JPH0813287A - Weft-insertion apparatus of loom - Google Patents

Abstract

PURPOSE:To provide a weft-insertion apparatus of a loom having a device to draw a weft with a constantly rotating roller and free from troubles of weft-insertion miss and yarn breakage even by increasing the operation speed of the loom. CONSTITUTION:This weft-insertion apparatus of a loom is provided with a weft-drawing device 30 to clamp and draw the weft Y supplied from a length- measuring and storing device 10 with constantly rotating rollers 35, 33, a switching device 50 to switch the weft between a drawn mode and an undrawn mode by clamping the weft Y with the pressing part of the rollers 35, 33 of the weft drawing device 30 or releasing the weft from the pressing part and a posture-controlling nozzle 71 to shoot the drawn weft Y. The switching device 50 switches the weft path by ejecting a fluid against the weft Y.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft inserting device for a loom, and more specifically, a weft yarn is pulled by a rotating roller between a length measuring storage device and an attitude control nozzle for jetting a fluid to fly the weft yarn. The present invention relates to a weft inserting device for a loom provided with a weft pulling device.

[0002]

2. Description of the Related Art Some looms are equipped with a weft inserting device for injecting a fluid from a nozzle to fly a weft and insert 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, but for example, when jetting air to fly wefts, Since the weft is pulled by the frictional force with the weft, the air consumption is large, and there remains a problem to be solved in terms of energy consumption.

Therefore, in order to reduce the consumption of air, a pair of rollers are provided between the length measurement storage device and the attitude control nozzle (fluid jet nozzle) so that they can come into contact with and separate from each other, and the weft yarn is rotated by both rotating rollers. A weft inserting device that has been sandwiched and pulled has been developed. In this way, the weft inserting device that pulls the weft with the rotating roller positively pulls the weft out directly with the roller and sends it out, and the roller bears the pulling resistance. Therefore, the attitude control nozzle only controls the attitude of the weft. Good. Therefore, in the initial stage of weft insertion, which consumes a large amount of air, the air consumption is significantly reduced, and the weft insertion device is also very excellent in terms of energy saving.

As the above-mentioned excellent weft insertion device, Japanese Patent Laid-Open No.
The invention described in Japanese Patent Laid-Open No. 136237 is known. As described above, according to the present invention, the weft pulling device for sandwiching and pulling the weft by the pair of rotating rollers is provided between the length measurement storage device and the attitude control nozzle for ejecting fluid. The device is composed of one roller whose rotation is controlled by using a servo motor and the other roller which is press-contacted to and separated from one roller by an electromagnetic plunger. It is designed to be detached (towed or not towed). And
By controlling the rotation of one roller in synchronization with the rotation of the main shaft, the weft is clamped at a low speed at the start of weft insertion, is driven at a high speed during the weft insertion, and is returned to the low speed at the time of disengagement. As a result, the traction efficiency is increased in response to the increase in the speed of the loom, and the accident such as the weft breakage is prevented.

In the above-mentioned conventional example, since the rotation of the roller is controlled for each cycle of the loom, there is a problem in the followability to cope with the further increase in the speed of the loom, and it is extremely difficult. It requires an advanced control device and is considered to be extremely difficult to put into practical use. Therefore,
The applicant has provided a pair of rollers which are constantly in pressure contact with each other in order to enable the loom to be speeded up by an inexpensive means,
A weft insertion device has been developed in which wefts are put in and taken out of the pressure contact portion between the rollers by a traverse lever to switch between pulling and non-pulling of the wefts (JP-A-5-27203).
4). In this weft inserting device, it is not necessary to move the roller, and the roller is always rotated at high speed, so that the weft feeding speed can be easily adapted to the high speed of the loom.

[0006]

However, in the case where the traverse lever moves the weft yarn into and out of the pair of rollers, when the traverse lever starts to swing, the weft yarn located between the rollers starts to swing due to inertia. Since the movement starts a little later than the movement, when the loom speed is further increased, weft insertion failure may occur due to the difference in the timing of switching between weft pulling and non-pulling, especially from the weft roller. If there is a delay in the release of the yarn, there is a risk that thread breakage may occur.

Therefore, an object of the present invention is to provide a weft inserting device for a loom, which is provided with a weft pulling device by means of a constantly rotating roller, and which does not cause weft insertion failure or weft breakage even if the loom is sped up. To do.

[0008]

In order to achieve the above object, the present invention provides a length measuring and storing device, a weft pulling device for pulling the weft from the length measuring and storing device by a roller which constantly rotates, and the weft pulling device. A weaving machine having a switching device that switches between pulling and non-pulling by the roller of the device, and a posture control nozzle that causes the weft yarn pulled by the roller by the operation of the switching device to fly into the warp shed by fluid ejection and insert the weft. The weft-inserting device is characterized in that the switching device has a fluid ejecting means for ejecting a fluid onto the wefts to perform switching.

