JPH0730697Y2 - Weft discharge device - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a drum type length measuring and storing device for a jet loom, and particularly to a device for discharging the weft yarn on the drum of the length measuring and storing device when the weft yarn is broken.

[Conventional technology]

In the drum type length measuring and storage device, when the weft yarn is cut during the operation, if the weft yarn remains on the drum, the weft yarn must be discharged to the outside.

The device of Japanese Utility Model Laid-Open No. 64-51681 is provided with a discharge pipe for discharging the weft. The discharge hole in the discharge pipe is provided so as to intersect at right angles with the yarn guide hole in the yarn guide tube provided between the length measurement storage device and the yarn feeder.

[Problems of conventional technology]

According to the above conventional device, since the resistance acting on the weft yarn on the yarn feeder side at the intersection of the discharge pipe is small, even when an air flow for discharging the weft yarn is generated in the discharge pipe, during pulling,
The weft yarn is easily pulled out from the yarn feeder side, which prevents the weft yarn on the drum side from being pulled back, or even when the weft yarn is pulled back, the amount of pulling of the weft yarn is reduced, and it becomes difficult to effectively discharge the weft yarn on the drum.

[Purpose of device]

Therefore, an object of the present invention is to enable the weft yarn to be efficiently pulled in the discharging direction when the weft yarn is discharged from the drum of the length measuring and storage device.

[Means for solving the invention]

Based on the above-mentioned object, the present invention, when discharging the weft yarn on the drum of the length-measuring device, rotates the rotating yarn guide in a direction opposite to the winding direction, and between the yarn feeder and the length-measuring device. In the process of generating a fluid traction force in the pullback direction of the weft yarn in the discharge pipe branched to the weft yarn guide tube provided on the As a resistance condition, the slip resistance from the discharge pipe to the rotary yarn guide is set to be smaller than the slip resistance from the discharge pipe to the yarn feeder to the weft. Here, the magnitude relation of this slip resistance is
It is set by the crossing angle of the discharge tube with respect to the yarn guide tube.

[Function of device]

When the weft yarn on the drum is discharged, the rotating yarn guide is rotated by the driving means in a direction opposite to the winding direction. At the same time, the discharge pipe generates a fluid traction force in the direction of pulling back the weft yarn in the rotating yarn guide due to the internal nozzle function. As a result, the weft yarn on the drum is drawn into the inside of the rotary yarn guide by the fluid traction force, and is discharged to the outside while being bent in a U shape at the inlet side of the discharge pipe by the flow of the fluid in the discharge pipe. In this discharge process,
The slip resistance for the weft thread from the discharge pipe to the yarn feeder is set to be larger than the slip resistance for the weft thread from the discharge pipe to the rotating yarn guide, so the weft thread being discharged is not pulled out from the yarn feeder side. , Pulled back from the drum exclusively.

Therefore, when the weft yarn is discharged, the discharged weft yarn is pulled back only from the drum to be removed and efficiently discharged to the outside.

〔Example〕

1 and 2 show a weft supply device 2 together with a weft discharge device 1 of the present invention.

This yarn feeder 2 pulls out a weft yarn 4 from two yarn feeders 3, measures a weft yarn 4 of a length necessary for weft insertion by a drum type length measuring and storing device 5, and stores the weft yarn 4 to store the weft yarn. Supply to the insertion nozzle 7. That is, between the two yarn feeders 3,
The weft thread 4 is thread-knotted at a winding start portion and a winding end portion, is guided from the one yarn feeder 3 to the inside of the yarn guide tube 6, passes through the weft yarn discharging device 1 of the present invention, and is then measured and stored. Guided to 5. The two yarn feeders 3 are respectively supported by a stand 8 in a predetermined direction, and the weft yarn 4 is held between them in a straight line by the two clampers 9, and these two clampers 9 have the same shape. Two cutters 10 can be used to cut on each clamper 9 side. The clamper 9 and the cutter 10 are supported by the bar 11 of the stand 8 so that their positions can be adjusted.

