JP2023006945A - Method for weaving woven fabric in loom - Google Patents

Abstract

To provide a method for weaving a woven fabric having a special feeling in a loom having a shedding mechanism which gives an opening motion to warp yarns by driving each heddle frame by a drive motor of exclusive use and controls each drive motor based on an operation pattern set for each heddle frame so that warp yarns intersect at a predetermined cross point.SOLUTION: An operation pattern set for at least a part of the target heddle frames is set as an alternative operation pattern set in such a manner that height position information on a cross point is assigned to each weaving cycle. The alternative operation pattern includes a first pattern consisting of a first set of weaving cycle and a second pattern consisting of a second set of weaving cycle. The first pattern is set to change the cross point to one side in the vertical direction, and the second pattern is set to change the cross point to the initial cross point.SELECTED DRAWING: Figure 1

Description

The present invention is a shedding device that imparts shedding motion to warp threads by driving the corresponding heald frame with a dedicated drive motor provided for each heddle frame, in which the warp threads cross at a predetermined cross point. The present invention relates to a weaving method in a loom equipped with a shedding device in which each drive motor is controlled based on an operation pattern set for each heald frame.

A loom having a shedding device as described above is disclosed, for example, in Japanese Unexamined Patent Application Publication No. 2002-200012. The shedding device disclosed in Patent Document 1 includes drive motors provided corresponding to each of a plurality of heald frames. In the shedding device, each heald frame is driven by a corresponding drive motor, and the drive is controlled based on an operation pattern set so that the warp threads cross at a predetermined cross point. It is configured.

JP-A-2007-9355

SUMMARY OF THE INVENTION An object of the present invention is to provide a weaving method for weaving a woven fabric having a special texture in a loom equipped with a shedding device as described above.

In the weaving method in the loom of the present invention, at least a portion of the heddle frames are defined as the target heddle frames, and the operation pattern set for the target heddle frames is height position information including warp cross timing and cross point information. It is assumed that a different operation pattern is set as an operation pattern for one repeat of the weaving pattern, which is set by assigning height position information, which is information relating to each weaving cycle, to each weaving cycle. The different operation patterns include a first pattern consisting of a first set weaving cycle, which is a predetermined number of weaving cycles of three or more, and one or more weaving cycles set after the first pattern. and a second pattern consisting of a second set weaving cycle which is characterized by each pattern being set as follows.

The first pattern is either (A) the crosspoint of each weave cycle in the first set weave cycle is on one side in the vertical direction with respect to the crosspoint of the preceding weave cycle, or (B) the first set The crosspoints in a plurality of weaving cycles less than the total number in the weaving cycle are on one side in the vertical direction with respect to the crosspoints in the preceding weaving cycle, and the crosspoints in the remaining weaving cycles are the crosspoints in the preceding weaving cycle. set to be the same. Also, the second pattern is set to change the crosspoints towards the first crosspoint of the first set weaving cycle.

Further, in the weaving method according to the present invention as described above, the above-described cross timing may be set at a time point different from the beating time point with the reed.

Further, the second set weaving cycle is composed of three or more weaving cycles, and the second pattern is composed of (C) each weaving cycle in the second set weaving cycle. or (D) said cross point in a plurality of weaving cycles less than the total number in said second set weaving cycle. A cross point may be set to be on the opposite side of said one side with respect to said cross point in the preceding weaving cycle, and said cross point in the remaining weaving cycles may be the same as said cross point in said preceding weaving cycle. good.

According to the weaving method in the loom of the present invention, the target heald frame is driven according to the first pattern, so that in the first set weaving cycle, the cross point in the vertical direction is set at the initial position of the first set weaving cycle. Weaving will occur in a manner that varies from the cross point in the weaving cycle to one side.

When the cross point changes, the position of the weft against the reed also changes when the weft inserted by the swinging reed is beaten into the cloth fell. As a result, the weft driving amount by the reed also changes. However, regarding the change in the amount of impact, the amount of impact increases as the material is impacted at a higher position on the reed, and the amount of impact decreases as the material is impacted at a lower position on the reed.

Therefore, in the first set weaving cycle, weaving is performed so that the cross points change as described above, so that the weaving in the first set weaving cycle is performed with a change in the pick-up amount. . Moreover, since the first pattern is set to generate such changes in the amount of weaving a plurality of times, the portion woven according to the first pattern (the portion woven in the first set weaving cycle) ) shows a change in texture due to a change in the amount of impact applied multiple times.

The operation pattern for controlling the driving of the drive motor is set for one repeat of the fabric pattern, and the fabric is woven by repeating the operation pattern. Then, the different operation pattern set for the target heald frame is, after such a first pattern, a second pattern for returning the cross point to the cross point in the first weaving cycle of the first set weaving cycle. is set to include Thereby, in the first set weaving cycle of each different operation pattern, the change of cross points in the same state is repeated. In the woven fabric woven in this manner, at least in the portion woven in the first set weaving cycle, a change in the feel appears as if the appearance of the weft yarns on the surface of the woven fabric is shaded. Therefore, according to the weaving method according to the present invention, it is possible to obtain a woven fabric having a special texture as compared with a woven fabric woven by a normal weaving method.

Further, in the weaving method according to the present invention, the weaving is performed with the cross timing set at a time different from the time of beating the reed, thereby obtaining a woven fabric having a more pronounced special texture (the gradation of the appearance of the weft yarns). can.