Another aspect of the present invention is to provide a length-measuring storage device, a weft-pulling device that pulls a weft from the length-measuring-storage device with a roller that constantly rotates, and towing or not pull the weft-pulling device by the roller. A weft inserting device for a loom, comprising: a switching device for switching and a posture control nozzle for performing weft insertion by causing a weft yarn pulled by a roller by the operation of the switching device to fly into a warp yarn opening by fluid ejection. The device includes a guide portion of the weft, a drive portion of the guide portion that moves the weft path by moving the guide portion, and switches the weft yarn between pulling and non-pulling by a roller, and after the switching operation by the driving means, The auxiliary means for assisting the movement of the weft path by injecting a fluid to the side of the weft path.

[0010]

In the present invention, since the weft yarns are moved and switched by jetting the fluid, the response can be greatly improved. Therefore, it is possible to obtain a high-speed loom without the risk of weft insertion failure or weft breakage.

According to another aspect of the invention, the weft is moved by moving the guide portion of the weft of the switching device, and at the same time, the portion delayed in movement due to inertia of the weft,
Since the force is moved to the weft path after the switching by the fluid injection, the delay of the switching due to the inertia of the weft can be surely removed. Therefore, the switching responsiveness can be greatly improved, and a high-speed weaving machine that is free from weft insertion failure and weft breakage can be obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention and other inventions will be described below with reference to the accompanying drawings. An embodiment of the present invention will be referred to as a first embodiment, and an embodiment of another invention will be referred to as a second embodiment. FIG. 1 is an explanatory plan view showing an overall configuration of the first embodiment, FIG. 2 is a perspective explanatory view thereof, FIG. 3 is a plan view explanatory view of an essential part (switching device), and FIG. 4 is an essential part (fluid). 5 is a perspective view showing the overall construction of the second embodiment, FIG. 6 is a perspective view showing the same, and FIG. 7 is a plane view showing the same main part (switching device). 8, FIG. 8 is a front view explanatory diagram showing the same main part (switching device), FIG. 9 is a plan view explanatory diagram explaining the same action, FIG. 10 is a plan view explanatory diagram explaining the same action, and FIG. 11 is the same action. FIG. 12 is a plan view explanatory diagram for explaining the operation, FIG. 12 is a plan view explanatory diagram for explaining the same operation, FIG. 13 is an operation time chart of each actuator during the loom operation of the first and second examples, FIG.
4 is an operation time chart of each actuator during operation of the loom of the second embodiment.

A weft inserting device E for a loom according to the first embodiment.
Reference numeral 1 includes a length measurement storage device 10 and a weft pulling device 30 that pulls the weft Y from the length measurement storage device 10 by a roller that constantly rotates, and the rollers are paired on the driving side and the driven side. In the following, the driving side is referred to as the drum 33 and the driven side is referred to as the roller 35. And this weft pulling device 30
The switching device 50 that switches the pulling or non-pulling by holding the weft Y in the roller 35 and the pressure contact portion 33a of the drum 33 or separating and releasing the weft Y from the pressure contact portion 33a, and the weft yarn Y pulled by the operation of the switching device 50. It has a posture control nozzle 71 that causes a fluid jet to fly into the warp opening to insert the weft. Further, the switching device 50
Has a fluid ejecting means for ejecting a fluid onto the weft Y to perform switching, and the fluid ejecting means improves the responsiveness of the switching device.

With respect to the structure and operation of each part of the first embodiment,
Further details will be described. First, the present embodiment is provided with the A and B color weft inserting devices, but since both weft inserting devices have the same configuration, the A color weft inserting device will be mainly described. In addition,
The same parts are designated by the same reference numerals and detailed description thereof is omitted.

The weft inserting device E1 measures the weft Y supplied from the yarn supplying body 1 and stores it.
And a yarn guide 18 for guiding the weft Y from here,
A weft pulling device 30 that holds and pulls the weft Y from the yarn guide 18, and is provided between the weft pulling device 30 and the yarn guide 18 to switch between pulling and non-pulling the weft Y of the weft pulling device 30. A switching device 50 and a yarn guide 20 that guides the weft Y pulled by the weft pulling device 30 by switching the switching device 50 and the weft Y from the yarn guide 20 can freely come into contact with and move away from the weft Y. A weft braking device 60 that imparts resistance, a fluid ejecting device 70 that causes the weft Y to fly while controlling its posture by air ejection of a posture control nozzle 71, and this fluid ejecting device 70.
The cutter device 80 is provided in the vicinity of the weft, the photoelectric weft arrival sensor 100 is provided on the opposite weft insertion side, and the control device 120.

