JP2019143261A - Drive control method and drive control device of loom - Google Patents

Abstract

To provide a drive control method of a loom, capable of reducing a load applied to a main shaft driving device at starting of the loom in which the driving of a driving motor in the main shaft driving device for driving a main shaft is controlled so that the main shaft at a steady operation is rotationally driven according to a preset rotational speed.SOLUTION: A starting rotational speed set to a speed lower than a preset rotational speed is set in advance. The starting rotational speed is set in consideration of the load on a main shaft driving device and is equal to or lower than the preset rotational speed or equal to or more than 25% of the preset rotational speed. In the starting of the loom from a time point of the start to a time point when the rotational speed of the main shaft reaches the preset rotational speed, a driving motor is controlled so that: the starting is performed with a weft insertion in a start-up period over one cycle or more of the loom; the control of the driving motor from the time point of the start is performed based on the starting rotational speed; and the rotational speed of the main shaft increases from the starting rotational speed to the preset rotational speed in accordance with a predetermined rotational speed increasing mode after the time point when the rotational speed of the main shaft reaches the starting rotational speed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a loom drive control method and a drive control apparatus therefor in a loom in which the driving of a driving motor that drives the main shaft is controlled so that the main shaft is rotationally driven during steady operation according to a preset set rotational speed.

  In the loom, for example, as disclosed in Patent Document 1, the rotation speed of the main shaft at the time of steady operation is preset as a set rotation speed, and at the time of steady operation, the main shaft is driven to rotate at the set rotation speed. In this way, it is driven by a driving motor so that weaving is performed. In addition, in a general loom in recent years, at the time of starting from a stopped state, the rotation speed of the main spindle becomes the set rotation speed in a short start time (for example, a time corresponding to 1 to 2 cycles of the loom). The loom is activated in such a manner that the drive of the driving motor is controlled so as to reach the limit.

  However, in the starting method of the loom that starts up the spindle speed to the set speed in a short starting time as described above, an excessive load is applied to the spindle driving device including the driving motor depending on the weaving conditions and the like. There is.

  Specifically, for example, a case where the set rotational speed is high can be cited as an example. That is, when the set rotational speed is high and the start-up time is short, the driving motor is required to accelerate according to the set rotational speed and the start-up time. As a result, an excessive load is applied. In addition, when the number of frames used in the opening device is large, or when a large force is required to drive the reed frame depending on the type of warp used for weaving or the set tension, the opening device is used as a driving motor. In the weaving machine using as a drive source, a load applied to the spindle drive device at the time of starting is large. Therefore, even in that case, if the spindle is started up in a short time as described above, an excessive load is applied to the spindle drive device.

  When the loom starts up, the spindle drive device is overloaded as described above. Depending on the state of the loom at that time, the rotation speed of the main spindle can be set within the assumed start-up time. There is a case in which a problem such as a state in which a defect such as a weaving step occurs in the woven fabric without causing the weaving in a desired state does not occur. Furthermore, if the above-described excessive load is applied to the spindle drive device every time the loom is started, there is a possibility that a problem may occur that the spindle drive device is damaged early.

Japanese Patent Laid-Open No. 5-64478

  Therefore, in order to prevent the occurrence of the above-described problem, the starting time assumed for starting up the rotation speed of the spindle to the set rotation speed is not a short time as described above, but a longer time (a plurality of looms). It is conceivable to start the loom by a starting method in which the rotation speed of the main shaft is increased linearly over a long starting time. According to such a starting method, the load applied to the spindle drive device is reduced as compared with the case where the rotational speed of the main spindle is increased to the set rotational speed in a short starting time as described above. Occurrence can be prevented as much as possible.

  However, when the loom is started in such a long start-up time over a plurality of cycles of the loom, it is desirable that weft insertion is performed during that period. This is because, as the driving of the main shaft (primary motor) is started, the rocking motion of the kite using it as the driving source is also started. This is because there is a risk that a woven step (thick step) may occur in the woven fabric due to this.

  However, when the loom is started with a long start-up time as described above, there is a possibility that even if weft insertion is performed, a woven step (thin step) is generated in the woven fabric. Specifically, when the rotational speed of the main shaft is linearly raised to a set rotational speed over a plurality of cycles of the loom, the acceleration gradient of the rotational speed of the main shaft becomes gentle. Therefore, the loom is operated in a state where the rotation speed of the main shaft is low for several cycles immediately after the start of starting, and weaving with weft insertion is performed in this state. However, in such a state where the rotation speed of the main shaft is low, the beating force due to the rocking motion of the reed is weak, so that the weft thread inserted between them is not sufficiently driven, and a thin step may occur. .

  Therefore, the present invention reduces the load applied to the spindle drive device when starting up the rotation speed of the spindle, and performs the weft insertion during the start-up period, and further reduces the hitting force as described above. The purpose is to prevent the occurrence of weaving steps.

  In order to achieve the above object, the loom drive control method according to the present invention controls the drive of the driving motor in the main shaft drive device that drives the main shaft so that the main shaft is rotationally driven during steady operation according to a preset set rotational speed. In the loom to be operated, the starting rotational speed is set to a lower rotational speed than the set rotational speed, and is equal to or lower than the rotational speed determined in consideration of the load of the spindle driving device and 25% or more of the set rotational speed. The starting rotational speed set in (1) is preset. Then, in starting the loom from the start of starting until the rotation speed of the spindle reaches the set rotation speed, the start is performed with a weft insertion in a start-up period over one or more cycles of the loom, and The driving motor is controlled according to the starting rotational speed from the starting start time, and after the time when the rotational speed of the main shaft reaches the starting rotational speed, the rotation of the main shaft according to a predetermined rotational speed increasing mode. The driving of the driving motor is controlled so that the number increases from the starting rotational speed to the set rotational speed.

  Further, the drive control device according to the present invention controls the driving of the driving motor in the main shaft driving device that drives the main shaft so that the main shaft is rotationally driven at the time of steady operation according to a preset set rotational speed and executes weft insertion. The operation of each weft insertion-related device involved in weft insertion is controlled as much as possible, and the starting rotation speed is set to a lower rotation speed than the set rotation speed, and is determined in consideration of the load of the spindle drive device A starting rotational speed that is less than the rotational speed and set to 25% or more of the set rotational speed, and a predetermined rotational speed increasing mode for increasing the rotational speed of the spindle from the starting rotational speed to the set rotational speed A storage unit in which drive setting values set in accordance with are stored. In addition, the driving motor is operated such that starting of the loom from the start of starting of the loom until the rotational speed of the main shaft reaches the set rotational speed is performed with weft insertion in a starting period of one or more cycles of the loom. And the operation of each weft insertion related device is controlled, and the motor is controlled according to the starting rotational speed from the starting start time, and the rotational speed of the main shaft reaches the starting rotational speed. After the time point, the drive motor is controlled based on the drive setting value so that the rotation speed of the spindle increases from the start rotation speed to the set rotation speed in accordance with the rotation speed increasing mode.

  The “one cycle of the loom” described above is a period corresponding to a period in which the main shaft makes one rotation (0 ° to 360 °) during continuous operation of the loom, and a series of weaving operations (wefts) during the period. This is a period during which the insertion to the beating is performed once. Further, the “weft insertion related device” is a device related to the weft insertion of the weft drawn from the yarn feeder, and includes, for example, a length measuring storage device (locking pin) and a main nozzle. Further, when the weft inserting device includes an auxiliary main nozzle, a sub nozzle, a weft brake, a clamper, etc., these are also included in the “weft inserting related device”.

