JPH0679782U - Defective weft removing device for loom - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is designed to remove a defective weft when a weft break occurs in the section from the yarn feeder to the length-measuring storage device. An object of the present invention is to provide a defective weft removing device that does not get entangled in the weft portion. When a defective weft Y is removed, a jet nozzle 46 for jetting a fluid from the weft outlet side to the weft inlet side of the length measuring and storage device 3 is provided to prevent the weft Y from being entangled with the preceding weft Y on the drum 5. The operation is such that the weft Y is the measuring and storing device 3
The control device 100 continues until the photoelectric sensor 75 confirms the absence of the weft yarn.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for removing defective weft yarns that are wound around a drum of a length measurement storage device and connected to a main nozzle when a weft yarn break occurs in a section from a yarn feeder to the length measurement storage device in a loom.

[0002]

[Prior art]

 When weft breakage occurs between the yarn feeder and the length measuring and storage device, it is detected and the operation of the loom is immediately stopped, and fluid is jetted from the main nozzle to suck the defective weft by the weft draft removing device. A defective weft removing device for removing this weft by doing so is already known. (JP-A-2-269838)

[0003]

[Problems to be solved by the device]

 By the way, in such a defective weft removing device, when the operation of the weaving machine is stopped due to the occurrence of the weft breakage, the rotating yarn guide that winds the weft yarn around the drum of the length measuring storage device is also suddenly stopped to ensure durability. Since it also causes a rapid drop in the speed, the rotating yarn guide is normally rotated several times while rotating to decelerate and stop.

Therefore, when a weft breakage occurs between the yarn feeder and the length-measuring storage device, the cut end portion of the weft (hereinafter referred to as a defective weft) extending from the cut portion to the length-measuring storage device is Often, the above-mentioned braking rotation passes through the rotary yarn guide as it is and then comes onto the drum.After that, when the weft yarn is pulled out by the jet fluid of the main nozzle and removed by the weft yarn pulling and removing device, this cut end is There is a case that the defective weft cannot be smoothly removed because it is entangled by covering the weft that is wound before being pulled out from the drum.

In view of the above-mentioned problems, the present invention removes a defective weft by a weft pulling and removing device so that the cut end of the weft on the drum is not entangled with the preceding weft part. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, when a weft breakage occurs in the section from the yarn feeder to the length measuring storage device, the defective weft stored in the drum of the length measuring storage device is passed through the main nozzle. A mechanism for removing the defective weft, characterized in that when the defective weft is removed, an ejection nozzle is provided for ejecting fluid from the weft pull-out side of the drum of the length measurement storage device toward the weft winding side. A weft removing device is provided.

[0007]

[Action]

 When removing the defective weft, the jetting nozzle ejects a fluid from the weft outlet side of the drum of the length measuring and storage device to the winding side of the weft so that the cutting end of the defective weft is held on the winding side of the weft. It does not get entangled by covering the weft thread that was wound around the drum, and when the weft thread that is wound around the drum and is connected to the main nozzle is pulled out, it does not get entangled at the cut end of the weft thread.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of a loom equipped with the defective weft removing device of the present invention will be described with reference to FIGS. 1 to 3 showing its normal operating state.

FIG. 1 basically shows a front surface of a weft inserting mechanism of a loom, and is a partial plan view. 2 is an enlarged plan view from the direction of arrow A in FIG. 1, and FIG. 3 is a sectional view of the mechanism taken along the line BB.

With reference to FIG. 1, the weft yarn Y is drawn out from a yarn feeder (package) 1 and then guided to a rotary yarn guide 8 of a drum type length measurement storage device 3.

