CN113201836A - Weaving method of loom and shedding device for implementing the weaving method - Google Patents

Abstract

The present invention provides a method for weaving a fabric having a special feel in a loom equipped with a shedding device that independently drives a dedicated drive motor provided in each heald frame, and a shedding device for realizing the weaving method. When the shedding mode is a mode in which there is a dwell period during weaving in accordance with the shedding mode, an operation mode in which the driving mode consisting of the shedding mode and the driving method of the drive motor, which is repeated twice or more, is set for each heald frame. , and at least a part of the heald frame is set as the target heald frame, and the operation mode set for the target heald frame is set to include a first drive mode and a second drive mode, and the first drive mode determines the drive mode as a dwell period. The target heald frame is in the state of staying at the maximum opening position at the beating time during the beating period, and the second driving mode determines the driving method so that the target heald frame is in the set position at the beating-up time during the stay period, and drives each of them according to the operation mode. Heddle frame for weaving.

Description

Weaving method of loom and shedding device for implementing the weaving method

Technical Field

The present invention relates to a weaving method for a loom including a shedding device provided with a drive motor dedicated for each heald frame, and driving each drive motor independently in accordance with a shedding pattern preset in accordance with a weave structure of a fabric to be woven and a drive method of the drive motor corresponding to the shedding pattern, and to a shedding device for realizing the weaving method.

Background

In a weaving machine, a fabric having a desired weave structure is produced by driving each heald frame in accordance with a predetermined shedding pattern during weaving. Further, the shedding pattern is determined in the form of specifying whether the position (maximum shedding position) of each heald frame is an upper shedding position (highest rising position) or a lower shedding position (lowest falling position) in each weaving cycle.

When the weave of the fabric to be woven is a twill weave or a satin weave, the shedding pattern of each harness is determined so that the maximum shedding position is the same position in two or more consecutive weaving cycles. Therefore, in this case, each heald frame is driven so that each heald frame stays at the same maximum shedding position determined by the shedding pattern while crossing two or more consecutive weaving cycles. In the present application, the period during which each heald frame stays as described above is referred to as a stay period.

The opening pattern determined in this manner is a pattern in which the maximum opening position is specified in the weaving cycle unit as described above. On the other hand, the position of each heald frame is maintained at the maximum shedding position throughout the weaving cycle or not depending on the maximum shedding position specified for the weaving cycles before and after the heald frame. However, the position of each heald frame in each weaving cycle becomes the maximum shedding position specified by the shedding pattern at least at the middle time of the weaving cycle (the time when the rotation angle of the main shaft of the loom is 180 °).

However, as a shedding device of a loom, for example, there is a shedding device which is disclosed in patent document 1 and has a dedicated drive motor for each heald frame and which independently drives each heald frame. In a loom including such a shedding device, a setter or the like for the shedding device is configured to be able to arbitrarily set the shedding pattern, and a driving method (shedding curve) of a drive motor for operating the heald frame according to the shedding pattern is stored in the setter or the controller. In addition, the shedding device is configured to control the driving of each drive motor in accordance with a drive method of the drive motor selected based on a shedding pattern set for operating each heald frame in accordance with the shedding pattern.

In the shedding device of patent document 1, when weaving is performed based on the shedding pattern in which the heald frame stays in the stay period as described above, the drive motor is controlled so that the position of the heald frame to be stayed is closer to the closing position than the maximum shedding position by a predetermined amount. In weaving in which the drive motor is controlled in this manner, each heald frame stays at the closed position during the stay period.

Prior patent literature

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-84007

Disclosure of Invention

Problems to be solved by the invention

The present invention has an object to provide a method for producing a woven fabric having a special texture in a loom provided with shedding devices in which the heald frames are independently driven by a dedicated drive motor, and a shedding device for realizing the weaving method.

Means for solving the problems

The weaving method of a loom according to the present invention is a weaving method of a loom including a shedding device that includes a drive motor dedicated to each heald frame and drives each drive motor independently in accordance with a shedding pattern predetermined in accordance with a fabric structure of a fabric to be woven and a drive method of the drive motor corresponding to the shedding pattern, the shedding pattern being a pattern in which positions of the heald frames at respective intermediate times in a dwell period including the intermediate time in each weaving cycle in which two or more weaving cycles continue are set to be the same maximum shedding position, and is premised on the weaving method in the above case.

The weaving method of the loom according to the present invention is characterized in that an operation pattern for repeating a weave repeat amount of a drive pattern composed of a combination of a shedding pattern and a drive method twice or more is set for each heald frame, and the operation pattern set for the target heald frame is set to include a first drive pattern and a second drive pattern, in which the first drive pattern determines the drive method so that the target heald frame stays at a maximum shedding position at the beating-up time in the dwell period, and the second drive pattern determines the drive method so that the target heald frame stays at a set position on the side of the central ロ position within a range not exceeding the central position at the beating-up time in the dwell period, and each heald frame is driven in accordance with the operation pattern to perform weaving.

In the weaving method of the loom of the present invention, the distance between the set position and the middle ロ position may be 50% or less of the distance between the maximum shedding position and the middle ロ position.

In the weaving method of the loom according to the present invention, the second drive mode may include a second drive mode in which the drive method is determined as follows, with respect to the operation mode set for the target heald frame: the arrival time at which the warp yarn reaches the center position is earlier than that in the first drive mode due to the displacement of the target heald frame between the maximum shedding position in the stay period and the maximum shedding position in the weaving cycle continuous to the weaving cycle including the stay period.

The shedding device for a loom according to the present invention for realizing such a weaving method is premised on a shedding device for a loom including a drive motor dedicated for each heald frame and a controller for controlling the drive of the drive motor in accordance with a shedding pattern predetermined in accordance with a fabric structure of a fabric to be woven and a drive method of the drive motor corresponding to the shedding pattern.

The shedding device includes a setter capable of setting an operation pattern of one repeat of a weave pattern in which a drive pattern composed of a combination of a shedding pattern and a drive method is repeated twice or more for each heald frame, the setter being configured to be capable of selectively setting a first drive pattern and a second drive pattern as each drive pattern included in the operation pattern in a case where a position of each heald frame at each intermediate time in a dwell period including an intermediate time in each weaving cycle of two or more consecutive weaving cycles is set to a maximum shedding position which is the same, the first drive pattern determining the drive method so that the heald frame stays at the maximum shedding position at a beating-up time in the dwell period, and the second drive pattern determining the drive method so that the drive method is set to a set position on the ロ position side within a range not exceeding the central ロ position at the beating-up time in the dwell period In the on state, the controller controls the driving of the driving motor according to the operation mode.

In the opening device of the present invention, the setting unit may be configured to be able to set the setting position within a range in which a distance from the middle ロ position to the setting position is 50% or less of a distance from the middle ロ position to the maximum opening position.

In the opening device of the present invention, the setting unit may be configured to be able to set the operation mode to a second drive mode including a second drive mode in which the drive method is determined as follows: the arrival time of the warp yarn at the middle ロ position is earlier than that in the first drive mode due to the displacement of the heald frame between the maximum shedding position in the stay period and the maximum shedding position in the weaving cycle continuous to the weaving cycle including the stay period.

