JPH0673171U - Weft insertion device for loom - Google Patents

Abstract

(57) [Summary] [Object] It is an object of the present invention to provide a weft inserting device for a loom, which is provided with a weft pulling device by rollers, and in which weft insertion failure is prevented from occurring at startup. . [Structure] Length measuring storage device 10 and this length measuring storage device 10
A weft yarn pulling device 30 for pulling the weft yarn Y from the roller 33, 35, a switching device 50 for switching between pulling and non-pulling the weft yarn pulling device 30, and a switching device 50.
A weft inserting device of a loom having a posture control nozzle 71 for causing a weft Y drawn by the jet to fly into a warp row by a jet fluid, and at least when the weaving machine is started, an operating spindle angle of the switching device 50. Is provided with a control means 120 that gives an operation command differently from that during normal operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a weft inserting device for a loom, and more particularly to a weft inserting device for a loom, in which a weft pulling device for pulling a weft by a rotating roller is provided between a length measuring storage device and a posture control nozzle for ejecting fluid.

[0002]

[Prior art]

 Some looms are equipped with a weft inserting device that jets fluid from a nozzle to fly a weft and inserts the weft. This weft inserting device has an extremely excellent effect in terms of improving productivity because weft insertion can be performed at high speed with a fluid.However, for example, when jetting air to fly wefts, Since the weft is pulled by the frictional force with the weft, the amount of air consumed is large, and there remains a problem to be solved in terms of energy consumption.

Therefore, as a weft insertion device that saves air consumption, there is an invention described in, for example, Japanese Patent Laid-Open No. 57-19984. In the present invention, a pair of rotating rollers are provided so as to be freely contactable and separable, and both rollers hold and pull the weft so that the air consumption can be significantly reduced at the initial stage of weft insertion, particularly when air consumption is large. It has become.

[0004]

[Problems to be solved by the device]

 As described above, since the weft pulling device that pulls the weft by the rotating roller and inserts the weft actively by directly pulling the weft out by the roller and bears the pulling resistance, the attitude control nozzle that jets the fluid does not However, it is only necessary to control the attitude of the weft thread, so it is very advantageous in that air consumption can be reduced and energy consumption can be reduced.

However, the weft inserting device that pulls the weft by the above-mentioned rollers has various problems at the time of starting. That is, in the loom, each actuator operates based on the angle signal from the angle sensor of the main shaft. Further, at the time of start-up, the rotational speed of the main shaft goes through a transient rotational speed in which the rotational speed gradually changes from low-speed rotation to high-speed rotation, and then becomes the rotational speed during normal operation after one or two rotations. Therefore, during this transient rotation, if each actuator is operated with the same spindle angle as in normal operation, the operation time will be longer than in normal operation.

On the other hand, with respect to the operation of each actuator as described above, it takes a little time for the roller rotation speed to reach a predetermined rotation speed, so at the time of start-up, the roller rotation speed is maintained at a predetermined rotation speed. The applicant first proposed the device to be stored. According to this, even at the time of starting, the flying speed of the weft becomes the same as that at the time of normal operation.

From the above-mentioned relationship, the weft inserting device for pulling the weft by the roller is operated by the roller rotating at a constant speed regardless of the rotation speed of the main spindle and the angle signal of the main spindle, that is, the rotation speed of the main spindle. Is low, the actuator has a relatively long operating time.

With the above-described structure, when the loom is started, for example, although the shedding speed of the warp is slow, the weft pulling device using the rotating roller pulls the weft at the same speed as in normal operation. The weft may fly at a speed during normal operation before it is fully opened, and the weft may come into contact with the warp to cause weft insertion failure.

Therefore, an object of the present invention is to provide a weft-inserting device for a loom, in which a weft-pulling device using rollers is provided, which prevents occurrence of weft-insertion failure at the time of starting.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a length measuring storage device, a weft pulling device that holds a weft from the length measuring storage device by a pair of rollers, and pulls the weft yarn. Alternatively, a weaving machine having a switching device for switching between release and release and a posture control nozzle for holding the weft yarn between rollers by the operation of the switching device and pulling the weft yarn into the warp row by jetting fluid to insert the weft yarn The weft inserting device is characterized in that it has a control means for instructing an operation at the time of starting the loom by making at least the operation main shaft angle of the switching device different from that during normal operation.