  Further, in the drive control method and drive control apparatus according to the present invention, the rotation speed increasing mode is one or more intermediate rotation speeds determined as a rotation speed lower than the set rotation speed and higher than the starting rotation speed. It may be determined to include a state in which the main shaft is rotationally driven over one or more cycles of the loom.

  Furthermore, after the rotation speed increasing mode is determined so that the intermediate rotation speed is included as described above, the present invention sets the rotation speed increase amount toward the intermediate rotation speed in the loom, and the start rotation Control of driving of the driving motor in the process of increasing the rotational speed from a number to the set rotational speed may be performed based on the rotational speed increase amount. In this case, in the drive control device, the drive setting value is set so as to include the rotation speed increase amount.

  In the loom, a basic weft insertion condition that is a weft insertion condition for the weft insertion during the steady operation is set in the loom in advance, and the weft insertion during the steady operation is performed according to the basic weft insertion condition. In the loom, the drive control method and the drive control device according to the present invention are used in the start-up period when the main shaft is rotationally driven in accordance with the start rotational speed and the main shaft is rotationally driven in accordance with the intermediate rotational speed. The weft insertion may be performed according to the weft insertion conditions determined according to the respective rotation speeds.

  Further, the weft insertion conditions when the main shaft is rotationally driven according to the starting rotational speed and the weft insertion conditions when the main shaft is rotationally driven according to the intermediate rotational speed are based on the basic weft insertion conditions and the respective rotational speeds. It may be obtained by calculation. The “weft insertion condition” referred to here is a setting of the operation timing of the weft insertion related device.

  According to the loom drive control method and the drive control apparatus according to the present invention, the prime motor is controlled from the start start point according to the start rotation speed set as described above, and the rotation speed of the main shaft is set to the start rotation speed. After the time when the rotational speed is reached, the driving motor is controlled in accordance with the rotational speed increasing mode. Thereby, compared with the conventional starting method in which the driving motor is controlled so as to increase the rotational speed of the spindle to the set rotational speed in a short starting time, the rotational speed of the main spindle is reduced to the set rotational speed. The load applied to the spindle drive device during the startup period is reduced. As a result, there are problems such as the occurrence of defects such as weaving steps in the woven fabric that does not rise up to the set rotation speed within the assumed start-up time, and excessive load on the spindle drive device repeatedly. It is possible to prevent the occurrence of the problem that the spindle drive device is damaged early by being applied.

  In addition, according to the present invention, the starting period is set to a long period over a plurality of loom cycles in order to reduce the load applied to the spindle driving device, and the rotational speed of the spindle is gradually and constant accelerated. Compared to the starting method of increasing to the set rotational speed with a gradient, it is possible to generate a sufficient striking force from the loom cycle immediately after the start of starting, so that the woven fabric caused by the above-described idle driving and striking force shortage Generation of the weaving step can be prevented.

  In addition, by determining that the rotational speed increasing mode includes a state in which the main shaft is rotationally driven for at least one cycle of the loom at the intermediate rotational speed as described above, the present invention includes a weft insertion in the starting period. However, the weft insertion can be performed stably.

  Further, by making the weft insertion in the start-up period in accordance with the weft insertion conditions determined according to the respective rotational speeds as described above, the weft insertion in the start-up period is performed under more optimal weft insertion conditions. Will be done. Then, the weft insertion condition for weft insertion in the start-up period is obtained by calculation based on the basic weft insertion condition as described above and the respective rotation speeds as described above, Even when the set rotational speed or the rotational speed increasing mode is changed, the labor for manually inputting the weft insertion condition for each change is eliminated, so that the burden on the operator in the setting work can be reduced. .

1 is an overall configuration diagram showing an air jet loom to which the present invention is applied. It is a block diagram which shows the internal structure of the drive control apparatus of this invention. It is explanatory drawing which shows a series of flows until the rotation speed of the main axis | shaft reaches the setting rotation speed by the drive control method of the loom of this invention.

  Below, based on FIGS. 1-3, one Example of this invention is described. However, in this embodiment, the present invention will be described by taking an air jet loom as an example of a presumed loom.

  As shown in FIG. 1, in the air jet loom 1, a weft insertion device 10 stores a yarn feeder 11, and a length measuring unit that stores a weft drawn from the yarn feeder 11 by a length corresponding to the weft insertion length. A storage device 12, a main nozzle 13 for weft insertion, a plurality of sub-nozzles 14 for assisting the wefts ejected from the main nozzle 13, and a yarn feeding cutter 15 for cutting the wefts inserted Contains. Further, in the illustrated example, the weft inserting device 10 is provided on the upstream side of the main nozzle 13, and the auxiliary main nozzle 16 that assists the weft insertion by the main nozzle 13, and the braking force is applied to the weft at the end of the weft insertion. The weft brake device 17 is included.

  In the weft insertion device 10, the main nozzle 13 and the auxiliary main nozzle 16 adjust the pressure of the compressed air supplied to the electromagnetic on-off valves 13 a and 16 a and the nozzles 13 and 16 provided corresponding to the main nozzle 13 and the auxiliary main nozzle 16, respectively. Therefore, it is connected to a fluid supply source 18 that supplies compressed air via pressure regulators 13b and 16b. Further, each sub nozzle 14 is connected to a fluid supply source 18 common to the main nozzle 13 via an electromagnetic on-off valve 14 a provided in correspondence with each sub nozzle 14 and a pressure regulating device 14 b common to each sub nozzle 14.

  In addition, in the air jet loom 1, the electromagnetic on-off valves 13a and 16a are controlled at a preset injection start timing to supply compressed air to the main nozzle 13 and the auxiliary main nozzle 16, and continue. At the weft insertion start timing, the locking pin 12a is driven in the length measuring storage device 12, and the locking of the weft on the storage drum 12b by the locking pin 12a is released. Thereby, the weft insertion operation in which the weft is injected from the main nozzle 13 is started while the weft stored on the storage drum 12b in the length measuring storage device 12 is unwound.

  Further, the wefts injected from the main nozzle 13 fly in the warp opening while being assisted by the compressed air injected from the sub-nozzles 14. Then, the weft thread is restrained by the latch pin 12a engaging the weft thread in the length measuring storage device 12 at the weft insertion end timing, which is the timing at which the tip of the weft thread reaches a predetermined position on the counter-feeding side. The flight stops and one weft insertion is completed. The injection of compressed air from the main nozzle 13 and the auxiliary main nozzle 16 is stopped at the injection end timing set as the timing during the weft insertion period.

  Further, when the weft brake device 17 is operated at the end of the weft insertion, the weft flying speed is reduced, and the impact applied to the wefts when restrained by the locking pin 12a is alleviated. When the weft insertion is completed in this way, the weft thread inserted is beaten against the front of the weave by the scissors 19 and the warp opening is closed, so that the weft thread inserted is woven into the front of the weave. It will be in the state. Further, after the beating, the weft yarn connected to the main nozzle 13 is cut by the yarn feeding cutter 15. As a result, the weft thread inserted through the main nozzle 13 has a free end at which the next weft can be inserted. Incidentally, the warp opening device (not shown) for forming / closing the warp opening and the heel 19 are connected to the main shaft 20 of the air jet loom 1, and are driven during weaving in a predetermined manner using the main shaft 20 as a drive source. Is done.