The effects of the invention are as follows.

According to the weaving method of the loom of the present invention, in the operation mode of one repetition of the weave pattern composed of the drive mode repeated twice or more for each heald frame, the operation mode set for the above-mentioned target heald frame is set to include the above-mentioned first drive mode and second drive mode, and the target heald frame is driven in accordance with the operation mode to weave in the above-mentioned form. In addition, according to such a weaving method, the tension of the warp yarn at the time of beating-up is different from the normal tension in the weaving portion woven by driving the heald frames in the second drive mode, and the surface of the fabric is raised compared to the weaving portion woven by driving the heald frames in the first drive mode. As a result, the entire fabric to be woven has a texture in which irregularities are formed on the surface thereof, and a fabric having a special texture can be obtained as compared with the case of weaving (weaving performed by driving the heald frame only in the first drive mode) by a general (normal) weaving method.

In the shedding device for a loom according to the present invention, the setter is configured to be able to selectively set the first drive mode and the second drive mode as the drive modes included in the operation mode in setting the operation mode in a case where the shedding mode in the drive modes is a mode in which a staying period of the heald frame occurs. In this way, by setting the operation mode including the first drive mode and the second drive mode, which is a drive mode for any heald frame repeated twice or more, a woven fabric having the above-described special hand can be obtained.

Further, if the operation mode set to include the second drive mode is the second drive mode including the determination of the drive method as follows: the surface state of the fabric at the woven part formed by the second drive mode can be made uniform when the arrival timing of the warp yarn at the middle ロ position is an earlier timing than the arrival timing in the first drive mode due to the displacement of the heald frame between the maximum shedding position in the stay period and the maximum shedding position in the weaving cycle continuous to the weaving cycle including the stay period.

Specifically, according to the present invention, in the weaving in the second drive mode, the tension of the warp yarn displaced by the target heald frame is lower than that in the weaving in the first drive mode at the beating-up time in the stay period, and the raised portion is formed on the surface of the fabric. However, depending on the type of yarn used for weaving and weaving conditions (set tension of warp yarn, etc.), the state of bulging of the fabric surface in the weaving portion may not be uniform over the entire weaving range in the second drive mode depending on the relationship with the tension state of warp yarn.

When the timing at which the warp yarn reaches the middle opening ロ position (the closed position) is earlier than the beat-up timing, the warp yarn is naturally displaced upward or downward from the middle ロ position at the beat-up timing, and therefore the tension of the warp yarn at the beat-up timing is higher than that in the case where the beat-up is performed with the warp yarn at the middle ロ position. Therefore, in the driving method in the second driving mode, the arrival time is set to be earlier than the same time (the arrival time is not particularly changed) as the driving method in the first driving mode which is a normal driving mode, and the tension of the warp yarn displaced by the heald frame to be driven at the beating-up time becomes higher than that in the case of not being changed.

When viewed in an open mode unit, the rising pattern of the raised portion formed by beating up at a low tension in the stay period is changed by changing the tension at beating-up times other than the stay period. Therefore, by determining the driving method in the second driving mode so that the tension at the beating-up time becomes an appropriate magnitude, that is, the arrival time becomes an appropriate time, the fabric surface state at the weaving portion formed by the second driving mode can be adjusted to an appropriate state. As a result thereof, the bulging state of the fabric surface at the weaving portion formed by the second drive mode can be made uniform over the entire weaving range.

Drawings

Fig. 1 is a block diagram showing an example of a shedding device of a loom according to the present invention.

Fig. 2 shows an example of a drive information setting screen displayed on the display.

Fig. 3 shows an example of an operation mode setting screen displayed on the display.

Fig. 4 is a partially enlarged view of a setting field on the operation mode setting screen.

Fig. 5 shows an example of another window for distributing drive system information to be displayed on the display.

Figure 6 is a diagram illustrating the displacement of a heald frame.

Description of the symbols

1-shedding device, 2-heald frame, 21-drive motor, 22-motion conversion mechanism, 23-opening side encoder, 3-shedding control device, 31-memory, 32-drive commander, 33-drive controller, 4-main shaft, 41-main shaft side encoder, 5-input setter, 6-drive information setting screen, 61, 62, 63, 64-input field, 65-switching button, 7-operation mode setting screen, 71-setting frame, 72-setting field, 73-setting button, 8-other window, 81-selection button.

Detailed Description

Fig. 1 shows an example of a shedding device 1 of a loom according to the present invention. The shedding device 1 includes a plurality of heald frames 2, a drive motor 21 provided for each heald frame 2, and a motion conversion mechanism 22 for connecting the heald frames 2 and the drive motor 21. The shedding device 1 is configured such that the rotation of the output shaft of each drive motor 21 is converted by a motion conversion mechanism 22 connected thereto, and the corresponding heald frame 2 is driven to reciprocate in the vertical direction. That is, in the shedding device 1, each heald frame 2 is independently driven by its own drive motor 21.

The shedding apparatus 1 further includes a shedding control device 3 that controls the driving of each drive motor 21. The opening control device 3 includes a memory 31, a drive commander 32 connected to the memory 31, and a drive controller 33 connected to the drive commander 32. The shedding device 1 further includes an opening-side encoder 23 provided for each drive motor 21 and detecting a rotation angle of an output shaft of the corresponding drive motor 21. The opening-side encoders 23 are connected to the opening control device 3 (drive controller 33).

In the shedding control device 3, information on the shedding pattern corresponding to the weave of the fabric to be woven and the driving method of the driving motor corresponding to the shedding pattern is stored in the memory 31. The shedding pattern sets the positions (top shedding position, bottom shedding position) of the heald frames 2 for each weaving cycle, and for example, the shedding pattern of 3/1 twill weave consisting of 4 weaving cycles per unit (one repeat) of weave is set in the form of "top, bottom". The term "shedding pattern" as used herein refers to a pattern set for each heald frame 2 and corresponds to one unit of weave.

The shedding pattern is a pattern in which the position of the heald frame 2 (hereinafter referred to as "frame position") is set in the weaving cycle unit in this manner. However, the actual frame position in the entire weaving cycle in each weaving cycle is not limited to the case where the heald frame 2 is maintained at the upper opening position (the highest elevation position) in the weaving cycle set to "up", for example, and includes a portion displaced toward the upper opening position and a portion displaced toward the lower opening position in the weaving cycle in accordance with the frame positions set for the front and rear weaving cycles. At least at an intermediate time in each weaving cycle (a time when the rotation angle (so-called crank angle) of the main shaft 4 of the loom is 180 °), the heald frame 2 is in a state of being located at the top end position or the bottom end position shown in the shedding mode. Therefore, when the same frame position is set for two or more consecutive weaving cycles in the open mode, the weaving cycle in which the heald frames 2 are at the same position at least at the intermediate time is continued by the set amount, and the period including the intermediate times at which the frame positions are the same corresponds to the "stay period" described in the present invention.

