JP3204148B2 - Spinning machine piecing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piecing apparatus for automatically splicing cut spun yarn in a spinning machine for producing spun yarn using a swirling air flow.

[0002]

2. Description of the Related Art Conventionally, when a spun yarn is cut in a spinning machine that manufactures a spun yarn using a swirling air flow, an upper yarn on a spun side and a lower yarn on a take-up side are drawn out, and the upper yarn is removed. A piecing method or the like in which a lower thread is introduced into a knotter to perform piecing is known.

[0003] Recently, in a spinning machine for producing spun yarn using a swirling air flow, a piecing method in which an upper yarn and a lower yarn are merged is disclosed in Japanese Patent Application No. 4-325022. . However, in this method, the spun yarn drawn from the package is transferred to the outlet side of the spun yarn of the spindle member of the spinning machine, and when the spun yarn is passed through the spindle member, the spun yarn is grasped. It was insufficient to control the attitude of the leading end of the yarn projecting from the pair of rollers to be sent out.

[0004]

The above conventional piecing method has the following problems. In other words, in the method of performing piecing using a knotter, since the yarn is stopped during piecing, it is necessary to store the upper yarn during spinning, and the knotting operation for piecing is also performed. The time required is unsuitable for modern spinning machines that produce spun yarn at high speeds. Also, the method disclosed in Japanese Patent Application No. 4-325022 is suitable for a high-speed spinning machine for splicing by joining upper and lower yarns. If the length of the yarn protruding from the pair of rollers that grips and feeds the spun yarn that has been drawn out is long, the posture of the tip becomes unstable, and threading through the hollow portion of the spindle may fail, There was a problem with the stability of piecing.

[0005]

In order to solve the above problems, according to the first aspect of the present invention, there is provided a means for stopping a drive of a spinning unit in which a yarn break has occurred, a means for pulling out a spun yarn from a package, Means for transferring the transferred spun yarn to the outlet side of the spun yarn of the receiving spindle member, means for passing the transferred spun yarn through the spindle member, and means for resuming driving of the spinning unit. consists of the feed roller, the roller pair, to be able to change the feeding direction of the spun yarn is gripped, one roller
Rolls over the surface of the other roller, and
The spun yarn drawn from the cage is fed from the feed roller.
The gist of the present invention is to provide a piecing device for a spinning machine capable of swinging in a direction in which the protrusion length is reduced . Therefore,
The tip of the spun yarn held by the roller may hang or
Without extending and entanglement with other members.
Roller is securely transferred to the spindle member.
The head can be swung in the feed direction, so the spin
It can be transferred to the handle member, which is effective for stabilizing piecing.

According to a second aspect of the present invention, in the first aspect of the invention, the feed roller is configured so as to be able to freely contact and separate.
It consists of a pair of rollers . Therefore, thread break
For pulling out spun yarn from the package when
The feed roller receives the spun yarn pulled out by the feed roller.
When taking, take the spun yarn with the roller separated
This makes it possible to reliably transfer the yarn, which is effective for the stability of piecing.

[0007]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is an enlarged view of a feed roller according to the present invention. FIG. 2 is an enlarged view showing the difference in the length of protrusion of the yarn from the roller when the roller grips the spun yarn and when the yarn is transferred to a spindle member and swung. FIG. 3 is a front view of the piecing apparatus and the spinning machine to which the present invention is applied. FIG. 4 is a schematic side view of the spinning unit U and the piecing device P. FIG. 5 is a schematic front view of the spinning unit U and the piecing device P. FIG. 6 is an enlarged view showing a draft roller section and a spindle section of the spinning section. FIG. 7 is an enlarged view when the transferred spun yarn is passed through a spindle member, and FIG. 8 is an enlarged view showing that the air soccer As descends and the yarn end is sucked into the defibration tube after the threading. FIG. FIG. 9 is a perspective view when the transfer arm member Ta, which is a means for receiving and transferring the spun yarn after the spun yarn is drawn from the package, receives the spun yarn.

First, a spinning machine to which the present invention is applied will be described with reference to FIGS. As shown in FIG. 3, the spinning machine has a configuration in which a large number of spinning units U are arranged, and a sliver L is sent to a draft device D and a spinning unit Sp.
After being formed into a spun yarn Y, the spun yarn Y is wound around a winding section W via a nip roller Rn and a slab catcher Z. P is a piecing device described later, and is configured to run below the inside of the spinning machine along the longitudinal direction of the spinning machine.