Then, the yarn guiding tube 6 is supported in a state of being placed on the two receiving members 22 of the fixed frame 12 in the retracted position as shown in the figure, and the two yarn guide tubes 6 rotatably provided on the frame 12 are provided. The parallel link mechanism consisting of the pin 13 and the two pins 14 of the two fixtures 16 attached to the yarn guide tube 6 and the parallel equal length links 15 connecting these pins 13 and 14 keeps the horizontal state. Thus, it is supported in a movable state from the retracted position to the advanced position up to the vicinity of the weft thread 4 between the two clampers 9. One link 15 pin 13
Is a drive side and is fixed to one end of the drive arm 17. The other end of the drive arm 17 is rotatably connected to a piston rod 19 of a drive cylinder 18 by a connecting pin 20. The drive cylinder 18 is swingably supported by a horizontal support shaft 21 on the back side of the frame 12.

A suction nozzle 23 is attached to the tip of the yarn guide tube 6. As shown in FIG. 3, this suction nozzle 23 is fixed to the yarn guiding tube 6 at one end of a nozzle tube 24, has a nozzle body 25 at the tip end side of this nozzle tube 24, and is provided on the outside of these. It is configured by combining two nozzle bodies 26 and 27, and takes in air as the fluid 37 from the fluid intake port 28 and ejects the fluid in the direction of the arrow to generate a fluid traction force inside the nozzle body 25. .

Next, the weft yarn discharging device 1 of the present invention is shown in FIGS.
As shown in FIG. 4 in addition to the drawings, the main body 29 is assembled. The main body 29 faces the end face of the yarn guiding tube 6 at one end of the internal guide hole 30, communicates with the hollow rotary shaft 31 of the length measuring and storing device 5 at the other end, and has an intermediate portion. It also branches to the discharge hole 33 of the discharge pipe 32.

The discharge hole 33 of the discharge pipe 32 has a crossing angle of an acute angle α with respect to the guide hole 30 of the main body 29 on the yarn feeder 3 side, that is, on the yarn guide tube 6 side, in order to satisfy the condition of the slip resistance against the weft yarn 4. In addition, an obtuse angle β is formed at the portion on the side of the length measurement storage device 5. The discharge pipe 32 is internally provided with a suction nozzle pipe 34 and a suction nozzle body 35, and is fixed by a ring-shaped cover 36. In addition, when the fluid traction force is generated, the fluid 37 flows into the fluid intake port 38.
Is fed into the space outside the suction nozzle body 35 inside the suction nozzle pipe 34. The central opening portion of the suction nozzle tube 34 faces the guide tube 39 attached to the cover 36 at an appropriate interval. A cutter 40 is arranged near the cover 36 on the opening side of the suction nozzle pipe 34. This cutter 40 is attached to the discharge pipe 32 by the cutter holder 41.
It is attached to the solenoid and can be driven by a solenoid 42 or the like.

Next, the length measurement storage device 5 is of a stationary drum type,
A hollow rotating yarn guide 44 is driven by a motor 45 as a driving means on the outer circumference of a stationary drum-shaped drum 43, for example. The rotating yarn guide 44
Is attached so as to communicate with the central hole of the hollow shaft 31, and rotates together with the hollow shaft 31 driven by the motor 45. During length measurement storage, the weft yarn 4 is locked by the locking pin 46 on the outer peripheral surface of the drum 43, and is released by the retraction of the locking pin 46 by the solenoid 47. The motor 45 is driven by a controller 48 at a predetermined speed via a driver 49, as shown in FIG.

During the yarn feeding operation, the weft yarn 4 is pulled out from any one of the yarn feeding bodies 3, passes through the inside of the yarn guiding tube 6, the guide hole 30 and the inside of the hollow shaft 31, passes through the inside of the rotary yarn guide 44, and is locked. pin
It is locked by 46 and guided to the weft insertion nozzle 7 of the loom.