Specifically, if the cross timing is different from the beating time, the beating is performed with the warp yarns open. Therefore, in this case, the tension of the upper warp and the lower warp forming the shed at the time of beating is higher than when beating is performed with the warp closed. The tension of both warps corresponds to the amount of displacement of the warp yarns from the reference position (reference position) between the highest position and the lowest position of the heddle frame in the vertical direction. .

In addition, when the cross point is set on one side in the vertical direction with respect to the reference position, the tension of the upper warp and the lower warp at the time of beating is The warp threads on one side are higher than the warp threads on the other side. That is, in that case, both warps have a tension difference at the time of beating. Moreover, the tension difference increases as the distance of the cross point from the reference position increases. Therefore, in the case of weaving by changing the cross point to one side as described above, by setting the cross timing at a time different from the time of beating the reed, each time the cross point changes, the reed at the time of beating can be adjusted. Weaving is performed in such a manner that the tension difference between the upper warp and the lower warp is changed.

By carrying out weaving in this way, the warp yarns opening on one side are beaten while being gradually pulled strongly. A fabric with more pronounced variation is obtained.

Further, with respect to the second pattern described above, the second set weaving cycle is made up of three or more weaving cycles, and the second pattern is set as (C) or (D). If so, the change of the crosspoints in the second set weaving cycle for returning the crosspoints to the crosspoints of the first weaving cycle in the first set weaving cycle is performed in a plurality of times. As a result, the drive motors can be driven to change the cross point in the second set weaving cycle without imposing an excessive load on each drive motor.

1 is a block diagram showing an example of a shedding device for a loom according to the present invention; FIG. It is an example of a setting screen on which driving information is set. It is an example of a setting display screen of height position information. It is an aperture curve of the first pattern in the example. It is an aperture curve of the second pattern in the example. It is an example of a setting screen in which drive information different from the embodiment is set. FIG. 4B is another example of the aperture curves for the first pattern and the second pattern; FIG.

An embodiment (example) of a weaving method in a loom according to the present invention will be described below with reference to FIGS. 1 to 5. FIG.

FIG. 1 shows an example of a shedding device 1 for a loom according to the present invention. The shedding device 1 includes a plurality of heald frames 2 , a dedicated drive motor 21 provided for each heald frame 2 , and a motion conversion mechanism 22 connecting the heald frames 2 and the drive motor 21 . The shedding device 1 is constructed such that the rotation of the output shaft of each drive motor 21 is converted by the motion conversion mechanism 22, and the corresponding heald frame 2 is reciprocated in the vertical direction to impart shedding motion to the warp threads. . That is, the shedding device 1 is constructed so that each heald frame 2 is independently driven by its exclusive drive motor 21 . Incidentally, this embodiment is an example in which weaving is performed using 12 heald frames 2 .

The motion conversion mechanism 22 is configured to include, for example, a crank mechanism. is located at the highest position or the lowest position. In addition, in such a shedding device 1, between the rotation phase with respect to the top dead center and the rotation phase with respect to the bottom dead center, reverse driving is performed at a rotation angle smaller than the angle range (180°). , the upper shedding position of the heald frame 2 (the position corresponding to the position of the upper warp in the warp shedding) and the lower shedding position (the position corresponding to the position of the lower warp in the warp shedding) to the mechanical configuration of the motion conversion mechanism 22. It can be any position without limitation. Also in the shedding device 1 of the present invention, the driving motor 21 is reversely driven in this way when shedding motion is applied to the warp yarns.

The shedding device 1 also includes a shedding control device 3 that controls driving of each drive motor 21 . The shedding control device 3 has a memory 31 and a drive controller 32 connected to the memory 31 . The storage unit 31 stores drive information including a shedding pattern corresponding to the weave structure of the fabric to be woven and an operation pattern set for each heald frame so that the warp threads cross at a predetermined cross point. are stored so as to correspond to each heald frame 2 . As for the shedding pattern in the drive information, the position of the heald frame 2 (upper edge position, lower edge position) is set for each weaving cycle, and is set for each heald frame 2 . In this embodiment, as shown in FIG. 2, a plain weave opening pattern is set.

The loom also has an input setter 5 for inputting and setting weaving conditions, etc. The input setter 5 is also connected to the memory 31 of the shedding control device 3 . Driving information including the above-described opening pattern and the like is input and set by the input setting device 5 and stored (set) in the storage device 31 . Incidentally, as the input setting device 5, for example, a touch panel type one having a display device and capable of inputting the opening pattern or the like by operating a setting screen on the display device is used.

Further, the drive controller 32 is configured to control the drive of each drive motor 21 based on the drive information set in the memory 31 . The drive controller 32 is also connected to a spindle-side encoder 41 provided on the spindle 4 of the loom and for detecting the crank angle. When a crank angle signal corresponding to the detected crank angle is input from the spindle-side encoder 41, the drive controller 32 is configured to control driving of the drive motor 21 based on the crank angle signal. there is

Further, the drive controller 32 is connected to an opening-side encoder 23 that is provided for each drive motor 21 and detects the rotation angle of the output shaft of the corresponding drive motor 21 . The drive controller 32 is also configured to perform feedback control based on the rotation angle signal by inputting the rotation angle signal corresponding to the rotation angle of each drive motor 21 from the opening-side encoder 23 . ing.