As shown in FIG. 6, the draft device D is a so-called 4-wire draft device comprising a back roller Rb, a third roller Rt, a second roller Rs having an apron, and a front roller Rf, and is supplied via a sliver guide T. This is a device for extending the sliver L to a predetermined thickness. The sliver L drafted to a predetermined thickness is supplied to a spinning unit Sp including a nozzle member N and a spindle member S, and is formed into a spun yarn Y in the spinning unit Sp.
The spindle member S is held by a support member h at the tip of a rod r of the cylinder Cs, and is configured to be separable from the nozzle member N as described later.

The spindle member S includes a stationary or rotating hollow spindle s, and the nozzle member N has a plurality of air injection holes from which compressed air is directed toward the tip of the hollow spindle. The spun yarn Y is formed by the swirling flow generated by the injection, but will not be described in detail here. The embodiment described below is for a stationary hollow spindle.

Next, a piecing device that runs along the longitudinal direction of a spinning machine in which a large number of spinning units U having the above-described spinning units Sp are arranged detects a spinning unit U in which a yarn break has occurred, and performs piecing. 4 and FIG. 5 will be described in detail.

When a yarn defect is detected by the slab catcher Z, or when the slab catcher Z detects a yarn breakage due to poor spinning, first, the electromagnetic clutch Ch for controlling the driving of the back roller is turned off, and the back roller Rb rotates. Is not transmitted, and the supply of the sliver L is stopped. When the yarn breakage signal is sensed, the piecing device P running in the machine stand stops at the spinning unit U where the yarn breakage has occurred, and performs piecing (yarn splicing).

The broken spinning unit U is connected to a sliver L
Is stopped, the spindle member S is separated from the nozzle member N by the cylinder Cs, and the package 5 held on the cradle arm 6 rotatable about the shaft 8 is separated from the winding drum 7 and is in a standby state. However, the mechanism is not described in detail here. A nip roller R for feeding spun yarn from the spinning unit Sp to the winding unit
n is configured to be able to contact and separate from the delivery roller Rd, but is normally in contact with the roller, and the contact-separation is mechanically controlled by a lever device mounted on the piecing device during piecing. It is configured as follows.

The piecing device P can be driven by a drive wheel 14 on a rail 13 passed over a frame 12 below the spinning machine, and has two pairs of rotatable guide rollers 1.
5a and 15b are guide rails 1 installed on a spinning machine main body.
6 and the piecing device P
Maintain a stable posture. The piecing device P
A package pushing member J for separating the package 5 from the winding drum 7 to rewind the spun yarn Y wound into the package 5 from the package 5 of the spinning unit in which the yarn breakage has occurred, and for holding the package 5 at that position. , A package reversing member R for reversing the package 5 separated from the winding drum 7 in a direction opposite to the winding direction.
w, a suction member Su for pulling out the yarn end of the spun yarn Y from the package 5, and the spun yarn Y drawn from the package 5
At a predetermined position, and the spindle member S of the spinning unit Sp
And a pneumatic soccer member As for threading the spun yarn Y through the hollow spindle s of the spindle member S of the spinning unit Sp. Some of the air soccer members are provided with a defibrating tube for defibrating the tip of the spun yarn Y threaded through the hollow spindle s, and can be selected as necessary.

In the piecing operation by the piecing device P, first, the package pushing member J is brought into contact with the package 5 by a cam mechanism of the piecing device body (not shown) to position the package 5. Then, the yarn end suction mouth 17 constituting the suction device Su rotates and approaches the package 5, and the reverse rotation roller Rw rotates the package 5 in the spun yarn unwinding direction to cut the yarn and wind the yarn. Suction the end. As shown in FIG. 9, the suction end 17 of the yarn end suction mouth 17 has a suction slit 17a having a length substantially equal to the width of the package 5 at the end thereof, so that the yarn end can be sucked by suction from a blower (not shown). It has become.

When the yarn end suction mouth 17 that has sucked the yarn end as shown in FIG. 4 turns upward and enters a standby state, as shown in FIG.
The transfer arm member Ta receives the thread end after being guided and held at a predetermined position. When the yarn end is gripped by the drive roller 1 and the driven roller 2 which are a pair of feed rollers included in the tip head member k of the transfer arm member Ta, the yarn end is cut by the cutter 18 mounted on the guide member Gu. The length of the yarn end projecting from the feed roller is made constant. When the transfer arm member Ta grasps the yarn end in this manner, the transfer arm member rotates upward about the fulcrum 9 and transfers the yarn end to the flared rear end 10 of the spindle s.