[0011]

[Action]

 At the time of starting the loom, there is a transitional rotation timing in which the rotation speed of the main spindle gradually changes from low to high, but the control device causes the switching device to change the operating spindle angle different from that during normal operation depending on the delay in the warp shedding speed at this time. Since the operation command is issued by, the weft yarn is pulled by the rotating roller when the warp yarn is sufficiently opened, and weft insertion failure is prevented.

[0012]

【Example】

 Hereinafter, the present invention will be described by way of examples with reference to the drawings. FIG. 1 is an explanatory plan view showing the structure of an embodiment of the present invention, FIG. 2 is a perspective explanatory view showing the same structure, FIG. 3 is a side view explanatory view of the same main part (weft pulling device), and FIG. Is a plan view of the main part (weft pulling device and switching device) as seen from the direction of arrow A in FIG. 2, FIG. 5 is a perspective view of the main part (weft braking device), and FIG. Fig. 7 is an operation time chart of each actuator during the operation of the loom.

A weft inserting device E for a loom according to an embodiment of the present invention comprises a length measuring and storing device 10 and a weft yarn tow that holds the weft yarn Y from the length measuring and storing device 10 between a pair of rollers 33 and 35 and pulls the weft yarn. The device 30, a switching device 50 for switching between pinching or releasing of the rollers 33, 35 of the weft pulling device 30, and the weft Y being held by the rollers 33, 35 by the operation of the switching device 50 to be pulled and ejected. A weft inserting device of a loom having a posture control nozzle 71 for inserting a weft Y into a warp row by means of a weft yarn, and at least when the weaving machine is activated, at least the operating spindle angle of the switching device is different from that during normal operation. It is characterized by having a control means for giving an operation command.

Therefore, at the time of starting the loom, the roller can pull the weft when the warp is sufficiently open, as in the normal operation.

Next, the configuration of this embodiment will be described. Although the present embodiment is provided with the A and B color weft inserting devices, since both weft inserting devices have the same configuration, the overall configuration and the operation timing at the time of starting will be described mainly with the A color weft inserting device. The operation timing during normal operation will be described mainly with the B color weft inserting device. The same reference numerals are given to the same parts.

The weft inserting device includes a weft measuring and storing device 10 for measuring and storing the weft Y supplied from the yarn feeder 1, a yarn guide 21 for guiding the weft Y from here, and a yarn guide 21. It is provided between the weft pulling device 30 for sandwiching and pulling the weft Y from 21 by a roller and releasing it, and between the weft pulling device 30 and the yarn guide 21, and switching between pulling and non-pulling of the weft Y of the weft pulling device. By switching the switching device 50 and the switching device 50, a yarn guide 23 that guides the weft Y drawn by the weft drawing device 30 and a weft Y from the yarn guide 23 can be freely attached to and detached from the weft Y. A weft braking device 60 that imparts running resistance, and a fluid ejection device 70 that causes the weft Y from the weft braking device 60 to fly while controlling the attitude of the weft Y by air ejection. And a cutter device 80 provided in the vicinity of the fluid ejecting device 70, a weft arrival sensor 100 provided on the side opposite to the weft insertion side, and a control device 120.

To explain each device in detail, the weft measuring and storing device 10 includes a main body 12 having a drum 11. A winding arm 13 is rotatably supported on the main body 12 and is rotationally driven by a motor in the main body 12. The weft Y passes through the winding arm 13 and is wound around the peripheral surface of the drum 11 and stored by the rotation of the winding arm 13. The stored weft yarns Y extend toward the yarn guide 21 while being locked by the locking claws 14 inserted into the outer circumference of the drum. The locking claw 14 is attached to an electromagnetically driven self-returning weft insertion solenoid 15, which is retracted by energizing and disengages from the peripheral surface of the drum 11 to unlock the weft Y and deenergize. The weft insertion is completed by moving forward with spring force to prevent the weft Y from unwinding. It should be noted that this energization deactivation is operated by a signal from the control device 120. As shown in FIG. 2, the yarn guide 21 to the braking device 60, which will be described below, are mounted on a fixed base 26 extending outward from the side frame 25.

Each of the yarn guides 21 and 23 has a large diameter on the length measurement storage device 10 side, and is formed so as to have a smaller diameter toward the downstream where the weft Y travels. The weft Y is guided to the position.