The weft measuring and storing device 10 has a main body 12 having a drum 11 in detail. 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 by the rotation of the winding arm 13 to be stored. This stored weft Y is used for the drum 11
It extends toward the yarn guide 18 while being locked by the locking claws 14 inserted in the outer periphery. The locking claw 14 is attached to an electromagnetically driven self-returning solenoid 15, which is retracted from the circumferential surface of the drum 11 by energization to release the locking of the weft Y and is deenergized by spring force. It advances to the peripheral surface to prevent the unwinding of the weft Y and finishes the weft insertion. In addition,
This energizing deenergization is operated by a signal from the control device 120. From the yarn guide 18 to the brake device 60, which will be described below, as shown in FIG.
It is attached to a fixed base 46 extending outward from the.

The yarn guide 18 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 yarn Y travels, and the weft yarn is provided at a predetermined position of the device provided on the downstream side. It is designed to guide Y.

As shown in FIG. 2, the weft pulling device 30 includes:
It is attached to the vertical wall 47 of the fixed base 46.
That is, the motor 31 of the weft pulling device 30 is fixed to the vertical wall 47, and the output shaft of the motor 31 has the vertical wall 4
7, a drive shaft 32 protruding to the front side of FIG. 2 is connected. The drive shaft 32 has a large-diameter cylindrical metal 2
The individual drums 33 are fixedly attached with screws 34 at predetermined intervals in the axial direction of the drive shaft 32. Each drum 33
A rubber roller 35 having a small diameter is arranged above each of the above. The roller 35 having a small diameter has a vertical wall 47 at the base end.
A metal cylindrical core body 3 rotatably attached to a free end portion of an arm 36 which is swingably attached to a vertical direction.
7 and a synthetic resin such as urethane or a rubber layer 38 bonded to the peripheral surface of the core body 37, and a large-diameter drum is provided by a tension spring 39 spanning the vertical wall 47 and the arm 36. It is biased to the 33 side. Then, the weft Y is held by the pressure contact portion 33a between the drum 33 rotated by the motor 31 and the roller 35 which is driven in pressure contact with the drum 33, whereby the weft Y is pulled and pressed. By being released from the portion 33a and released, the non-pulling state is established. Further, the switching device 50 described later forms a taper on the outer peripheral surface on the entrance / exit side so that the weft Y can easily enter / exit between the rollers 33 and 35.

Although the two drums 33 are configured to be driven by one motor 31 in this embodiment, the two drums 33 are separately driven to rotate in colors A and B by using the two motors. You may comprise. Further, the drum 33 and the roller 35 may be separately driven to rotate, and the outer diameters of the drum 33 and the roller 35 may be different according to the weft Y.

The switching device 50 is the most important constituent element of the present embodiment, and is composed of a fluid ejecting means that uses gas as the fluid ejecting, specifically, the air ejecting means to perform the switching. A table 51 erected on the table 48 and a fluid ejection nozzle 52 mounted on the table 51.
And an electromagnetic valve as a fluid ejection control means for supplying and stopping compressed air to the fluid ejection nozzle 52.
It is composed of individual switching valves 53. Although the attitude control nozzle 71 will be described later in detail, the attitude control nozzle 71 causes the weft Y to pull and fly while controlling the attitude thereof by air injection. At the same time, the weft path is held at the roller side, that is, the pulling position by the pulling force thereof. Will be.

That is, as shown in FIG. 4, the fluid injection nozzle 52 has a box-shaped member 52d attached to a column 52c.
The interior is divided into two chambers by a partition plate 52e. Further, slit-shaped injection ports 52f are provided on the opposite surfaces, and each chamber is connected to each switching valve 53 by a separate pipe 53c. That is, the fluid ejection nozzle 52 includes an A-side fluid ejection nozzle and a B-side fluid ejection nozzle. And
When compressed air is supplied from the switching valve 53, air is jetted from the jet port 52f.

The switching valve 53 is connected to a main pressure tank 76 which will be described later. When the valve is opened by a signal from the control device 120, compressed air from the main pressure tank 76 is fluid-injected through the switching valve 53. It is ejected from the nozzle 52. Although not shown, the switching valve 53 is provided with a throttle valve so that the injection pressure can be adjusted appropriately.

Now, the operation of the switching device 50 will be described with reference to FIG. The jet nozzle 52 is located in the vicinity of the pulling device 30 for pulling the A side weft Y and the B side weft Y, and
A switching valve 53, which is provided between the two wefts Y and close to the jet nozzle 52, is provided as a fluid jet control means. In the figure, the side A shows the state in which the weft yarn Y is sandwiched by the pressure contact portion 33a and is being pulled, the attitude control nozzle 71 is jetting and pulling, and the weft yarn Y is in the flight path. The side B shows the state in which the weft yarn Y is detached and released and is not being pulled, the attitude control nozzle 71 holds the weft yarn Y in the state of slight wind injection, and the weft yarn Y is in the release path.

