JP3307029B2 - Defective weft insertion yarn removal device for fluid jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing a defective weft insertion yarn of a fluid jet loom.

[0002]

2. Description of the Related Art In a fluid jet loom, when a defect in weft insertion is detected during weft insertion, cutting of a weft by a cutter at the tip side of a weft insertion nozzle is prevented, and the next weft insertion is prevented. And stop the loom. Then, the main shaft of the loom is reversed to open the warp yarns, thereby exposing the poorly inserted weft yarns that are continuous in the warp row from the tip of the weft insertion nozzle to the cloth fell. Therefore, from this state, it is necessary to pull out and remove the defective weft insertion yarn from the warp row.

For example, Japanese Patent Application Laid-Open No. 62-177258 and Japanese Patent Application Laid-Open No.
An apparatus described in JP-A-3-21957 is known. In this device, a winding pin is projected in a radial direction from a rotary drum disposed at a predetermined position between the tip of a weft insertion nozzle and a warp row, and a weft insertion defective yarn is captured by the winding pin.
The defective weft insertion yarn is pulled out of the warp row by winding the weft-defective yarn from the warp row and the weft drawn from the weft storage device side through the weft insertion nozzle on the left and right drum surfaces of the winding pin. . Then, after winding the poorly inserted weft yarn, the yarn on the drum is cut by a cutter arranged in the drum, and the cut yarn is removed by suction through a suction cover covering the drum by a suction pipe connected thereto. ing.

[0004]

However, in such a conventional apparatus for removing a defective weft insertion yarn, a defective weft insertion yarn from the warp row is wound on the left and right drum surfaces by winding pins protruding from a rotary drum. And the weft on the side of the weft storage device, there is a problem that the weft on the side of the weft storage device is wasted about one pick.

[0005] Further, since the cutter rotates together with the rotary drum, the structure becomes complicated and maintenance becomes troublesome. Further, there is a problem that the cost is increased.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus for removing a defective weft insertion yarn which suffices to remove only a defective weft insertion yarn and can simplify the structure.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a fixed drum disposed at a predetermined position close to a defective weft insertion yarn between a weft insertion nozzle and a warp row at least when a defective weft insertion yarn is removed; A winding arm that winds around the fixed drum and wraps around the fixed drum while guiding the poorly inserted weft yarn by traversing the poorly inserted weft yarn between the weft insertion nozzle and the warp row,
A fluid jet type is provided, comprising: a cutter for cutting a defective weft insertion yarn wound around the fixed drum at a predetermined position on the fixed drum; and a removing means for removing the defective weft insertion yarn cut by the cutter on the fixed drum. A weft insertion defective yarn removing device of a loom is configured.

[0007]

In the above arrangement, the poorly inserted weft yarn between the weft insertion nozzle and the warp row is engaged by the winding arm rotating around the fixed drum, and then the poorly inserted weft yarn is set by this winding arm. , Is wound around a fixed drum, and the defective weft insertion yarn is pulled out and removed from the warp row. Then, the defective weft insertion yarn wound on the fixed drum is cut by a cutter, removed by a removing means, and discharged out of the system.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the loom viewed from the weft insertion side during a normal operation, and FIG. 2 is a side view of the loom viewed from the weft insertion side when a defective weft insertion yarn is removed. 1 and 2, 1 is a weft insertion side frame of a loom, 2 is a weft insertion nozzle (for example, a water jet nozzle), 3 is a heald, 4 is a warp, 5 is a reed, 6 is a weaving cloth, and 7 is a weaving cloth. Is shown.

A bracket 11 is fixed to an upper end of a column 10 erected on the upper surface of the weft insertion side frame 1 of the loom, and a rotating shaft 12 is supported by the bracket 11 so as to be able to reciprocate in a reciprocating angle. Then, a forward / reverse rotatable motor held by the bracket 11
13 bevel gears (not shown) fixed to the tip of the output shaft;
By engaging a bevel gear (not shown) fixed to the rotating shaft 12, the rotating shaft 12 reciprocates angularly by the forward / reverse rotation of the motor 13. By fixing the base end of the swing arm 14 to the rotating shaft 12, the forward rotation of the motor 13
By the reverse rotation, the swing arm 14 swings.

At the tip end of the oscillating arm 14, an apparatus unit 15, which is a main part of the yarn removal device for defective weft insertion, is held. During normal operation, the oscillating arm 14 is swung upward as shown in FIG. The device unit 15 is retracted to the upper part of the loom by the movement, and when the defective weft insertion yarn is removed, the device unit 15 is held at a position immediately above the weft insertion nozzle 2 by swinging the swing arm 14 downward as shown in FIG. Is coming. FIG. 3 is a side view of a main part (device unit 15) of the weft insertion yarn removing device when the defective weft insertion yarn is removed, as viewed from the side opposite to the weft insertion side.

