JP6635006B2 - Shedding method and shedding device in loom - Google Patents

Description

  The present invention relates to a shedding method and a shedding device for a loom, and more particularly, to a shed frame driving system in which a single heald frame is independently driven via a crank mechanism by a unidirectional rotation of a single shedding motor. The present invention relates to an opening method and an opening device in a loom.

  A heddle for operating the opening / closing opening while guiding the warp yarns for weaving the woven fabric is attached to the heald frame, and a group of the warp yarns moving in the same direction during one weft insertion cycle is each heald of one heald frame. Through the thread insertion hole. Such heald frames are arranged in the front-rear direction of the plurality of looms, and each heald frame is individually moved up and down.

Since the plain weave is woven in a state in which the warp and the weft are alternately crossed, the plurality of heald frames are driven so as to alternately move between the top dead center and the bottom dead center.
On the other hand, in twill weave and satin weave, some of the heald frames are not driven so as to move alternately between the top dead center and the bottom dead center. The other heald frame is driven so as to reciprocate in a state where is stopped in the open state.

  When the adjacent heald frames are driven to move alternately up and down, the tension applied to the warp by the heald has little difference between the warps. However, in the case of twill weave or satin weave, the tension applied to the warp by the heald of the heald frame (stop frame) that is parked in the open state among the plurality of heald frames and the heald of the moving heald frame (operation frame) The difference from the tension applied to the warp increases.

  Conventionally, a warp is supplied through a roller that moves back and forth in synchronization with a periodic fluctuation of the warp tension during one rotation of the loom by the periodic swing of the easing lever, and the periodic fluctuation of the warp tension during one rotation of the loom is controlled. There is a device that absorbs the vibration of the roller. If the tension difference between the stationary frame and the operation frame is large, the slack of the warp corresponding to the operation frame increases. In particular, when some heald frames are parked in the open state during weaving, such as twill weave and satin weave, the imbalance in the vertical direction of the tension applied to the warp is large depending on the ratio of the number of the stay frames to the number of the operation frames. Become. The easing amount for reducing the difference in tension between the opening and closing (crossing) of the warp is a small easing amount because it is set in accordance with a large number of dominant stationary frames. However, when the easing amount is small, the warp of the operation frame is loosened at the time of closing, and in particular, in the case of an air jet loom, it becomes a cause of a weft boring error in which the weft is deviated from the warp opening and inserted.

  In addition, in the case of a woven fabric having a large upper and lower unbalance in the number ratio of the number of stationary frames, if there are many upper stationary frames, the cloth front (cloth portion) is pulled upward and the lower stationary frame is stopped at the lower dead center side. If there are many stop frames, the cloth fell (cloth part) is pulled downward. When the weaving (cloth portion) moves up and down, it adversely affects the weft insertion property and the fabric quality (weaving step).

  In the case of weaving high-tensile woven fabrics such as denim, if the number of staples is too large for the woven fabric just below the high-tension limit, the tension cannot be increased further. The tension is viewed as an average of the entire warp, and if there are many stationary frames, abnormalities in high tension are likely to occur.

  Patent Document 1 proposes a heald drive device that continuously swings a heald frame while the frame is stationary.

JP 2005-89954 A

  In the heald driving device of Patent Document 1, when the heald frame is stopped in the open state, the heald frame is swung without stopping, so that the occurrence of the weft threading mistake, the adverse effect on the weft insertion property and the quality of the fabric, and the stopping are obtained. It is possible to solve the three problems that abnormalities in high tension are likely to occur when there are many frames. However, in the heald driving device disclosed in Patent Document 1, since the heald frame is swung, the driving load is large.

  The present invention has been made in view of the above-described problem, and has as its object to provide an operation frame even when some heald frames are stopped in an open state during weaving, such as twill weave and satin weave. It is an object of the present invention to provide an opening method and an opening apparatus in a loom which can suppress an increase in a motor load and a decrease in a quality of a woven fabric due to a difference in warp tension between the sewing machine and a stop frame.