When the pulling state shown on the A side is switched to the non-pulling state shown on the B side, compressed air may be jetted from the jet port 52f on the A side to the weft yarn Y on the A side. By the jetting, the weft yarn Y is displaced outward by the wind pressure, and the drum 33 is rotating at a high speed. Therefore, the weft yarn Y is instantaneously separated from the pressure contact portion 33a, the wind pressure of this jetting and the traction force of the attitude control nozzle 71 are balanced, and the weft yarn Y is Are kept in the release path as shown on the B side.

Contrary to the above, when switching the weft Y on the non-traction release route shown on the B side to the towing flight route shown on the A side, the injection from the injection port 52f should be stopped. Good. Due to this stop, the weft Y moves to the attitude control nozzle 71.
Is towed, and is instantly sandwiched by the pressure contact portion 33a, and is put in a towed state. In one cycle of loom operation,
The compressed air is jetted from the fluid jet nozzle 52 all the time except when the weft is pulled, and the jet from the attitude control nozzle 71 is always jetted including the breeze jet. As described above, the switching by the fluid ejection has extremely high responsiveness. Therefore, it is possible to reliably prevent an accident such as a weft breakage at the end of weft insertion.

The yarn guide 20 has a conical weft storage surface formed on the inner surface thereof, and the weft drawn by the drum 33 and the roller 35 is temporarily stored, so that the drum 33,
Attenuating the Z-shaped weft slack caused by the difference in pulling speed until the pulling speed by the posture control nozzle 71 is sufficiently increased at the time of starting pulling by the roller 35, and prevents the posture control nozzle 71 from being caught or causing a cloth damage. Is.

Next, the weft braking device 60 is provided in the vicinity of the downstream of the yarn guide 20 and is attached to the brake solenoid 63 which is a rotary solenoid of the electromagnetically driven self-returning type and the output shaft of the brake solenoid 63. And a rod-shaped actuator 64 that is formed.

Then, by rotating the brake solenoid 63, the weft Y is pushed down by the actuator 64 and pressed against the trailing edge of the yarn guide 20 to impart running resistance to the flying weft Y. . It operates just before weft insertion,
The brake is applied to relieve the high tension that accompanies the stop of running and prevent weft breakage.

Returning to FIG. 1, the fluid ejecting apparatus 70 comprises a posture 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 includes a main pressure tank 76 connected to a pressurized air supply source 74 via a pressure reducing valve 75. On the discharge side of the main pressure tank 76, an electromagnetically driven self-return type on-off valve 77
The attitude control nozzle 71 is connected via. Then, the on-off valve 77 opens and closes in response to a signal from the control device 120, and air is injected and stopped. By this injection, the weft Y pulled from the weft pulling device 30 flies to the opposite weft insertion side while controlling the posture. In addition, the posture control nozzle 71 constitutes a part of the switching device 50 as described above, and holds the weft Y by the slight air jet even when the jetting is stopped.

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 with a constant pressure tank connected to the pressurized air supply source 74 via a pressure reducing valve. The constant pressure tank and each sub nozzle group 7 are provided.
Electromagnetically driven self-returning type on-off valves are provided between the two. The on-off valves provided for each 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. By the relay injection from the weft insertion side of the sub nozzle group 72 to the reverse weft insertion side, the weft Y is reed 3
It is designed to fly through the warp shed through an air guide (not shown) formed in the above to be weft-inserted.

The cutter device 80 includes a cutter 81 fixedly provided on the cloth fell side of the weft insertion side and attached to extend in the front-rear direction, and a rotary solenoid 82 for rotationally driving the lower blade of the cutter 81. It is made of and cuts the reed beating yarn.

The weft removing device 85 is provided when the weft insertion failure occurs.
With a device for automatically removing the defective weft Y, the defective weft is blown above the posture control nozzle 71 by an air jet nozzle provided on a lead holder (not shown), and the weft yarn connected to the posture control nozzle 71 is cut by the cutter device 80. The defective weft that has been blown up is transferred to the suction jet pipe 201 by the swinging arm 200, then nipped by a pair of rollers 202 and 203, rotated and wound up, and sucked and removed by the suction pipe 204. However, since it is not directly related to the present invention, detailed description thereof will be omitted.

On the other hand, for example, a photoelectric 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. Control device 120
Inputs the output signal of the weft arrival sensor 100 and the rotation angle signal from the angle sensor 6, calculates the difference between the arrival timing and the set arrival timing preset in the control device 120 as a reference value, and the drum 33 The rotation speed of the motor 31 and the injection stop timing of the injection nozzle 52 are controlled.

The controller 120 is the loom body controller 12
1, a weft selection command device 122, an actuator drive command generation device 123, and an inverter device 124. The 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 control device 12 for the main body of the loom.
1, the weft selection command device 122, and the actuator drive command generation device 123, the weaving machine main body control device 121, the weft selection command device 122, and the actuator drive command generation device 123.
Operate independently and sequentially by the angle signal of the angle sensor 6.