  Further, in such an air jet loom 1, the weft insertion device 10 includes the operation and length measurement of the electromagnetic on-off valves 13a and 16a for controlling the supply of compressed air to the main nozzle 13, the auxiliary main nozzle 16 and the sub nozzles 14. The weft insertion control device 32 for controlling the forward / backward movement of the locking pin 12a in the storage device 12 and the operation of the weft brake device 17 (more specifically, driving of the drive motor 17b for driving the braking member 17a in the weft insertion device 10). Is included.

  The weft insertion control device 32 has a storage device 32a. The storage device 32a has injection start / end timings of the main nozzle 13, the auxiliary main nozzle 16 and the sub nozzles 14 as weft insertion conditions, and weft insertion. Setting values such as start / end timing, start / end timing of operation of the weft brake device 17 are stored.

  The air jet loom 1 includes an input setter 40, and each set value is set in the input setter 40 and transmitted from the input setter 40 to the weft insertion control device 32. Are stored in the storage unit 32a. The air jet loom 1 includes an angle detector 50 that detects the rotation angle of the main shaft 20, and is configured to detect the rotation angle in units of one rotation of the main shaft 20. The detected rotation angle of the main shaft 20 is also output to the weft insertion control device 32.

  In addition, the weft insertion control device 32, based on the rotation angle of the spindle 20 output from the angle detector 50 and each set value in the storage device 32a, each electromagnetic on-off valve 13a in the weft insertion device 10 described above. , 14a, 16a, advance / retreat operation of the locking pin 12a, operation of the weft brake device 17 and the like.

  Specifically, with respect to the main nozzle 13 and the auxiliary main nozzle 16, the weft insertion control device 32 sets the injection start timing set value set for the main nozzle 13 and the auxiliary main nozzle 16 and the rotation angle position of the main shaft 20 ( Hereinafter, at the point of time when “the crank angle” coincides, control is performed to open the electromagnetic on-off valve 13 a corresponding to the main nozzle 13 and the electromagnetic on-off valve 16 a corresponding to the auxiliary main nozzle 16. Thereby, the supply of compressed air to the main nozzle 13 and the auxiliary main nozzle 16 is started, and the injection of compressed air from the main nozzle 13 and the auxiliary main nozzle 16 is started at the injection start timing. The weft insertion control device 32 also opens each electromagnetic on-off valve 13a opened as described above when the set value of the injection end timing set for the main nozzle 13 and the auxiliary main nozzle 16 coincides with the crank angle. , 16a is executed. Accordingly, the supply of compressed air to the main nozzle 13 and the auxiliary main nozzle 16 is stopped, and the injection of compressed air from the main nozzle 13 and the auxiliary main nozzle 16 is stopped at the injection end timing.

  Further, for each sub nozzle 14, the weft insertion control device 32 sets the electromagnetic on-off valve 14a corresponding to each sub nozzle 14 at the time when the set value of the injection start timing set for each sub nozzle 14 matches the crank angle. Execute the control to open the valve. Thereby, supply of compressed air to each sub nozzle 14 is started, and injection of compressed air from each sub nozzle 14 is started at each injection start timing. Further, the weft insertion control device 32 executes control to close each electromagnetic on-off valve 14a when the set value of the injection end timing set for each sub-nozzle 14 matches the crank angle. As a result, the supply of compressed air to each sub nozzle 14 is stopped, and the injection of compressed air from each sub nozzle 14 is stopped at each injection end timing.

  Further, with respect to the length measuring storage device 12, the weft insertion control device 32, when the set value of the weft insertion start timing coincides with the crank angle, the locking pin 12a to separate the locking pin 12a from the storage drum 12b. Is controlled (more specifically, control of a driving device such as a solenoid that drives the locking pin 12a forward and backward). As a result, the length measuring storage device 12 is in a state where the wefts stored on the storage drum 12b can be unwound (a state in which weft insertion is possible). Further, the weft insertion control device 32 directs the locking pin 12a toward the storage drum 12b so that the weft can be locked at a predetermined advance timing of the locking pin 12a (timing before the end of weft insertion). Control to advance. As a result, the length measuring and storing device 12 is in a state in which the weft can be locked by the locking pin 12a, and the weft that circulates around the storage drum 12b as the above-described weft travels is caused by the locking pin 12a. The weft is stopped, and the flying of the weft is stopped.

  Further, with respect to the weft brake device 17, the weft insertion control device 32 applies a braking force to the weft when the set value of the operation start timing set for the weft brake device 17 coincides with the crank angle. In this way, control for driving the braking member 17a by the drive motor 17b is executed. However, the operation start timing is set as the end of the weft insertion process (end of weft insertion). At the end of weft insertion, the weft is bent by the braking member 17a on the yarn supply side, and the flying weft is braked. Further, the weft insertion control device 32 drives the brake member 17a by the drive motor 17b so as to be separated from the weft when the set value of the operation end timing set for the weft brake device 17 coincides with the crank angle. Execute control. However, the operation end timing is set as a timing after the weft insertion ends. And the state where the weft was bent is canceled by the drive of the braking member 17a.

  As described above, in the air jet loom 1 of this embodiment, the locking pin 12a in the length measuring storage device 12 is advanced and retracted, the main nozzle 13, the auxiliary main nozzle 16 and the sub nozzles 14 are jetted. The operation of the weft brake device 17 is controlled according to the setting value of the weft insertion condition stored in the storage device 32a. In addition, during weaving in the steady operation state, the operation of each device described above is controlled according to the basic weft insertion condition as the weft insertion condition for steady operation. In this embodiment, the length measuring storage device 12 (locking pin 12a), the main nozzle 13, the auxiliary main nozzle 16, each sub nozzle 14, and the weft brake device 17 whose operation is controlled according to the weft insertion conditions are provided. This corresponds to the weft insertion-related device in the present invention.

  The air jet loom 1 has a main controller 31, and the input setting unit 40 is connected to the main controller 31. The weft insertion control device 32 is also connected to the main control device 31. Further, the angle detector 50 described above is also connected to the main controller 31, and the rotation angle of the main shaft 20 detected by the angle detector 50 is input to the main controller 31. The rotation angle of the main shaft 20 detected by the angle detector 50 is output to the weft insertion control device 32 through the main control device 31 as described above.

  The air jet loom 1 also includes an inverter 33 that controls the driving of the driving motor 60a in the main shaft driving device 60 that rotationally drives the main shaft 20. The air jet loom 1 is configured to control the drive of the driving motor 60a by controlling the inverter 33 based on the target rotational speed of the main shaft 20. Specifically, the inverter 33 generates an output frequency corresponding to the target rotation speed of the main shaft 20 (main shaft rotation speed), and the driving motor 60a has a rotation speed (target rotation speed) corresponding to the target main shaft rotation speed. ) To control the driving of the driving motor 60a. That is, the driving motor 60 a is controlled so as to be driven at a rotational speed corresponding to the output frequency of the inverter 33. Incidentally, in the present embodiment, in the air jet loom 1, the driving motor 60a is connected to the main shaft 20 via a drive transmission mechanism (not shown), and the rotation of the driving motor 60a (output shaft) causes the drive transmission mechanism to rotate. It is comprised so that it may be transmitted to the main axis | shaft 20 via this. Therefore, the main shaft driving device 60 in the air jet loom 1 of this embodiment also includes the drive transmission mechanism.