The weft pulling device 30 is attached to the vertical wall 27 of the fixed base 26 as shown in FIG. That is, a motor 31 of the weft pulling device 30 is fixed to the vertical wall 27, and an output shaft of the motor 31 is connected to a drive shaft 32 protruding toward the front side of the vertical wall 27 in FIG. Two metal rollers 33 having a large diameter and having a cylindrical shape are fixedly mounted on the drive shaft 32 with screws 34 at predetermined intervals in the axial direction of the drive shaft 32. A rubber roller 35 having a small diameter is arranged above each roller 33. The small-diameter roller 35 includes a metal cylindrical core body 37 rotatably attached to a free end portion of an arm 36 whose base end portion is swingably attached to the vertical wall 27, and a core body 37. And a rubber layer 38 joined to the peripheral surface of the roller, and is urged toward the large-diameter roller 33 side by a tension spring 39 spanning the vertical wall 27 and the arm 36. When the weft Y is sandwiched between the rollers 33 and 35, the weft Y is pulled and released to be in a non-pulled state.

FIG. 3 shows the power transmission of the pair of rollers 33 and 35 in the weft pulling device 30. In the pair of rollers 33 and 35 of the weft pulling device 30, the peripheral surface of the large diameter roller 33 and the peripheral surface of the small diameter roller 35 are brought into pressure contact with each other, so that the driving force of the roller 33 rotationally driven by the motor 31 becomes It is transmitted to the roller 35 and is rotated in the opposite directions at the same peripheral speed. The weft yarn contact rubber layer 40 of the portion of the small-diameter roller 35 that comes into contact with the weft yarn Y is made of a soft rubber such as urethane rubber to increase the frictional force with the weft yarn Y. Further, a taper is formed between the rollers 33, 35 by a switching device 50, which will be described later, so that the weft Y can easily enter and exit.

Although the two rollers 33 are configured to be driven by the single motor 31 in this embodiment, they may be configured to be rotationally driven separately by using the two motors. Further, the rollers 33 and 35 may be separately driven to rotate. The outer diameters of the rollers 33 and 35 may be different according to the weft Y.

The switching device 50 includes a switching solenoid 51 that is a rotary solenoid. The switching solenoid 51 is energized by electric power supplied to a solenoid (not shown) to rotationally drive the output shaft in one direction, and when deenergized, the spring 55 causes the output shaft to rotate in the opposite direction by elastic force. It is an electromagnetically driven self-returning type that self-returns and is attached to the bottom wall 28 of the fixed base 26. A traverse lever 52 is fixedly attached to the output shaft located above the switching solenoid 51. The tip of the traverse lever 52 extends near the contact surface between the rollers 33 and 35. The extending end of the traverse lever 52 is bent upward, and the extending end of the traverse lever 52 bent upward is formed with a yarn guide hole 53 through which the weft Y is inserted.

In FIG. 4, the weft Y from the yarn feeder 1 side is drawn between the pair of rollers 33 and 35 of the weft pulling device 30 by the operation of the traverse lever 52 of the switching device 50, or The state where the rollers are pulled out from between the rollers 33 and 35 is shown. In FIG. 4, when the traverse lever 52 of the switching device 50 is stopped at the release position shown by the solid line by the self-return by the spring 55 of the switching solenoid 51, the weft Y is displaced from the path. Then, it is pulled out from between the rollers 33 and 35 to be in a non-pulled state. When the switching solenoid 51 is urged to move from the released position to the retracted position indicated by the virtual line, the weft Y returns to the path and is retracted between the rollers 33 and 35 to be in the retracted state. Further, the end face side where the weft Y is put in and out of the both rollers 33 and 35 is formed in a tapered shape as described above, which facilitates the switching of the weft Y. The position where the weft Y is drawn is referred to as a path Y1 and the release position is referred to as a displacement path Y2.

Next, the weft braking device 60 is provided in the vicinity of the downstream side of the yarn guide 23, and is equipped with a bracket 62 mounted on the fixed base 26 and an electromagnetic drive mounted on the bracket 62. From the brake solenoid 63, which is a self-returning rotary solenoid, the rod-shaped actuator 64 attached to the output shaft of the brake solenoid 63, and the yarn guide 23 provided in the vicinity of the actuator 64. It is configured. The bracket 62, the brake solenoid 63, and the actuator 64 constitute the brake actuating means 61, and the yarn guide 23 constitutes the pressure-contacting body.