The drum type length measuring and storage device 3 is held in a stationary state by being rotatably supported by a rotating body 4 which is rotationally driven by a motor (not shown) and a tip end shaft portion of the rotating body 4. A frame-shaped drum (wire drum) 5, a length-measuring claw 7 that is driven by a solenoid 6 and enters and leaves a concave portion (between the wires forming the drum) on the peripheral surface on the tip side of the drum 5, and a rotating body 4. And a pipe-shaped rotating yarn guide 8 for winding the weft Y around the drum 5 by rotating the weft Y around the drum 5. Here, the rotary yarn guide 8 has an inlet portion located on the center line of the rotating body 4, is bent in the middle, and an outlet portion is located around the drum 5, and the weft Y is rotated around the drum 5 by the rotation of the outlet portion. Wrap around.

The weft Y from the length measurement storage device 3 is guided to a roller type traction device 10 via a yarn guide (ballooning cover) 9 and further to an attitude control nozzle (main nozzle) 18.

The yarn guide 9 has a large diameter on the side of the length measurement storage device 3 and is formed so that the diameter gradually decreases toward the downstream side where the weft Y advances.

The roller type weft pulling device 10 includes a pair of pulling rollers 11 and 12 capable of holding and pulling the weft Y between the yarn guide 9 and the attitude control nozzle 18, and the yarn guide 9 and the pulling roller. The traverse lever 15 is provided between the rollers 11 and 12 and serves as a switching device that switches the path of the weft Y.

The large-diameter roller 11 of the pair of towing rollers 11 and 12 is rotationally driven by the motor 13 so as to rotate at a substantially constant speed during operation of the loom. A pair of small-diameter rollers 12 is arranged above the large-diameter roller 11. The small-diameter roller 12 is rotatably attached to a free end of an arm (not shown) that is biased by a spring, and is pressed against the large-diameter roller 11 side. The weft Y is pulled by being sandwiched between the rollers 11 and 12.

The traverse lever 15 has its base end fixed to the output shaft of the rotary solenoid 14. The tip of the traverse lever 15 is extended near the contact surface of the pair of pulling rollers 11 and 12, and the extended end is bent upward and the threading groove 16 into which the weft Y is inserted. Are formed. (See Figure 3). Further, in order to facilitate the insertion of the weft Y into the threading groove 16, a taper is attached to the entrance side of the threading groove 16.

FIG. 2 shows swinging of the traverse lever 15 by the rotary solenoid 14, whereby the weft Y during normal operation is pulled in or pulled out between the pair of pulling rollers 11, 12. To do.

That is, when the traverse lever 15 is stopped at the position shown by the solid line, the weft Y is on the path displaced from the path between the rollers 11 and 12 and is pulled from between the rollers 11 and 12. It has been pulled out.

Since the main nozzle 18 directly pulls the weft Y by the rollers 11 and 12, it is only necessary to maintain the weft posture, and the air consumption can be reduced. To do. This attitude control nozzle 18 is attached to the end of the reed holder (not shown) on the weft insertion side, is directed toward the warp opening, and is jetted while controlling the attitude of the weft Y by air injection. .

Further, a plurality of auxiliary nozzles 19 are provided in order to blow the tip of the weft Y from the attitude control nozzle 18 one after another by air injection.

The plurality of auxiliary nozzles 19 are attached to the reed holder at predetermined intervals along the weft insertion path, and sequentially inject air from the weft insertion side to the reverse weft insertion side for a predetermined period. Then, relay jetting is performed so as to follow the flying tip of the weft Y, and the relay jets the weft Y into the warp opening through the weft guide groove formed in the reed and is inserted.

A cutter 20 is provided between the posture control nozzle 18 and the warp W row. The cutter 20 cuts the weft Y by driving the lower end of the weft Y, which has been inserted into the weft Y, by a rotary solenoid (not shown). Although not shown, a cutter is also provided on the reverse weft insertion side of the warp W row to cut the weft Y after several picks.

The operation of each actuator of the weft inserting device is controlled by the control device 100. For this control, a signal is input to the control device 100 from an angle sensor (not shown) or the like for detecting the rotation angle of the loom main shaft. It

A tenser 30 with a booster is provided between the yarn feeder 1 and the length measuring and storing device 3, and the weft Y is pulled through this. Further, a photoelectric sensor 31 for detecting the presence or absence of the weft Y is provided on the inlet side of the tensor with tensor 30 with booster.