  However, in a general loom in recent years, at the time of start-up, control (for example, steady operation) when changing the rotation speed during steady operation so that the rotation speed of the driving motor 60a reaches the target rotation speed in a short time. Compared with the time control), control (startup control) of the driving motor 60a in a different state is performed. Also in the air jet loom 1 of this embodiment, at the time of startup in which the rotational speed of the driving motor 60a is started from a zero state, the driving of the driving motor 60a is controlled by the startup control. In addition, after the spindle rotational speed reaches the set rotational speed for steady operation, the driving of the driving motor 60a is controlled by the steady operation control.

  As described above, the air jet loom 1 includes the main control device 31, the weft insertion control device 32, and the inverter 33. Each control device is included in the drive control device 30 of the air jet loom 1. In addition, according to the present invention, when the loom starts up, the drive control device 30 of the driving motor 60a starts up the spindle rotational speed to a set rotational speed that is the rotational speed at the time of steady operation as in the prior art. Rather than performing control, first the spindle speed is raised to the starting speed set as a lower speed than the set speed, and the spindle speed determined in advance after the starting speed is reached. The drive motor 60a is controlled so that the spindle rotational speed increases to the set rotational speed in accordance with the above-described increase mode (rotational speed increase mode). Hereinafter, a specific configuration of the drive control device 30 will be described in detail.

  The drive control device 30 includes a drive control unit 34 connected to the inverter 33 described above. Further, the drive control unit 34 includes a storage unit 34a in which the set rotational speed and the starting rotational speed are stored. Further, the drive control unit 34 is connected to the main control device 31 described above. The set rotational speed and the starting rotational speed are set in the input setting device 40 and transmitted from the input setting device 40 to the drive control unit 34 via the main control device 31 so as to be stored in the storage unit 34a. Remembered. Further, the rotation angle of the main shaft 20 detected by the angle detector 50 and input to the main control device 31 as described above is also output to the drive control unit 34 via the main control device 31.

  Then, the drive control unit 34 sends a frequency command signal corresponding to the target spindle speed to the inverter 33 so that the inverter 33 generates an output frequency corresponding to the target spindle speed as described above. Output. Therefore, when starting up the spindle rotational speed toward the starting rotational speed as described above, at the start of starting, the drive control unit 34 outputs a frequency command signal corresponding to the starting rotational speed, and the inverter 33 An output frequency corresponding to the starting rotational speed is generated according to the frequency command signal. Further, in increasing the spindle rotational speed from the starting rotational speed to the set rotational speed in accordance with the above-described rotational speed increasing mode, a frequency command signal corresponding to the rotational speed increasing mode is output, and the inverter 33 is in accordance with the frequency command signal. An output frequency corresponding to the rotation speed increasing mode is generated.

  As for the starting rotational speed, the starting rotational speed is a rotational speed that is set as a rotational speed lower than the set rotational speed as described above. It is set as the rotation speed below the rotation speed determined in consideration of the applied load. However, in the present invention, the starting rotational speed is set as a rotational speed that is 25% or more of the set rotational speed. More details are as follows.

  As an example, in this embodiment, it is assumed that the set rotational speed is set to 1800 rpm which is very high compared with the rotational speed in general weaving. In that case, even if the loom specifications and weaving conditions are the same, the spindle speed up to the set speed in the same time as the start-up time (time to increase the spindle speed to the set speed) in general weaving If an attempt is made to start up, an excessive load is applied to the spindle driving device, and there is a possibility that the above-mentioned problem due to the load may occur. Therefore, the starting rotational speed is set after determining the rotational speed (allowable rotational speed) that does not cause the above problem in consideration of the time to start up the main spindle and the load applied to the main spindle driving device at that time. . In addition, although the permissible rotation speed varies depending on the specifications of the loom, the weaving conditions, and the like, in this embodiment, it is set to 1000 rpm as an example.

  By setting the allowable rotational speed as described above, the starting rotational speed is set as a rotational speed lower than that. However, the starting rotational speed is set as a rotational speed that is 25% or more of the set rotational speed as described above. The reason for this is that the present invention presupposes that wetting is performed even during the start-up period (start-up period) until the spindle speed increases from the zero state to the set speed. In that case, a sufficient striking force is required from the loom cycle immediately after the start of the start so that the weaving step due to the lack of the striking force described above does not occur. This is because the rotation speed must be set so as to obtain such a sufficient striking force even immediately after the start.

  As such, there is basically no problem if the starting rotational speed is 25% or more of the set rotational speed. However, for example, depending on the specifications of the loom and the weaving conditions, even if the starting rotational speed is 25% or more, it is beaten. There may be a lack of power. Therefore, in the present invention, the starting rotational speed is more preferably set as a rotational speed that is 40% or more of the set rotational speed. In addition, in this embodiment, in order to secure a sufficient striking force and to shorten the time for increasing the spindle speed to the set speed, the starting speed is set to the upper limit of the allowable speed, that is, 1000 rpm. It is assumed that it is set to. The 1000 rpm is 40% or more of the set rotation speed of 1800 rpm.

  Further, with respect to the above-described rotation speed increase mode, the rotation speed increase mode defines how to increase the spindle rotation speed from the start rotation speed to the set rotation speed. As the speed increase mode, for example, one or more rotational speeds ("intermediate rotational speed" referred to in the present application) that are higher than the starting rotational speed and lower than the set rotational speed are determined, and from the starting rotational speed to the intermediate rotational speed Thus, it is conceivable to increase the spindle rotational speed stepwise by increasing the spindle rotational speed and increasing the spindle rotational speed from the intermediate rotational speed toward the set rotational speed. However, in the aspect, when the intermediate rotational speed is set to 2 or more, a step of increasing the spindle rotational speed from the lower intermediate rotational speed toward the higher intermediate rotational speed is included.

  In addition, in this embodiment, the rotational speed increasing mode is determined such that the spindle rotational speed is increased stepwise up to a set rotational speed over a plurality of predetermined predetermined rotational speed increasing amounts. It shall be. In other words, the rotational speed increasing mode of the present embodiment divides the rotational speed range from the starting rotational speed to the set rotational speed into a plurality of equal parts, and the spindle rotational speed in stages up to the set rotational speed via each intermediate rotational speed. It is assumed that it is determined in such a manner that is raised. Specifically, in this embodiment, the range (1000 rpm to 1800 rpm) is divided into four, and the spindle speed is increased by 200 rpm toward each of the intermediate speeds (1200 rpm, 1400 rpm, 1600 rpm). The speed increase mode is determined in such a manner. In addition, in this embodiment, it is assumed that the rotation speed increase amount 200 rpm is stored in the storage unit 34 a of the drive control unit 34. The rotational speed increase amount is also input and set by the input setting unit 40 and transmitted to the storage unit 34a.

  By the way, in a general loom start-up method, the start-up of the spindle speed up to the set speed at the start-up is performed by the start-up control as described above. On the other hand, in the present embodiment, the starting method is such that the start-up of the spindle speed up to the starting rotational speed is performed by the starting control, while the spindle rotational speed reaches the starting rotational speed. It is assumed that the spindle rotational speed is set to be controlled according to the steady operation control when the spindle rotational speed is increased to the set rotational speed. That is, the increase in the spindle rotational speed toward the intermediate rotational speed and the increase in the spindle rotational speed from the intermediate rotational speed toward the set rotational speed are performed according to the steady operation control.