Reference numeral 16 denotes a lamp, which is turned on when the swing arm 14 swings downward and the device unit 15 is brought to the position for removing the defective weft insertion yarn. Is to be announced. Next, the device unit 15 which is a main part of the weft insertion defective yarn removing device will be described with reference to FIGS. 4 to 10 in addition to FIGS.

FIG. 4 is a front view of the device unit 15 corresponding to the view taken in the direction of the arrow A in FIG. 3, FIG. 5 is a cross-sectional plan view corresponding to the sectional view taken along the line BB of FIG. 4, and FIG. FIG. 7 is a front longitudinal sectional view corresponding to the C sectional view, FIG. 7 is a side view corresponding to the DD sectional view of FIG. 4, FIG. 8 is a side view corresponding to the EE sectional view of FIG.
FIG. 6 is a side view corresponding to the FF cross-sectional view of FIG. 4. However,
In FIG. 4, the rotation position of the winding arm 28 described later is different from the other drawings. FIG. 10 is a side view of the device unit 15 viewed from the side opposite to the weft insertion side when the winding arm 28 is rotated differently from FIG.

As shown in FIG. 5, the apparatus unit 15 includes a base plate 17 fixed to the tip of the swing arm 14, a bracket 18 fixed to the front of the base plate 17, and a motor fixed to the rear of the base plate 17. 19 and
Further, a drum 20 is fixed to the side of the weft insertion side of the base plate 17 and the bracket 18. Here, the drum 20 is fixed so that its axis is parallel to and above the defective weft insertion yarn between the weft insertion nozzle 2 and the four rows of warp yarns (near the tip of the weft insertion nozzle 2). (See FIG. 4).

The drum 20 has a circumferential groove 21 having a V-shaped cross section on its outer peripheral surface. Then, the bottom of the peripheral groove 21 on the upper side of the drum 20 is cut out to form a deep groove 22 (see FIG. 8), and the groove is formed as a substantially semicircular groove as a whole. A plurality of pins 23 are implanted along the arc-shaped bottom of the circumferential groove 21 having a V-shaped cross section and slightly outside the bottom so as to cross the circumferential groove 21 having a V-shaped cross section at an appropriate interval. The defective weft insertion yarn is wound on these pins 23. A plurality of ribs 24 are radially formed on a side surface of the peripheral groove 21 having a V-shaped cross section on the side of a later-described winding arm 28 so as to form a convex portion (see FIG. 9).

The rotation shaft 25 extends through the center of the drum 20.
The rotating shaft 25 is rotatably supported by bearings 26 and 27 provided on both sides of the bracket 18. An arm wound around the end of the rotating shaft 25 protruding outside the drum 20
28 is fixed. The winding arm 28 bends the peripheral edge of a disk-shaped base 29 attached to the end of the rotating shaft 25 toward the drum 20 so as to cover the drum 20, and a winding direction from a part thereof is shown in FIG. With the claw part diagonally in the counterclockwise rotation direction
After the claw portion 30 is engaged with a poorly inserted weft yarn between the weft insertion nozzle 2 and the four rows of warp yarns (near the leading end of the weft insertion nozzle 2), the base portion 29 and the claw portion are formed. Recess 31 with 30
Thereby, the weft insertion defective yarn is guided. Further, the base portion 29 is not a perfect circle, but protrudes a large portion (32) on the upstream side when viewed from the projection position of the claw portion 30 in the winding direction, so that the main nozzle 2 is rotated within a predetermined rotation range of the winding arm 28. It is a cover that covers the distal end (see FIG. 10).

The drive mechanism of the winding arm 28 (rotary shaft 25) will be described. As shown in FIG.
The bevel gear 34 is fixed to the output shaft 33 of the motor 19, and the bevel gear 34 is meshed with the bevel gear 35 fixed to the rotating shaft 25 of the winding arm 28. 28 can be rotated in the winding direction. An action piece 36 is attached to the rotating shaft 25, and the position thereof is detected by the proximity switch 37, so that the rotation speed and the stop phase of the winding arm 28 can be controlled.

As shown in FIGS. 6 and 8, the drum 20 is provided with a cutter storage space 38 having a rectangular cross section at a portion eccentric from the center thereof. It is arranged. The cutter 39 is connected to the drum 20
The movable blade 43 includes a fixed blade 41 fixed by a screw 40 therein and a movable blade 43 rotatable around a pin 42. Here, the fixed blade 41 and the movable blade 43 are opposed to each other across the deep groove portion 22 in an open state, and the movable blade 43 moves to the fixed blade 41 side,
Defective weft insertion yarn wound around the pin 23 and passed through the deep groove portion 22 can be cut.