Although not shown, the loom main body controller 121 has an input / output unit (interface) and an arithmetic unit (C).
PU), a storage unit (ROM, RAM), and an operation panel for manually inputting setting values and the like, and are connected to a host computer that manages a plurality of looms (not shown). Then, the loom operation signal is issued to control the start and stop of the inverter 124 of the loom main motor 7 and the motor 31 of the weft pulling device 30, the details of which will be described in a time chart.

The preparation button 121a is first pushed when starting the loom and is connected to the input / output section.
By pushing this, the loom main body control device 121
Is the inverter 124 of the motor 31 of the weft pulling device 30.
Is started, and at the same time, an operation start of a timer 121d described later is instructed. The start button 121b is connected to the input / output section, and the motor 31 reaches the normal rotation,
Press the button after the ready signal for starting the loom is output and ready to be displayed on the display (not shown).
By pressing 1b, the loom main motor 7 is started.
Even if the start button 121b is pressed when the motor 31 has not reached the normal rotation, the timer 12 does not operate.
Due to 1d, the engine will not start until a predetermined time has elapsed. The stop button 121c is a button that is pressed when stopping the loom, and can be pressed at any time as necessary.

The timer 121 is provided between the input / output unit (not shown) and the driver 7a of the main motor 7.
d is interposed. 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 loom main body control device 121 commands 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 lapse of a predetermined time, the switch of the timer 121d is closed. Then, by pressing the start button 121b, a start signal from the input / output section is input to the driver 7a, the loom is started, and operating signals are input to the weft selection command device 122 and the actuator drive command generator 123 as well.

The predetermined time is a time required for the roller 33 to reach the optimum rotation speed for weft insertion and is, for example, about 10 to 30 seconds.

The weft selection command device 122 instructs the actuator drive command generation device 123 which weft yarn to be used for the next weft insertion according to a pre-programmed sequence in the case of multicolor weaving or changeover weaving or crossover weaving. Now, assuming that one color is the A side and the other color is the B side, the actuator drive command generator 123 is instructed that the next weft insertion is, for example, the A color. The instruction of the color A has already been output in advance from about 300 degrees of the previous cycle at the main shaft angle, and when it reaches 300 degrees subsequently, for example, the designation of the color B is output as the weft thread of the next cycle. The order of the colors is ABB, ABB, ... Or AAB, AAB ,.
There are various orders like ... The preceding output is for preventing malfunction due to a response delay from the selection of the weft thread to the operation of each actuator.

The actuator drive command generator 123 sequentially operates each actuator via a driver in accordance with a signal from the angle sensor. As for the main actuators, 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 52a is for operating the A side fluid injection nozzle 52, the driver 52b is for operating the B side injection nozzle 52, and the driver 77a is for the A side opening / closing valve 77.
(Attitude control nozzle on A side) For operation, driver 77b is B
Side opening / closing valve 77 (B side attitude control nozzle) is operated, and driver 82a is for cutter 81 operation. In the case of multi-color weaving, each driver is selectively operated according to the weft Y selected in advance.

Next, the second embodiment will be described with reference to FIGS.
2 will be described. The present embodiment is different from the first embodiment in that it is provided with a switching device using only fluid, but differs in that fluid ejection is used as auxiliary means when moving the weft path by means of a guide portion. Therefore, only the weft pulling device, the switching device, and the actuator drive command generating device are different from the first embodiment, and the other parts are almost the same, so only the different parts will be described. Further, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In the weft pulling device 300, the motor 31 is attached to the vertical wall 47, and the drum 333 is attached to the output shaft thereof, as in the first embodiment. The drum 333 is formed in a cup shape by integrating two drums.

The two rollers 335 pressed against the drum 333 have the same construction as that of the first embodiment, but the two rollers 335 are separately and independently rotatably supported.
That is, the stage 336 is provided close to the drum 333, and both ends of the stage 336 (the drum 3
A shaft support portion 337 is provided in each of the directions along the rotation axis 33. An arm 338 is rotatably attached to each shaft support 337, and the roller 335 is rotatably attached to one end of each arm 338. A pressing spring 339 composed of a tension spring is attached to the other end of each arm 338, and the pressing spring 339 is fixed to the fixing pin 34.
Since one end is locked to 0 and the other end is locked to the arm 338, the roller 335 is constantly in pressure contact with the drum 333. The roller 335 is driven by this pressure contact, and the weft Y is pinched and pulled by the pressure contact portion 333a. Reference numeral 341 is a stopper for rotation of the arm 338 in the pressure contact direction. 7 and 8 show a case where a yarn guide 302 having a guide portion 301 that is convex toward the drum 333 and the roller 335 is provided on the downstream side of the drum 333 and the roller 335. The Z-shaped weft slack that occurs when the roller 335 starts to pull it is guided along the guide portion 301, and the slack shape is made smooth and attenuated, and has the same effect as the yarn guide 20 shown in FIG.