  In the steady operation control, the time required to increase the spindle speed by the amount of rotation to be increased is affected by the configuration of the spindle drive device 60, the load applied to the spindle drive device 60, and the like. Therefore, in the aspect of increasing the rotational speed of the present embodiment, the spindle rotational speed is set next from the time when the frequency command signal is output from the drive control unit 34 in order to increase the spindle rotational speed toward the intermediate rotational speed as described above. In order to increase the rotation speed toward the intermediate rotation speed (or set rotation speed), the period until the time when the frequency command signal is output from the drive control unit 34 is set in consideration of the influence as described above. Specifically, in the present embodiment, the rotational speed increasing mode is determined so that the period is two cycles of the loom. In addition, the set value (set period) of the period (two cycles) is stored in the storage unit 34 a of the drive control unit 34 in order to realize the speed increase mode. The setting period is also input and set by the input setting unit 40 and transmitted to the storage unit 34a.

  According to the drive control device 30 of the present embodiment as described above, the operation button provided on the input setting device 40 is operated by the operator to start the operation of the air jet loom 1, and the operation signal is input to the input setting device. When output from 40 toward the main controller 31, the operation signal is input to the drive controller 34 via the main controller 31. The drive control unit 34 is switched to a state in which the above-described start control is executed in accordance with the input of the operation signal, and outputs a frequency command signal corresponding to the start rotation speed (1000 rpm) to the inverter 33. As a result, the drive of the driving motor 60a is controlled by the startup control, and the spindle rotational speed is raised to the startup rotational speed in a short time.

  Then, after the spindle rotational speed reaches the starting rotational speed, the drive control unit 34 is switched to a state in which the drive motor 60a is controlled to increase the spindle rotational speed in accordance with the rotational speed increasing mode determined as described above. In this embodiment, it is assumed that the switching time (switching time) is set to the time when a period in which the main shaft 20 rotates about two revolutions has elapsed after the operation button is operated. Specifically, the switching time point needs to be set to a point in time after the operation button is operated (from the time when the driving signal is generated) until the spindle rotational speed reaches the starting rotational speed. Then, the period during which the spindle rotation speed rises to the rotation speed set by the activation control after the operation button is operated can be grasped from tests or past results. Therefore, in the present embodiment, the switching time is set as described above based on the grasped period. Specifically, it is assumed that the crank angle at the start of activation is 300 °, and the switching time is determined so that the crank angle reaches the second 360 ° (0 °). It shall be.

  The switching time determined as such is stored in the storage unit 34a of the drive control unit 34. Further, the drive control unit 34, based on the crank angle output from the main controller 31 and the switching time stored in the storage unit 34a, the crank angle reaches the switching time after the operation button is operated. It is comprised so that it may be determined. Then, the drive control unit 34 is switched from the start-up control to the state in which the steady operation time control is executed at the time when it is determined that the crank angle has reached the switching time, and is rotated with respect to the inverter 33. A frequency command signal corresponding to the number increasing mode is output.

  The frequency command signal output from the drive control unit 34 after the switching time is a frequency command signal corresponding to the above-described intermediate rotational speed. However, as described above, in the present embodiment, the information stored in the storage unit 34a is not the intermediate rotation speed but the rotation speed increase amount (200 rpm) as described above. Therefore, when the drive control unit 34 outputs the frequency command signal, the drive control unit 34 calculates the number of rotations to be increased next, and then outputs the calculated number of rotations (calculated rotation number). . In other words, the drive control unit 34 of this embodiment has a function (calculation function) for obtaining such a calculated rotation speed. Specifically, the drive control unit 34 adds the amount of increase in the rotation speed to the main shaft rotation speed (starting rotation speed or intermediate rotation speed) at the time when the frequency command signal is output, and the calculated rotation obtained thereby. A frequency command signal corresponding to the number is output. In the present embodiment, as described above, the amount of increase in the rotational speed which is stored in the storage unit 34a and used for obtaining the next calculated rotational speed for outputting the next frequency command signal is referred to in the present invention. This corresponds to the drive setting value.

  Therefore, the frequency command signal output from the drive control unit 34 at the time of switching is calculated rotational speed (intermediate) obtained by adding the rotational speed increase (200 rpm) to the starting rotational speed (1000 rpm). Frequency command signal corresponding to the number of revolutions = 1200 rpm). Then, the inverter 33 controls the driving motor 60a according to the output frequency based on the frequency command signal, so that the main shaft rotational speed increases to the first intermediate rotational speed (1200 rpm).

  Further, in order to realize the rotation speed increasing mode of the present embodiment, the drive control unit 34 stores the set period (2 cycles) in the storage unit 34a as described above, and the rotation speed increases every two cycles. It is comprised so that the frequency command signal according to an aspect may be output. Further, the drive control unit 34 is configured to perform the calculation of the calculated rotation speed by the calculation function as described above at a predetermined timing (calculation timing) set before the output time of the next frequency command signal. It shall be.

  Therefore, for example, the “after” time point, which is the time point when two cycles have elapsed from the switching time point (“first” time point at which the frequency command signal corresponding to the calculated rotation speed is output), is output at the subsequent time point. The rotation speed that is the basis of the frequency command signal is calculated at a calculation timing before the later time point and after the earlier time point (the switching time point). Then, a frequency command signal corresponding to the calculated rotation speed (1200 + 200 = 1400 rpm) obtained at the calculation timing is output at the subsequent time point, and as a result, the spindle rotation speed increases to the next intermediate rotation speed (1400 rpm). . Thereafter, the later time point becomes the previous time point, and the second cycle later becomes the later time point, and calculation of the calculated rotational speed and output of a frequency command signal corresponding to the calculated rotational speed are performed in the same manner as described above. Is done.

  In addition, when the calculated rotation speed obtained by the calculation function matches the set rotation speed, the drive control section 34 is based on the set rotation speed stored in the storage section 34a instead of the calculated rotation speed. The frequency command signal is output, and the calculation function thereafter is invalidated (no calculation is performed). As a result, the main shaft rotational speed is increased to the set rotational speed (1800 rpm), and after reaching the set rotational speed, the air-jet loom 1 does not increase the main shaft rotational speed any more. The main shaft 20 is driven to rotate at a set rotational speed (steady operation state).

  Incidentally, when the manner of increasing the spindle rotational speed of the present embodiment as described above is represented by a diagram, it is as shown by a solid line in FIG. In addition, when the main shaft 20 is driven in such a manner, the actual change in the main shaft rotation speed is as shown by a broken line in FIG.

  As described above, according to the loom drive control method (startup method) at the time of start-up by the drive control device 30 of the present embodiment, the main shaft drive device 60 has a rotation speed lower than the set speed and at the start-up of the loom. The loom is started in such a way that the spindle speed is once raised up to the start speed set in consideration of the load applied to the machine, and then the spindle speed is raised to the set speed in accordance with a predetermined speed increase mode. The Therefore, according to the activation method, the load applied to the spindle drive device 60 at the time of activation is reduced as compared with the conventional activation method (conventional method) in which the spindle rotation speed is increased to the set rotation speed at a stroke as in the prior art. .