The driving method determines how the heald frame 2 corresponding to the shedding pattern operates. That is, in order to realize the state of the frame position set in each weaving cycle in the shedding mode as described above, this driving manner realizes the motion of the heald frame 2 during two consecutive weaving cycles. Therefore, in general, the drive method is a method for driving the heald frames 2 in a period (a period from the crank angle 180 ° of the previous weaving cycle to the crank angle 180 ° of the subsequent weaving cycle) which passes through two intermediate points of two consecutive weaving cycles. The driving method includes the timing when the heald frame 2 reaches the middle ロ position (the position where the warp yarn is in the closed state), the maximum shedding position, and the like.

The loom is further provided with an input setting device 5 for inputting setting weaving conditions and the like, and the input setting device 5 is further connected to the shedding control device 3 (memory 31). The information on the above-described opening pattern and driving method (hereinafter referred to as "driving method information") is input and set by the input setting device 5 and stored (set) in the memory 31. Therefore, the input setter 5 also functions as a part of the opening device 1. As the input setting device 5, for example, a touch panel type input setting device which includes a display and can input the above-described open mode or the like by operating a setting screen on the display is used.

The shedding control device 3 is configured such that a drive command corresponding to the drive method is output from the drive commander 32 to the drive controller 33, and the drive controller 33 controls the drive of the drive motor 21 in accordance with the drive command so that the heald frame 2 operates in accordance with the drive method corresponding to the frame position of the continuous weaving cycle based on the shedding pattern that has been set. The drive method is derived from the drive method information stored in the memory 31. A main shaft encoder 41 that is provided on the main shaft 4 of the loom and detects a crank angle is connected to the drive commander 32, and a crank angle signal corresponding to the detected crank angle is input. The drive command unit 32 is configured to output a drive command based on the crank angle signal. A rotation angle signal corresponding to the rotation angle of each drive motor 21 from the opening-side encoder 23 is input to the drive controller 33, and the drive controller 33 is configured to perform feedback control based on the rotation angle signal.

In the shedding control device 3 of the present embodiment, the drive commander 32 is configured to derive the drive method corresponding to the frame position in the weaving cycle set in the shedding pattern and the frame position in the next weaving cycle from the drive method information stored in the memory 31 at the time when the crank angle in each weaving cycle reaches a set angle (for example, 60 °) before 180 °, and to output the drive command corresponding to the derived drive method to the drive controller 33 at the time when the crank angle in the weaving cycle is 180 °. Further, the drive controller 33 controls the drive of the drive motor 21 in accordance with the drive command, thereby achieving the state of the frame position set in each weaving cycle in the open mode.

In the present embodiment, the opening control device 3 may be a device in which each component is formed of a loop circuit including circuit elements having each function, or a computer in which the functions of each component are programmed to operate as the opening control device 3.

In the loom including the shedding device 1 described above, the present invention is applied to the case where the shedding pattern is a pattern in which the same frame position is set for two or more consecutive weaving cycles, that is, the case where the set shedding pattern is a pattern in which the stay period described above exists during weaving according to the shedding pattern. The present embodiment is an example of a case where the opening pattern is the opening pattern of the 3/1 twill weave described above.

In addition, in the present embodiment, the input setter 5 (corresponding to the setter described in the present invention) is configured to be able to set an operation pattern in which the one-time repetition amount of the weave is repeated twice or more for each heald frame 2 in the drive pattern for driving the heald frame 2. The drive mode described in the present invention is a mode composed of a combination of an open mode and a drive method. In this drive method, a normal drive method in which the shedding pattern of the stay period is present is defined as a state in which the heald frame 2 stays at the maximum shedding position at the beating-up time in the stay period. In contrast, in the present invention, the drive method is also defined such that the heald frame 2 is positioned at the set position determined on the side of the middle ロ position within a range not exceeding the middle ロ position at the beating-up time in the stay period. Therefore, the above-described operation mode is set to a first drive mode including a normal drive mode and a second drive mode including a drive mode in which the heald frame 2 is positioned at the set position at the beating-up time in the stop period.

Hereinafter, an embodiment of the input setting device 5 of the present invention will be described in detail based on the drawings. The input setter 5 includes a display (display), and is configured to be able to read out the setting screen shown in fig. 2 and 3 on the display. The display is a touch panel type display as described above, and information can be input to the input field of the setting screen by a touch operation.

The setting screen shown in fig. 2 is a drive information setting screen 6 for setting a set value (hereinafter, referred to as "drive set value") associated with the drive of the heald frame 2 as the drive method information. The drive information setting screen 6 includes a plurality of setting items. The input setter 5 is configured to be able to input a drive setting value for each setting item. In the illustrated example, the setting items are a lock-out time (an up lock-out time, a down lock-out time), a cross timing, and a setting position in the second drive mode, and corresponding input fields 61, 62, 63, and 64 are displayed. The drive information setting screen 6 includes a switch button 65 for on/off setting of the switch ロ in addition to the setting items (input fields 61, 62, 63, and 64). That is, in the illustrated example, the drive system information is constituted by a combination of the above-described setting items and the on/off setting of the middle ロ. The input setter 5 is configured to be able to set eight sets (nos. 1 to 8) of such drive system information on the drive information setting screen 6 (eight drive setting values can be set for each setting item). The drive method information is divided into colors (blue, red, yellow, etc.) for each of the nos., and the colors are displayed together with the numbers of the nos. The setting items are as follows.

The upper and lower closing times are items for setting a set value relating to the displacement of the heald frame 2 with respect to the maximum opening position. Here, the drive setting value (input value) set here is a total value of the crank angle range and the same period (range) before and after the crank angle 180 ° which is an intermediate time in the weaving cycle.

The closing time is a period during which the heald frame 2 is generally maintained at the maximum shedding position in the weaving cycle, and the start point of the period corresponds to the timing at which the heald frame 2 reaches the maximum shedding position, and the end point corresponds to the timing at which the heald frame 2 starts to be displaced from the maximum shedding position. Further, as described above, since the present invention is premised on the weaving performed in accordance with the shedding pattern in which the dwell period exists, the start point of the period before the intermediate time derived from the drive setting value is the timing (start point of the dwell period) at which the heald frame 2 reaches the maximum shedding position, and the end point of the period after the intermediate time derived in the same manner is the timing (end point of the dwell period) at which the heald frame 2 starts to be displaced from the maximum shedding position.

Specifically, when the heald frame 2 is in the shedding mode at the top position during the stop period and the drive setting values of the top closing time and the bottom closing time are set to 100 ° as shown in the figure, the timing at which the heald frame 2 starts to be displaced from the bottom position is derived as the crank angle 230 ° (180 ° +100 °/2) based on the drive setting value of the bottom closing time), and the timing at which the heald frame 2 reaches the top position (the start point of the stop period) is derived as the crank angle 130 ° ((180 ° -100 °/2) based on the drive setting value of the top closing time. The timing at which the heald frame 2 starts to be displaced from the upper opening position (the end of the stay period) is derived as the crank angle 230 ° (-180 ° +100 °/2) based on the drive setting value of the upper closing time, and the timing at which the heald frame 2 reaches the lower opening position is derived as the crank angle 130 ° (-180 ° -100 °/2) based on the drive setting value of the lower closing time. In the weaving cycle in which the heald frame 2 reaches the lower end position, the heald frame 2 is maintained at the lower end position for a period set as a lower closing time.