When the brake solenoid 63 does not receive a signal from the control device 120, that is, when it is not electromagnetically driven, the actuator 64 is rotated by a spring (not shown) as shown in FIG. Is displaced from the path Y1 to the displacement path Y2, and the weft Y is pressed against and slid on the peripheral edge of the yarn guide 23 as a pressure-contacted body, thereby imparting running resistance to the weft Y. When the brake solenoid 63 is biased and rotated by a signal from the control device 120, the actuator 64 is separated from the weft Y and the weft Y is released. The weft braking device 60 may be provided in the vicinity of the upstream side of the yarn guide 23.

The fluid ejecting apparatus 70 includes an attitude control nozzle 71 and a plurality of sub nozzle groups 72 provided along the reed 3. The air supply path 73 of the attitude control nozzle 71 is provided with a main pressure tank 76 connected to a pressurized air supply source 74 via a pressure reducing valve 75. An attitude control nozzle 71 is connected to the discharge side of the main pressure tank 76 via an electromagnetically driven self-reset type on-off valve 77. Then, the on-off valve 77 is biased and opened by a signal from the control device 120, and is closed by being deenergized, so that the air is injected and stopped. By this injection, the weft Y pulled by the weft pulling device 30 flies to the opposite weft insertion side while controlling the posture.

Further, a plurality of sub-nozzle groups 72 for weft insertion are arranged on the weave front side of the reed 3 of the loom. Although not shown, the air supply path of the sub-nozzle group 72 is provided from the pressurized air supply source 74 side to the plurality of sub-nozzle groups 72, and a plurality of electromagnetically driven self-recovery corresponding to the relief valve, the constant pressure tank, and the sub-nozzle group 72. A mold on-off valve is provided in that order. The plurality of on-off valves in the air supply path of the sub-nozzle group 72 are sequentially opened from the weft insertion side to the anti-weft insertion side with a predetermined opening / closing period in response to an output signal from the control device 120. By opening and closing the plurality of on-off valves, the plurality of sub-nozzle groups 72 relay-inject the pressurized air so as to follow the flying tip of the weft Y 2, and from the weft-inserted side of the pressurized air from the sub-nozzle group 72. By relay jetting to the side opposite to the weft insertion side, the weft yarn Y flies through the air guide (not shown) formed in the reed 3 in the warp yarn opening and is inserted.

The cutter device 80 is provided with a cutter 81 fixedly provided on the cloth fell side of the weft inserting side and attached to extend in the front-rear direction, and an electromagnetically driven self-drive device for rotationally driving the lower blade of the cutter 81. It is composed of a cutter solenoid 82 which is a return type rotary solenoid and cuts the beating yarn Y which has been beaten.

On the other hand, a weft arrival sensor 100 is provided on the opposite side of the warp row (not shown) as the detection means for detecting the arrival timing of the weft Y that has been inserted. The output signal of the weft arrival sensor 100 and the output signal of the angle sensor 6 that detects the rotational angle position of the loom main shaft 5 are input to the control device 120. The control device 120 replaces the output signal input time of the weft arrival sensor 100 with the rotation angle position from the angle sensor 6, and sets the detection arrival timing of the replaced rotation angle position and the control device 120 in advance as a reference value. The difference from the set arrival timing is calculated, and the difference is corrected to the swing timing (traverse timing) of the traverse lever 52 in the switching device 50, and the corrected swing timing as the correction command is used in the preparation work for the loom operation. It is fed back to the set swing timing of the traverse lever 52 obtained from the loom rotation number and the weaving width input by the operator, and the power supply time (period) from the power source (not shown) to the switching solenoid 51 is controlled, The stop time of the traverse lever 52 in the towing position is controlled.

The control device 120 includes a loom body control device 121, a weft selection command device 122, an actuator drive command generation device 123, and an inverter device 124. The respective devices 121, 122, 123 are electrically connected to each other, and the angle signal of the angle sensor 6 attached to the main shaft 5 of the loom is directly transmitted to the main body control device 121 of the loom, the weft selection command device 122, Since they are input to the actuator drive command generator 123, the loom body controller 121, the weft selection command device 122, and the actuator drive command generator 123 are independently operated by the angle signal of the angle sensor 6. To operate.