The driving mechanism of the cutter 39 will be described. As shown in FIGS.
An eccentric cam 46 is attached to the boss of the bevel gear 34 fixed to the output shaft 33 of the 19 through a one-way clutch 45. The one-way clutch 45 includes a notch 47 formed on the outer peripheral surface of the boss portion of the bevel gear 34, and a leaf spring 49 protruding from a notch 48 formed on the inner peripheral surface of the eccentric cam 46. When the bevel gear 34 rotates clockwise in FIG.
The bevel gear 49 is bent into the notch 48 on the eccentric cam 46 side.
Although the rotation of 34 is not transmitted to the eccentric cam 46, when the bevel gear 34 rotates counterclockwise in FIG. 6 during the reverse rotation of the motor 19, the leaf spring 49 engages the notch 47 on the bevel gear 34 side. Thus, the rotation of the bevel gear 34 is transmitted to the eccentric cam 46.

Then, one end of a connecting rod 50 is rotatably attached to the eccentric cam 46 by fitting to the outer periphery thereof, and the other end of the connecting rod 50 is connected to the arm 44 of the movable blade 43 by a pin 51. It is. The connecting rod 50 has a return spring
The position of the eccentric cam 46 when the eccentric cam 46 does not receive the driving force is controlled by operating the movable blade 43 so that the movable blade 43 is opened at this time.

As shown in FIG. 8, a suction pipe 53 serving as a removing means is fixed to the swing arm 14 and its tip side is squashed flat so that the suction port 54 is formed in the circumferential groove 21 of the drum 20.
Inside, it is located near the cutter 39 and downstream from the cutter 39 in the winding direction. This suction pipe
As shown in FIGS. 1 and 2, a flexible pipe 55 is connected to the proximal end side of 53, and is connected to a suction port of a blower (not shown). As the blower, in a water jet loom, a blower for a dewatering cylinder for woven fabric dewatering can be used. The removing means may be a means for mechanically grasping the weft-defective yarn on the drum 20 and then removing it from the drum 20.

As shown in FIGS. 3 and 5, the winding arm
28, the winding arm 28 and the drum 20
A baffle plate 56 for covering is provided. Here, the baffle plate 56 has its base end bent in an L-shape and is fastened and fixed together with the motor 19. The lower edge of the baffle plate 56 is located below the rotation center of the winding arm 28 and extends to a position where only the weft insertion nozzle 2 can be seen when viewed from the opposite weft insertion side. In addition, on the anti-weaving front side (the right side in FIG. 3) of the lower edge of the baffle plate 56, the guide position of the poorly inserted weft yarn guided along the edge when the poorly inserted weft yarn is wound is regulated. A recess 57 is provided for this purpose. Then, the piece 59 of the limit switch 58 attached to the back side of the baffle plate 56 is positioned so as to close the recess 57, and the poor weft insertion yarn guided by the recess 57 is brought into contact with the piece 59, and When an over-tension occurs, the limit switch 58 is turned ON due to an increase in the displacement of the section 59.

The overhang (cover) 32 of the base 29 of the winding arm 28 extends from the lowest position where the claw 30 of the winding arm 28 passes in front of the weft insertion nozzle 2 until it reaches the highest position. 10, projecting downward from the lower edge of the baffle plate 56, as shown in FIG.
To cover the tip side. Next, the weft insertion defective yarn removing operation will be described.

When a weft insertion failure is detected during the weft insertion during normal operation of the loom, cutting of the weft by a weaving cutter (not shown) at the tip end of the weft insertion nozzle 2 is prevented, and And stop the loom. Then, the main shaft of the loom is reversed to open the warp yarns 4, thereby exposing the poorly inserted weft yarns continuing in the four rows of the warp yarns from the tip of the weft insertion nozzle 2 to the cloth fell 6. In addition, weft insertion nozzle 2
The weft gripper 8 (see FIG. 4) on the yarn supply side is closed to prevent the weft from being pulled out from the weft storage device side. However, in order to prevent the defective weft insertion yarn from coming off from the winding arm 28, the weft holding device 8 is opened before winding and the fluid is jetted from the weft insertion nozzle 2 for a predetermined period of time. May be ejected into the warp shedding.