The crossover timing is an item that sets the timing at which the heald frame 2 reaches the middle ロ position when the heald frame 2 is displaced from one maximum shedding position to the other maximum shedding position. The drive set value (input value) is a crank angle.

The set position is an item for setting the frame position at the beating-up time in the stop period when the heald frame 2 is operated in the drive mode of the second drive mode. The drive set value (input value) is set to a distance (unit: mm) from the reference position, which is the position of center ロ. Specifically, when the drive set value (input value) is set to 0(mm) as in the illustrated example, the set position is a position that matches the middle ロ position. The set position is a position to which the heald frame 2 located at the maximum shedding position is displaced at the beating-up time in the stay period. Therefore, as a driving method, a driving amount or the like related to the displacement is derived from the driving set value.

The switch button 65 for switching the on/off setting of the center ロ described above on the drive information setting screen 6 is a button for setting whether or not to execute the displacement of the heald frame 2 to the set position at the beating-up time in the stay period. The switch button 65 switches on/off setting by touch operation. When the on state is set, the drive method is a method of displacing the heald frame 2 to the set position at the beating-up time in the stay period. On the other hand, when the disconnection is set, the drive method is a method in which the displacement of the heald frame 2 at the beating-up time in the stop period is not executed (the heald frame 2 is maintained at the maximum shedding position) regardless of the drive set value at the set position.

The setting screen shown in fig. 3 is an operation mode setting screen 7 for setting a drive mode for driving the heald frames 2 for each heald frame 2. In the present embodiment, the setting is performed by assigning the above-described drive mode information to the opening pattern that has been set previously. Further, the drive method information is not the drive method itself described above, but each drive method in two consecutive weaving cycles is derived from the drive method information and the shedding pattern, and therefore the pattern to which the drive method information is assigned to the shedding pattern can be said to be a combination of the shedding pattern and the drive method, that is, the drive pattern described in the present invention.

The operation mode setting screen 7 includes a setting column 72 in which a setting frame 71 is arranged in a matrix like a setting screen of a known aperture mode (a partially enlarged view of the setting column 72 is shown in fig. 4). The input setter 5 is configured to be able to set frame positions (top port position, bottom port position) for each step in which one weaving cycle is one step for each heald frame 2. The illustrated example shows a setting example in the case of weaving with 12 heald frames 2, and shows a state in which shedding patterns from the 1 st (frame No.1) heald frame 2 to the 12 th (frame No.12) heald frame 2 are set. Fig. 3 shows the 1 st step to the 20 th step, but shows an example of a range that can be displayed on the display at one time, and this setting is performed by the number of steps equivalent to the number of repeated steps of the weave pattern at one time. In the present embodiment, the number of steps of the weave pattern repeat amount at one time is greater than the number of steps of the 20 steps, and in such a case, the operation mode setting screen 7 is in a scroll form on the display.

In this operation mode setting screen 7, by selecting the setting frame 71 in the setting field 72, the display state of the setting frame 71 is set to the color display state, and the frame position is set to the top opening position. Then, the setting frame 71 is not selected and the default state of the clear display is maintained, so that the frame position is set to the lower port position. In the present embodiment, the opening pattern is an opening pattern of 3/1 twill weave as described above, and therefore the setting state shown in the drawing is obtained. That is, the frame position of each heald frame 2 is set to the upper shed position (the display state of the setting frame 71 is a state of colored display) in three consecutive steps, and is set to the lower shed position (the display state of the setting frame 71 is a state of clear display) in the next step, and this operation is repeated. In each heald frame 2, the step of setting the drop position is shifted step by step in the order of the frame No. s.

In addition, the input setting device 5 is configured to assign the above-described drive method information to the thus-set shedding pattern on the operation mode setting screen 7. Specifically, the input setter 5 is configured to be able to specify an arbitrary range including a plurality of setting frames 71 on the setting field 72 in the operation mode setting screen 7. The operation mode setting screen 7 includes a setting button 73 for assigning driving method information to the set aperture mode, unlike the setting column 72 described above. The setting button 73 is a button for displaying another window 8 for assigning drive method information to the designated setting frame 71 on the display. The input setting device 5 is configured to be able to display another window 8 shown in fig. 5 by a touch operation of the setting button 73. The other window 8 includes a selection button 81 to which numbers 1 to 8 are assigned. The number of each selection button 81 corresponds to the No. of the drive system information shown in fig. 2, and the same color as shown in fig. 2 corresponding to the No. of the drive system information is displayed on the left side of each selection button 81. In addition, the input setter 5 is configured to assign the No. drive mode information corresponding to the selection button 81 to the setting frame 71 in the designated range by performing the touch operation of the selection button 81 on the other window 8 in the state where the range including the plurality of setting frames 71 is designated as described above.

In addition, in the present embodiment, the driving method information is distributed in units of aperture patterns each including 4 steps. That is, in the present embodiment, the same No. of drive system information is assigned to the plurality of setting frames 71 constituting the aperture pattern in each aperture pattern.

In the example shown in fig. 2, ロ in the drive system information of No.1 is set to off, and the drive system information is assigned to the open mode, so that the drive mode becomes the first drive mode described in the present invention. The ロ in the drive method information items of nos. 2 and 3 is set to on, and the drive method information items are assigned to the open mode, so that the drive mode becomes the second drive mode described in the present invention. The drive mode information of No.2 and the drive mode information of No.3 are set so that the drive setting values relating to the crossing timing are different.

Fig. 3 shows a state in which the first drive mode and the second drive mode are assigned to each heald frame 2 on the operation mode setting screen 7 (setting field 72). In the illustrated state, the second drive mode is set for the 1 st to 4 th heald frames 2 within the above-described range of 20 steps. The first drive mode is set for the 5 th to 12 th heald frames 2.

In the illustrated example, the driving mode (including the case where the type is different) including 4 steps is set by repeating the 20 th step five times. In the present embodiment, as the setting other than that shown in the drawing, the same drive mode as that in the 17 th to 20 th steps is set for each of the heald frames 2 in the 21 st to 24 th steps. In addition, in the present invention, the operation mode of the one-time repetition amount of the weave constituted by the plurality of driving modes is set, but in the present embodiment, the operation mode is set so as not to be completed in the above-described 24 steps but to be continued up to the subsequent steps. The operation mode is described in detail below.