  According to the start-up method, the load applied to the spindle drive device 60 is reduced as described above. Therefore, the start-up control mode is performed in a conventional general loom, and the target can be quickly achieved. Even if the loom is started in a control mode in which the main shaft rotational speed is increased to the rotational speed to be rotated (starting rotational speed in the case of the present invention), the load applied to the main shaft driving device 60 at the time of starting is allowed. Therefore, it is not necessary to start the loom with a starting method such as starting up the spindle speed with a gentle acceleration gradient up to the set speed in consideration of the load. There are no steps.

  Further, in this embodiment, the rotational speed increasing mode is determined to include a plurality of intermediate rotational speeds as described above. As a result, the present invention presupposes that weft insertion is performed during the start-up period as described above, but the weft insertion is performed stably.

  Specifically, in the present invention, the rotational speed increasing mode may not include the intermediate rotational speed, that is, the main shaft rotational speed may be increased at a stroke from the starting rotational speed to the set rotational speed. And even if it is the aspect, compared with the said conventional method, the load concerning the spindle drive device 60 at the time of starting is reduced. However, in this case, the spindle rotational speed continuously changes from the starting rotational speed to the set rotational speed. On the other hand, the rotational speed increasing mode of this embodiment is defined as a mode that includes a plurality of intermediate rotational speeds and gradually increases the spindle rotational speed from the starting rotational speed to the set rotational speed through each intermediate rotational speed. .

  Specifically, the rotation speed increase mode is such that the amount of increase in the spindle rotation speed that is increased by the output of the frequency command signal is 200 rpm, and the frequency command signal sets the interval between the two cycles of the loom. Are set to be output at the same time. In the present embodiment, the setting period set to 2 cycles is set in consideration of the influence of the load applied to the spindle driving device 60 as described above, and the rotation with the spindle speed set. This is a period (sufficiently) longer than the period required to increase by several increments (200 rpm).

  Therefore, according to the rotation speed increasing mode defined as described above, there is a period in which the main shaft 20 is rotationally driven at the intermediate rotation speed while the main shaft rotation speed increases from the starting rotation speed to the set rotation speed. Become. Further, the amount of increase (change) in the number of revolutions during the period in which the number of revolutions increases is smaller than that in the case where the main shaft revolution changes continuously. As a result, the present invention is premised on performing the weft insertion even in the start-up period, but the weft insertion is performed stably.

  Further, the drive control device 30 of the present embodiment does not insert the weft in the start-up period at a time point before the frequency command signal corresponding to the set rotational speed is output, instead of the basic weft insertion condition described above. It shall be configured to perform in accordance with the weft insertion conditions determined according to the rotational speed (starting rotational speed or intermediate rotational speed (calculated rotational speed)) in each operating state of the loom that exists over one cycle or more. .

  Specifically, in the drive control device 30, the drive control unit 34 is also connected to the above-described weft insertion control device 32. Then, when the drive control unit 34 outputs the frequency command signal to the inverter 33, the drive control unit 34 sets the starting rotation speed or the intermediate rotation speed (calculated rotation speed) based on the output frequency command signal to the weft insertion control device. It is assumed that the data is output to 32. However, when the calculated rotation speed obtained by the calculation function matches the set rotation speed, the drive control section 34 inserts the set rotation speed stored in the storage unit 34a instead of the calculated rotation speed. It is assumed that it is configured to output to the control device 32.

  In addition, the weft insertion control device 32 determines each input rotational speed based on the starting rotational speed or the calculated rotational speed (hereinafter collectively referred to as “input rotational speed”) input from the drive control unit 34. According to the determined weft insertion condition, weft insertion is performed for two cycles from the time when the drive control unit 34 outputs a frequency command signal corresponding to the input rotation speed. It shall be.

  In this embodiment, regarding the method of obtaining the weft insertion condition corresponding to each input rotation speed in the weft insertion control device 32, in this embodiment, the weft insertion control device 32 sets the above-mentioned setting values for each weft insertion condition according to the input rotation speed. It is assumed that an arithmetic expression for calculating is stored. In addition, the calculation formula includes, for each weft insertion condition, a set value (basic setting value) and a set rotation speed in the basic weft insertion condition as fixed values, and a basic set value depending on a ratio between the input rotation speed and the set rotation speed. Is set to be changed to a set value corresponding to the input rotation speed.

  Thereby, every time the input rotation speed from the drive control unit 34 is input as described above, the weft insertion control device 32 uses the calculation formula to set a set value corresponding to the input rotation speed for each weft insertion condition. Ask. In addition, the weft insertion control device 32 temporarily stores the determined setting values of each weft insertion condition, and controls the operation of each weft insertion-related device as described above according to the setting values.

  Thus, according to the drive control device 30 of the present embodiment, with regard to the weft insertion during the start-up period, in the operating state in which the spindle rotation speed is controlled according to the start rotation speed, each weft insertion according to the start rotation speed is performed. The weft insertion is executed by controlling the operation of each weft insertion related device according to the set value of the condition. Further, in an operation state in which the spindle rotation speed is controlled according to each intermediate rotation speed (calculated rotation speed), the operation of each weft insertion-related device is controlled according to the set value of each weft insertion condition corresponding to the calculated rotation speed. Insertion is performed. Thereby, weft insertion in the start-up period is performed under optimum weft insertion conditions according to each operation state, and each weft insertion is performed stably. When the calculated rotational speed calculated as described above matches the set rotational speed, the spindle rotational speed is controlled according to the set rotational speed, but in this operational state, the basic weft insertion condition Weft insertion is executed according to the basic setting value.

  In this embodiment, the setting value of the weft insertion condition corresponding to each operation state is calculated using a preset arithmetic expression. According to this, even when the set rotational speed or the basic setting value of the basic weft insertion condition is changed, the operator has to manually input the weft insertion condition corresponding to the starting rotational speed and the intermediate rotational speed for each change. Therefore, the burden placed on the worker in the setting work can be reduced.

  The embodiment of the drive control apparatus according to the present invention (hereinafter referred to as “the above-mentioned example”) has been described above by taking an air jet loom as an example of a presumed loom. However, the present invention is not limited to what has been described in the above embodiment, and can be implemented in another embodiment (modified example) as follows.

  (1) In the above-described embodiment, the present invention has been described using a loom with a set rotational speed of 1800 rpm as an example. However, the loom presupposed by the present invention is not particularly limited with respect to the set rotational speed, and the set rotational speed is set to be higher than 1800 rpm of the above-described embodiment, or is set to be low. Including. That is, the present invention is applied to the loom in consideration of the load applied to the spindle drive device at the time of start-up, and is not applied according to the set rotational speed. Therefore, the set rotational speed of the applied loom is There is no particular limitation.

  As described above, when the set rotational speed is high, the load increases to raise the spindle rotational speed up to the set rotational speed. The present invention is applied even when the rotation speed is lower (for example, 700 rpm). This is because, for example, in a loom where the opening device is driven by a driving motor and a large force is required to drive the frame in the opening device, the set rotational speed is low. Even when the rotational speed is set, the load at the start-up becomes large as in the case where the set rotational speed is high, and the spindle drive device is damaged due to the large load. This is because problems will occur.