Thereafter, the swinging arm 14 is swung downward by the motor 13 to bring the apparatus unit 15 to a position immediately above the weft insertion nozzle 2, whereby the drum 20 is brought into contact with the weft insertion nozzle 2 and four rows of warps. (In the vicinity of the leading end of the weft insertion nozzle 2) above the defective weft insertion yarn. At this time, the lamp 16 is turned on to notify that the defective weft insertion yarn is being removed. Further, at this time, the distal end of the claw 30 is disengaged from above the weft insertion nozzle 2 so that the distal end of the claw 30 of the winding arm 28 does not push down the poorly inserted weft thread so that the claw 30 cannot be engaged. The position is regulated as follows.

In this state, first, the motor 19 is rotated forward, and the output shaft 33 of the motor 19 rotates through the bevel gears 34 and 35 to rotate.
By driving 25, the winding arm 28 is rotated counterclockwise in FIG. Even if the bevel gear 34 rotates, the eccentric cam 46 does not rotate due to the direction of the one-way clutch 45 at this time, and the cutter 39 is kept open. By the rotation of the winding arm 28, first, the claw portion 30 engages with the poor weft insertion yarn between the weft insertion nozzle 2 and the four rows of warp yarns, and the claw portion 30 engages with the concave portion 31 between the claw portion 30 and the base 29. It guides poorly inserted weft yarns.

Since the weft is gripped by the weft gripper 8 (see FIG. 4) on the side of the weft insertion nozzle 2, the rotation of the winding arm 28 pulls out the defective weft insertion yarn from the four rows of warp yarns. Starting from the leading end of the weft insertion nozzle 2, the poorly inserted weft yarn is wound around the circumferential groove 21 of the drum 20. At this time, the poorly inserted weft yarn wound around the circumferential groove 21 of the drum 20 by the rotation of the winding arm 28 descends along the rib 24 on the side surface when entering the circumferential groove 21 of the drum 20, Specifically, it is wound on the pin 23. Therefore, not only the bottom surface side of the winding portion is floated by the pin 23, but also the side surface side is ribbed.
Since the weft is floated by 24, even if the poorly inserted weft yarn is wet with the weft insertion water, the contact area is small, so that sticking can be prevented. This facilitates suction removal described below.

The poorly inserted weft yarn pulled out from the four rows of warp yarns is guided by the lower edge of the baffle plate 56 and passes through the concave portion 57. Since the (recess 57) is shifted downward from the center of rotation of the winding arm 28, the winding arm 28 (recess 57) is moved from the lower edge (recess 57) of the baffle plate 56 depending on the rotation position of the winding arm 28. 31), which changes the pulling speed of the poorly inserted weft yarn.
That is, the pulling speed of the poorly inserted weft yarn is minimized in a section of about 90 ° upstream of the lowermost position where the claw portion 30 of the winding arm 28 passes in front of the weft insertion nozzle 2 in the rotation direction, and thereafter,
The towing speed increases while reaching the uppermost position, and decreases while returning from the uppermost position to the lowermost position. Therefore, the poorly inserted weft yarn can be intermittently pulled with the traction force varied depending on the traction force, so that an excessive force is not continuously applied to the poorly inserted weft yarn.
Easier to separate from

In the case where an excessive tension is applied to the defective weft insertion yarn for some reason, the defective weft insertion yarn increases the displacement amount of the piece 59 of the limit switch 58 in the concave portion 57 of the baffle plate 56 to limit the limit. The switch 58 turns ON. Therefore,
By turning on the limit switch 58, the rotation of the motor 19 is stopped to interrupt the weft insertion defective yarn removing operation, and this may be notified.

Further, if the poorly inserted weft yarn suddenly separates from the restraint of the warp 4 during winding of the poorly inserted weft yarn, the tension of the poorly inserted weft yarn suddenly decreases and rebounds to the winding arm 28 side. Although there is a risk of entanglement with the winding arm 28, the drum 20, or the weft insertion nozzle 2, a baffle plate 56 is arranged between the winding arm 28 and the four rows of warp yarns, and the rebounded weft insertion failure yarn is prevented by the baffle plate 56. By receiving, it is possible to prevent the winding arm 28, the drum 20, or the weft insertion nozzle 2 from becoming entangled.

The claw 30 of the wrapping arm 28 is
In the section at about 90 ° upstream of the lowermost position passing in front of the
Until the uppermost position is reached, the pulling speed increases. If the poorly inserted weft yarn suddenly separates from the restraint of the warp 4 during this increase, the tension of the poorly inserted weft yarn decreases more rapidly and the rebound increases. However, at this time, the overhanging portion (cover) 32 of the winding arm 28 covers the distal end side of the weft insertion nozzle 2, so that the weft insertion nozzle 2 can be prevented from being entangled.