As described above, until the 24 th step, the second drive mode is set for the 1 st to 4 th heald frames 2, and the first drive mode is set for the remaining heald frames 2. When the heald frames 2 are driven in the second drive mode, the warp yarns passing through the heald frames 2 are in a state of tension relaxation at the time of beating-up, compared with the warp yarns passing through the heald frames 2 driven in the first drive mode. Therefore, the amount of consumption of warp yarn (the amount of warp yarn drawn out from the warp beam) that is consumed in connection with weaving is a state in which the amount of consumption of warp yarn is different between the warp yarn passing through the heald frames 2 driven by the first drive mode and the warp yarn passing through the heald frames 2 driven by the second drive mode (in the case where the heald frames 2 are driven in accordance with the second drive mode, the amount of consumption of warp yarn is increased). Therefore, if weaving is performed only for some of the heald frames 2 in the operation mode in which the second drive mode is set, weaving cannot be continued due to the difference in the amount of consumption of the warp.

Therefore, the second drive mode other than that shown in the drawing is also set for the 5 th to 12 th heald frames 2 in which the first drive mode is set in the drawing. Specifically, for the 24 steps (25 th step to 48 th step) following the above-described 24 steps, the second drive mode is set for the 5 th to 8 th heald frames 2 and the first drive mode is set for the remaining heald frames 2, in the same manner as the settings up to the 24 th step for the 1 st to 4 th heald frames 2. Then, the same second drive mode as for the 9 th to 12 th heald frames 2 is set for the next 24 steps (49 th to 72 th steps), and the first drive mode is set for the remaining heald frames 2. Then, the operation mode is completed in these 72 steps. That is, in the present embodiment, the operation mode of one repetition of the weave is set to be constituted by 72 steps.

As described above, in the second drive mode included in the operation mode set for each heald frame 2, in the present embodiment, the drive mode information ロ for the second drive mode is set on the drive information setting screen 6 with a different content from nos. 2 and 3. On this basis, in the present embodiment, the second drive mode set in the first 12 steps among the second drive modes set in the 24 steps is the drive system information to which No.3 is assigned, and the second drive mode set in the second 12 steps is the drive system information to which No.2 is assigned. As described above, in the present embodiment, each operation mode is set to include two types of second drive modes as the second drive modes.

The operation modes of the heald frames 2 set in this manner are stored in the memory 31 of the shedding control device 3 in a form corresponding to the frame No. thereof.

In the loom including the shedding apparatus 1 described above, the shedding control device 3 controls the drive of each drive motor 21 so that the heald frame 2 operates in the operation pattern of the one-time repetition of the weave pattern set as described above. The drive control is performed as follows.

As described above, the drive commander 32 of the shedding control device 3 derives the drive method for each drive motor 21 (heald frame 2) based on the shedding pattern and the drive method information in the above-described operation pattern stored in the memory 31 at the time when the crank angle reaches the above-described set angle (60 °) in each weaving cycle. More specifically, the drive command unit 32 sequentially recognizes that the current weaving cycle is the first step of the operation pattern based on the crank angle signal output from the main shaft encoder 41. In addition, the drive commander 32 determines the timing at which the crank angle reaches the set angle based on the crank angle signal, and derives the drive method for each drive motor 21 (heald frame 2) in order from the drive motor corresponding to the first heald frame 2. The drive method of each drive motor 21 is derived based on the current weaving step (current step) grasped and the operation pattern associated with the frame No. of the heald frame 2 among the operation patterns stored in the memory 31.

Specifically, the drive commander 32 grasps the frame position set for the current step and the next step (next step) thereof, based on the operation pattern corresponding to the No. of the heald frame 2 driven by the drive motor 21, with respect to the drive motor 21 requiring the drive method. The drive commander 32 holds drive method information assigned to the current step and the next step. On the basis of the above-described grasped information, the driving method of the drive motor 21 is derived from the crank angle 180 ° of the current step toward the crank angle 180 ° of the next step.

The derived driving method is as follows for each of the frame position and the driving method information grasped as described above. When the frame positions set in the current step and the next step are different, the drive method is a method of displacing the heald frame 2 from the frame position (up/down) set in the current step to the frame position (down/up) set in the next step. In addition, the driving method is derived based on the upper lock time (lower lock time) and the cross timing in the driving method information assigned at the current step and the lower lock time (upper lock time) in the driving method information assigned at the next step when the frame position at the current step is the upper port position (lower port position).

More specifically, the driving method is based on (includes) the following three timings 1) to 3). 1) Is the timing at which the heald frame 2 starts to be displaced from the frame position of the current step derived as described above based on the up-lock time (down-lock time) in the drive manner information of the current step. 2) Is the timing at which the heald frame 2 passes the position ロ in the center due to the crossover timing in the drive manner information of the present step. 3) Is the timing at which the heald frame 2 reaches the frame position of the next step derived as described above based on the lower lock time (upper lock time) in the drive manner information of the next step.

When the frame positions set for the current step and the next step are the same position (the upper opening position), the driving method is a method for setting the stay period described above. On the basis, the driving mode is as follows: the on/off setting of ロ in the driving method information assigned at the current step is derived based on, and the on/off setting of ロ in the driving method information is derived based on the driving setting value at the set position in the case where the on/off setting is on.

More specifically, when the drive method information of the current step is set to the middle ロ cut-off as in No.1 in fig. 2, the drive method is a normal method of maintaining the heald frame 2 at the top end position.

On the other hand, when the drive method information of the current step is set to the middle ロ on state as in No.2 or No.3, the drive method is a method of displacing the heald frame 2 to a set position derived from the drive set value of the set position at the beating-up time. In this driving method, on the premise that the drive setting value of the set position is set to the distance of the ロ position among the distances as described above, the drive commander 32 is configured to be able to calculate the amount of movement (distance) of the heald frame 2 from the top end position to the set position. Therefore, the distance from the ロ position to the top opening position is stored in the memory 31 differently from the above-described drive mode information. In addition, the memory 31 also stores the timing at which the heald frame 2 starts to be displaced toward the set position during the stay, and the arrival timing at which the heald frame 2 arrives at the entry position due to the displacement of the heald frame 2 from the set position toward the entry position. In addition, the drive method includes the start timing and the arrival timing, and is derived from the movement amount from the start timing to the beat-up time (crank angle 0 °) and from the beat-up time to the arrival timing.

Then, the drive commander 32 starts outputting the drive command corresponding to the drive method of each drive motor 21 (heald frame 2) derived as described above to the drive controller 33 at the timing when it is determined from the crank angle signal that the crank angle has reached 180 °. The drive controller 33 controls the drive of each drive motor 21 in accordance with the drive command output from the drive command generator 32, thereby performing weaving.

Fig. 6 is a diagram showing how the heald frame 2 is displaced as a result of driving the drive motor 21 in accordance with the above-described drive methods. In fig. 6, (a) shows the displacement of the heald frame 2 in the case of driving the drive motor 21 in the drive method of the first drive mode to which the drive method information of No.1 is assigned, (b) shows the displacement of the heald frame in the case of the drive method of the second drive mode to which the drive method information of No.2 is assigned, and (c) shows the displacement of the heald frame in the case of the drive method of the second drive mode to which the drive method information of No.3 is assigned. (a) Details of each of (a) to (c) are as follows.