During the length measurement storage operation, the rotating yarn guide 44 is driven in the winding direction by the motor 45, and the drum 43 in a stationary state is driven.
By rotating around the
Is pulled out, and the weft yarn 4 is wound on the drum 43 while being locked by the locking pin 46, and the length is measured, and the yarn is stored until the weft insertion timing. At the weft insertion timing, the locking pin 46 is driven by the solenoid 47 and the drum 43
When the weft yarn 4 in the stored state is released from the outer peripheral surface, the weft yarn 4 in the stored state is released from the drum 43 and becomes ready for weft insertion by the weft insertion nozzle 7.

By the way, when the weft yarn 4 is broken between the length measuring storage device 5 and the weft insertion nozzle 7, the length measuring storage device 5 receives a control command for stopping and locks the weft yarn 4 with the locking pin 46. Stop the operation automatically. In this stopped state, the drum 43
In order to remove the weft yarn 4 when the weft yarn 4 remains, the controller 48 winds the rotary yarn guide 44 while feeding back the rotation amount signal from the encoder 60 provided on the rotation shaft of the motor 45. Rotate in the opposite direction at the required speed for the amount required for removal. At the same time, compressed air is sent as the fluid 37 into the fluid intake port 38, and a fluid traction force in the discharge direction is generated in the discharge hole 33 inside the discharge pipe 32. Therefore, the guide hole 30 of the main body 29
The inner weft yarn 4 is bent into a U-shape and drawn into the discharge hole 33, enters the suction nozzle body 35, rides on the flow of the fluid there, and is folded in two toward the guide tube 39. It is sent as it is. In this guiding process, the weft yarn 4 is pulled in from the drum 43 side, and at the same time, is also pulled out from the yarn feeder 3 side via the yarn guiding tube 6. However, here, since the forming direction of the discharge hole 33 is set to the acute angle α on the yarn guiding tube 6 side and the obtuse angle β is set on the rotating yarn guide 44 side, the weft yarn 4 is attached to both end portions of the guide hole 30. From discharge hole 33
In the process of bending into the inside of the U shape, a large slip resistance, a so-called bending resistance, is received at the acute angle α portion, and a smaller slip resistance is obtained at the obtuse angle β portion. , Is not pulled out from the yarn feeder 3 side, is pulled back only from the outer periphery of the drum 43, is efficiently removed from the drum 43, and is discharged. Therefore, in this discharging process, the weft yarn 4 is not wasted from the portion of the yarn feeder 3. Even in the process of discharging the weft thread 4, the locking pin 46 is
It is in contact with the peripheral surface of the drum 43, and the weft thread 4 remains locked. Therefore, in the process of discharging the weft thread 4, the weft thread 4 comes into contact with the outer peripheral surface of the locking pin 46 and slides there while being discharged. In this way, the weft yarn 4 is not paid out from the yarn feeder 3 side, and the drum 43
Only from the side, passes through the inside of the discharge pipe 32, and
It will be in the state of being pulled to 39. After that, the cutter 40 operates to cut and remove the excess weft thread 4. Thereafter, the suction nozzle pipe 35 inside the discharge pipe 32 stops the suction operation, and the suction nozzle 23 generates an air flow in the guiding direction of the weft yarn 4 inside the yarn guiding pipe 6, whereby the guide holes 30 and The weft thread 4 inside the discharge hole 33 is moved in the direction of the hollow shaft 31 and the rotary yarn guide 44 together with the air flow, and threaded. After that, the weft thread 4 threaded through the rotary yarn guide 44 is fed to the weft insertion nozzle 7 by a device (not shown).
And is pre-wound on the side of the length measuring and storing device 5 in preparation for the next weft insertion.