As described above, the shedding device 1 reciprocates each heald frame 2 by controlling the drive of each drive motor 21 by the shedding control device 3 based on the drive information (shedding pattern, operation pattern). It has become. In the present invention, at least some of the heddle frames are defined as the target heddle frames, and the motion patterns set for the target heddle frames are height position information including the cross timing of the warp yarns, which is information about the cross points. is set as a different operation pattern, which is an operation pattern for one repeat of the weaving pattern set in such a manner that the height position information is assigned to each weaving cycle. Also, the alternative operation pattern includes a first pattern consisting of a first set weaving cycle and a second pattern set after the first pattern and consisting of a second set weaving cycle. set.

In addition, in the present embodiment, all the heddle frames 2 (12 frames) used for weaving are set as target heald frames, and the different operation patterns described above are set for all the 12 frames. Also, the number of weaving cycles of the first set weaving cycle and the number of the second set weaving cycle are set to 10 weaving cycles, respectively. Furthermore, the first pattern is set such that the crosspoints of each weaving cycle in the first set weaving cycle are located above the crosspoints of the preceding weaving cycle ((A) described above). . In the second pattern, the crosspoints of each weaving cycle in the second set weaving cycle are located below the crosspoints of the preceding weaving cycle, and the crosspoints are located at the beginning of the first set weaving cycle. It is set as a pattern that changes toward the cross point in the weaving cycle ((C) described above).

FIG. 3 shows a display screen displayed on the input setting device 5, which is a setting display screen 60 that displays setting values for each of a plurality of setting items related to the height position information. In the setting display screen 60 of the illustrated example, a setting value display field is provided for each setting item of a plurality of height position information. Thus, in this embodiment, height position information is configured by a plurality of setting items. The setting items are cross timing, opening position (upper opening position, lower opening position), and dwell (upper dwell, lower dwell). The details of the setting items are as follows.

The cross timing is the timing at which the warp threads cross when the heald frame 2 (driving motor 21) is driven based on the height position information. Then, in the display column of "cross timing" of the setting display screen 60, the setting value of the cross timing set by the crank angle is displayed.

The shedding position (upper shedding position, lower shedding position) is the heddle frame 2 corresponding to the position of the warp at the maximum shedding of the warp when the heddle frame 2 (driving motor 21) is driven based on the height position information. is the position of More specifically, for each heald frame 2, the position of the heald frame 2 when the warp of the heald frame 2 becomes the upper warp of the warp shedding (upper shedding position), and the position of the heald frame 2 when it becomes the lower warp of the warp shedding ( lower opening position) is set as the opening position.

In this embodiment, the setting is made by the distance (mm) from the highest position and the lowest position. That is, the upper opening position is set as the distance from the highest position, and the lower opening position is set as the distance from the lowest position. For example, when the set value is 5 mm, the set value indicates that the upper opening position (lower opening position) is set to a position 5 mm lower (higher) than the highest position (lowest position). Such set values are displayed in the display fields for "upper opening position" and "lower opening position" on the setting display screen 60. FIG.

The dwell (upper dwell, lower dwell) is a period during which the heald frame 2 is held at the maximum opening position (upper opening position, lower opening position). However, in this embodiment, the set value of the dwell is set so that the dwell period is within the crank angle range. For example, for the upper dwell (lower dwell), if the set value is n°, the period (crank angle range) is n°. Such setting values are displayed in the display columns of "upper dwell" and "lower dwell" on the setting display screen 60. FIG.

The drive of the heald frame 2 based on the set value is performed on the basis of the time point 180° before the above cross timing. Specifically, when the set value of the cross timing is 310° and the set value of the dwell is 80°, the drive of the heald frame 2 is set 40° from the reference 130°, which is 180° before the cross timing. At 90 degrees forward, the heald frame 2 reaches the upper opening position (lower opening position), and at 170 degrees after 40 degrees from the reference, the heald frame 2 begins to descend (raise).

Further, in this embodiment, each piece of height position information can be distinguished by color, and the setting No. on the setting display screen 60 can be distinguished. is provided next to the display (number) indicating the color assigned to the height position information. In the illustrated example, the color has a different degree of shading according to the setting of the height position information.

FIG. 2 shows a setting screen displayed on the input setting device 5, which is a pattern setting screen 50 for setting driving information for driving the heald frame 2. As shown in FIG. The drive information includes the shedding pattern described above and an operation pattern (another operation pattern) for one repeat of the weaving pattern set by assigning height position information to each weaving cycle. The pattern setting screen 50 also includes a setting display field 51 for displaying drive information, as shown on the left side of the screen. In the setting display field 51, as in the well-known shedding pattern setting screen, mass frames 52 are arranged in a matrix, and the rows of the mass frames 52 correspond to the weaving steps (weaving cycles), and the columns correspond to the weaving steps (weaving cycles). It is a display column corresponding to the heald frame 2 . Accordingly, a number indicating the "step number" is displayed on the left side of the square frame 52 in the setting display field 51, and a number indicating the "frame number" of the heald frame 2 is displayed in the upper row.

Note that in the illustrated example, the setting display field 51 displays the step number. 1 to 20 square frames 52 are displayed. However, this is because the display range of the setting display field 51 in the illustrated example is for 20 weaving steps, and the number of rows of the mass frame 52 is provided more than 20 weaving steps. And step no. The square frames 52 after 21 are displayed by scrolling the display in the setting display column 51 .