In (a) based on the drive type information of No.1, the drive set value of the lower lock time is 100 °, and thus the heald frame 2 is displaced from the upper mouth position toward the lower mouth position by 130 ° in crank angle to the lower mouth position. Furthermore, the heddle frame 2 reaching the lower mouth position at a crank angle of 130 ° is maintained in the lower mouth position during 100 ° and starts to be displaced again towards the upper mouth position at 230 °. Since the driving set value of the crossing timing is 350 ° and the driving set value of the upper lock time is 100 °, the displacement is performed such that the crank angle 350 ° passes through the middle ロ position and the crank angle 130 ° reaches the upper mouth position. Since the setting of center ロ is off, the heald frame 2 is maintained at the top port position during the period (stay period) from the crank angle of 130 ° to the crank angle of 230 ° after two weaving cycles, and starts to be displaced toward the bottom port position again by 230 ° thereof.

In addition, in the drive method information (b) based on No.2, since the drive setting values of the upper lock time, the lower lock time, and the intersection timing are the same as the drive method information (a) of No.1, the displacement from the upper port position to the lower port position and the displacement from the lower port position to the upper port position are performed in the same manner as (a). Since the setting of center ロ is on, the heald frame 2 is displaced so as to be positioned at the set position at each beating-up time in the stay period.

More specifically, as described above, since the drive set value of the set position in the drive system information of No.2 is 0(mm), the set position is a position that matches the middle ロ position. That is, the heald frame 2 is displaced so as to be located at the middle ロ position at the beating-up time (time of 0 ° crank angle) in the stay period. As described above, the memory 31 stores in advance the start timing of the displacement of the heald frame 2 toward the set position in the stay period and the arrival timing of the heald frame 2 from the set position to the top port position, and in the present embodiment, the start timing is 200 ° and the arrival timing is 160 °. The displacement of the heddle frame 2 during this dwell period therefore takes place in the following manner: after starting at the time when the crank angle reaches 200 ° and reaching the middle ロ position at crank angle 0 °, the upper mouth position is reached again at crank angle 160 °. In the shedding pattern of the 3/1 twill weave in the present embodiment, since beating-up occurs twice during the stop period, such displacement of the heald frame 2 is repeated twice during the stop period.

In addition, since the setting of ロ in (c) based on the drive system information of No.3 is on and the drive setting value of the set position is also the same as in (b) of No.2, the displacement of the heald frame 2 during the stay period is performed in the same manner as in (b) described above. The driving set values of the upper lock time and the lower lock time are also the same as the driving method information of No. 2. Here, since the drive setting value of the crossing timing is different from the drive manner information of No.2, in (c), the displacement of the heald frame 2 from the lower port position toward the upper ロ position and the displacement from the upper port position toward the lower ロ position are performed in such a manner that the crank angle 320 ° passes through the middle ロ position.

When the heald frames 2 are driven in the operation pattern based on the one-pass repeat of the weave pattern composed of the above-described 72 steps in fig. 3, for example, the 1 st to 4 th heald frames 2 are displaced in the manner of (c) in the 1 st to 12 th steps and in the manner of (b) in the 13 th to 24 th steps. In the following 25 th to 72 th steps, the heald frame 2 is displaced as in (a).

As described above, the modes (b) and (c) are the displacement modes (second displacement modes) according to the second drive mode, and the mode (a) is the displacement mode (first displacement mode) according to the first drive mode.

In addition, any displacement manner includes a displacement of the heald frame 2 from the lower shed position toward the upper ロ position and a displacement of the heald frame 2 from the upper shed position toward the lower ロ position, such that the heald frame 2 is located near the middle ロ position at the beat-up time. The second displacement method includes the following displacements of the heald frame 2: during a stop period in which the heddle frame 2 is maintained in the top position in the first displacement manner, the heddle frame 2 is in the set position (in this embodiment the central ロ position) at each beat-up time in the stop period. That is, the second displacement manner displaces the heddle frame 2 such that at each beat-up time in its weaving cycle the heddle frame 2 is located at or near the position of the middle ロ.

The tension of the warp yarn (warp yarn displaced by the heald frame) after passing through the heald frame 2 becomes lower when the heald frame 2 is at or near the center position than when the heald frame 2 is at the top position.

From the above, when the displacement mode of each heald frame 2 is observed for each step, the 1 st to 4 th heald frames 2 are displaced in the second displacement mode for the 1 st to 12 th steps and the 13 th to 24 th steps, while the 5 th to 12 th heald frames 2 are displaced in the first displacement mode. Therefore, in the 24 steps, in each weaving cycle (4 cycles) constituting the shedding pattern (driving pattern) of the 3/1 twill weave, the 5 th to 12 th heald frames 2 are located near the middle ロ position where the tension of the warp yarn is low at the two beating-up times, but are located at the upper shed position where the tension of the warp yarn becomes high at the two beating-up times therebetween. On the other hand, the 1 st to 4 th heald frames 2 are located in the vicinity of the middle ロ or middle ロ position where the tension of the warp becomes low at all the beating-up times.

In this way, in the 24 steps, after the warp yarns having passed through the 5 th to 12 th heald frames 2 are beaten up in a state where the tension thereof is low, beating up is performed twice in a state where the tension is high. That is, the portion woven by the warp yarns after passing through the 5 th to 12 th heald frames 2 becomes a weaving portion in the shedding pattern of the normal 3/1 twill weave. On the other hand, the warp yarns passing through the 1 st to 4 th heald frames 2 are beaten up with a low tension every time. Thus, the portion woven by the warp yarns passing through the 1 st to 4 th heald frames 2 is in a state where the surface of the fabric is raised compared to the normal woven portion. As a result, unevenness is formed in the fabric by the normal woven portion and the woven portion whose surface is raised.

As described above, the operation pattern of the one-time repetition of the weave of the present embodiment is constituted by 72 steps, and the heald frame 2 that is displaced by the second displacement system is switched for each 24 steps, so that the uneven portions are formed at different positions on the surface of the fabric woven in accordance with the operation pattern for each 24-step weaving range. As a result, the fabric woven in this manner has a special texture as compared with a fabric woven in an operation mode in which only the first drive mode is set, which is a normal weave.

As described above, the operation mode of the present embodiment includes two second drive modes in which the crossing timing is different. That is, the operation pattern includes a second drive pattern (B pattern) constituting the displacement system of (B) and a second drive pattern (C pattern) constituting the displacement system of (C).

On this basis, with respect to the cross timing, the C mode is set to a crank angle earlier than the B mode, and among the 24 steps of setting the second drive mode, the C mode is set for the first 12 steps, and the B mode is set for the second 12 steps. In addition, when viewed in each of 72 steps repeated once in a weave pattern, for example, regarding the 1 st to 4 th heald frames 2, the first drive mode is set for 48 steps consecutive to the last 12 steps, and there are 12 steps consecutive to the last 72 steps, in which the C mode in the second drive mode is set, in the first half. That is, the sequence is C mode (12 steps) → B mode (12 steps) → first drive mode (48 steps) → C mode (12 steps) → … ….