When the weft yarn 4 is cut between the yarn feeder 3 and the length measuring and storing device 5 during the yarn feeding, the drive cylinder 18 moves the piston rod.
19 is extended, the drive arm 17 is rotated counterclockwise in FIG. 2, the parallel link 15 is driven, and the yarn guiding tube 6 is separated from the end face of the guide hole 30. The suction nozzle 23 is brought closer to the weft thread 4 between the two clampers 10 by translating it in the forward direction. In this state,
The suction nozzle 23 generates a fluid pulling force in the nozzle body 25 in the suction direction, that is, in the guide direction of the weft thread 4 by the fluid 37, so that the weft thread 4 between the clampers 9 is generated.
Pull in. During this drawing, the cutter 10 on the side of the yarn feeder 3 during yarn breakage cuts the weft yarn 4 between the two clampers 9. As a result, the new weft yarn 4 on the side of the yarn feeder 3 is drawn into the suction nozzle 23, is removed from the clamper 9 by the pulling force, and is drawn into the yarn guide tube 6. After that, the suction nozzle 23 stops the suction operation, the yarn guide tube 6 returns to the retracted position, and the main body at the rear end portion.
It is connected to 29 guide holes 30. At this time, the weft yarn 4 inside the yarn guide tube 6 rides on the flow of the fluid 37 by the suction nozzle 23 which has started the operation again, passes through the guide hole 30 and the hollow shaft 31,
The rotating yarn guide 44 passes through the inside of the rotating yarn guide 44.
Threaded inside. After that, threading and preliminary winding operations for the weft insertion nozzle 7 are performed as described above.

[Other Examples]

The yarn guide tube 6, the guide hole 30, and the hollow shaft 31 may be arranged in a straight line without being bent in the right angle direction.

Further, the material for the guide hole 30 and the discharge hole 33 or the processing of the surface thereof may be appropriately changed so as not to limit the structure in which the slip resistance member is adhered. The suction nozzle body provided in the discharge hole 33 may be of a type in which an air flow is blown into the discharge hole 33 as shown in Japanese Utility Model Laid-Open No. 64-51681.

[Effect of device]

In the present invention, since the slip resistance at the portion from the discharge hole to the rotary yarn guide side is set to be smaller than the slip resistance to the weft yarn at the portion on the yarn feeder side from the discharge hole of the discharge pipe,
In the process of drawing the weft yarn into the U-shape by the suction nozzle body into the discharge hole, the weft yarn is drawn only from the path with small slip resistance, that is, from the drum side of the length measurement storage device.
The weft yarn from the yarn feeder side is not wastefully consumed, and the weft yarn discharging operation is effectively performed.

In particular, the slip resistance of the weft yarn at the time of discharging can be set to [the yarn feeder side> the drum side] with a simple structure in which the discharging hole is provided at a predetermined crossing angle with respect to the guide hole. Moreover, even if the slip resistance is set to the above relationship, the relationship of [slip resistance on the yarn feeding side> slip resistance on the drum side] occurs only after the weft thread is inserted into the discharge hole in a U-shape. In addition, there is no adverse effect on the running of the weft yarn during weaving.

[Brief description of drawings]

FIG. 1 is a plan view of a weft yarn discharging device and a yarn feeding device, and FIG.
The figure is a front view of the supporting portion of the yarn guide tube, FIG. 3 is a sectional view of the suction nozzle, FIG. 4 is a sectional view of the weft yarn discharging device, and FIG. 5 is a block diagram for driving the motor of the length measuring and storing device. is there. 1 ... Weft yarn discharging device, 2 ... Yarn feeding device, 3 ... Yarn feeder, 4 ... Weft yarn, 5 ... Length measuring storage device, 6 ... Yarn guide tube, 7 ... Weft insertion nozzle, 23 ... … Suction nozzle, 29 ……
Main body, 30 ... Guide hole, 31 ... Hollow shaft, 32 ... Discharge pipe, 33
...... Discharge hole, 35 …… Suction nozzle body, 40 …… Cutter, 43
...... Drum, 44 …… Rotating yarn guide, 45 …… Motor.

Claims (1)

[Scope of utility model registration request] 1. A drive means for rotating a rotating yarn guide of a length measuring and accumulating device in a direction opposite to a winding direction, and a weft yarn guiding hole between the weft yarn feeder and the length measuring and accumulating device provided in a branched state. And a suction nozzle body which is provided in the discharge hole and generates a fluid traction force in a direction to pull back the weft yarn in the rotary yarn guide, and the discharge hole intersects the guide hole with the discharge hole. A weft yarn discharging device characterized in that the angle is acute on the yarn feeder side and is branched so as to be an obtuse angle on the rotary yarn guide side.