Although not shown, the loom main body control device 121 includes a control unit, an arithmetic unit, a storage unit, and an input unit for manually inputting setting values and the like, and is not shown. It is connected to a host computer that manages multiple looms. Then, a loom operation signal is issued to control the start and stop of the main motor 7 of the loom and the inverter 124 of the motor 31 of the weft pulling device 30, which will be described in detail in a time chart.

The preparation button 121a is first pressed when starting the loom and is connected to the control unit. By pressing this, the control unit takes time, for example, to reach a normal rotation speed. The start of the inverter 124 of the motor 31 and the start of operation of the timer 121d described later are instructed. The start-up button 121b is connected to the above-mentioned control unit, and is a button to be pressed after the motor 31 reaches the normal rotation, the timer 121d is closed, and the loom start preparation completion signal is output. The main motor 7 of the loom is started by pressing 121b. The stop button 121c is a button that is pressed when stopping the loom, and can be pressed at any time as necessary.

Further, the above-mentioned timer 121d is interposed between the control unit (not shown) and the driver 7a of the main motor 7. The timer 121d is in a switch closed state at a position where the set time is 0, and is in a switch opened state after the time is set and until the set time passes. When the preparation button 121a is pressed, the control unit instructs the inverter 124 to start driving the motor 31, and at the same time, starts the operation of the timer 121d in which a predetermined time is set in advance. Then, after a predetermined time has passed, the timer 121d is closed. Then, by pressing the start button 121b, a start signal from the control section is input to the driver 7a to start the loom, and the loom main body control section 121 causes the weft selection command device 122 and the actuator drive instruction generation device 123 to start operation. Output a signal.

The predetermined time is the time required for the roller 33 to reach the optimum rotation speed for weft insertion. The preparation button 121a, a control unit (not shown), and a timer 121d constitute a roller advance driving means 121A, and the timer 121d constitutes a start temporary blocking means 121B.

The weft selection command device 122 indicates to the actuator drive command generation device 123 the weft yarn to be used for the next weft insertion according to the sequence programmed in advance in the case of multicolor weaving. When the color is on the A side and the other color is on the B side, the actuator drive command generator 123 is instructed that the next weft insertion is, for example, the A color. This A-color instruction has already been output in advance about 300 degrees in the previous cycle at the spindle angle, and when it reaches 300 degrees, for example, the B-color specification is output as the weft thread in the next cycle. . There are various order of this color, such as ABB, ABB, ..., AAB, AAB ,. The preceding output is for preventing malfunction due to response delay from the selection of the weft thread to the operation of each actuator.

Although not shown, the actuator drive command generator 123 includes a control unit, a storage unit, a calculation unit, and the like, and the storage unit stores the operation timing of each actuator at the time of startup and the normal operation. The operation timing of each actuator at this time is manually input, for example. Then, for example, if the loom is started at a main shaft angle of 300 degrees, each actuator is sequentially driven through the driver according to the operation timing at the time of start until the next 300 degrees after exceeding 360 degrees, that is, until the main spindle makes one rotation. The actuators are actuated, and each actuator is sequentially actuated via the driver according to the signal of the angle sensor at the actuation timing of normal operation from the second rotation exceeding 300 degrees. It should be noted that the number of rotations at the time of startup can be appropriately changed and input.

The actuator drive command generator 123 includes the above-mentioned storage means at the time of startup, which is configured by the control section, the storage section, the arithmetic section, etc., the setting storage means, the length measurement storage device 10 at the time of startup, and the posture A control nozzle 71 and a startup control means for operating the switching device 50 are provided. Each operation time chart will be described later.

The main drivers are: the driver 15a is for activating the locking claw 14 on the A side, and the driver 15b is for operating the locking claw 14 on the B side. Similarly, the driver 51a operates the A side traverse lever 52, the driver 51b operates the B side traverse lever 52, the driver 77a operates the A side opening / closing valve 77, and the driver 77b operates the B side opening / closing valve 77. The driver 82a for operation is for operation of the cutter 81. In the case of multicolor weaving, each driver is selectively operated according to the weft thread selected in advance.

Next, the operation of this embodiment will be described with reference to the time chart of FIG. 7. First, the case of normal operation will be described, and then the case of startup will be described. This figure is a diagram in which the horizontal axis shows the rotation angle of the main shaft 5 and the vertical axis shows the operation contents. From 0 degree at the left end to 0 degree in the center, the starting time by A side weft insertion is shown, and from the center 0 degree. Up to the right end of 0 degrees, the case of normal operation with weft insertion on the B side is shown.