The switching device 500 supplies two switching driving bodies 551 mounted on the stage 336, two switching bodies 553 mounted on the switching driving body 551, and compressed air to the switching bodies 553. It is composed of two switching valves 558 and a positioning stopper 560 for regulating the switching position of the switching body 553.

The switching driving body 551 is composed of an electromagnetically driven automatic return type rotary solenoid attached to the lower surface of the stage 336, and the output shaft 552 has a stage 336.
Protruding on the upper surface of. Then, the command from the actuator command generator 123 is input to the drivers 551a and 551b to operate. The switching body 553 has a guide portion 554 having a guide hole 554a for guiding the weft Y, an auxiliary portion 555 having an injection hole 555a for guiding compressed air to the guide hole 554a, the guide portion 554, and the auxiliary portion. 5
And a boss portion 556 for attaching 55 to the output shaft 552.

The switching valve 558 is an electromagnetically driven automatic return type solenoid valve, and is an injection hole 555 of the auxiliary portion 555.
Compressed air is supplied to a through a pipe 559. Then, the command from the actuator drive command generator 123 is input to the drivers 558a and 558b to be opened / closed. Further, the positioning stopper 560 is provided for each switching body 5
It is provided so as to correspond to 53 and contacts the outside of the switching body 553 at the switched position to regulate the stop position. The guide portion 5 of the switching body 553
54, switching drive body 5 as drive means for the guide portion 554
51 and the positioning stopper 560 constitute the switching means 565, and the auxiliary portion 555 of the switching body 553 and the switching valve 558 constitute the auxiliary means 568.

Switching device 5 with reference to FIGS. 9 to 12.
The operation of 00 will be described. In FIG. 9, the side A is weft Y
Is on the release route from the roller side, and the weft Y on the B side is kept on the flying route. Therefore, as shown in FIG.
When the switching body 553 is switched to move the weft Y from the pulling position to the non-pulling position, that is, from the pulling route by the roller to the releasing route, the weft yarn Y is switched due to inertia because of the inertia. Y does not follow and is delayed, and becomes as shown by the curve Yc. Therefore, at the same time as switching, compressed air is blown into the auxiliary portion 555, and the guide portion 554
Air is jetted to the weft Y between the tip of the pressure contact portion 333a. By this jet, the weft yarn projecting from the guide portion 554 receives a force so as to be positioned in the extension direction of the guide portion 554, so that the weft yarn Y pulled out from the pressure contact portion 333a and delayed in movement can be forcibly moved. That is, the responsiveness can be greatly improved.

FIG. 11 shows a case where the weft Y on the release path is switched to the flying path, that is, a case where the weft Y is switched from non-pulling to pulling. The weft Y does not follow the movement of the switching body 553, The weft Yd shown in the figure is in a state in which the movement is significantly delayed due to inertia. Therefore, similarly to the above switching, the compressed air is injected. By this jet, weft Yd
Is sent to the press contact portion 333a, and the switching is completed.
The response can be greatly improved even when switching to towing.

Next, the overall operation of each of the above-described embodiments will be described with reference to the time chart of FIG. 13, taking the case of the first embodiment as an example. This figure shows the operating state of each actuator when the loom of this embodiment is in steady operation. The horizontal axis shows the rotation angle of the main shaft 5, and the vertical axis shows the operation content of each actuator. It is a diagram. In the description of the present embodiment, the weaving machine in which the weft yarns on the A side and the B side are alternately inserted is shown, but basically, on the A side,
Since the operation is the same on the B side, only the A side will be described.

The main operation contents will be described. The loom start preparation signal is output when the preparation button 121a is pressed, but it is turned on during operation of the loom after the preparation time has passed. The loom operation signal is output when the start button 121b is pressed, but is turned on during the operation of the loom. 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 indicates that the loom start is blocked, that is, timer 1
It is OFF when 21d is in operation and is open, and is ON when the timer 121d is closed and conductive, that is, when the preparation for starting is completed, it is ON during the operation of the loom.

The signal of the weft thread catching claw 14 is OFF when the signal is OFF, is ON when the signal is OFF, and the attitude control nozzle 71 is ON.
Is jetting, OFF is stopped (only slight breeze jet), cutter 8
1 is ON disconnection, OFF is open, weft brake 60 is O
N is released, OFF is braking, color command is ON, command is OFF, command is OFF, fluid injection nozzle 52 (switching valve 53) is ON for injection, and OFF is for stop.

Now, in the state just before the rotation angle of the main shaft 5 reaches the 0-beat beating at the left end of the drawing, the weft Y
Has reached the anti-weft insertion side, and at this point,
The weft-locking pawl 14 is in a state where the weft Y is locked, and the attitude control nozzle 71 is not jetting (only a slight breeze jet). Further, although the drum 33 and the roller 35 of the weft pulling device 30 are rotating, the weft Y is released in the release path (non-pulling state). On the other hand, the weft brake 60 as a brake device is braking. And the rotation angle of the spindle 5 is 0
Immediately after the beating is over and the beating operation is finished, the cutter device 80 on the weft insertion side is activated to cut the weft Y.