The weft Y drawn out from the booster tensor 30 is directed toward the inlet of the rotary yarn guide 8 of the length measurement storage device 3, but is rotated in the pulling direction from the booster tensor 30 (the jetting direction of the booster tensor 30). It intersects with the direction of drawing into the yarn guide 8 near the entrance of the rotating yarn guide 8.

Further, a pair of grippers 32, 33 for gripping the wefts are provided with the yarn path between the tensor 30 with booster and the rotary yarn guide 8 being sandwiched. One gripper 32 is supported by a support 34, and the other gripper 33 is rotatably held at the tip of an air cylinder 35. Therefore, the gripper 33 is moved by the projecting operation of the air cylinder 35, and the weft Y is held between the gripper 33 and the gripper 32.

A guide pipe 36 is provided downstream of the booster tensor 30 in the injection direction, and a suction pipe 37 is provided downstream of the guide pipe 36. An electromagnetically driven cutter 38 is provided between the guide pipe 36 and the suction pipe 37.

A threading nozzle 39 is provided so as to face the entrance of the rotary yarn guide 8.

The length measuring and storing device 3 includes a photoelectric sensor 40 that detects the weft Y on the drum 5 being unwound, and a yarn breakage between the yarn feeder 1 and the length measuring and storing device 3. When the defective weft yarn is pulled out from the drum 5 by the attitude control nozzle 18 and removed by the weft yarn removing device 200, the cut end portion that has come out from the outlet portion of the rotary yarn guide 8 is entangled with the weft yarn pulled out on the drum 5. In order to prevent this, a fluid jet nozzle 46 for jetting a fluid is provided on the weft drawing side or the winding side. This fluid ejection nozzle 46 is an important element of the present invention.

In FIG. 1, the fluid injection nozzle 45, the length measurement 7, and the solenoid 6 are shown below the drum 5, but in reality, as shown in FIGS. The fluid ejecting nozzle 46 is integrally attached to a bracket (not shown) of the sole 6 which is disposed on the side (the cloth fell side).

The jet nozzle 46 operates at the time of removing a defective weft described later, and will be described in detail later.

A weft guide pipe 41 is provided between the yarn guide 9 and the attitude control nozzle 18. A slit 42 extending from the inlet end to the outlet end is formed on the side of the weft guide pipe 41 (see FIG. 3). Further, as shown in FIG. 2, the weft guide pipe 41 is curved so that its intermediate portion is retracted from the roller type traction device 10 and the traverse lever 15 in the weft path, and the slit 42 is positioned on the weft path side. It is fixedly arranged.

In this case, if the weft guide pipe 41 is formed of a flexible member, the position of the weft guide pipe 41 can be easily set no matter where the upstream device and the downstream device are installed.

The yarn guide 9 on the upstream side of the weft guide pipe 41 is provided with a yarn passing nozzle 43 that blows the weft Y by the injection air and pulls the weft Y into the weft guide pipe 41 when the weft is passed.

A baffle member 44 is provided on the downstream side of the weft guide pipe 41, and the attitude control nozzle 18 on the further downstream side sucks in and draws in the weft Y at the inlet of the attitude control nozzle 18. The air blown from the attitude control nozzle 18 is used as a suction means for drawing the weft Y through the slit 42 onto the weft path. The mechanism and action around the baffle member 44 will be described later in detail.

Above the attitude control nozzle 18, a weft removing device 200 is installed on a fixed bracket 50. The weft removing device 200 includes a dog-shaped delivery arm 52 that swings around its output shaft by an air motor 51, and a suction injection pipe. 53, a pair of winding rollers 54 and 55, and a suction pipe 56 are provided.