  An opening method in a loom that solves the above-mentioned problem is an opening method in a loom having a plurality of heald frame drive systems in which a single heald frame is independently driven via a crank mechanism by a unidirectional rotation of a single opening motor. is there. When stopping the heald frame in the open state, the heald frame is stopped after closing the mouth by a set amount from the top dead center or the bottom dead center, and after stopping, the rotation direction of the opening motor is the same as before stopping. Invert and resume the opening movement.

  According to this configuration, each heald frame performs the opening motion by one-way rotation of the corresponding opening motor. In the present invention, "performing the opening movement by one-way rotation of the opening motor" means that the opening motor is reciprocated (for example, forward rotation when raising the heald frame, reverse rotation when lowering the heald frame). It does not cause an opening movement. Further, in the present invention, “close the mouth” refers to moving the heald frame in the closing direction from the top dead center or the bottom dead center. When the heald frame stops in the open state, the heald frame does not stop at the top dead center or the bottom dead center, but opens so that the heald frame stops after closing the mouth by a set amount from the top dead center or the bottom dead center. The motor is driven. Therefore, compared to the case where some heald frames are stopped at the top dead center or the bottom dead center corresponding to the weave pattern and the other heald frames move, the warp and operation frame corresponding to the stationary frame are supported. The difference in tension between the warp and the warp is reduced. Therefore, even when some heald frames are stopped in an open state during weaving, such as twill weave and satin weave, the motor load increases and the quality of the fabric increases due to the difference in the warp tension between the operation frame and the stop frame. The decrease can be suppressed. In addition, after stopping, the opening motor is rotated in the opposite direction to the one before the stop to restart the opening movement, so it is necessary for stable weft insertion despite closing the mouth from the top dead center or the bottom dead center while stopping. The opening amount at the time of weft insertion can be secured.

  The set amount can be variably set for each heald frame. The opening amount of the warp due to the stop frame differs depending on the stop position of the stop frame, and the optimum value of the opening amount of the warp differs depending on the thickness of the warp used, the type of fiber, the woven pattern or the weaving speed. Therefore, if the set amount can be variably set for each heald frame, the heald frame can be stopped at an appropriate stop position in accordance with the weaving conditions.

  The heald frame stopped in the open state moves with the same opening curve as the other heald frames until the heald frame stops after closing the mouth from the top dead center or the bottom dead center. The change in the moving speed of the heald frame from the top dead center or the bottom dead center to the stop after closing the mouth may be different from other heald frames. However, in the case where the opening curves are made the same, the warp yarns that are opened and moved by the adjacent heald frames make the same movement, so that the warp handling becomes better. Further, since there is no need to store data of the special opening curve for the stop in the control means, the memory capacity can be reduced.

  An opening device in a loom that solves the above problems is an opening device in a loom having a plurality of heald frame drive systems in which a single heald frame is independently driven via a crank mechanism by a unidirectional rotation of a single opening motor. is there. And a control means for controlling the opening motor so that the heald frame moves in accordance with the opening curve. The control means controls the opening motor to rotate in one direction during the movement of the heald frame, and when the heald frame is stopped in the open state, the heald frame is moved from the top dead center or the bottom dead center. After the mouth is closed by the set amount, the opening motor is stopped, and after the stop, the opening motor is controlled so that the rotation direction of the opening motor is reversed from that before stopping and the opening motion of the heald frame is restarted.

  An opening device according to the present invention corresponds to a stationary frame, compared to an opening device in which another heald frame moves in a state where some heald frames are stopped at a top dead center or a bottom dead center corresponding to a weave pattern. The difference in tension between the warp and the warp corresponding to the operation frame is reduced. Therefore, even when some heald frames are held at the stopping position during weaving, such as twill weaving and satin weaving, the motor load increases and the quality of the fabric increases due to the difference in the warp tension between the operating frame and the stopping frame. The decrease can be suppressed. In addition, after the stop, the opening direction of the opening motor is reversed from that before the stop to resume the opening movement. Can be secured.