In the shedding pattern setting screen, generally, the display color of each square frame 52 indicates whether the frame position is set to the top position or the bottom position in each weaving step. It has become. However, in the illustrated example, since the height position information is distinguished by the display color as described above, the display of the frame position is distinguished by the display within the square frame 52. . Specifically, the grid frame 52 set at the top position is indicated by a normal single frame, and the grid frame 52 set at the bottom position is indicated by a double frame. In the illustrated example, frame No. The shedding patterns are set to 1 to 12, indicating that weaving is performed using 12 heald frames 2. FIG. In addition, in this embodiment, since the opening pattern of the plain weave is set as described above, the setting state is as shown in the drawing.

Further, the input setting device 5 is configured so that an arbitrary range including a plurality of square frames 52 can be specified on the setting display field 51 on the pattern setting screen 50 by touch operation or the like. Furthermore, the pattern setting screen 50 includes a setting button 53 arranged on the right side of the screen in addition to the setting display field 51 as described above. The setting button 53 is a button for displaying on the screen another window (not shown) for creating height position information to be assigned to each weaving step in the range of the specified square frame 52. . The input setting device 5 is configured to automatically create the height position information to be assigned based on the information input in the separate window.

The details of creating and assigning the height position information are as follows. In this embodiment, all 12 heald frames 2 are assumed to be the target heald frames, and the different operation patterns described above are set for all 12 frames. As for the first pattern and the second pattern included in the operation pattern, the set weaving cycle for both patterns is 10 weaving cycles (10 weaving steps) as described above, and the first 10 weaving steps (step No. 1 to 10), and the second pattern is set for the following 10 weaving steps (Step Nos. 11 to 20). That is, the operation pattern in this example is composed only of the first pattern and the second pattern, and consists of 20 weaving steps in total (one repeat of the weaving pattern). In setting the operation pattern, the first pattern is set first, and then the second pattern is set.

In the setting of the first pattern, first, the frame number corresponding to the heddle frame 2 to be set is displayed by a touch operation or the like on the setting display field 51 . 1 to 12, the step numbers corresponding to 10 weaving steps. Assume that the square frame 52 in the range of 1 to 10 is specified. Then, when the setting button 53 is touch-operated in that state, another window as described above is displayed on the pattern setting screen 50 .

In this separate window, for example, for the first weaving step and the last weaving step in the specified range, the shedding amount and the cross point are set. Further, in this case, regarding the opening amount, for example, the maximum opening amount, which is the opening amount when each heald frame 2 is positioned at the highest position or the lowest position, is used as a reference (100%), and the maximum opening is It is set as a percentage (%) of the amount. Further, with respect to the cross point, for example, a position (reference position) in the middle between the highest position and the lowest position in the vertical direction is used as a reference, and the distance from the reference position is ±N mm (plus is greater than the reference position). (minus indicates lower than the reference position).

When those pieces of information (shedding amount, cross point) are set in the separate window, the set values of the shedding amount and cross point for the 1st step and the 10th step, and the number of weaving steps of the first pattern (1st (set number of weaving cycles), height position information for 10 weaving steps (setting Nos. 1 to 10) is automatically created in the input setter 5 .

Note that this embodiment is an example in which cross points are changed by changing the upper opening position and the lower opening position for each weaving step. Therefore, the input setter 5 obtains set values for the upper shedding position and the lower shedding position in each weaving step based on the information set as described above. As for the cross timing and dwell, which are the setting items of the height position information, the setting values are inputted on another setting screen in the input setting device 5, and the setting values are used. Incidentally, in this example, the set value of the cross timing is set to 310 degrees, and the set value of the dwell is set to 80 degrees.

Then, height position information for 10 weaving steps of the first pattern is obtained from the set values of the upper shedding position and the lower shedding position obtained as described above, and the set values of cross timing and dwell set in advance. is created. The height position information thus created is displayed on the setting display screen 60 as shown in FIG. It should be noted that in the illustrated example, each piece of height position information has a set number. Although displayed as 1 to 10, this setting number. 1 to 10 correspond to the weaving steps (Step No.) 1 to 10 in that order. Then, the setting no. Height position information of 1 to 10 is automatically assigned to each weaving step in the input setter 5 along with its creation.

Incidentally, the first pattern of this embodiment is, as described above, a pattern in which the cross point of each weaving cycle in the first set weaving cycle is located above the cross point of the preceding weaving cycle. Therefore, for the set values of the "upper shedding position" and "lower shedding position" of each weaving step in the height position information, as displayed on the setting display screen 60, the same value for the upper shedding position gradually increases. The set value is such that the lower opening position is gradually increased by the same value.

For details on the calculation of the set values of the "upper shedding position" and "lower shedding position" in this example, based on the set values of the shedding amount and the cross point in the first weaving step and the last weaving step in the specified range First, the set values of the upper and lower shedding positions in the first weaving step and the last weaving step are calculated. Next, the set values of the weaving steps (step No.) 2 to 9 between the first weaving step and the last weaving step are changed from the set values of the first weaving step to the last weaving step according to the number of weaving steps. It is calculated so that the value changes evenly up to the set value of the step. In the illustrated example, the set value of the upper shedding position is decreased by 1 mm for each weaving step, and the set value of the lower shedding position is increased by 1 mm for each weaving step.

Thus, once the first pattern has been established by creating and assigning its height position information, then the second pattern is established. However, the setting is basically the same as the setting of the first pattern, and illustration is omitted.

