JPH06116837A - Nontwist feeder for weft yarn of loom - Google Patents

Abstract

PURPOSE:To obtain a weft yarn feeder for a loom designed to enable the storage of fed yarn in an always constant amount in a state of no twist and an ultralow tension. CONSTITUTION:Yarn (Y) positively fed with a feed roller 9 and a pinch roller 14 is placed in a meandering state on the top surface of a conveyor belt 42 transferred at a set speed along the upper part of a yarn supporting pedestal 35 in a screenlike form, alternately hung in the form of U on both sides of a yarn supporting pedestal 42, stored in this state and then delivered to a loom. A storing area of the yarn (Y) is formed in a duct 37 having air streams to fix the yarn (Y) to the conveyor belt surface 42 and fluff, etc., sticking to the belt surface 42 with the air streams is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention mainly absorbs flat fiber bundles such as carbon fibers and narrow tapes as wefts of a loom from a yarn feeding package to absorb tension fluctuation due to intermittent yarn feeding to the loom. And a device for supplying the yarn without twisting.

[0002]

2. Description of the Related Art Conventionally, as a weft supply device used for weaving a carbon fiber woven fabric, a yarn Y drawn in a tangential direction by a method called "rolling" from a yarn supply package P as shown in FIG. The stationary pulleys 102 and 103 axially supported on the support base 101 and the slider 105 vertically moving along the support column 104 are wound around the moving pulley 106 axially supported, and the vertical movement of the moving pulley 106 causes the loom to move once. It is known that the yarn Y corresponding to the driving length is stored and is intermittently driven into the loom. (Tokuhei 4-44023
(See issue)

[0003]

In the above-mentioned conventional weft supply device, the yarn driving speed reaches about 5 to 10 m / s with the progress of the loom, and this is intermittently performed, so that the moving pulley is moved. 106, the inertial force of the slider 105 or the sliding resistance between the slider 105 and the column 104 may cause a rapid change in tension, which causes a problem in driving with low tension.

In the case of a single specification device, it is impossible to change the driving length per time, that is, 2m / 1 time width specification makes 3m / 1 time driving impossible, and 3m / 1 time specification 2m.
It was unreasonable to use it once.

[0005]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the problems of the above-mentioned conventional weft supply device, and a package holding means for rotatably supporting the yarn supply package and the yarn supply package. From the feed roller, which continuously draws the yarn in the tangential direction from the feed roller, and across the narrow conveyor belt running along the upper edge of the partition-shaped yarn support on the downstream side of the feed roller in the width direction of the belt. Traverse means for placing the yarn in a meandering shape while traversing the yarn,
And a traverse means for traversing the yarn in a width wider than that of the conveyor belt in conjunction with the transfer speed of the conveyor belt. The yarn that is positively fed by the feed roller is stored while hanging down in a U-shape alternately on both the left and right sides of the yarn support, and the mesh formed by the conveyor belt wound between two pulleys. This is an endless belt, which is used to place and transfer yarn.
It is characterized in that the turning and returning portion is arranged in an air duct connected to the intake means so that the air flow passes from the back surface of the belt toward the yarn mounting surface.

[0006]

The operation of the weft-untwisting feeder of the loom according to the present invention will be described below with reference to FIGS. 1 and 2.

When the present apparatus is manually started in preparation for weaving, the yarn Y drawn out tangentially from the yarn supplying package P is guided from the guide roller 8 into the air chamber 50 through the yarn passing hole 52 and the feed roller. 9 is pinched by the pinch roller 14 and sent positively downward, and is blown downward from the traverse nozzle 19 by the pressurized air in the air chamber 50. At this time, the conveyor belt 42 runs in synchronization with the feed rollers 9 from the front surface of the machine base 1 toward the tension pulley 47 side, and the traverse nozzles 19 temporarily suspend the traverse at both ends of the traverse while the conveyor belt 42 is on the conveyor belt 42. Then, in order to positively traverse the yarn Y in the width direction, the yarn Y is stored in the U-shaped hanging portions alternately distributed on both sides of the yarn support base 35.

Further, the yarn Y is fixed on the surface of the conveyor belt 42 due to the negative pressure generated by the centrifugal blower 39 at the portion which crosses over the conveyor belt 42, and the displacement of the front and rear and left and right positions thereof is prevented. As shown in FIG. 1, when the yarn Y is stored and the tip of the yarn Y is supplied to the loom side and the loom is started, the motor 31 is synchronously activated and necessary for one-time driving on the loom side. The yarn Y of the length is intermittently pulled out, and the yarn storage length on the support base 35 is controlled to be substantially constant by the actions of the photoelectric sensor 58 and the motor speed control circuit (not shown). , It can be stably fed to the loom in a non-twisted state.