In the description of this embodiment, a multicolor weaving machine in which wefts on the A side and B side are alternately inserted is shown. The case of operation will be described on one side B, but regarding the operation of each actuator at the time of startup on the side A, which will be described later, the description of the same parts as on the side B will be omitted.

The main operation contents provided on the vertical axis will be described. The loom start preparation signal is output when the preparation button 121a is pressed, and is turned on during the loom operation. The loom operation signal is output when the start button 121b is pressed and is turned on during the operation of the loom. The low speed reversing signal for the loom causes the main shaft to rotate in reverse at a slow speed when the machine is stopped due to poor weft insertion. The weft insertion abnormality signal is a signal output when the weft arrival sensor 100 does not detect the weft Y, and a stop signal is output when the weft insertion failure has occurred and the loom is stopped, but a detailed description thereof will be omitted. The roller rotation command signal is output when the preparation button 121a is pressed, the roller 33 is rotationally driven, and is turned on during operation. The loom start permission signal is turned OFF while the loom start is blocked, that is, while the timer 121d is operating and the switch is open, and when the timer 121d is closed and conductive, that is, the rotation speed of the roller 33 reaches the set value. When the loom is in operation, it turns ON when the machine is ready to start, and turns ON when the loom is operating.

When the signal is OFF, the weft thread locking pawl 14 is inserted in the peripheral surface of the drum 11 to lock the weft thread, and when ON, it is pulled out from the peripheral surface of the drum 11 and is being unwound. With respect to the rule 71, ON is injecting, OFF is stopping (only slight breeze injection), ON of the cutter 81 is cut off, OFF is open, and the traverse lever 52 is ON towing, OFF is not The weft brake 60 is being towed, ON is being released, OFF is being controlled, and the color command is ON for command and OFF for command stop.

In the time chart of the weft B side in FIG. 7, in the state slightly before reaching the time when the rotation angle of the main shaft 5 hits 0 degrees, the tip of the weft Y reaches the counter weft insertion side. At this point in time, the weft-locking pawl 14 is in a state in which the weft Y is locked, and the attitude control nozzle 71 is not jetting (only a slight breeze jet). Further, although the rollers 33 and 35 of the weft pulling device 30 are rotating, the weft Y is on the displacement path Y2 and is released (non-pulling state). That is, the traverse lever 52 is in the OFF non-pulling state, while the weft brake 60 as the braking device is OFF.

Then, immediately after the rotation angle of the main shaft 5 has passed 0 degrees and the beating is finished, the cutter device 80 on the weft insertion side is activated to cut the weft Y. When the angle of the main shaft 5 reaches 60 degrees, the posture control nozzle 71 starts jetting, but the weft Y does not fly. Subsequently, the locking claw 14 releases the weft Y, and when the weft Y starts to fly by the above-mentioned jetting, the weft break 60 is immediately released, and at the same time, the traverse lever 52 of the switching device 50 is actuated to cause the weft Y to fly. It is moved to the traveling route Y1, is sandwiched by the rollers 33 and 35, and flies to the side of inserting the weft at a predetermined flying speed (pulling state). Then, the weft Y is sent to the side opposite to the weft inserting side while the posture is controlled by the relay jets of the posture control nozzle 71 and the sub nozzle 72. Then, when the unwinding sensor provided in the vicinity of the locking claw 14 detects the predetermined number of unwinding turns, the locking claw 14 is immediately inserted into the peripheral surface of the drum 11. After approximately one winding, the weft Y is substantially locked and the weft insertion is completed.

Although the locking claw 14 is inserted into the peripheral surface of the drum 11 by the signal of the unwinding sensor, it may be inserted at a predetermined main axis angle without using the unwinding sensor. Before the weft yarn Y is actually locked, the traverse lever 52 switches the weft yarn Y to the displacement path Y 2 and releases it to the non-pulling state, and at the same time, the weft brake 60 enters the operating state. Then, when the weft Y is actually locked by the locking claw 14, a peak tension is generated, but this peak tension is greatly increased by the operation of the weft brake device 60 that is optimally adjusted for a predetermined flying speed. Very low tension. On the other hand, the arrival of the weft Y is detected by the weft arrival sensor 100, and a detection signal is input to the control device 120.