In the setting of the second pattern, as in the setting of the first pattern, first, the frame number is changed by a touch operation or the like on the setting display field 51 . Step Nos. 1 to 12 correspond to the second set weaving cycle (10 weaving steps) following the first set weaving cycle (10 weaving steps). Assume that the square frame 52 in the range from 11 to 20 is specified. Then, the user touches the setting button 53 to display another window, and sets the shedding amount and the cross point for the first step (step No. 11) and the tenth step (step No. 20) in the second set weaving cycle. do.

The second pattern is, as described above, a pattern set so as to change the crosspoints toward the crosspoints in the first weaving cycle of the first set weaving cycle. Therefore, the set values of the cross points set in the separate window are the same for the cross points for the first step of the second set weaving cycle as the cross points for the tenth step of the first set weaving cycle, The crosspoint for the tenth step of the second set weaving cycle is the same as the crosspoint for the first step of the first set weaving cycle. Also, the opening amount is the same as that of the first pattern.

In addition, the second pattern in this embodiment is a pattern in which the crosspoints of each weaving cycle in the second set weaving cycle are positioned below the crosspoints of the preceding weaving cycle. . Therefore, in the input setting device 5, the height position information for 10 weaving steps of the second pattern is automatically obtained based on the conditions, the set value in the separate window, and the second set number of weaving cycles. created. In this example, the height position information thus obtained is obtained by inverting the height position information for 10 weaving steps of the first pattern (set Nos. 1 to 10 in reverse order). Become. That is, in the height position information of the second pattern, the set value of the upper shedding position increases by 1 mm for each weaving step, and the set value of the lower shedding position decreases by 1 mm for each weaving step. Then, the height position information thus created is automatically assigned to each weaving step (step Nos. 11 to 20) by the input setter 5 along with the creation.

By setting the first pattern and the second pattern in this way, an operation pattern (another operation pattern) of 20 weaving steps consisting of the first pattern and the second pattern is set. The operation pattern consisting of the 20 weaving steps is the operation pattern for one repeat of the weaving pattern. Furthermore, as a result of setting the operation pattern for one weave pattern repeat, the setting display field 51 on the pattern setting screen 50 has different display colors assigned to each piece of height position information as described above ( the degree of gradation is different), step No. In the range from 1 to 20, it is displayed as shown in FIG. As a result, the operator can easily grasp the setting state of the operation pattern.

By controlling the drive of each drive motor 21 based on the operation pattern set in this manner, the corresponding heald frame 2 is driven. In this embodiment, the displacement speed is constant during the period excluding the acceleration period during which the heald frame 2 begins to displace toward the opening position on the opposite side and the deceleration period before reaching the opening position. and Also, in this embodiment, the displacement speed (upward speed) when displacing the heald frame 2 toward the upper opening position is assumed to be the same speed in each weaving step. Similarly, the displacement speed (lowering speed) when displacing the heald frame 2 toward the lower opening position is assumed to be the same speed in each weaving step. However, as described above, the set values for the upper dwell and the lower dwell are the same, and the timings at which the heald frame 2 reaches the upper opening position and the lower opening position are the same in each weaving cycle, and the continuous weaving cycle Since the amount of displacement from the upper opening position to the lower opening position and the amount of displacement from the lower opening position to the upper opening position are different, the rising speed and the falling speed are different (in the first pattern, the rising speed is large). , the descending speed is large in the second pattern).

As a result, each heald frame 2 is driven to operate in the manner shown by the shedding curves in FIGS. 4 shows the shedding curve of the heald frame 2 when each drive motor 21 is driven based on the first pattern, and FIG. 5 shows each drive motor 21 based on the second pattern. 2 shows the shedding curve of the heald frame 2 when driven. More details about the operation of the heald frame 2 are as follows.

First, in the first step of the operation pattern, step No. 1 of the first pattern. 1, the upper opening position is 13 mm and the lower opening position is 3 mm. , to reach a position 13 mm lower than the highest position at a crank angle of 90°. Similarly, the heald frame 2 whose first step position is set to the lower opening position is driven at a crank angle of 90° so as to reach a position 3 mm higher than the lowest position.

After each heald frame 2 reaches the upper opening position or the lower opening position, it stays at the opening position for a crank angle range of 80° set as a dwell, and then the crank at the end of the dwell. At an angle of 170°, it is driven to displace toward the opposite opening position (opening position based on opening pattern and height position information).

The heddle frame 2 positioned at the upper opening position in the first step is displaced toward the lower opening position set in the second step, and the crank angle of 170° and the crank angle of 90° in the next weaving step are displaced. At a cross timing of 310° which is a crank angle intermediate between , the intermediate position between the upper opening position of the first step and the lower opening position of the second step is passed. Similarly, the heald frame 2 positioned at the lower opening position in the first step passes through the intermediate position between the lower opening position in the first step and the upper opening position in the second step at the cross timing of 310°. At the intermediate position, the upper warp and the lower warp cross each other (all the warps are aligned). Further, in both the first step and the second step, the distance from the reference position to the opening position is greater at the lower opening position than at the upper opening position. , below the reference position.

In the second and subsequent steps, as in the first step, each heald frame 2 is driven based on the shedding pattern and height position information set for each weaving step. Note that in the first pattern, as described above, step No. The set value of the upper shedding position in the height position information set to 1 to 10 is decreased by 1 mm for each weaving step, and the set value of the lower shedding position is increased by 1 mm for each weaving step. As a result, the cross point in the first set weaving cycle is displaced upward by 1 mm for each weaving cycle. Incidentally, in this example, the set values for the upper opening position and the lower opening position in the height position information of the 6th step are the same, and the cross point in the vertical direction is a position that substantially coincides with the reference position in the 6th step. becomes. Therefore, the cross point is displaced below the reference position up to the fifth step, and displaced above the reference position from the seventh step to the tenth step.