For fluff, dust, etc. attached to the surface of the conveyor belt 42, the conveyor belt 42 causes the air tank 3
It is removed by the air flow passing through the mesh in the opposite direction as it passes through the inside of 7.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, 1 is a machine stand, 2 is a yarn feeding package P mounted on a beam 3 projecting from the side of the machine stand 1.
The holding means 2 is disclosed in Japanese Patent Laid-Open No.
No. 60573, a friction bearing 5 having the same structure as that of the above-disclosed winding ball unwinding device, the position of which can be adjusted along the guide rod 4, and the core holder 6 of the yarn supplying package P.
By rotatably supporting the other end of the shaft 7 that supports
The stopping torque of the shaft 7, that is, the unwinding tension value can be increased or decreased.

Reference numeral 8 denotes a guide roller which is rotatably supported on the upper portion of the machine base 1, and 9 is attached to the tip of a drive shaft 11 which is horizontally installed by the machine base 1 in parallel with the guide roller 8 via a bearing 10. With a feed roller,
On the outer surface of the roller 9, a pinch roller 14 rotatably supported on the swing side of a lever 13 which is urged by a spring 12 is pressed against the feed roller 9 in a state where the generatrix is parallel to the feed roller 9.

A traverse means 15 is provided below the feed roller 9 and the pinch roller 14 for traversing the yarn Y which is vertically transferred by the rollers 9 and 14 in the horizontal direction. A U-shaped bracket 18 attached to the tip of a traverse shaft 17 supported by a machine base 1 via a bearing 16 holds the upper portion of a tubular traverse nozzle 19 whose upper end is expanded in a trumpet shape. The cam follower 21 at the tip of the swing lever 20 connected to the end of
A cam shaft 23 supported by a bearing 22 on the machine base 1
By engaging with the grooved cam 24 fixed to, the rotational movement of the cam shaft 23 was converted into a swinging movement about the axis of the shaft 17 of the traverse nozzle 19.

The traverse nozzle 1 using the groove cam 24
The oscillating motion of No. 9 is intermittently interrupted at both ends of the traverse when the groove cam 24 rotates at a constant speed.

The cam shaft 23 is fixed to one end of the intermediate shaft 27 by engaging a bevel gear 25 attached to the end of the drive shaft 11 with a bevel gear 28 of an intermediate shaft 27 which is supported by a bearing 26. The worm wheel 29 is engaged with the worm gear 30 fixed to the end of the drive shaft 11 so as to interlock with each other, and the rotation of the drive shaft 11 driven by the motor 31 via the timing pulleys 32 and 33 and the timing belt 34 is significantly increased. It is decelerated to and transmitted to the camshaft 23.

Reference numeral 35 is a support stand projecting forward from the machine base 1 in the form of a partition having a length of about 1 m, a height of about 80 cm and a thickness of about 3 cm. It is formed in a hollow air duct 37 provided with an elongated air inlet 36, and its outlet 38 is connected to an air inlet 40 of a centrifugal blower 39 installed below the machine base 1 via a communication duct 41 and an air filter device A.

42 is arranged at the rear end of the air duct 37, and the timing pulley 4 is provided by the intermediate shaft 27.
2, a drive pulley 46 that positively rotates in the X direction shown in FIG. 2 via a timing belt 45, and a tension pulley 4 that is rotatably supported by the front end of the air duct 37.
7 is a mesh-shaped narrow width conveyor belt wound between the belt 42 and the belt 42, and a portion of the belt 42 running from below the traverse means 15 toward the tension pulley 47 covers the intake port 36 on the upper surface of the air duct 37. The portion that slides along the upper edge of the support base 35, is wound around the tension pulley 47, is turned downward, and is moved back toward the machine base 1 side is a slit opened in the center of the front and rear end faces of the air duct 37. 48,
The air duct 37 is made to pass horizontally through 49 to travel.

Incidentally, of the space inside the air duct 37, the portion surrounded by the conveyor belt 36 and the conveyor belt 3
The air outlet 38 and the space below 6 by separate air passages, respectively.
Connected to.

Reference numeral 50 denotes a box-shaped air chamber which is mounted on the front surface of the machine base 1 so as to cover the feed roller 9 and the pinch roller 14, and the upper portion of the chamber 50 is discharged from the centrifugal blower 39 via an air hose 51. In addition to introducing the compressed air to be introduced, a threading hole 52 for introducing the yarn Y between the feed roller 9 and the pinch roller 14 is provided on the side surface, and the upper end of the traverse nozzle 19 has a bellows at the opening on the lower surface. It is connected so as not to cause air leakage by using known means such as.

