JPS6135292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic yarn splicing method and device in a spinning machine.

Conventional technology Conventionally, as this type of automatic yarn splicing method, the cut end of the pipe yarn held on the spindle of a spinning machine is detected and taken out, and the taken out yarn end is used as a splicing yarn to create a fleece spun from a front roller. One is the direct splicing method, in which yarn splicing is performed by interlacing yarn with the spun yarn, and the other is a direct splicing method in which the automatic yarn splicing device holds in advance a supply tube for splicing wound with the same yarn as the spun yarn, and when a yarn breakage is detected. Supply pipe for yarn splicing A splicing method in which the yarn is pulled out from the yarn, wrapped around the bobbin where the yarn breakage occurred, and the end of the yarn pulled out through the traveler is used as splicing yarn and joined to the roving fleece being sent out from the front roller. It has been known.

In addition, there is a method of joining the splicing threads to the fleece.
Normally, in all of the above cases, a patch piecing method is used on the front bottom roller, and there is a method in which the fleece is joined while being pulled out using suction force, and an elastic piece is spliced on the front bottom roller before splicing. Common methods include bringing the fleece into contact with a roller to float it, or closing the suction port of a suction nozzle with an elastic piece to temporarily block the inflow of the fleece.

Problems to be Solved by the Invention However, regardless of whether a direct splicing method or a continuous splicing method is adopted, the following disadvantages have been recognized in the conventional splicing method.

First, upon detection of yarn breakage, the automatic yarn splicing device stops at the normal yarn splicing work position with respect to the spindle to be spliced, and in this state starts the joining operation of joining the yarn end of the spliced yarn and the fleece. However, since the fleece sent out from the front roller is normally moved left and right along the axial direction of the roller due to the traverse action, in conventional joining methods, the fleece is pulled out by an automatic splicing device. The relative position of the yarn end of the spliced yarn and the fleece may be misaligned, making it impossible to perform an accurate splicing operation. Even if the yarn splicing operation is completed, the seam may become thick or disordered, resulting in a significant change in the quality of the yarn. It was causing a significant decline.

The main object of the present invention is to provide an automatic yarn splicing machine for spinning machines equipped with a fleece position regulating means capable of solving the above-mentioned problems observed in conventional automatic yarn splicing methods and automatic yarn splicing devices. The purpose of the present invention is to provide a splicing method and device.

Means for Solving the Problems In view of the above object, the present invention provides a method for automatically splicing yarn by detecting yarn breakage and stopping a circulating automatic yarn splicing device at a predetermined position. The reciprocating movement of the traverse bar is interrupted by the entry signal to the yarn breakage generating machine table of the circulating automatic yarn splicing device, and the Shino guide is stopped at a predetermined position corresponding to the automatic yarn splicing operation. The end of the splicing thread that has been automatically pulled out from the bobbin is grasped using a known splicing thread pulling means, and the thread is inserted into the suction port of the pneumatic clearer, and then the fleece flowing into the suction port is An automatic yarn splicing method in a spinning machine that joins yarns by crossing the yarn ends of the splicing yarn, and a yarn splicing device installed in the middle of the power transmission path for the reciprocating movement of a traverse bar. A switching mechanism for the power transmission path is installed to temporarily stop the reciprocating movement of the traverse bar in response to an approach signal to the cutting machine stand, and a switching mechanism is installed in a part of the spinning machine corresponding to the traverse bar, and the switching mechanism stops the reciprocating movement of the traverse bar. a position regulating device for regulating the stopping position of the traverse bar so that the Shino guide on the traverse bar is at a predetermined position with respect to the suction port of the pneumatic clearer; A known splicing yarn pulling means for automatically pulling out a splicing yarn from a yarn splicing supply pipe, and a splicing yarn installed in a part of the automatic yarn splicing device main body to grasp the splicing yarn drawn out by the means midway. a gripping mechanism, and a fixed blade and a movable blade installed in a part of the automatic yarn splicing device main body to cut the end of the spliced yarn pulled out by the spliced yarn pulling means on the tip side from the gripping position of the gripping mechanism. A cutter mechanism and a joint installed in the main body of the automatic yarn splicing device so that they can be moved toward the suction port of the pneumatic clearer together with the gripping mechanism and can be moved in the cross direction with respect to the roving fleece during yarn splicing. The gist of this invention is an automatic yarn splicing device in a spinning machine, which comprises a mechanism for interlacing and joining yarn cut ends and roving fleece.