When the crossover timing is made different as described above, the position of the heald frame 2 with respect to the center ロ position differs at the beat-up time when the heald frame 2 is displaced from the lower edge position to the upper edge position or from the upper edge position to the lower ロ position. Also, the earlier the crossing timing, the greater the distance at the beat-up time with respect to the middle ロ position, and the higher the tension of the warp yarn at that time. Therefore, in the displacement system of each of the B-mode and the C-mode, the tension of the warp yarn at the beating-up time in the stay period is the same, but at the other beating-up times, the tension in the C-mode is slightly higher than that in the B-mode. Thus, the tension of the warp yarn in the entire drive pattern unit (4 cycles) is higher in the C-mode than in the B-mode.

As described above, the amount of consumption associated with the weaving of warp yarns after passing through the heald frame 2 when the heald frame 2 is displaced in the second displacement manner is larger than the amount of consumption when the heald frame 2 is displaced in the first displacement manner. Therefore, if some of the heald frames 2 continue to be displaced in the second displacement manner, the amount of consumption is greater than that of the warp yarns of the other heald frames 2, and the tension thereof increases. The warp yarn bulging state is achieved by reducing the tension as described above, but if the tension increases due to the consumption amount, the bulging state changes.

Therefore, in the step of displacing the heald frames 2 in the second displacement manner, the second drive mode of the latter half is set such that the tension of the warp yarn accompanying the displacement of the heald frames 2 is lower than that in the case of the C mode of the former half as in the above-described B mode, and the bulging state in the weaving range is uniform.

The present invention is not limited to the above-described one embodiment (the above-described example) of the opening device, but can be implemented in other embodiments (modifications) such as the following (1) to (8).

(1) In the above embodiment, the set position, which is the frame position at the time of beating-up in the stay period when the heald frame is operated in the drive method of the second drive mode, is set at the distance (unit: mm) from the reference position, with the middle ロ position being set as the reference position.

However, in the present invention, the set position is not limited to the position where the middle ロ position is set as the reference position, and may be a position where the maximum opening position is set as the reference position. The setting of the set position is not limited to the setting of the distance (unit: mm), and for example, the ratio of the distance from the ロ position or the maximum opening position to the maximum opening amount (distance from the ロ position to the maximum opening position) may be set in%, for example.

(2) In the above embodiment, the drive setting value associated with the set position is set to 0 (mm). That is, the set position is set to coincide with the middle ロ position.

However, in the present invention, the set position is not limited to the position corresponding to the position of center ロ, and may be a position closer to the center ロ position than the maximum opening position within a range not exceeding the position of center ロ. The set position is appropriately set within the above range according to the type of warp, the weaving conditions such as the set tension of the warp, and the state of the surface bulge required for the fabric. In addition, by setting the set position to a position closer to the position ロ than the position 50% of the maximum opening amount (the intermediate position between the maximum opening position and the position ロ), a fabric having a more preferable texture can be obtained.

(3) In the above-described embodiment, in addition to the drive set value of the set position that has been set, the control of displacing the heald frame toward the set position during the stay period is performed based on the start timing of starting the displacement from the kick-up position to the set position and the arrival timing from the set position toward the kick-up position, which are stored in advance in the memory.

However, in the present invention, the control is not limited to the case where the start timing and the arrival timing are set as the preset setting information, and the control may be performed based on the setting information as a displacement speed (driving speed of the driving motor) when the heald frame is displaced toward the set position. In this case, the drive command unit is configured to determine the start timing and the arrival timing based on the set position and the speed as the set position is set. The drive commander outputs a drive command corresponding to a drive method based on the set position, the speed, and the obtained start timing and arrival timing to the drive controller so as to perform the control based on the set position, the speed, and the obtained start timing and arrival timing.

(4) In the above-described embodiment, the second drive mode is set at 24 steps for every 4 of 12 heald frames, and as a result, the operation mode of one repetition of the weave pattern is constituted by 72 steps.

However, in the present invention, the number of heald frames for which the second drive mode is set in the same step and the number of steps for setting the second drive mode are not limited to those in the above-described embodiments, and are appropriately set according to the target fabric.

In addition, in the above embodiment, two types of second drive modes (the above-described B mode and C mode) having different drive setting values of the cross timing are included within the range of the step of setting the second drive mode.

However, depending on various conditions (such as the type of warp yarn, the weaving conditions such as the set tension of the warp yarn, and the number of steps of displacing the heald frame in the second displacement system), even when the heald frame is displaced in the second displacement system, the change in tension due to the above-described amount of consumption of the warp yarn may be small, and the change in tension may have a small influence on the bulging state of the surface of the fabric. Therefore, in this case, the second drive mode included in the operation mode may be only one. On the other hand, in the case of the various conditions described above in which the change in tension due to the consumption of the warp yarn has a large influence on the bulging state described above, it is preferable that the second drive mode included in the operation mode be three or more types of drive setting values different in the crossing timing.

(5) In the above-described embodiment, the information on the driving method (driving method information) is set to include settings (set position, on/off setting of the middle ロ) related to the closing time (upper closing time, lower closing time), the crossing timing, and the middle ロ operation as information that can be set in accordance with one of the opening patterns that are formed of a plurality of cycles related to the displacement to the upper opening position or the lower opening position.

However, in the present invention, the information set as the driving method combined with the shedding pattern is not limited to the information set in such a form. For example, in the case of the above-described embodiment, three types of information are set as the drive method information, but only one type of drive setting value is set for the lock-out time, and only two types of drive setting values are set for the cross timing, the middle ロ operation, and the drive setting value. Therefore, the above values may be set separately (individually set). In addition, when the shedding pattern and the driving method are combined, the values set individually in this manner may be assigned to the shedding pattern. In addition, in this case, it is preferable that the display mode of each setting frame on the setting screen is a combination of another display mode (for example, hatching) in addition to the colored display mode of the above-described embodiment. In the case of individual setting as described above, all the drive setting values are set to the same value (one type) as the drive setting values regarding the dwell time in the above-described embodiment, and basically, when the drive setting values are not changed during weaving in the loom, the drive setting values may be stored in advance in the memory as fixed values.

In the above embodiment, as described above, the drive method information includes information on the closing time, and the timing of starting the displacement and the timing of reaching the maximum shedding position of the heald frame, out of the displacement of the heald frame from one maximum shedding position (lower shedding position, upper shedding position) to the other maximum shedding position (upper shedding position, lower shedding position), are derived from the drive set value. However, the setting of the respective timings is not limited to setting the lock-up time as in the above-described embodiment, and the respective timings may be directly set as the drive setting values. In the above-described embodiment, the respective timings derived when the drive system information includes the information on the closing time are derived from the drive setting value of the closing time with reference to the crank angle 180 ° which is the intermediate time of the weaving cycle. However, the reference time when the above-described timings are obtained using the drive set value of the closing time is not limited to the intermediate time of the weaving cycle, and may be a time obtained based on the crossing timing. Specifically, for example, when the crossing timing is 350 ° in crank angle, the reference timing is 170 ° in crank angle, which is a timing 180 ° earlier than 350 ° in crank angle.