  In addition, the starting rotational speed in the present invention is a rotational speed set based on the rotational speed set at that time in the loom that is required to apply the present invention as described above, and is lower than the set rotational speed. The rotation speed is equal to or less than the allowable rotation speed and set to 25% or more of the set rotation speed. Therefore, as a matter of course, the starting rotational speed is not limited to 1000 rpm in the above embodiment. For example, when the set rotational speed is 700 rpm and the allowable rotational speed is 500 rpm, the starting rotational speed is arbitrarily set between 175 rpm and 500 rpm (preferably closer to the upper limit).

  (2) With regard to the speed increase mode, in the above-described embodiment, the speed increase mode is determined to include the intermediate speed, and the speed increase amount toward the intermediate speed or the set speed is each increased. A uniform 200 rpm is set in each stage. However, in the present invention, even if the rotational speed increasing mode is determined to include the intermediate rotational speed as in the above-described embodiment, the rotation at each increase stage toward the intermediate rotational speed or the set rotational speed. The number increase amount is not limited to the setting as in the above embodiment, and can be arbitrarily set.

  For example, in the aspect of increasing the rotational speed, when the starting rotational speed and the set rotational speed are the same as in the above-described embodiment, first, the rotational speed is increased by 400 rpm from the starting rotational speed, and then increased by 400 rpm from the intermediate rotational speed (1400 rpm) after the increase. A mode in which the main shaft rotation speed is brought to the set rotation speed may be employed. In this case, the amount of increase in the rotational speed at each increase stage is the same as in the above-described embodiment, but the intermediate rotational speed in the rotational speed increasing mode is only one. Further, in the same case, the rotational speed increasing mode is to bring the main shaft rotational speed to the set rotational speed through three rising stages from the starting rotational speed, and the rotational speed in two of the three rising stages. An aspect may be employed in which the amount of increase in rotation is set to 300 rpm and the amount of increase in the remaining number of rotations is set to 200 rpm. That is, the amount of increase in the rotational speed at each rising stage is not limited to being set uniformly at all rising stages as in the above embodiment, but may be arbitrarily set at each rising stage.

  However, the amount of increase in the rotational speed is determined in consideration of the influence of the change in the rotational speed of the spindle when the spindle rotational speed is increased by the amount of the increase (to the extent that it does not adversely affect the weft insertion). It is set within the range of the increase amount. As described above, the set rotational speed is not particularly limited in the loom to which the present invention is applied, and the starting rotational speed is set based on the set rotational speed and the allowable rotational speed. Therefore, the rotational speed increase amount in the rotational speed increasing mode is determined based on the allowable increase amount and the range from the starting rotational speed at that time to the set rotational speed. It is determined based on how much the amount of increase is to be increased at each stage.

  (3) Further, with regard to the rotation speed increase mode, in the above-described embodiment, a frequency command signal for increasing the spindle rotation speed is predetermined in order to realize an increase in the spindle rotation speed according to the rotation speed increase mode. The set period described above is set so that it is output every period. Note that the setting period is set in consideration of the time required to increase the spindle rotational speed by the rotational speed increase amount (rising period) as described above. In addition, in the above-described embodiment, the setting period is set to 2 cycles, which is the shortest period for setting the cycle speed of the loom and includes the increase period for increasing the spindle speed by 200 rpm. .

  However, in the present invention, the rotational speed increasing mode is not limited to the setting period set to the shortest period as in the above embodiment. That is, the set period may be a period including the rising period and a period that is an integral multiple of the loom cycle. Therefore, for example, even when the rotational speed increase amount is 200 rpm as in the above-described embodiment, the setting period may be an arbitrary period longer than two cycles, which is the shortest period described above. However, if the set period is lengthened, the start period becomes longer by that amount, so the set period is set in consideration of the start period.

  Furthermore, the rotation speed increasing mode includes a plurality of intermediate rotation speeds as described above and includes a plurality of the above-described rising stages (including a plurality of setting periods), and all the setting periods are set to the same cycle number. It does not have to be. That is, in that case, the setting period of each rising stage in the start-up period is not limited to being set to the same number of cycles in all rising stages as in the above embodiment, but arbitrarily set in each rising stage. It is also good.

  Moreover, in this invention, a rotation speed raise aspect is not limited to a thing containing the setting period like the said Example. For example, the drive control device has a function of detecting the spindle rotation speed, and after the time when the frequency command signal is output, the rotation speed (command rotation speed) based on the frequency command signal and the detected spindle rotation speed (detection) The number of revolutions) is compared. In addition, the drive control device outputs the next frequency command signal at a predetermined timing (for example, when the crank angle reaches 0 °) after the time when the command rotation speed and the detected rotation speed match. Configure. And according to the structure, even if it does not set the setting period as mentioned above, it is possible to output a frequency command signal for every period according to the rotation speed increase amount.

  (4) Further, in the above embodiment, in order to realize the above-described rotation speed increase mode including the intermediate rotation speed, the rotation speed increase amount (200 rpm) is set and stored in the drive control unit. The number of rotations to be increased is calculated by using the amount of increase in the number of rotations. However, in the present invention, even if the rotation speed increasing mode includes the intermediate rotation speed as in the above embodiment, the rotation speed increase amount is set as in the above embodiment, and the intermediate rotation speed is obtained by calculation. The intermediate rotation speed itself assumed in the speed increase mode is stored in advance in the drive control unit (storage unit), and the next intermediate rotation number is selected at the time of output of the frequency command signal. It may be a technique such as.

  In this case, for example, the drive control unit stores the intermediate rotational speed in association with the number of cycles from the switching point, or outputs a frequency command signal based on the detected rotational speed as described above. By configuring the drive control device in this manner, a frequency command signal is output for each predetermined period. Further, in that case, the output of the frequency command signal corresponding to the set rotational speed after driving at the last intermediate rotational speed (or the intermediate rotational speed when there is one intermediate rotational speed) is also similar to the intermediate rotational speed. It should be done in. In that case, the intermediate rotational speed stored in the storage unit of the drive control unit corresponds to the drive set value referred to in the present invention.

  (5) Regarding the weft insertion during the start-up period, in the embodiment, the weft insertion control device is based on the set value of the basic weft insertion condition and the input rotation speed (start-up rotation speed or intermediate rotation speed) input from the drive control unit. The setting value of each weft insertion condition corresponding to the input rotation speed is calculated, and the weft insertion is performed by controlling the operation of each weft insertion related device according to each setting value.

  However, in the present invention, the setting values of the respective weft insertion conditions are not limited to the method in which the set values are obtained by calculation based on the input rotational speed as in the above-described embodiment, but the respective values corresponding to the starting rotational speed and the intermediate rotational speed The setting values for the weft insertion conditions are stored in advance in the weft insertion control device (memory unit) in the same way as the basic weft insertion conditions, and the setting values for each weft insertion condition are selected according to the input rotation speed input as described above. It is good as a technique of being done. Specifically, in an operation state in which the spindle rotational speed is controlled according to the starting rotational speed, set values for the respective weft insertion conditions corresponding to the starting rotational speed are selected at the start of starting. Further, in an operation state in which the spindle speed is controlled in accordance with the intermediate rotational speed, when the intermediate rotational speed is input to the weft insertion control device, setting values for each weft insertion condition corresponding to the intermediate rotational speed are selected. The

  However, as described above, the starting rotational speed is arbitrarily set within the range of 25% or more of the set rotational speed at that time and within the allowable rotational speed or less, so the set rotational speed at that time and the set starting speed are set. Depending on the number of rotations, when the difference between the set number of rotations and the starting number of rotations is small (for example, the set number of rotations as described above is 700 rpm, and the starting number of rotations is set to 500 rpm which is the allowable number of rotations). In some cases. Therefore, when the difference between the set rotational speed and the starting rotational speed is small and does not interfere with the weft insertion, the weft insertion during the starting period is determined according to the basic weft insertion condition according to the set rotational speed. You may make it carry out according to a setting value. That is, in the present invention, the weft insertion in the start-up period can be performed according to the set value of the basic weft insertion condition as long as the weft insertion is not hindered.