  According to the present invention, even when some heald frames are stopped in an open state during weaving, such as twill weave and satin weave, an increase in motor load due to a difference in warp tension between the operation frame and the stop frame can be prevented. A decrease in the quality of the woven fabric can be suppressed.

FIG. 2 is a partially omitted front view showing the opening device according to the first embodiment. FIG. The sectional view on the AA line of FIG. (A), (b), (c) is a front view showing an opening lever. 9 is a flowchart illustrating an operation control program of the opening motor. (A)-(k) is a schematic diagram which shows the opening curve of the heald frame in satin weave (woven pattern 4/1). (A) is a schematic diagram showing a change pattern of a mouth closing amount from a top dead center, and (b) is a schematic diagram showing a change pattern of a mouth closing amount from a bottom dead center. FIG. 9 is a schematic diagram showing a change in a moving direction of a heald frame in Patent Document 1. FIG. 9 is a schematic diagram illustrating a change pattern of a mouth closing amount according to another embodiment. The front view showing the crank mechanism of another embodiment.

An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, opening levers 13, 14 are swingably supported by support shafts 15A, 15B inside left and right side frames 11, 12 of the loom. The swing of the opening lever 13 is transmitted to the opening lever 14 via the transmission rod 16, and the opening levers 13 and 14 swing in synchronization. Connecting rods 17, 18 are attached to the opening levers 13, 14 in an upright state. A plurality of heald frames 19 (16 in the present embodiment) are supported by a pair of connecting rods 17, 18, respectively. The swing of the opening levers 13 and 14 is converted into vertical movement of the heald frame 19 via the connecting rods 17 and 18.

  As shown in FIGS. 1 to 3, a plurality of opening motors 20 </ b> A, 20 </ b> B, 20 </ b> C, 20 </ b> D, 20 </ b> E, and 20 </ b> F are arranged on one side frame 11. Since the opening motors 20A, 20B, 20C, 20D, 20E, and 20F have the same configuration, only the configuration related to the opening motor 20D will be described below.

  As shown in FIG. 2, the opening motor 20D includes a servomotor 201, a rotary encoder 202 provided at one end of a shaft (not shown) of the servomotor 201, and a reduction gear group ( (Not shown). Further, the opening motor 20D includes a rotating shaft 204 connected to a reduction gear group.

  As shown in FIG. 3, one end of a crank arm 21 is fixed to the rotating shaft 204, and one end of a rod-shaped connecting member 22 is rotatably connected to the other end of the crank arm 21 via a crank pin 23. Have been. The rotating shaft 204, the crank arm 21, and the connecting member 22 constitute a crank mechanism.

As shown in FIGS. 4A, 4B, and 4C, the opening lever 13 includes three types of opening levers 131, 132, and 133.
The opening lever 131 shown in FIG. 4A includes a connection arm 241 extending upward, a lateral arm 25 connected to the connecting rod 17, and a lower arm 26 connected to the transmission rod 16. The connecting rod 17 is connected to the lateral arm 25 via a shaft pin 27, and the transmission rod 16 is connected to the lower arm 26 via a shaft pin 28.

  The connecting member 22 is connected to the connecting arm 241 via an adapter 29 as an attachment position adjusting unit. The adapter 29 is screwed to the connection arm 241 with a screw 30, and the screwing position (attachment position) of the adapter 29 to the connection arm 241 can be changed in the length direction of the connection arm 241. The connecting member 22 is connected to the adapter 29 via a connecting pin 31.

  The opening lever 132 shown in FIG. 4 (b) and the opening lever 133 shown in FIG. 4 (c) have a lateral arm 25 having the same shape and size as the lateral arm 25 and the lower arm 26 of the opening lever 131, respectively. And a downward arm 26. The opening levers 132 and 133 include connection arms 242 and 243 that extend upward similarly to the opening lever 131. The connection arms 242 and 243 have an angular interval in the circumferential direction of the support shaft 15A with respect to the lateral arm 25. Each is different.

