,. The corresponding drive control systems 20, 2
For .0, the weaving drive pattern shown by the solid line in FIG. Here, the drive pattern shown in FIG. 3 is such that the main shaft A is moved along with the progress of the cycle N = 1, 2,.
, The opening amount y of each heald frame X is smoothly changed up and down as a function of the rotation angle θ. However, the opening amount y> 0 indicates that the heald frame X assumes the ascending opening position, and the opening amount y <0 indicates that the heald frame X assumes the descending opening position.

In the weaving drive pattern shown by the solid line in FIG. 3, the heald frame X = 1 takes the maximum opening amount y = ym in the ascending row in the cycle N = 2. This shows that the maximum opening amount y = -ym is taken. Similarly, the heald frames X = 2, 3, and 4 respectively correspond to the cycle N =
By taking y = ym in 3, 4, and 1, and taking y = -ym in other cycles N, the aperture pattern of FIG. 6A can be realized as a whole. However, FIG.
The opening pattern of (A) has a repetition period Nr = 4,
Therefore, the driving pattern of FIG.
The pattern is a repeating pattern every four.

On the other hand, the position command section 21 of each drive control system 20
Receives the weaving drive pattern from the weaving drive pattern generator 12 and the rotation angle .theta. From the encoder EN, and outputs a rotation command signal S2 to the position control unit 22 to output a corresponding heald frame. The rotation of the drive motor M is controlled via the position control unit 22 so that the opening amount y of X matches the given drive pattern. That is, the position command unit 21
Receives the rotation angle θ, outputs the rotation amount Po of the drive motor M required to realize the opening amount y corresponding to the rotation angle θ as a rotation command signal S2, and the position control unit 22 controls the encoder EN1 Motor M fed back via
The rotation of the drive motor M can be controlled so that the rotation amount P = Po. However, the rotation command signal S2 is, for example, a positive / negative pulse train signal. The positive / negative sign indicates the rotation direction of the drive motor M, the number of pulses indicates the required rotation amount Po, and the pulse frequency indicates the rotation speed of the drive motor M. be able to.

Therefore, each heald frame X is moved during weaving.
It is driven via a corresponding drive motor M according to the rotation angle θ to realize a predetermined weaving drive pattern, and a predetermined opening pattern can be realized.

On the other hand, when the jogging operation command is given while the loom is stopped, the jogging drive pattern generator 12 operates via the operation state signal S1 to generate the jogging drive pattern (FIG. 3). dotted line). In other words, the driving pattern for inching at this time is such that, for each heald frame X, the maximum opening amount y = -ym of the descending line is changed to the intermediate opening amount y = -ym1 of the descending line (where |
ym1 | <| ym |).

Therefore, when the loom is stopped at the rotation angle θ of the cycle N = 3 and the inching is performed in the reverse rotation direction, each heald frame X is firstly stopped by the stopped weaving weaving machine. The driving is performed so as to eliminate the difference between the driving pattern of (1) and the driving pattern for inching. That is, the heald frame X = 1, 4
Is quickly returned from the descending maximum opening amount y = -ym to the intermediate opening amount y = -ym1, and thereafter, the rotation angle θ
Are driven based on the driving pattern for inching as the value changes. Further, the heald frame X = 3 goes down slightly from the opening amount y = -y3 (where | y3 | <| ym1 |) at the rotation angle θ = θ1 according to the rotation angle θ, and then the intermediate opening amount y = −. Maintain ym1.

On the other hand, in the cycle N = 3, the heald frame X = 2 in the ascending position ascends to the maximum ascending opening amount y = ym according to the rotation angle θ. At this time, the heald frame X = 2 The maximum warp tension to be applied is the other heald frame X =
Despite the fact that 1, 3, 4 are in the descending position, they are much smaller than those at the time of weaving. When the heald frame X = 2 takes the maximum opening amount y = ym in the ascending direction, at least the heald frame X = 3,
This is because the two sheets of No. 4 have a lower intermediate opening amount y = -ym1, and | ym1 | <| ym | (FIG. 4). However, in the drawing, the upper thread SH12 corresponds to the heald frame X = 2, and the lower threads SH21, SH23, SH24 correspond to the heald frames X = 1, 3, 4, respectively. In addition, needle thread SH1
2. The opening amount y of the lower thread SH21 is y = ym and y = -ym above and below the warp line WL, respectively.
That of SH24 is y = -ym1. Therefore, the heald frame X
, Including the drive motor M corresponding to = 2, there is no possibility of overload, and as a whole,
A smooth inching operation can be performed.

On the other hand, when the jogging operation is completed and the jogging operation command is released, the operation state signal S1 becomes "stopping",
The drive pattern generators 12, 12 stop. Then, after that, when a restart command of the loom is given, the operation state signal S1 becomes "weaving" again, and the weaving drive pattern generator 12 operates. Therefore, each drive control system 20
Can drive each heald frame X via the corresponding drive motor M based on the drive pattern for weaving.