After the rotation speed of the winding arm 28 reaches a predetermined rotation speed, or when it is detected by a sensor (not shown) that a defective weft insertion yarn has been pulled out of the warp row, the motor 19 is stopped. Then, the motor 19 is reversed. Then, the eccentric cam 46 is rotationally driven via the one-way clutch 45 by the rotation of the bevel gear 34 due to the reverse rotation of the output shaft 33 of the motor 19. Then, by the rotation of the eccentric cam 46, the movable blade 43 of the cutter 39 swings via the connecting rod 50, and a pinching and cutting motion is performed by cooperating with the fixed blade 41, and in the circumferential groove 21 of the drum 20, Pin 23
A plurality of poorly inserted weft insertion yarns wound around a plurality of times and passed through the deep groove portion 22 are cut together. In addition, the movable blade 43 is caused to perform the pinching and cutting motion a plurality of times to ensure the cutting.

The drum 20 is fixed, and the cutter 39
Does not change, the length of the next weft to be inserted from the leading end of the weft insertion nozzle 2 can also be defined by this cutting. During this cutting, the winding arm 28 rotates in the direction opposite to the winding direction due to the rotation of the bevel gear 34, but since the poorly inserted weft yarn has already been wound on the drum 20, only the idle rotation occurs. is there.

Then, immediately before this cutting, the suction pipe 53
, And the weft-defective yarn cut on the drum 20 is sucked through the suction port 54 and discharged out of the system. Here, since the suction port 54 of the suction pipe 53 is disposed near the cutter 39 and downstream of the cutter 39 in the winding direction, suction is ensured even if the suction area is small. On the other hand, if the suction port is arranged upstream in the winding direction with respect to the cutter, it is impossible to remove a poorly inserted weft yarn shorter than the last one.

After cutting by the cutter 39, the motor 19 is stopped.
19 is stopped at a fixed position, and the winding arm 28 and the cutter 39 are stopped at a predetermined phase (the state shown in FIG. 3). After this, the motor 13
As a result, the swing arm 14 is swung upward, and the device unit 15 is retracted above the loom. At this time, the lamp 16 is turned off.

As described above, the loom can be restarted.

[0036]

As described above, according to the present invention, it is sufficient to remove only a defective weft insertion yarn, and the amount of pulling out the weft yarn from the weft insertion nozzle side and discarding it wastefully is small. Also, since the drum is fixed, the cutter only needs to be fixedly arranged,
The structure can be simplified, and maintenance and the like become easy.

[Brief description of the drawings]

FIG. 1 is a side view of a loom viewed from a weft insertion side during a normal operation according to an embodiment of the present invention.

FIG. 2 is a side view of a loom viewed from a weft insertion side when a defective weft insertion yarn is removed.

FIG. 3 is a side view of the main part of the weft insertion defective yarn removing device as viewed from a side opposite to the weft insertion side.

FIG. 4 is a front view of a main part corresponding to a view on arrow A in FIG. 3;

FIG. 5 is a plan cross-sectional view corresponding to the BB cross-sectional view of FIG. 4;

FIG. 6 is a front longitudinal sectional view corresponding to the CC sectional view of FIG. 5;

FIG. 7 is a side view corresponding to a cross-sectional view taken along line DD of FIG. 4;

8 is a side view corresponding to the EE cross-sectional view of FIG.

FIG. 9 is a side view corresponding to the FF cross-sectional view of FIG. 4;

FIG. 10 is a side view of the main part of the yarn removing device with poor weft insertion viewed from the side opposite to the weft insertion side in a state in which the winding arm is rotated differently from FIG.

[Explanation of symbols]

 2 Weft insertion nozzle 4 Warp 14 Swing arm 15 Device unit 19 Motor 20 Drum 25 Rotary shaft 28 Wound arm 39 Cutter 53 Suction pipe 56 Baffle plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-177258 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D03D 51/00 D03J 1/04 B65H 49 / 00-49/38 B65H 54/00-54/88 B65H 75/00-75/50

Claims (1)

(57) [Claims] An apparatus for removing a poorly inserted weft yarn from a leading end of a weft insertion nozzle into a warp row after the occurrence of a poor weft insertion in a fluid jet loom, comprising: A fixed drum arranged at a predetermined position close to the defective weft insertion yarn between the weft insertion nozzle and the warp row, and crossing the defective weft insertion yarn between the weft insertion nozzle and the warp row around the fixed drum A winding arm that winds around the fixed drum while guiding the poorly inserted weft yarn, and a cutter that cuts the poorly inserted weft yarn that is wound around the fixed drum at a predetermined position on the fixed drum. And a removing means for removing the poorly inserted weft yarn cut by the cutter in (1).