Further, 53 is a humidifier provided in the air chamber 50 so as to prevent the yarn Y from being charged, and its discharge port is connected to the outlet 38 of the duct 37 through the connecting pipe 54 to humidify the yarn. The steam generated by the device 53 and sent into the duct 37 is mixed with the outside air in the duct 37, sucked into the centrifugal blower 39, and blown into the air chamber 50 through the air hose 51.

Reference numeral 55 denotes a transparent cover attached to cover the upper portion of the thread support base 35, and the hanging portions on both sides thereof and the side surfaces of the thread support base 35 have a required thread passing gap, and the upper edge of the thread support base 35 is provided. The U-shaped hanging part of the yarn Y placed in a meandering state is movable, and the yarn Y is provided in the upper portion of the yarn guide hole 56.
It is pulled out from the yarn through the yarn guide link 57 and supplied to the loom side.

Reference numeral 58 is a photoelectric sensor provided below the air duct 37. When the U-shaped hanging portion of the yarn Y is transferred forward by the conveyor belt 42 and the front end position is detected by the sensor 58, the motor 58 The speed control is performed so that the set speed of 31 is automatically switched from the high speed side to the low speed side, and when the time set by the timer, for example, about 1 second, is automatically switched to the high speed side again, the speed is controlled on the thread support base 35. An almost constant amount of yarn Y was always stored.

When the loom stops due to a trouble such as yarn breakage, the motor 31 is stopped by receiving a stop signal from the loom side, and the yarn Y is stopped on the yarn support 35 while the set length is stored. I prepared for the next reboot.

Further, the yarn Y to be stored on the yarn support base 35
The length of can be freely changed by changing the meandering pitch of the yarn Y and the U-shaped hanging length depending on the balance between the speed of the motor 31 and the feed speed of the conveyor belt 42 and the speed of the traverse means 15. The meandering pitch of the yarn Y can be easily implemented by changing the pulley ratio of the timing pulleys 43 and 44, for example.

[0025]

According to the present invention, by the action of the conveyor belt which travels on the screen-shaped support base, and the traverse means for intermittently traversing the yarn which is positively fed by the feed roller onto the conveyor belt. , The yarn is laid down in a meandering shape by alternately hanging U-shaped yarns on both sides of the yarn support base, and the air flow that passes the yarns through the mesh of the conveyor belt at the portion where the yarns cross the conveyor belt. Since it is sucked in and fixed on the belt, the yarn can be supplied to the loom in an untwisted state with an extremely low tension.

The fluff of carbon fiber or the like adhered to the belt surface by passing the backward movement part of the conveyor belt through the air flow area in the duct to cause the air flow to flow from the back surface of the belt to the surface on which the yarn is placed. It is possible to remove dust and the like and prevent deterioration of the fixing action of the yarn on the belt surface due to intake.

Further, the amount of yarn stored on the yarn support base is controlled according to the speed of the loom, the length of the yarn required for one-time driving, that is, the length of the yarn supplied, which is approximately equal to the weft length of the loom. By changing the meandering pitch of the yarn and the U-shaped hanging length by exchanging the pulley etc., it is possible to easily adjust and respond.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention.

FIG. 2 is a side view of a main part cut away in the direction of arrow II in FIG.

FIG. 3 is a perspective view of a main part showing a conventional example of a weft supply device.

[Explanation of symbols]

2 Yarn supply package holding means 9 Feed roller 15 Traverse means (traverse nozzle) 35 Yarn support base 39 Intake means 42 Conveyor belt Y Yarn P P Yarn supply package

Claims (2)

[Claims] 1. A package holding means for rotatably supporting a yarn supplying package, a feed roller for continuously drawing a yarn from the yarn supplying package in a tangential direction, and a partition-like yarn downstream of the feed roller. Traverse means for placing the yarn on the conveyor belt in a meandering shape while traversing the yarn in the width direction of the narrow conveyor belt running along the upper edge of the support base, and the yarn on the conveyor belt And a traverse means for traversing the yarn in a width wider than the conveyor belt in association with the transfer speed of the conveyor belt, and the yarn is positively fed by the feed roller. A weft-untwisting supply device for a loom, characterized in that the yarns are stored while hanging down in a U shape alternately on both right and left sides of the yarn support base. 2. A conveyor belt is a mesh-shaped endless belt wound between two pulleys, on which yarns are placed and transferred,
The untwisted supply of the weft of the weaving machine according to claim 1, wherein the turning-backward-moving portion is arranged in an air duct connected to an intake means so that an air flow passes from the back surface of the belt toward the yarn placement surface. apparatus.