Also in the second set weaving cycle in which the second pattern is set, the heald frame 2 is driven in the same manner as described above in each weaving step. However, the step No. where the second pattern is set. 11 to 20, the setting values of the upper opening position and the lower opening position are increased by 1 mm for each weaving step, and the setting value for the lower opening position is increased by 1 mm for each weaving step, as described above. It's getting smaller. As a result, the cross point in the second set weaving cycle is displaced downward by 1 mm per weaving cycle.

Then, the setting values of the upper shedding position and the lower shedding position in the height position information set in the twentieth step, which is the last weaving step of the operation pattern for one repeat of the weaving pattern, are set in the first step, which is the first weaving step. Since the set values of the upper opening position and the lower opening position are the same, the cross point of the 20th step is at the same position as the cross point of the 1st step. That is, the cross point displaced upward from the position of the first step of the first set weaving cycle (first pattern) is at the last 20th step of the second set weaving cycle (second pattern). It will be returned to its original position. Incidentally, in the second set weaving cycle, the cross point is displaced above the reference position up to the 14th step, and displaced below the reference position from the 15th to 20th steps.

In weaving, each heald frame 2 is driven according to an operation pattern (another operation pattern) corresponding to one repeat of the weave pattern consisting of the first pattern and the second pattern. Repeat every 20 weaving steps consisting of a cycle and a second set weaving cycle.

According to the weaving method described above, weaving is performed by controlling the driving of each drive motor 21 according to the different operation patterns consisting of the first pattern and the second pattern set as described above. As a result, in the weaving, a woven fabric having a special texture is obtained. More specifically, when the cross point changes, the position at which the weft yarn hits the reed during beating also changes. Furthermore, when the position changes, the weft driving amount by the reed also changes. However, the stroke amount increases the higher the position on the reed where the weft hits the reed during beating, and decreases the lower the position.

In addition, according to the weaving method of the present embodiment as described above, in the 1st to 10th steps of weaving in the first pattern, the cross points gradually change upward at each weaving step. Since the weaving is performed at the beginning of the weaving process, the amount of the weft yarn applied is gradually increased in each weaving step. As a result, in the portion woven according to the first pattern, a change in texture appears such that the appearance of the weft yarn on the surface of the woven fabric gradually darkens as the amount of weaving changes.

The second pattern is a pattern for returning the cross points changed in the first pattern to the position of the first weaving step. The number of cycles is 10 weaving steps, and the cross point is changed toward the position of the first weaving step every weaving step over the ten weaving steps. Therefore, even in the 11th to 20th steps of the second pattern, weaving is performed such that the weft driving amount changes for each weaving step over the 10 weaving steps. Since the amount of weft is gradually reduced, the surface of the fabric woven according to the second pattern shows a change in texture such that the appearance of the weft yarn gradually becomes lighter.

Therefore, according to the weaving method based on the different operation pattern consisting of the first pattern and the second pattern, the fabric has a special texture on its surface compared to the fabric woven by the ordinary weaving method. can be obtained. Moreover, since the second pattern for returning the cross points to the position of the first weaving step is set to gradually change the cross points over ten weaving steps as described above, in the second pattern The drive motors 21 for changing the crosspoint can be driven without imposing an excessive load on each drive motor 21 .

It should be noted that the weaving method of the present invention is not limited to the one embodiment (the above-described example) described above, and can be implemented in other embodiments (modifications) such as those described below.

(1) As for the different operation patterns, the different operation patterns of the above-described embodiments are the first pattern for shifting the cross points upward and the first pattern for shifting the cross points downward to return them to the position of the first weaving step. and a second pattern for That is, the different operation pattern of the above embodiment is set as a pattern in which the cross point is moved upward and then returned to its original position. However, the alternative operation pattern in the present invention is set such that the first pattern displaces the cross point downwards and the second pattern displaces the cross point upwards to the position of the first weaving step. It may be set as a pattern that returns to . In other words, the different motion pattern may be set as a pattern in which the crosspoint is changed downward and then returned to its original position.

(2) Regarding the first pattern, the first pattern of the above example is located on one side of the crosspoint of the preceding weaving cycle with the crosspoint of each weaving cycle in the first set weaving cycle ( It is set as a pattern like the above (A)). That is, the first pattern of the above example is a pattern in which the cross points are (continuously) changed for each weaving cycle (weaving step). However, in the present invention, the first pattern is not limited to the pattern (A) described above, and may be set as the pattern (B) described above.

Specifically, the first pattern is on one side in the vertical direction with respect to the crosspoints of the preceding weaving cycle with the crosspoints in a plurality of weaving cycles less than the total number in the first set weaving cycle, and the remaining weavings. The pattern may be set such that the crosspoints in the cycle are the same as the crosspoints in the preceding weaving cycle ((B) described above). That is, the first pattern is set as a pattern in which the cross points are changed only in some (two or more) weaving steps in the first set weaving cycle, and the cross points are not changed in the other weaving steps. May be.