  The opening motor 20D, the rotating shaft 204, the crank arm 21, the connecting member 22, the opening levers 13 and 14, the transmission rod 16, and the connecting rods 17 and 18 are connected to the single heald frame 19 by one rotation of the single opening motor 20D. Constitute a heald frame drive system independently driven via a crank mechanism. Note that "by one-way rotation of the opening motor 20D" means that the shedding motion of the heald frame 19 is caused by the reciprocating rotation of the opening motor 20D (for example, forward rotation when raising the heald frame 19, reverse rotation when lowering the heald frame 19). It does not mean to let you.

  As shown in FIG. 1, eight shedding motors 20A, 20B, and 20C are provided corresponding to eight heald frames 19 counted from the front of the loom. In the present embodiment, the opening motor 20A is provided on the side of the side frame 11 in a three-tiered manner, and three of the motors arranged on the outer side of the opening motor 20B are provided on the side of the side frame 11 and three are provided from the bottom. The opening motor is 20C.

  As shown in FIG. 2, opening motors 20D, 20E, and 20F are arranged so as to form a pair with opening motors 20A, 20B, and 20C. The connecting member 22 and the opening lever 13 shown in FIG. 1 are a heald frame drive system corresponding to the three heald frames 19 arranged on the front row side of the loom. The connection members connected to the opening motors 20B and 20C are not shown for easy viewing.

  The connecting members 22 connected to the rotating shafts 204 of the plurality of opening motors 20A are all set to the same length. The connecting members (not shown) connected to the rotating shafts 204 of the plurality of opening motors 20B are all set to the same length, and the connecting members (not shown) connected to the rotating shafts 204 of the plurality of opening motors 20C. ) Are set to the same length. The length of the connecting member connected to the rotating shaft 204 of the opening motors 20D, 20E, 20F is set to the same length as the connecting member 22 connected to the opening motors 20A, 20B, 20C, respectively. That is, as the connecting member 22 connected to the rotating shaft 204, only three types having different lengths are prepared.

  4A, 4B, and 4C, the connecting arms 241, 242, and 243 of the opening levers 131, 132, and 133 are connected to the center 151 of the support shaft 15A (the swing center of the opening levers 131, 132, and 133). ) In the direction (circumferential direction). Therefore, despite the fact that only three types of connecting members 22 are prepared, the opening motors 20A, 20B, 20C, 20D, 20E, and 20F are arranged laterally in two rows and vertically in multiple stages. Can be arranged. As a result, an increase in the installation space in the horizontal direction of the loom can be prevented.

  As shown in FIG. 1, the opening motors 20A, 20B, and 20C are controlled by the control unit 32. Although not shown in FIG. 1, the opening motors 20D, 20E, and 20F are also controlled by the control unit 32. The control means 32 executes a variety of arithmetic processing, a ROM in which programs and data necessary for the control are stored, a RAM in which the calculation results of the CPU are temporarily stored, and inputs and outputs signals to and from the outside. Input / output ports and the like. An input setting means 33, an operation command switch 34, a start switch 35, and a rotary encoder 202 are connected to the control means 32 by signals.

  The control means 32 includes, as a control program for driving the opening motors 20A to 20F, a method of rotating the opening motors 20A to 20F in one direction during the movement of the heald frame 19 and stopping the heald frame 19 in the open state. A control program for driving the heald frame 19 to stop after closing the mouth by a set amount from the top dead center or the bottom dead center is stored. Further, when restarting the shedding motion of the heald frame 19, a control program is stored for reversing and driving the shedding motors 20A to 20F in the direction opposite to the rotation direction before stopping.

  6 (a) to 6 (k) show reference opening curves when the control means 32 controls the opening motor 20A and the like when weaving a satin fabric having a woven pattern of 4/1. This opening curve is stored in the control means 32. 6A to 6K, the horizontal axis represents the loom rotation angle, and the vertical axis represents the height position of the heald frame.