(6) In the above embodiment, the allocation of the drive manner information for the aperture mode is performed in the following manner: a range is designated in a setting field in an operation mode setting screen, and drive mode information is assigned to a setting frame in the designated range. In addition, in the above-described embodiment, the assignment is performed in aperture pattern units (in a form in which the same drive method information is assigned to a plurality of setting frames constituting the aperture pattern in each aperture pattern).

However, as described above, in the structure of the above embodiment, the specification of the range can be made within an arbitrary range. Therefore, the range to which the drive method information is assigned is not limited to the aperture pattern unit of the above-described embodiment, and may be a range in which the drive method information is switched in a step in the middle of any aperture pattern in the operation pattern. Specifically, in the case of the above-described embodiment, with respect to the 1 st to 4 th heald frames, the C mode of the second drive mode is set for the shedding patterns of three units (from the first step to the 12 th step) and the B mode of the second drive mode is set for the shedding patterns of three units (from the 13 th step to the 24 th step) that are consecutive to the first step. That is, the driving method of the second driving mode is set to switch between the 12 th step and the 13 th step. For example, it may be set such that the switching is performed between the 14 th step and the 15 th step. That is, in the open mode in which four steps of the 13 th step to the 16 th step constitute one unit, the C mode may be set for the 13 th and 14 th steps, and the B mode may be set for the 15 th and 16 th steps. In addition, when a plurality of pieces of drive mode information of the first drive mode are set, the drive mode of the first drive mode may be switched in a step in the middle of the opening mode in the same manner as described above.

In addition, as in the above-described embodiment, the distribution of the drive method information for the shedding pattern when the drive pattern is set in the shedding pattern unit is not limited to the designation of the range in the setting field in the operation pattern setting screen as described above, and for example, the number or the like may be set in which order the drive method information is repeated for each heald frame (several units in which the shedding pattern is repeated), or the drive method information may be distributed to the shedding pattern based on the setting.

(7) In the above-described embodiment, the drive mode is set by assigning the drive mode information to the previously set aperture mode, with respect to the drive mode constituted by the combination of the aperture mode and the drive mode.

However, in the present invention, the setting of the drive mode is not limited to the assignment of the drive mode information to the aperture modes on the setting field of the operation mode setting screen, and a plurality of drive modes per drive mode to which the drive mode information is assigned for one aperture mode may be prepared in advance and stored in the memory, and the drive mode may be assigned to the setting field in accordance with the operation mode of one repeat of the weave pattern. In addition, the setting of the setting field may be set not in units of the aperture pattern as described above, but may be set in units of steps (for each setting frame) in a manner of setting the aperture pattern by storing setting information of the combination frame position (the upper opening position, the lower opening position) and the step unit of the driving method in a memory so as to prepare a combination amount of the frame position and the driving method to be assumed in advance. In this case, the drive mode is configured by the setting information of the number of steps that becomes one unit of the aperture mode.

(8) In the above examples, the weaving using the weaving method of the present invention was described by taking as an example a case where the weave is a fabric having a weave pattern of 3/1 twill weave. However, the present invention can be applied to weaving in which weaving (reciprocating driving of a heald frame) is performed in an open pattern in which a frame position is maintained at the same position in two or more consecutive weaving cycles, as in the case of weaving fabrics such as other twill weaves (2/2 twill weaves, etc.) and satin weaves.

The present invention is not limited to the above-described embodiments, and can be modified as appropriate within a scope not departing from the gist thereof.

Claims (6)

1. A weaving method of a loom provided with an opening device,

the shedding device includes a drive motor dedicated for each heald frame, and independently drives the drive motors according to a shedding pattern preset according to a weave structure of a fabric to be woven and a driving method of the drive motor corresponding to the shedding pattern, wherein the weaving method is characterized in that the shedding pattern is a pattern in which positions of the heald frames at respective intermediate times in a stay period including the intermediate time in each weaving cycle of two or more consecutive weaving cycles are set to the same maximum shedding position,

an operation pattern is set for each heald frame, the operation pattern being a weave repeat of a drive pattern formed by a combination of the shedding pattern and the drive method repeated two or more times,

setting the operation modes set for at least a part of the heald frames as a target heald frame to include a first drive mode and a second drive mode, the first drive mode determining the drive mode such that the target heald frame stays at the maximum shedding position at the beating-up time in the stay period, the second drive mode determining the drive mode such that the target heald frame stays at a set position determined to be on the side of the position ロ within a range not exceeding the position ロ at the beating-up time in the stay period,

and driving each heald frame according to the operation mode to weave.

2. The weaving method of a loom according to claim 1,

the distance between the set position and the middle ロ position is 50% or less of the distance between the maximum opening position and the middle ロ position.

3. The weaving method of a weaving machine according to claim 1 or 2,

the operation mode set for the target heald frame includes, as the second drive mode, a second drive mode in which the drive method is determined as follows: the arrival time at which the warp yarn reaches the center ロ position due to the displacement of the target heddle frame between the maximum shedding position in the stay period and the maximum shedding position in the weaving cycle consecutive to the weaving cycle including the stay period is earlier than the arrival time in the first drive mode.

4. A shedding device for a loom, the shedding device including a drive motor dedicated for each heald frame and a controller for controlling the drive of the drive motor in accordance with a shedding pattern predetermined in accordance with a fabric structure of a fabric to be woven and a drive method of the drive motor corresponding to the shedding pattern, the shedding device being characterized in that,

the shedding device includes a setting device capable of setting an operation pattern for each heald frame, the operation pattern being a weave repeat amount of a drive pattern formed by a combination of the shedding pattern and the drive method, the drive pattern being repeated twice or more,

the setting device is configured to be able to selectively set a first drive mode and a second drive mode, the first drive mode being each of the drive modes included in the operation mode when the shedding mode is a mode in which the position of the heald frame at each of the intermediate times in a dwell period including an intermediate time in each of two or more consecutive weaving cycles is the same maximum shedding position, the first drive mode determining the drive mode such that the heald frame stays at the maximum shedding position at the beating-up time in the dwell period, the second drive mode determining the drive mode such that the heald frame stays at a set position on the side of the intermediate position within a range not exceeding the intermediate position at the beating-up time in the dwell period,

the controller controls driving of the drive motor according to the operation mode.

5. The shedding device of a weaving machine according to claim 4,

the setting device is configured to be capable of setting the set position within a range in which a distance from the set position to the position ロ is 50% or less of a distance from the maximum opening position to the position of the middle opening.

6. Opening device of a weaving machine according to claim 4 or 5,

the setting unit is configured to be able to set the operation mode to a second drive mode in which the drive method is determined as follows as the second drive mode: the arrival time at which the warp yarn reaches the middle ロ position due to the displacement of the heald frame between the maximum shedding position in the stay period and the maximum shedding position in the weaving cycle consecutive to the weaving cycle including the stay period is earlier than the arrival time in the first drive mode.

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