Furthermore, although the first pattern in the above example consists of 10 weaving cycles, the first pattern in the present invention may consist of 3 or more weaving cycles. Specifically, the first pattern in the present invention is a pattern in which the cross point is changed multiple times toward one side in the vertical direction ((A) or (B) described above) in the first set weaving cycle. is. Therefore, the first pattern consists of at least 3 weaving cycles to achieve the multiple cross point changes.

(3) Regarding the second pattern for returning the cross points to the position of the first weaving step, the second pattern of the above embodiment is a pattern in which the cross points are changed a plurality of times. The second pattern then positions the crosspoints of each weaving cycle in the second set weaving cycle downward with respect to the crosspoints of the preceding weaving cycle, and places the crosspoints in the first set weaving cycle. The pattern is changed toward the cross point in the first weaving cycle ((C) described above). That is, the second pattern is also a pattern in which the cross points are changed for each weaving step, like the first pattern of the above embodiment. However, in the present invention, the second pattern is not limited to the pattern (C) described above, and may be set as the pattern (D) described above.

Specifically, the second pattern is on one side opposite to the crosspoints of the preceding weaving cycle with the crosspoints in a plurality of weaving cycles less than the total number in the second set weaving cycle, and the remaining The pattern may be set such that the crosspoints in the weaving cycle are the same as the crosspoints in the preceding weaving cycle ((D) described above). That is, the second pattern is set such that the cross points are changed only in some (two or more) weaving steps in the second set weaving cycle, and the cross points are not changed in the other weaving steps. May be.

In addition, although the second pattern in the above example is composed of 10 weaving cycles, which is the same as the first set number of weaving cycles of the first pattern, it is not limited to this, and the first set number of weaving cycles is It may consist of a different number of weaving cycles. However, the second pattern is set so as to change the cross points over a plurality of weaving steps as in the above embodiment, considering the load applied to each drive motor 21 in the second set weaving cycle. It is preferable to be However, when the shedding device is configured in such a manner that the load applied to each drive motor 21 is tolerable (for example, when a drive motor with a large capacity is employed), the second pattern is , the pattern may be set such that the cross point is returned to the first cross point in one weaving step.

(4) With regard to the different operation patterns set for the target heald frames, in the above embodiment, all the heald frames 2 used for weaving are set as the target heald frames, and then one ( 1 type) is set as a common pattern. However, the present invention is not limited to this, and a plurality of types of different operation patterns in which the settings of the first pattern and/or the second pattern are different may be set to any of the target heald frames. can be For example, as shown in FIG. Frames No. 1 to No. 8 have different motion patterns such that the cross points are moved upward and then returned to their original positions. For 9 to 16, a different operation pattern may be set such that the cross point is changed downward and then returned to the original position.

Further, in the present invention, the target heald frames for which different operation patterns are set are not limited to all the heald frames 2 used for weaving as in the above embodiment. That is, only some heald frames may be set as the target heald frames, and the other heald frames may be set as the heald frames driven by a normal operation pattern (a pattern in which cross points are not changed).

(5) Regarding the change of the cross point in different operation patterns, in the above embodiment, the ascending speed and descending speed of the target heald frame are determined as the same speed in each weaving step. In addition, the upper and lower opening positions are changed for each weaving step in order to realize the change from the cross point of the first weaving step set in the separate window to the cross point of the last weaving step. It is a thing. However, in the present invention, the change of the cross points is not limited to changing the upper and lower shedding positions, and the upper and lower shedding positions of each weaving step are assumed to be the same. , the displacement speed of the heald frame in each weaving step may be changed.

Specifically, when it is assumed that the upper shedding position and the lower shedding position are the same in each weaving step and the dwell and cross timing are the same in each weaving step as in the above embodiment, the heddle frame Regarding the displacement speed from the crank angle at which displacement starts (at the end of the dwell) to the cross timing, for example, the displacement speed of the heddle frame from the lower opening position is gradually increased for each weaving step, and the displacement speed of the heddle frame from the upper opening position If the displacement speed of is gradually slowed for each weaving step, the cross point will gradually rise for each weaving step. If the upper opening position and the lower opening position are the same, and the cross point at the same cross timing rises gradually, the displacement speed from that cross timing to the point at which the heald frame reaches the upper opening position is naturally slow. As a result, the displacement speed until reaching the lower opening position naturally increases.

Therefore, in the case of the above premise, the height position information assigned to each weaving step includes the set value of the cross point to be changed (for example, the distance from the reference position is set as ±N mm). be included. In addition, the shedding control device 3 determines the displacement speed and cross timing up to the cross timing when the heald frame is displaced in the manner described above, according to the cross point in each weaving step set in the height position information. The displacement speed from the timing may be obtained, and the drive motor 21 may be controlled based on the displacement speed. In that case, the heald frames are displaced in the manner shown in FIG. 7, and the cross points change as shown.

(6) Regarding the cross timing, the cross timing in the above embodiment is set at a point (crank angle of 310°) different from the beating point. However, in the weaving method of the present invention, the cross timing may be any appropriate timing for weaving, like the cross timing in conventional weaving. may be set at the same point in time (crank angle 360°). By changing the cross points in the manner described above to change the amount of weaving, the feel of the fabric surface changes regardless of the cross timing.

However, in the present invention, by setting the cross timing at a time different from the beating time, as in the above embodiment, the fabric having a special texture according to the present invention can be woven. can be made more prominent. More specifically, when the cross timing is set at a time different from the beating time, beating is performed with the warp shed, so the tension of the upper warp and the lower warp forming the shed at the time of beating is It is higher than when reed beating is performed with the warp closed. Further, the tension corresponds to the amount of warp displacement from the reference position. Moreover, when the cross point is above the reference position, for example, the tension of the upper warp is higher than the tension of the lower warp at the time of beating. When weaving is performed by gradually shifting the cross points upward, the tension difference between the upper warp and the lower warp gradually increases.