  The opening curve is set so that the heald frame 19 that stops in the open state moves at the same change in the moving speed as the other heald frames until it stops after passing through the top dead center X. That is, the opening curve XA shown in FIG. 6D is the same as the opening curve XB shown in FIG. In this embodiment, the opening curve C-X in which the heald frame 19 moves from the point C shown in FIG. 6A to the top dead center X, and the heald frame 19 stops at the point A past the top dead center X. The aperture curve XA shown in FIG. 6D is set symmetrically.

  The set amount L (the amount by which the heald frame 19 is lowered from the top dead center X to the stop position A) can be variably set for each heald frame 19. The opening amount of the warp by the heald frame 19 varies depending on the stop position of the heald frame 19, and the optimal amount of the opening amount of the warp varies depending on the thickness of the warp used, the type of fiber, the woven pattern or the weaving speed. Therefore, the set amount L can be variably set for each heald frame 19 so that the heald frame 19 can be stopped at an appropriate stop position according to the weaving conditions.

  As shown in FIGS. 7A and 7B, the change patterns of the mouth closing amount include change patterns L1, L2, L3 indicating the mouth closing amount from the top dead center X, and the change pattern from the bottom dead center Y. There are change patterns L4, L5, L6 indicating the amount of closing the mouth. The change pattern includes a reference pattern indicated by a solid line, and a pattern indicated by a broken line in which the stop position is above or below the reference pattern. The memory of the control means 32 does not store the curves of all the change patterns, but stores the reference pattern in the memory. The control means 32 performs data processing by multiplying the reference pattern by a predetermined coefficient. Thus, various change patterns are calculated and an appropriate change pattern is used.

Hereinafter, the control in the case where the heald frame 19 starts moving and performs the opening motion from the state where the heald frame 19 is stopped at the top dead center X side will be described based on the flowchart of FIG. 5 and FIGS. 6A to 6K. I do.
The control means 32 starts the forward rotation driving of the opening motor 20A from the point C in FIG. 6A (step S1), and calculates the height position of the heald frame 19 based on the output signal of the rotary encoder 202 in step S2. I do. Next, the control means 32 determines whether or not the heald frame 19 has reached the reversal position (in this case, top dead center X) in step S3, and returns NO to step S2 if NO, and returns to step S4 if YES. Proceed to. The control means 32 determines whether or not to stop the heald frame 19 in step S4 based on the stored opening curve. If NO, the process returns to step S2. In this embodiment, the stop of the heald frame 19 is not performed in the opening curves shown in FIGS. 6B and 6C, so that the opening motor 20A continues the normal rotation. The moving state of the heald frame 19 during this time is shown in FIGS. That is, even if the heald frame 19 reaches the top dead center X, the forward rotation driving is continued even after the heald frame 19 reaches the bottom dead center Y as shown in FIG. In the state where normal rotation is continued, as shown in FIG. 6 (c), it moves from bottom dead center Y to top dead center X.

  The control means 32 proceeds to step S5 when the heald frame 19 is stopped at the top dead center X side as shown in FIG. 6D, that is, when YES is obtained in step S4, and at a predetermined deceleration in step S5. The opening motor 20A is stopped (point A in FIG. 6D). At this time, the deceleration of the opening motor 20A is set so that the stopped heald frame 19 moves with the same opening curve as the other heald frames 19, and the heald frame 19 is lowered from the top dead center X by the set amount L. Stopped in position. The moving state of the heald frame 19 during this time is shown in FIG.

  Next, the control means 32 proceeds to step S6, determines whether or not to release the stationary state and restart the opening movement based on the stored opening curve. If the opening movement is restarted, the processing proceeds to step S7. After starting the reverse rotation drive of the opening motor 20A in step S7 (point D in FIG. 6F), the control means 32 proceeds to step S8. The control means 32 calculates the height position of the heald frame 19 based on the output signal of the rotary encoder 202 in step S8. Next, the control means 32 determines whether or not the heald frame 19 has reached the reversal position (top dead center X) in step S9. If NO, the process returns to step S8, and if YES, the process proceeds to step S10. The control means 32 determines whether or not to stop the heald frame 19 in step S10 based on the stored opening curve. If NO, the process returns to step S8. In this embodiment, the stop of the heald frame 19 is not performed in the opening curves shown in FIGS. 6G and 6H, and the opening motor 20A continues to rotate in the reverse direction. The movement state of the heald frame 19 during this time is shown by (f) to (h) in FIG. That is, even if the heald frame 19 reaches the top dead center X, the reverse rotation drive of the opening motor 20A is continued. Then, even after the heald frame 19 reaches the top dead center X as shown in FIGS. 6F and 6G, the reverse rotation is continued while the heald frame 19 reaches the top dead center X as shown in FIG. From the bottom dead center Y to the top dead center X as shown in FIG.