  (6) Regarding the speed increase mode In the above-described embodiment, the speed increase mode is determined to include the intermediate speed, and after the time when the spindle speed reaches the start speed, the start speed is increased. To the set rotational speed (through a plurality of rising steps) through an intermediate rotational speed. However, the rotational speed increasing mode of the present invention is not limited to such an embodiment including the intermediate rotational speed, that is, the spindle rotational speed from the starting rotational speed to the set rotational speed through a plurality of increasing steps as in the above-described embodiment. It is not restricted to the aspect which raises. Specifically, for example, when the difference between the set rotational speed and the starting rotational speed is small (set rotational speed: 700 rpm, starting rotational speed: 500 rpm), the range from the starting rotational speed to the set rotational speed is When it is within the range of the allowable increase amount described above, the rotation speed increase mode may be a mode that does not include the intermediate rotation speed. In that case, the rotational speed increasing mode is a mode in which the main shaft rotational speed is increased at a time from the starting rotational speed to the set rotational speed.

  (7) It should be noted that the present invention is not limited to the air jet loom described in the above embodiment, but can be applied to other plain looms such as a water jet loom and a rapier loom. The present invention is not limited to any of the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Air injection type loom 10 Weft insertion device 11 Yarn supply body 12 Length measuring storage device 12a Locking pin 12b Storage drum 13 Main nozzle 13a Electromagnetic switching valve 13b Pressure regulator 14 Sub nozzle 14a Electromagnetic switching valve 14b Pressure regulating device 15 Yarn supply cutter 16 Auxiliary main nozzle 16a Electromagnetic on-off valve 16b Pressure regulator 17 Weft yarn brake device 17a Braking member 17b Drive motor 18 Fluid supply source 19 ２０ 20 Main shaft 30 Drive control device 31 Main control device 32 Weft insertion control device 32a Storage device 33 Inverter 34 Drive Control unit 34a Storage unit 40 Input setting unit 50 Angle detector 60 Spindle drive 60a Driving motor

Claims (10)

In the loom in which the driving of the driving motor in the main shaft driving device that drives the main shaft is controlled so that the main shaft is rotationally driven during steady operation according to a preset number of rotations set in advance,
Start-up rotational speed set to a rotational speed lower than the set rotational speed, set to a rotational speed that is less than or equal to the rotational speed determined in consideration of the load on the spindle driving device, and set to 25% or more of the set rotational speed The rotation speed is preset,
In starting the loom from the start of the start until the main shaft rotation speed reaches the set rotation speed, the start is performed with a weft insertion in the start-up period of one or more cycles of the loom, and from the start of the start The driving motor is controlled according to the starting rotational speed, and the rotational speed of the main spindle is controlled according to a predetermined rotational speed increasing mode after the rotational speed of the main shaft reaches the starting rotational speed. A driving control method for a loom, wherein the driving of the driving motor is controlled so as to increase from the rotational speed to the set rotational speed. The rotational speed increasing mode is a state in which the main shaft is rotationally driven over one or more cycles of the loom at one or more intermediate rotational speeds defined as a rotational speed lower than the set rotational speed and higher than the starting rotational speed. The loom drive control method according to claim 1, wherein the loom drive control method is defined to include After determining the rotation speed increase mode so that the intermediate rotation speed is included, a rotation speed increase amount toward the intermediate rotation speed is set in the loom, and the rotation speed is increased from the start rotation speed to the set rotation speed. 3. The loom drive control method according to claim 2, wherein control of driving of the prime motor in the process of increasing is performed based on the rotation speed increase amount. A basic weft insertion condition that is a weft insertion condition for weft insertion during the steady operation is set in the loom in advance, and the weft insertion during the steady operation is performed according to the basic weft insertion condition,
In the starting period, weft insertion when the main shaft is rotationally driven according to the starting rotational speed and weft insertion when the main shaft is rotationally driven according to the intermediate rotational speed are determined according to the respective rotational speeds. 4. The loom drive control method according to claim 2, wherein the loom drive control method is performed according to conditions. The weft insertion conditions when the main shaft is rotationally driven according to the starting rotational speed and the weft insertion conditions when the main shaft is rotationally driven according to the intermediate rotational speed are based on the basic weft insertion conditions and the respective rotational speeds. The loom drive control method according to claim 4, wherein the loom drive control method is obtained by calculation. Each weft insertion related to the weft insertion to control the driving of the driving motor in the main shaft drive device that drives the main shaft so that the main shaft is driven to rotate in a steady operation according to a preset set rotational speed and to perform the weft insertion A loom drive control device for controlling the operation of the device,
Start-up rotational speed set to a rotational speed lower than the set rotational speed, set to a rotational speed that is less than or equal to the rotational speed determined in consideration of the load on the spindle driving device, and set to 25% or more of the set rotational speed A storage unit in which a drive setting value set in accordance with a rotation speed increasing mode set in advance to increase the rotation speed and the rotation speed of the main spindle from the start rotation speed to the set rotation speed is stored;
The driving of the prime motor and the driving of the driving motor so that the starting of the loom from the start of the starting of the loom until the rotational speed of the main shaft reaches the set rotational speed is performed with weft insertion in the starting period over one cycle of the loom Controlling the operation of each weft insertion-related device, and performing control of the driving motor from the starting start time according to the starting rotational speed, and after the time when the rotational speed of the spindle reaches the starting rotational speed, A drive control device for a loom, wherein the drive motor is controlled based on the drive set value so that the rotation speed of the spindle increases from the start rotation speed to the set rotation speed in accordance with the rotation speed increase mode. . The rotational speed increasing mode is a state in which the main shaft is rotationally driven over one or more cycles of the loom at one or more intermediate rotational speeds defined as a rotational speed lower than the set rotational speed and higher than the starting rotational speed. The loom drive control device according to claim 6, wherein the loom drive control device is defined to include The drive setting value is set so as to include a rotational speed increase amount toward the intermediate rotational speed after the rotational speed increasing mode is determined to include the intermediate rotational speed. Item 8. The loom drive control device according to Item 7. Basic weft insertion conditions, which are weft insertion conditions for weft insertion during steady operation, are set in advance in the loom, and weft insertion during steady operation is performed according to the basic weft insertion conditions,
In the start-up period, weft insertion when rotationally driving the spindle according to the startup rotational speed and weft insertion when rotationally driving the spindle according to the intermediate rotational speed are performed according to the weft insertion conditions determined according to the respective rotational speeds. The loom drive control device according to claim 7, wherein the loom drive control device performs the loom drive control device. The weft insertion conditions when rotating the spindle according to the starting rotational speed and the weft insertion conditions when rotating the spindle according to the intermediate rotational speed are calculated based on the basic weft insertion conditions and the respective rotational speeds. The loom drive control device according to claim 9, wherein the loom drive control device is obtained by:

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