As shown in FIG. 5, the transfer arm member Ta is constituted by a motor m for rotating operation, a cylinder t for reciprocating in the horizontal direction, a connecting operation member q, a connecting member v, a tip head member k and the like. ing. A detailed description of the mechanism will not be provided here. The positioning of the package 5 by the package pushing member J and the rotation of the yarn end suction mouse 17 are all performed by a cam mechanism built in the piecing device P, but the details thereof will not be described here.

A front end head member in which the yarn feed roller according to the present invention is incorporated will be described with reference to FIGS.
The tip head member k in which the yarn feed roller is built is rotatable about a fulcrum 9 (see FIG. 4) in the piecing device P via a connecting member v and is horizontally rotatable (direction of arrow A). Reciprocation is possible as described above. The head member k includes a driving roller 1, a driven roller 2, a motor 1a, a cylinder 2a, a fixed frame 3,
When receiving the yarn end, the driven feed roller 2 is separated from the drive feed roller 1 as shown in FIG. 1 when receiving the yarn end, so that the yarn end can be easily received. Rotational movement (direction of arrow B) of contact and separation of the driven roller 2 with the drive roller 1 is performed by a cylinder 2a about a fulcrum 2b as a rotation center. The cylinder 3a swings the roller pair (in the direction of arrow C).
The arm member 4 to which the driven roller 2 is fixed so that the rotation can be performed with the center axis of the drive roller 1 as the center of rotation, is configured via a metal bearing 4a with respect to the drive roller shaft.

When the yarn end suction arm 17 sucks the yarn end and rotates upward, and the sucked yarn end is guided by the guide member Gu, as shown in FIG. 9, the transfer arm Ta moves horizontally and the transfer arm Ta moves horizontally. Go to pick up the yarn end. When the transfer arm Ta moves horizontally and the pair of yarn feed rollers enters the guide member Gu, the driven end of the driven roller 2 comes into contact with the drive roller 1 by the cylinder 2a, thereby gripping the end of the yarn. . In this gripped state, the length Y1 of the thread end tip is long as shown in FIG. The transfer arm Ta holding the yarn end
Turns upward to guide the yarn end to the rear end portion 10 of the spindle s in a trumpet shape. If the roller pair rotates without swinging at this time, FIG. , The driven roller is at the position 2A, the yarn end is like YA, and the driving roller 1 and the driven roller 2A
However, in the present invention, the driven roller moves the surface of the driving roller 1 in the direction of the arrow shown in FIG. I decided to make a swinging motion so that it rolled and came to the position of 2B. At this time, the driven roller rotates while rolling on the surface of the drive roller 1 such that the thread end gripped by the pair of rollers moves on the surface of the drive roller 1 so that the grip point moves to the tip of the thread end. In order to perform the movement, the yarn end protruding from the pair of rollers comes to the position of YB shown by the bold line in FIG. 2B, and the length is reduced to about the length of Y2. When the yarn end is guided to the rear end portion 10, the yarn end does not contact or interfere with other parts,
The threading described later can be reliably performed.

When the yarn end is passed through the spindle s, the yarn is fed by driving the driving yarn feed roller 1 by driving the motor 1a, and by sucking the air sucker member As as shown in FIG. The air soccer member As is mounted on the piecing device P and is configured to be able to reciprocate to the tip of the spindle s by a cylinder member (not shown).
No. 325022 and will not be described in detail here. At this time, if the length of the yarn end protruding from the roller pair is long, the yarn end may not be properly introduced into the spindle s, and the piecing may be unstable.
As shown in (2), Y2 could be reduced, and the yarn end could be reliably introduced into the spindle.

FIG. 8 shows that after the air sucker member As sucks the yarn end Y, it descends a little, and the yarn end Y is drawn by the defibration tube Ak.
This is a drawing in which the fiber is sucked and defibrated, but defibration may not be required depending on the type of yarn. The air soccer member As
Compressed air is supplied to the defibration tube Ak by an air pipe (not shown). When the yarn ends are sucked into the defibration tube Ak as shown in FIG.
k, compressed air is supplied only to the air soccer member A
s is controlled not to be supplied. For this purpose, the yarn end Y which was initially sucked into the air soccer section
When the air sucker member As descends and the defibrated tube Ak comes to the front of the spindle s, the defibrated tube Ak is sucked by the defibrated tube Ak.