  If YES in step S10, the control means 32 proceeds to step S11, and stops the opening motor 20A at a predetermined deceleration in step S11. At this time, the deceleration of the opening motor 20A is set so that the stopped heald frame 19 moves with the same opening curve as the other heald frames 19, and the heald frame 19 is lowered from the top dead center X by the set amount L. Stopped in position. The state of movement of the heald frame 19 during this time is shown in FIG.

  Next, the control means 32 proceeds to step S12, determines whether or not to release the stationary state and restart the opening movement based on the stored opening curve. If the opening movement is restarted, the control means 32 proceeds to step S1. The normal rotation drive of the motor 20A is started. The movement state of the heald frame 19 during this time is shown by (i), (j), and (k) in FIG. FIG. 6 (k) is the same as FIG. 6 (a).

  After the heald frame 19 reaches the top dead center X or the bottom dead center Y, the control means 32 adjusts the set amount L, which is the amount of movement in the mouth closing direction, for each heald frame 19 in accordance with the weaving conditions. To a new stop position. When the heald frame 19 is parked at the top dead center X side, the control means 32 uses the change pattern L1, L2, L3 of the closing amount shown in FIG. The set amount L is adjusted so as to be in an optimum state according to the thickness, the type of fiber, the woven pattern or the weaving speed. Accordingly, the heald frame 19 serving as a stop frame stops at an appropriate stop position in which the opening state of the warp corresponds to the weaving conditions such as the thickness of the warp used, the type of fiber, the weaving pattern or the weaving speed.

  When the stop position of the heald frame 19 is not on the top dead center X side but on the bottom dead center Y side, the heald frame 19 starts moving from the stop position on the bottom dead center Y side, and the bottom dead center Y and the top dead center X And after reaching the bottom dead center Y, closing the mouth by the set amount L and then stopping at a position elevated from the bottom dead center Y by the set amount L Is stopped. In this case, the control means 32 uses the change patterns L4, L5, and L6 of the closing amount shown in FIG. 7B to determine the thickness of the warp, the type of fiber used, the weaving pattern or the weaving speed depending on the opening state of the warp. The set amount is adjusted so as to obtain the optimum state.

  That is, in this embodiment, during operation of the loom, the heald frame 19 that stops corresponding to the weave pattern does not stop at the top dead center X or the bottom dead center Y, but stops at the top dead center X side. In this case, as shown in FIG. 6D, after stopping at the position where the mouth is closed from the top dead center X by the set amount L, the rotation direction of the opening motor 20A is reversed from that before the stop, and the opening motion is restarted. You.

  On the other hand, in the heald driving device described in Patent Document 1, when the heald frame is stopped at the opening position on the top dead center side, the drive motor is continuously driven to move the heald frame to the top dead center as shown in FIG. Swing in the vicinity. Therefore, in the heald driving device disclosed in Patent Document 1, the heald frame is swung in the stop range, so that the driving load is large.

  When the stop position on the top dead center X side or the bottom dead center Y side is changed, the forward rotation and the reverse rotation of the opening motor 20A and the like are repeated and the forward / reverse rotation operation amount is changed to change the top dead center side or the top dead center. It is also possible to change the stop position on the bottom dead center side. However, in the case of plain weaving, that is, when the heald frame 19 performs a continuous operation without intermittent stop, the load of the opening motor 20A and the like becomes too large.

  In the present embodiment, when the heald frame 19 is opened, the opening motor 20A and the like are driven and controlled to rotate in one direction, so that the load on the opening motor 20A and the like is prevented from becoming too large.