The suction / injection pipe 53 is for generating a suction airflow on the inlet side and a jet airflow on the outlet side by air injection from an air injection port provided on the inner circumference of the intermediate portion, and by an air cylinder (not shown). It oscillates so as to oscillate between a position oriented between the end faces (center) of the pair of take-up rollers 54, 55 and a position oriented tangentially to the circumferential surfaces of the take-up rollers 54, 55. There is.

The lower take-up roller 55 of the pair of take-up rollers 54, 55 has a truncated cone shape and can be driven to rotate by a motor 57. The upper take-up roller 54 has a downward truncated cone shape and is rotatably held at the tip of an air cylinder 58 in the circumferential direction. The upper take-up roller 54 moves downward by the projecting operation of the air cylinder 58 and moves downward. The weft yarn Y is gripped between it and 55, and in this state, it is driven by the rotation of the lower take-up roller 55.

During normal operation of the weft inserting mechanism configured as described above, when a weft breakage occurs in the section from the yarn feeder 1 to the length measurement storage device 3, from the cutting portion to the attitude control nozzle 18. Next, the operation of the apparatus for removing the defective weft will be described with reference to FIGS. 4 to 10.

As shown in FIG. 4, when the weft Y is cut near the yarn feeder 1, the weft Y is consumed, and when the sensor 31 detects the absence of the yarn, a loom stop signal is generated, The loom is stopped at a predetermined angle of the main shaft of the loom (for example, 250 degrees when the beating is 0 degrees). In this state, the cut end portion Y'of the defective weft yarn Y is almost removed from the rotary yarn guide 8. Then, when the loom is stopped, the defective weft yarn Y is pulled out from the drawing rollers 11 and 12 by the traverse lever 15.

Next, an operation of removing the defective weft Y on the length measurement storage device 3 is performed. That is, here, after the length measuring claw 7 is pulled out from the drum 5, air is jetted from the posture control 18 and at the same time, the jetting of the blowing nozzle 48 is started, and the weft Y that has exited the posture control 18 is shown in FIG. Blow upwards.

Further, when the loom stop signal is transmitted, the jet nozzle 46 is actuated as shown in FIG. 4, and the jet air is caused to flow around the drum 5 from the weft outlet side to the weft inlet side. As a result, when the weft cutting portion Y ′ comes out from the rotary yarn guide 8 onto the drum 5, the weft winding side is fluttered by the flow of jet air (the solid line of the weft Y in FIG. 11), which causes the drum. The defective weft yarn Y previously wound around No. 5 is not entangled with the weft yarn Y (dotted line of the weft yarn Y in FIG. 11). The operation of the jet nozzle 46 is stopped at the start of the operation for removing the defective weft Y 1, or is continued until the defective weft Y on the drum 5 is exhausted. When the weft detection signal of the sensor 75 is turned off, it stops almost in synchronization.

On the other hand, for the defective weft Y that has been blown up, the delivery arm 52 is moved to the weft delivery position by the air motor 51 and the injection of the suction injection pipe 53 is started.

Then, from this state, the delivery arm 52 is rotated by the air motor 51, and the inferior weft yarn Y is carried by the arm 52 and delivered to the inlet of the suction injection pipe 53, where it is sucked.

Immediately before this delivery, the injection of the blowing nozzle 48 is stopped. The defective weft yarn Y sucked into the suction jet pipe 53 is further subjected to the action of jet air and drawn through the grip portion between the end faces of the winding rollers 54 and 55 (FIG. 6).

When the defective weft Y is passed through the grip portion in this manner, the output of the sensor (not shown) or the like stops the injection of the suction injection pipe 53 after a predetermined time. Then, after a predetermined time, the winding roller 54 is moved downward by the cylinder 58 to come into pressure contact with the winding roller 55, and the weft Y is held between them.

Next, the suction / injection pipe 53 is swung so that its tip is directed tangentially to the circumferential surfaces of the winding rollers 54, 55, and then the injection of the suction / injection pipe 53 is restarted.