Therefore, if the cross timing is set at a time different from the beating time, the upper warp is beaten while being gradually pulled strongly. A woven fabric having a more pronounced change in texture as described above can be obtained. That is, in the weaving method of the present invention, in order to achieve the purpose of weaving a fabric having a special feel, it is more preferable to set the cross timing at a time different from the beating time.

(7) Regarding the height position information, the height position information of the above embodiment is composed of cross timing, opening position (upper opening position, lower opening position), and dwell (upper dwell, lower dwell). In addition, regarding the set value of the opening position, the set value of the upper opening position is set as the distance (mm) from the highest position, and the set value of the lower opening position is set as the distance (mm) from the lowest position. ) is set as However, in the present invention, the set value of the opening position is not limited to such setting, and may be set as a distance (mm) from the reference position with reference to the reference position. Furthermore, in the present invention, the set value is not limited to the length of the distance from the reference as described above. For example, the distance from the reference position to the highest position (the lowest position) As a reference (100%), the ratio (%) to the reference may be used as the set value.

Further, the height position information is not limited to the cross timing, opening position, and dwell, and may include cross points as described above. Moreover, the set value of the cross point is not limited to being set as the distance ±N mm from the reference position as described above, and is set from the highest position (or the lowest position) or the set opening position. may be set as a distance N mm. Furthermore, the set value of the cross point is not limited to the length of the distance itself, for example, the distance from the set opening position to the reference position is taken as the reference (100%), (%) may be set. Incidentally, even when the crosspoints are set in separate windows as in the above embodiment, the set values of the crosspoints may be set as percentages (%) as described above.

In the above-described embodiment, the height position information for the weaving step selected on the setting display field 51 is automatically created in the input setting device 5 by setting the shedding amount and the cross point in another window. It has become. However, in the present invention, the height position information is not automatically generated in such a way, but the height position information (opening position, cross point, etc.) for each weaving step is obtained separately, may be input and set by

(8) Regarding the amount of shedding for each weaving step, in the above description, the shedding amount is the same amount in all weaving steps, but if it is appropriate for weaving, it may not be the same in all weaving steps. . Further, when the opening amount is set in a separate window as in the above embodiment, the set value of the opening amount is set as a ratio (%) to the maximum opening amount with the maximum opening amount as the reference (100%). The size is not limited to the above-mentioned reference position, and may be set as a size (N mm) in the vertical direction centered on the reference position.

(9) Regarding the opening pattern, in the above-described embodiment, a flat weave opening pattern as shown in FIG. 2 is set. However, in the weaving method of the present invention, the shedding pattern is not limited to this, and may be a shedding pattern of another weave structure (twill weave, satin weave, etc.).

It should be noted that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention.

1 shedding device 2 heddle frame 21 drive motor 22 motion conversion mechanism 23 shedding side encoder 3 shedding control device 31 storage device 32 drive controller 4 main shaft 41 main shaft side encoder 50 pattern setting screen 51 setting display column 52 square frame 53 setting button 60 setting display screen

Claims (3)

A shedding device for imparting shedding motion to the warp threads by driving the corresponding heald frame with a dedicated drive motor provided for each heald frame, wherein the warp threads cross each other at a predetermined cross point. In a weaving method in a loom equipped with a shedding device in which each of the drive motors is controlled based on an operation pattern set for the frame,
At least some of the heddle frames are defined as target heald frames, and the movement pattern set for the target heald frames is height position information including the cross timing of the warp yarns and is information related to the cross points. Set as a different operation pattern, which is an operation pattern for one repeat of the weave pattern set by assigning height position information to each weaving cycle,
The different operating patterns include a first pattern comprising a first set weaving cycle that is a predetermined number of weaving cycles of three or more, and one or more weaving cycles set after the first pattern. and a second pattern consisting of a second set weaving cycle of
The first pattern is set to be the following (A) or the following (B),
A weaving method in a loom, wherein the second pattern is set so as to change the cross point toward the first cross point of the first set weaving cycle.
(A) The cross point of each weaving cycle in the first set weaving cycle is on one side in the vertical direction with respect to the cross point of the preceding weaving cycle.
(B) the cross-points in a plurality of weaving cycles less than the total number in the first set weaving cycle are on one side in the vertical direction with respect to the cross-points in the preceding weaving cycle, and the cross-points in the remaining weaving cycles The crosspoint will be the same as the crosspoint of the preceding weaving cycle. 2. The weaving method according to claim 1, wherein the cross timing is set at a point different from the beating point of the reed. the second set weaving cycle consists of three or more weaving cycles;
The weaving method according to any one of claims 1 to 3, wherein the second pattern is set as (C) or (D) below.
(C) the cross point of each weaving cycle in the second set weaving cycle is opposite to the one side with respect to the cross point of the preceding weaving cycle;
(D) the cross points in a plurality of weaving cycles less than the total number in the second set weaving cycle are opposite to the one side with respect to the cross points in the preceding weaving cycle, and the rest of the weaving cycles; is the same as the crosspoint of the preceding weaving cycle.
The weaving method according to claim 1 or 2, characterized in that:

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