In FIG. 3, only the heald frame X = 2 is in the ascending position in the cycle N = 3 in which the loom is stopped, and the maximum warp tension is applied in the subsequent inching operation in the reverse direction. In a unique state. In other words, the drive pattern for the jogging at this time specifies the heald frame X = 2 to which the maximum warp tension is applied at the time of jogging, and sets the maximum opening of the other heald frames X = 1, 3, 4 in descending order. Quantity y =
−ym1 is made smaller than the maximum opening amount y = −ym during weaving,
The warp tension during the inching of the specified heald frame X = 2 is set to be reduced. In other words, in FIG. 3, the driving pattern for the jogging corresponds to the cycle N =
When 1, 2,..., The specified heald frame X =
With respect to the heald frames X other than 4, 1, 2,..., The opening y in the descending direction is set to be smaller than that during weaving. The drive pattern for inching may be any shape as long as the opening amount y of the heald frame other than the specified heald frame X can be made smaller than that at the time of weaving. May be determined.

In FIG. 1, a step counter 1
The cycle N from 4 is performed by the drive pattern generators 12, 12
May be branched and input to the position command unit 21 of each drive control system 20. However, at this time, the drive pattern generators 12 and 12 generate drive patterns for weaving and jogging not as a function of the rotation angle θ but as a function of both the cycle N and the rotation angle θ.
Is the rotation amount P of the drive motor M required to realize the opening amount y of the drive pattern based on the cycle N and the rotation angle θ.
What is necessary is to calculate and output o. The drive pattern generators 12 and 12 may be integrated into one unit that generates and generates a drive pattern for weaving or inching according to the operation state signal S1.

[0031]

[Other Embodiments] The drive pattern for inching from the drive pattern generator 12 specifies the heald frame X to which the maximum warp tension is applied at the time of inching, and weaves the opening phase of the specified heald frame X. It may be shifted from the aperture phase at the time (FIG. 5).

For example, in FIG. 5, cycle N = 2
It is clear that when the loom stopped at the rotation angle θ = θ2 is jogged in the reverse direction, the maximum warp tension is applied to the heald frame X = 1. Therefore, if the weaving drive pattern of the heald frame X = 1 is shifted by the phase difference Δθ and set as the inching drive pattern (dotted line in the figure), the heald frame X = 1 is loaded during the inching. The warp tension decreases uniformly without increasing at all, and the heald frame X
= 1 is not likely to be overloaded. However, the phase difference Δθ is such that the heald frame X =
It is assumed that the opening amount y of one is determined to be y = ym.

In the above description, the drive pattern for jogging can be applied not only when the loom is jogged in the reverse direction but also when the loom is jogged in the normal direction. However, the drive pattern used for jogging in the forward rotation direction may be the same as that used for jogging in the reverse rotation direction, or another pattern may be prepared. For example, FIG.
The driving pattern for the inching can be applied as it is to the inching in the normal rotation direction, but the driving pattern in FIG. 5 is not always optimal for the inching in the normal rotation direction. In FIG. 5, in order to make inching in the normal rotation direction, the heald frame X is replaced with the heald frame X = 1.
This is because better results can be expected by shifting the weaving drive pattern of = 2 in the reverse direction by the phase difference Δθ1 (the dashed line in the figure).

[0034]

As described above, according to the first aspect of the present invention, when the loom is jogged, the warp tension during the jogging of the heald frame to which the maximum warp tension is applied at the time of jogging. By setting the drive pattern for jogging so as to reduce the load, there is no danger that an excessive load will be generated on the drive motors that drive each heald frame. There is an excellent effect that the inching operation can be performed smoothly.

According to the second aspect of the present invention, by providing the opening pattern setting device and the driving pattern generator for generating a driving pattern for each of weaving and jogging,
The drive pattern generator can generate an appropriate drive pattern for inching, and can easily implement the first invention.

[Brief description of the drawings]

FIG. 1 is a block diagram of the overall configuration

FIG. 2 is a perspective view of a main part.

FIG. 3 is an operation explanatory diagram.

FIG. 4 is an explanatory diagram of an operation.

FIG. 5 is a diagram corresponding to FIG. 3, showing another embodiment.

FIG. 6 is an explanatory view showing a conventional technique.

[Explanation of symbols]

 A: Spindle M: Drive motor X: Heald frame θ: Rotation angle y: Opening amount 11: Opening pattern setter 12: Drive pattern generator 20: Drive control system

Claims (4)

(57) [Claims] When a loom with an electric shedding device that drives each heald frame via an individual drive motor is jogged, the heald frame to which the maximum warp tension is applied at the time of jogging is specified. A weaving machine shedding control method, comprising: changing a weaving drive pattern to a jogging drive pattern so as to reduce a warp tension during hedging of a heald frame; 2. The shedding control method for a loom according to claim 1, wherein the jogging drive pattern has a hedging frame other than the specified heald frame having an opening smaller than an opening at the time of weaving. 3. The shedding control method for a weaving machine according to claim 1, wherein the driving pattern for the jogging shifts the specified opening phase of the heald frame from the opening phase during weaving. 4. An opening pattern setting device for setting and storing an opening pattern, and a driving pattern generating device for generating a driving pattern for each heald frame during weaving and inching according to the opening pattern from the opening pattern setting device. And a drive control system for controlling the rotation of the drive motor of each heald frame according to the rotation angle of the main shaft based on the drive pattern from the drive pattern generator.