Then, the drive side winding roller 55 is rotationally driven by the motor 57. As a result, the driven-side winding roller 54 also rotates. Thus, the weft Y is wound around the winding rollers 54 and 55 while the defective weft Y is pulled in the winding direction by the jet of the suction jet pipe 53. As a result, the defective weft yarn Y is pulled out from the attitude control nozzle 18.

Finally, the completion of winding is known by detecting the absence of yarn by a sensor, and the winding rollers 54 and 55 are opened by the air cylinder 58. The rotation of the winding rollers 54 and 55 by the motor 57 is stopped.

As a result, the defective weft Y, which has been gripped and wound by the winding rollers 54 and 55, is released, and is blown into the jet air of the suction jet pipe 53 while being sucked into the suction pipe 56. To be removed.

After that, the injection of the suction injection pipe 53 is stopped and the suction of the suction pipe 56 is stopped, and the defective weft removing operation in the apparatus of this embodiment is completed as described above.

Regarding the operation of the loom after the defective weft is removed, after the new yarn feeder 1 is fed to the use position by the yarn feeder supply device 25, the first weft threading as shown in FIG. 7 is performed. Operation (pulling operation of the weft Y from the new yarn feeder 1 to the vicinity of the measuring storage device 3) and a second weft drawing operation (from the measuring storage device 3 to the weft guide pipe) as shown in FIG. 41 through the posture control nozzle 18), and by the subsequent restarting of the loom, further weaving to align the weft ends (Fig. 9) and rotating the rotary yarn guide 8 The winding process (FIG. 10) of winding the weft Y around the drum 5 is executed, but the details will be omitted.

As described above, in this embodiment, when the defective weft is removed, air is jetted from the weft outlet side of the drum 5 to the weft inlet side of the drum 5 by the jet nozzle 46, so that the weft cutting portion Y ′ is It is possible to remove the defective weft yarn Y without entwining it.

[0055]

[Effect of device]

 As described above, according to the present invention, when a weft break occurs in the section from the yarn feeder to the length measuring storage device, fluid is jetted from the weft pulling side of the drum of the length measuring storage device to the weft winding side. As a result, the cut end of the weft thread located in the length measuring and storage device does not become entangled with the weft thread part that was previously wound around the drum, and the defective weft thread removal operation can be performed smoothly, and the loom restarts. Will be certain.

[Brief description of drawings]

FIG. 1 is a schematic view showing a structure of a loom including a defective weft removing device according to an embodiment of the present invention.

FIG. 2 is a plan view of the main part of FIG. 1 viewed from the direction of arrow A.

FIG. 3 is a cross-sectional view of essential parts taken along the line BB of FIG.

FIG. 4 is a view showing a state of the apparatus of FIG. 1 when cutting a weft thread.

FIG. 5 is a diagram showing an initial stage of a defective weft removing operation of the apparatus of FIG.

FIG. 6 is a diagram showing the latter half of the defective weft removing operation of the apparatus of FIG. 1;

FIG. 7 is a diagram showing a first drawing state of a new weft after the weft is removed.

FIG. 8 is a view showing a second pulled-through state following FIG. 7;

FIG. 9 is a diagram showing a shed processing state after the weft thread is pulled through.

FIG. 10 is a view showing a winding state following FIG. 9;

11 is a diagram showing a main part of FIG. 1. FIG.

FIG. 12 is a view of the drum shown in FIG. 12 viewed from the weft drawing side.

[Explanation of symbols]

 Y Weft 3 Length measuring storage device 10 Weft pulling device 11, 12 Roller 18 Attitude control nozzle (main nozzle) 46 Nozzle 75 Photoelectric sensor 100 Control device

Claims (1)

[Scope of utility model registration request] 1. A defective weft removing device for a loom that removes, through a main nozzle, the weft stored in a drum of the length measuring and storing device when a weft break occurs in a section from a yarn feeder to the length measuring and storing device. A defective weft removing device for a loom, characterized in that, when the weft is removed, an injection nozzle for ejecting a fluid from the weft drawing side of the drum of the length measuring and storing device toward the weft winding side is provided.