According to this embodiment, the following effects can be obtained.
(1) The shedding method is a shedding method in a loom having a plurality of heald frame drive systems in which a single heald frame 19 is independently driven via a crank mechanism by one-way rotation of a single shedding motor 20A or the like. . When the heald frame 19 is stopped in the open state, the heald frame 19 is stopped after closing the mouth by a set amount from the top dead center or the bottom dead center Y. And the opening motion is resumed.

  Therefore, compared with the case where another heald frame 19 moves in a state where some heald frames 19 are stopped at the top dead center X or the bottom dead center Y corresponding to the weave pattern, the warp corresponding to the stationary frame is The difference in tension from the warp corresponding to the operation frame is reduced. Therefore, even when some heald frames 19 are stopped in an open state during weaving, such as twill weave and satin weave, an increase in motor load and a woven fabric quality caused by a difference in the warp tension between the operation frame and the stay frame. Can be suppressed. Further, after the stop, the rotation direction of the opening motor 20A and the like is reversed from that before the stop, and the opening movement is restarted. Therefore, even though the mouth is closed from the top dead center X or the bottom dead center Y during the stop, a stable operation is achieved. It is possible to secure an opening amount for weft insertion necessary for weft insertion.

  (2) The set amount can be variably set for each heald frame 19. The opening amount of the warp due to the stop frame differs depending on the stop position of the stop frame, and the optimum value of the opening amount of the warp differs depending on the thickness of the warp used, the type of fiber, the woven pattern or the weaving speed. Therefore, if the set amount can be variably set for each heald frame 19, the heald frame 19 can be stopped at an appropriate stop position in accordance with the weaving conditions.

  (3) The heald frame 19 stopped in the open state moves along the same opening curve as the other heald frames 19 until the heald frame 19 stops after closing the mouth from the top dead center X or the bottom dead center Y. The change in the moving speed of the heald frame 19 from the top dead center X or the bottom dead center Y to the stop after the mouth is closed may be different from that of the other heald frames 19. However, when the opening curves are made to be the same, the warps opened and moved by the adjacent heald frames 19 move in the same manner, so that the warp handling is improved. Further, since it is not necessary to store the data of the special opening curve for the stop in the control means 32, the memory capacity can be reduced.

  (4) The shedding device is a shedding device in a loom provided with a plurality of heald frame drive systems in which a single heald frame 19 is independently driven via a crank mechanism by unidirectional rotation such as a single shedding motor 20A. . And the control means 32 which controls the opening motor 20A etc. so that the heald frame 19 moves according to an opening curve is provided. The control means 32 controls the opening motor 20A or the like to rotate in one direction while the heald frame 19 is moving, and when the heald frame 19 is stopped in the open state, the heald frame 19 is moved to the top dead center X or the bottom dead center. After the mouth is closed by a set amount from the point Y, the motor is stopped, and after the stop, the opening motor 20A and the like are controlled so that the rotation direction of the opening motor 20A and the like is reversed from before stopping and the hedging frame 19 resumes the opening motion.

  Therefore, as compared with an opening device in which another heald frame 19 moves in a state where some heald frames 19 are parked at the top dead center X or the bottom dead center Y corresponding to the weave pattern, the warp corresponding to the stationary frame is provided. Difference between the tension and the warp corresponding to the operation frame is reduced. Therefore, even when a part of the heald frame 19 is held at the stop position during weaving, such as a twill weave or a satin weave, an increase in motor load and a woven fabric quality caused by a difference in the warp tension between the operation frame and the stop frame. Can be suppressed. After stopping, the opening direction of the opening motor 20A and the like is reversed and the opening movement is restarted, so that the mouth is closed from the top dead center X or the bottom dead center Y during stoppage. The opening amount at the time can be secured.