When the rotation angle of the main shaft 5 reaches 60 degrees, the attitude control nozzle 71 starts jetting, but the weft Y does not fly. Then, the locking claw 14 releases the weft Y, and when the weft Y starts to fly, the weft brake 60 is released immediately (about 90 degrees in rotation angle), and at the same time, the fluid injection nozzle 53 is roughly at the same time.
The (switching valve 53) is turned off, the weft Y is moved to the flight path, is sandwiched by the drum 33 and the roller 35, and flies to the opposite weft insertion side at a predetermined flight speed (traction state). Then, the weft Y is sent to the reverse weft insertion side while the posture is controlled by the relay injection of the posture control nozzle 71 and the sub nozzle group 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 immediately enters the locking position. At this time, the fluid ejection nozzle 53 is turned on, and the compressed air is ejected until the next towing. Then, after the locking claw 14 enters the locking position, the weft Y is substantially locked after the winding is unwound approximately one turn, and the weft insertion is completed.

Since the switching device 50 switches the weft Y by fluid injection at a high response speed and switches the weft Y to pulling or non-pulling, weft insertion failure and weft breakage do not occur. Further, since the weft is switched to the traction or the non-traction only with the fluid, a guide member for moving the weft path is not necessary.

Next, the case of the second embodiment will be described as an example with reference to the time chart of FIG. This figure shows the operating state of each actuator when the loom of this embodiment is in steady operation. The horizontal axis shows the rotation angle of the main shaft 5, and the vertical axis shows the operation content of each actuator. It is a diagram. In the description of the present embodiment, a weaving machine in which the weft yarns on the A side and the B side are alternately inserted is shown, but basically the operations on the A side and the B side are the same, so only the A side will be described.

The main operation contents will be described. The loom start preparation signal is output when the preparation button 121a is pressed, but it is turned on during operation of the loom after the preparation time has passed. The loom operation signal is output when the start button 121b is pressed, but is turned on during the operation of the loom. The roller rotation command signal is output when the preparation button 121a is pressed,
The roller 333 is rotationally driven and is turned on during operation. The loom start permission signal is OFF when the loom start is blocked, that is, when the timer 121d is operating and is open, and is turned ON when the timer 121d is closed and conductive, that is, when the loom is ready to start. It is turned on during operation.

The signal of the weft-locking claw 14 is OFF when the signal is OFF, is ON when the signal is OFF, and the attitude control nozzle 71 is ON.
Is jetting, OFF is stopped (only slight breeze jet), cutter 8
1, ON is cut off, OFF is opened, switching means 565 (switch body 553) is ON tow, OFF is not tow, weft brake 60 is ON to release, OFF is braking, and color command is ON. Among them, OFF is a command stop, switching auxiliary means 568 (switching valve 558) is ON, and injection is performed.
F is stopped.

Now, in a state just before the rotation angle of the main shaft 5 reaches the 0-degree beating at the left end of the drawing, the weft Y
Has reached the anti-weft insertion side, and at this point,
The weft-locking pawl 14 is in a state where the weft Y is locked, and the attitude control nozzle 71 is not jetting (only a slight breeze jet). Further, the drums 333 and 335 of the weft pulling device 300 are rotating, but the weft Y is released in the release path (non-pulling state). On the other hand, the weft brake 60 as a brake device is braking. And the rotation angle of the spindle 5 is 0
Immediately after the beating is over and the beating operation is finished, the cutter device 80 on the weft insertion side is activated to cut the weft Y.

When the rotation angle of the main shaft 5 reaches 60 degrees, the attitude control nozzle 71 starts jetting, but the weft Y does not fly. Subsequently, when the locking claw 14 releases the weft Y and the weft Y starts to fly, the weft brake 60 is released immediately (about 90 degrees in rotation angle), and generally at the same time, the switching means 565 (the switching body 553) of the switching device 500. ) Turns on. At this time, the switching assisting means 568 (switching valve 558) is turned off.
After the N operation and the OFF operation, the weft Y is moved to the flying path, is sandwiched by the drum 333 and the roller 335, and flies to the opposite weft insertion side at a predetermined flying speed (pulling state). Then, the weft Y is transferred to the attitude control nozzle 71 and the sub nozzle group 7
It is sent to the reverse weft insertion side while the posture is controlled by the second relay injection. 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 immediately enters the locking position. At that time, the switching means 565 is activated, and at this time, the switching assisting means 568 is turned on after the activation.
FF works. Then, after the locking claw 14 enters the locking position, the weft Y is substantially locked after being unwound about one turn.
Weft insertion is completed.