When the threading in the spindle s is completed, the supply of the compressed air to the air sucker member As is stopped, the air sucker member As descends and is accommodated in the piecing device P, and the spindle member S is moved into the nozzle by the cylinder Cs. The preparation for the start of spinning is completed by combining with the member N. At this time, the yarn feed roller rotates so that the yarn end protruding from the tip of the spindle s by a predetermined length can maintain the length, and the package reverse rotation roller Rw is rotationally driven so that the package 5 is removed from the package 5 as necessary. The spun yarn Y is rewound. Thereafter, the driven feed roller 2 constituting the yarn feed roller is separated from the drive feed roller 1, and retreats in the horizontal direction, separates from the yarn path of the spun yarn, rotates downward and returns to its original position.

At the start of spinning, first, the electromagnetic clutch Ch for controlling the back roller is turned on, and the back roller Rb is driven to start supplying the sliver L. After the supply of the sliver L is started, compressed air is supplied to the nozzle member N after a predetermined time. When the compressed air is supplied to the nozzle member N, a swirling flow is generated, and a suction force is generated at the inlet portion n of the nozzle member N to suction the tip of the drafted sliver L and move toward the spindle member S. Will be transported.
At the moment when the spun yarn Y, which is threaded through the spindle s and is in the standby state, and the tip of the sliver L merge, the nip roller Rn is brought into contact with the delivery roller Rd and the package 5 is brought into contact with the winding drum 7. Then, when the winding is started, the newly supplied fiber is connected to the tip of the spun yarn Y and spun as a continuous yarn.

[0025]

As described above, according to the present invention,
When piecing (yarn splicing) is performed by a piecing device in a spinning unit in which a yarn break has occurred, when a yarn end pulled out of a package is transported by a pair of feed rollers, the roller detects the yarn end held by the pair of feed rollers. The thread end can be swung so that the feed direction can be changed, and the yarn end that protrudes from the feed roller is rotated in a direction to reduce the length thereof. The thread end is stably formed to form a hollow thread path when the thread end is threaded into the spindle by driving the feed roller and suctioning the air sucker at the tip of the spindle. This has been introduced into the spindle, which has made it possible to perform reliable piecing.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a feed roller according to the present invention.

FIGS. 2A and 2B are diagrams when the feed roller grips a spun yarn, wherein FIG. 2A is an enlarged view when a yarn end is received from a yarn end suction mouth, and FIG. FIG.

FIG. 3 is a front view of a piecing device and a spinning machine to which the present invention is applied.

FIG. 4 is a schematic side view of a spinning unit U and a piecing device P.

FIG. 5 is a schematic front view of a spinning unit U and a piecing device P.

FIG. 6 is an enlarged view showing a draft roller unit and a spindle unit.

FIG. 7 is an enlarged view when the transferred spun yarn is passed through a spindle member.

FIG. 8 is an enlarged view showing that the air soccer As descends after the threading and the yarn ends are sucked into the defibration tube.

FIG. 9 is a perspective view illustrating a state where the transfer arm member Ta receives the spun yarn.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive roller 2 driven roller 3 fixed frame 3a cylinder 5 package 7 winding drum 17 yarn end suction mouth Sp spinning unit N nozzle member S spindle member Rn nip roller Rd delivery roller P piecing device As air soccer member Gu guide member J package pushing member Su Suction member Ta Transfer arm member Rw Package reversing member L Sliver Y Spun yarn

Claims (2)

(57) [Claims] 1. A means for stopping the driving of a spinning unit in which a yarn break has occurred, a means for pulling out a spun yarn from a package, a means for transferring the drawn out spun yarn to an outlet side of a spun yarn of a receiving spindle member, and the transferring. Means for passing the obtained spun yarn through the spindle member and means for restarting the driving of the spinning unit, wherein the transfer means comprises a pair of feed rollers, and the roller pair changes the sending direction of the spun yarn being gripped. So that one roller rolls over the surface of the other roller.
Spinning, and spinning
Reducing the length of the yarn that protrudes from the feed roller
A spun yarn piecing device characterized in that it can be swung in any direction . 2. An apparatus according to claim 1, wherein said feed roller is configured to be able to freely contact and separate.
The piecing device of a spinning machine according to claim 1 , comprising a pair of rollers .