Next, the operation of each part at the time of startup will be described with reference to the operation time chart on the left side (A side) in FIG. As described above, the operation time chart of this embodiment shows that the main spindle rotation speed at start-up and the main spindle rotation at normal operation are set so that each device can operate at the same time as during normal operation even at start-up. The operating angle at start-up is calculated from the speed ratio, and this is corrected by actual operation. In this figure, the operating angles of the locking claw 14, the attitude control nozzle 71, the traverse lever 52, and the weft brake device 60 are changed for starting, and the two-dot chain lines on both sides of the operating angle indicate normal operation. This is the part that shows the operating angle of time. In this embodiment, the starting spindle angle is set to 300 degrees.

Although various procedures can be considered for setting the operating time at startup, in this embodiment, the operating angle of the locking claw 14 is also different from that during normal operation. I set it first. That is, in order to effectively use the warp opening timing, the operating angles are set on both sides of the maximum opening position, and the operating angle (the timing at which the locking claw 14 comes off the drum 11 peripheral surface) is about 90 degrees. Has reached 190 degrees. That is, the timing for removing the locking claw 14 from the peripheral surface of the drum 11 is delayed as compared with that during normal operation. Next to the locking claw 14, the operating angle of the attitude control nozzle 71 and the operating angle of the sub-nozzle group 72 are determined. The relative position with the locking claw 14 is temporally equivalent to the relative position during normal operation. It is set so that

The operating angle of the traverse lever 52 is also calculated as described above, but in particular, the relationship with the locking claw 14 is that the locking claw 14 comes off the peripheral surface of the drum 11 to unwind the weft Y. After that, the weft Y is towed, and the locking claw 14 is set so as not to be pulled before the weft Y is locked. Also, the weft brake 60 is calculated in the same way, but the weft brake 60 is set so as to maintain the same temporal relative relationship with the traverse lever 52 as in the normal operation.

The operation timing of each part will be described in detail. The main shaft rotation speed during normal operation is input by the above-mentioned input device (not shown) of the loom body control device 121. Next, the timing of releasing the pawl 14 (angle of the main shaft) at the time of start-up and at the time of normal operation is set, and is stored in the storage unit of the actuator drive command generator 123 via the input means (not shown). The spindle angle to be set is obtained as an operating angle of the spindle during normal operation, which is an experience value when the spindle is operating properly, and the operating angle of the spindle at start-up is the rotational speed of the spindle during normal operation. From the ratio with the rotation speed of the spindle at start-up, calculate the working angle of the spindle, which corresponds to approximately the same time as during normal operation.

Also in the case of the attitude control nozzle 71, similarly, an empirical value is obtained for the injection operation angle during normal operation, and the injection operation angle is calculated and set so as to have the same time as during normal operation at startup. To do.

[0051]

[Effect of device]

 At the time of starting the loom, there is a transitional rotation timing in which the rotation speed of the main spindle gradually changes from low to high, but the control device causes the switching device to operate differently from the normal operation depending on the delay in the warp shedding speed. Since the command is to operate at an angle, the weft thread is pulled by the rotating roller when the warp thread is fully opened, and weft insertion failure can be prevented.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory perspective view showing the same structure.

FIG. 3 is a side view explanatory diagram of the same main part (weft pulling device).

FIG. 4 is an explanatory plan view of main parts (weft pulling device and switching device) as seen from the direction of arrow A in FIG.

FIG. 5 is a perspective explanatory view of a main part (weft braking device) of the same.

FIG. 6 is an explanatory view of the operation of the main part (weft braking device) of the same.

FIG. 7 is an operation time chart of each actuator during the operation of the loom.

[Explanation of symbols]

 Y Weft 10 Length measuring storage device 30 Weft pulling device 33, 35 Roller 50 Switching device 71 Attitude control device 120 Control device

Claims (1)

[Scope of utility model registration request] 1. A length measuring storage device, a weft pulling device that holds and pulls a weft from the length measuring storage device with a pair of rollers, and a switching device that switches between holding and releasing a roller of the weft pulling device. A weft inserting device for a loom, which has a posture control nozzle for holding the weft yarn between rollers and pulling it by the operation of this switching device, and causing the weft yarn to fly into the warp row by the jetting fluid for weft insertion. A weft-inserting device for a loom, characterized in that at least a control means for issuing an operation command by making at least the operating spindle angle of the switching device different from that during normal operation is provided.