When the switching means 565 is operated, fluid is ejected by the switching assisting means 568, so that the weft Y can be switched at high response speed to be pulled or undrawn, resulting in weft insertion failure or weft breakage. It never happens. Further, the compressed air injection of the switching assisting means 568 is performed just before the switching means 565 performs the switching.
Although it is so arranged that it is carried out back and forth until just after the switching, the auxiliary means 568 for switching in the second embodiment.
As shown in FIG. 13, if compressed air is constantly jetted except when pulling, the guide portion 554 is largely swung to keep the weft Y separated from the press contact portion 333a (see FIG. 12). Even if the weft Y does not have the roller 335 and the drum 333.
Since it does not damage the weft yarn Y by contacting with, it is possible to reduce the swing amount of the guide portion 554 and increase the speed.

Although air is used as the fluid in each of the above embodiments, other fluids such as water may be used, and the switching means and the switching assisting means are integrally formed, but they are separately provided. You may comprise.

[0062]

According to the present invention, since the weft yarns are moved and switched by jetting the fluid, the response can be greatly improved. Therefore, it is possible to obtain a high-speed loom without the risk of weft insertion failure or weft breakage.

Further, in another invention, the weft is moved by the switching means, and the portion delayed in movement due to the inertia of the weft is forcibly moved to the regular weft path by fluid injection. Therefore, the delay in switching due to inertia can be reliably eliminated. Therefore, the switching responsiveness can be greatly improved, and a high-speed weaving machine that is free from weft insertion failure and weft breakage can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing the overall configuration of a first embodiment.

FIG. 2 is a perspective explanatory view of the same.

FIG. 3 is an explanatory plan view of a main part (switching device) of the same.

FIG. 4 is a perspective explanatory view of a main part (fluid ejection nozzle) of the same.

FIG. 5 is an explanatory plan view showing the overall configuration of the second embodiment.

FIG. 6 is a perspective explanatory view of the same.

FIG. 7 is an explanatory plan view showing a main part (switching device) of the same.

FIG. 8 is an explanatory front view showing a main part (switching device) of the same.

FIG. 9 is a plan view explanatory view for explaining the same operation.

FIG. 10 is an explanatory plan view similarly illustrating the operation.

FIG. 11 is an explanatory plan view for explaining the same operation.

FIG. 12 is an explanatory plan view similarly illustrating the operation.

FIG. 13 is an operation time chart of each actuator during operation of the loom according to the first embodiment or the second embodiment.

FIG. 14 is an operation time chart of each actuator during operation of the loom according to the second embodiment.

[Explanation of symbols]

 10 Length Measuring Storage Device 30 Weft Pulling Device 33 Drum (Roller) 35 Roller 50 Switching Device (Fluid Injecting Means) 52 Fluid Injecting Nozzle 53 Fluid Injection Controlling Means (Switching Valve) 71 Attitude Control Nozzle 300 Weft Pulling Device 333 Drum (Roller) 335 Roller 500 Switching device 551 Driving means (switching driving body) 554 Guide part 568 Auxiliary means Y Weft

Claims (5)

[Claims] 1. A length measuring and storing device, a weft pulling device that pulls a weft from the length measuring and storing device by a roller that constantly rotates, and a switching device that switches between pulling and non-pulling by the roller of the weft pulling device. A weft inserting device of a loom, comprising: a weft yarn pulled by a roller by the operation of the switching device, and a posture control nozzle that causes the weft yarn to fly into the warp shed by fluid ejection to insert the weft yarn. A weft inserting device for a loom, comprising a fluid ejecting means for ejecting a fluid to switch the weft yarn path. 2. The fluid ejecting means of the switching device disengages and releases the weft path from the roller side by fluid ejecting from the fluid ejecting nozzle to switch from pulling to non-pulling, and stopping fluid ejecting from the fluid ejecting nozzle. 2. The weft inserting device for a loom according to claim 1, further comprising: a fluid ejection control unit that moves the weft path to the roller side by the pulling force of the attitude control nozzle to switch from non-pulling to pulling. 3. A length measuring storage device, a weft pulling device for pulling a weft from the length measuring storage device with a roller that constantly rotates, and a switching device for switching between pulling and non-pulling by the roller of the weft pulling device. A weft inserting device of a loom, comprising a weft yarn pulled by a roller by the operation of the switching device, and a posture control nozzle for flying the fluid into the warp opening by fluid injection to insert the weft. The guide part, the guide part driving means for moving the weft yarn path by moving the guide part, and switching the weft yarn between the pulling and the non-pulling by the roller, and the weft route side after switching during the switching operation by the driving means. A weft insertion device for a loom, comprising: an auxiliary unit that ejects fluid to assist movement of the weft yarn path. 4. The weft inserting device for the loom according to claim 3, wherein the auxiliary means of the switching device is provided in the guide portion and injects a fluid along the guide direction. 5. The fluid ejecting means for ejecting a fluid to hold the weft yarn at a position where the weft yarn is separated from the roller when the guide part disengages the weft yarn from the roller and is in a non-pulling state. The weft inserting device for the loom according to claim 3, wherein the time is set.