The embodiment is not limited to the above, and may be embodied as follows, for example.
As shown in FIG. 9, the deceleration of the opening motor 20A or the like when the opening motor 20A or the like is stopped at a predetermined deceleration after the movement direction of the heald frame 19 is changed, Instead of the deceleration having the same opening curve as that of the frame 19, the deceleration may be constant until reaching the stop position. Further, as shown by a chain line in FIG. 9, the time required for stopping may be significantly longer. If the time required for stopping is increased, the load applied to the opening motor 20A and the like and the heald frame drive system is correspondingly reduced.

  The deceleration of the opening motor 20A and the like when the opening motor 20A and the like are stopped at a predetermined deceleration after changing the moving direction of the heald frame 19 is such that the stopped heald frame 19 has the same opening curve as the other heald frames 19. When moving from the state of stopping at the stop position to the top dead center X or the bottom dead center Y with such a deceleration, the movement may be performed without synchronizing with the other moving heald frame 19.

  ○ Instead of multiplying the data of the reference opening curve and the data of the opening curve by a coefficient corresponding to the weaving conditions to calculate the desired opening curve, the data of a plurality of opening curves corresponding to the weaving conditions is stored in the memory. You may keep it.

It is preferable that the acceleration and deceleration of the opening curve indicating the change in the moving speed of the heald frame 19 be set in accordance with the rotation speed of the main motor of the loom.
The connection arms 241, 242, and 243 may be connected to the connection member 22 without using the adapter 29, respectively.

  ○ The distance from the top dead center X of the upper stopping position of the heald frame 19 and the distance from the lower dead center Y of the lower stopping position are not limited to the same. In some cases, it is better that the stop position is closer to the lower side.

  As shown in FIG. 10, the crank mechanism for driving the heald frame 19 may be provided below the heald frame 19. A crank disk 40 is fixed to an output shaft (not shown) of the opening motor M, and the crank disk 40 and the lower frame of the heald frame 19 are connected via a connecting rod 41. The crank disk 40 and the connecting rod 41 constitute a crank mechanism, and the rotation of the opening motor M is converted into vertical movement of the heald frame 19 via the crank mechanism. The control unit 32 performs feedback control of the opening motor M based on rotation angle information obtained from the rotary encoder 42 incorporated in the opening motor M.

  M: Opening motor, X: Top dead center, Y: Bottom dead center, CX: Opening curve, XA: Opening curve, XB: Opening curve, 13, 14: Openings constituting a heald frame drive system Lever, 16: transmission rod, 17, 18: connecting rod, 21: crank arm, 22: coupling member, 204: rotary shaft, 20A, 20B, 20C, 20D, 20E, 20F: open motor, 32 ... Control means.

Claims (4)

An opening method in a loom having a plurality of heald frame drive systems in which a single heald frame is independently driven via a crank mechanism by a unidirectional rotation of a single opening motor,
When moving the other of said heald frame part of the heald frames corresponding to the weaving pattern in a state of being stationary in an open state, a set amount of the heald frame to stop from the top dead center or bottom dead center mouth Stop after closing,
A shedding method in a loom, wherein after the stop, the shedding motion is restarted by reversing the rotation direction of the shedding motor from that before the stop.   The shedding method according to claim 1, wherein the set amount is variably set for each heald frame.   The heald frame that stays in the open state moves along the same opening curve as the other heald frames until the heald frame stops rotating after continuing the rotation of the opening motor by a set amount from the top dead center or the bottom dead center. The shedding method in the loom according to claim 1 or 2, wherein the opening is performed. An opening device in a loom having a plurality of heald frame drive systems in which a single heald frame is independently driven via a crank mechanism by a unidirectional rotation of a single opening motor,
Control means for controlling the opening motor so that the heald frame moves in accordance with the opening curve,
The control means controls the opening motor to rotate in one direction during the movement of the heald frame, and the other heald frames are stopped in an open state corresponding to the weave pattern while the other heald frames are stopped. when moving the heald frame, the heald frame for stopping stops after closing the mouth by weight set from the top dead center or bottom dead center, stopping after the previous stop the rotation direction of the opening motor inverts the An opening device in a loom, wherein the opening motor is controlled so as to restart the opening movement of the heald frame.

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