Example Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a front roller (middle roller and back roller are omitted from the illustration) constituting the draft part of the spinning machine, and 2 denotes a traverse bar provided with a guide 3 for feeding the roving s to the draft part. As shown in FIGS. 2A and 2B, the worm gear 4, which is rotatably supported on the out-end side of the spinning machine, is engaged with the worm 5 fixed to the tip of the back bottom roller, so that the worm gear 4 is rotated in the axial direction of the draft roller. The traverse bar reciprocates along the traverse bar with a predetermined width. Reference numeral 6 denotes a pneumatic tick located below the front of the front bottom roller 1a so as to align the axial direction with the front bottom roller.
A suction port 7 is provided on the central top surface of the flute of the clear roller, which faces the flute surface of the front bottom roller 1a. Traverse bar 2
The roving s fed to the draft part through the Shino guide 3 passes through the draft part, receives a predetermined draft during that time, becomes a fleece s', is heated by the rotation of a spindle (not shown), and is spun. It is wound onto a bobbin (not shown) as yarn. Thread cutting〓〓〓〓
When this occurs, the fleece s' that has left the front roller 1 is sucked into the flute 6 through the suction port 7 of the flute 6. During this time, thread protection continues to be performed on other weights where thread breakage has not occurred. As shown in FIG. 2, the power transmission path switching mechanism for temporarily stopping the reciprocating movement of the traverse bar during yarn splicing is comprised of a guide 8 fixed to the end of the traverse bar 2 and a switching mechanism of the guide 8. A pin 10 whose tip is loosely inserted into the groove 9 and whose base end is fixed to the worm gear 4, a support rod 11 which rotatably supports the worm gear 4, and a pin 10 which is fixed to the tip of the back bottom roller. It is composed of a worm 5 and a worm 5. The support rod 11 is fixed to the beam of the spinning machine, and supports the worm gear 4 rotatably, and also supports the worm gear 4 so as to be able to engage and disengage the worm 5. That is, the worm gear 4 is slidably attached along the axial direction of the support rod 11 fixed to the machine base, and the meshing engagement between the worm gear 4 and the worm 5 is achieved by retracting the support rod 11 as shown by the chain line. It is configured to come off. Note that the backward stroke to disengage the worm gear 4 from the worm 5 is performed by the traction action of a solenoid, for example, and the forward stroke to resume the meshing between the worm gear 4 and the worm 5 is performed by the tensile force of the return spring. It is caused by etc. By employing such a configuration, when the worm gear 4 is meshing with the worm 5, the pin 10, which rotates together with the worm gear 4 due to the rotation of the worm 5, gives the guide 8 a traverse movement in the left and right direction. Thus, the traverse bar 2 reciprocates along the weight row direction at a rate of once per rotation of the worm gear 4. On the other hand, when the worm gear 4 is detached from the worm 5, the traverse bar 2 interrupts the traverse movement along the weight row direction and stops. A position regulating device 12 is provided in order to regulate the stopping position of the traverse bar 2 with the Shino guide 3, which becomes movable and stops when the worm gear 4 and the worm 5 are disengaged, to a predetermined position. That is, Figure 2B
As shown in FIG. 2, the position regulating device 12 includes a pair of positioning members 12a, 12a, which are disposed opposite to each other on both sides of a guide 8 vertically fixed to the traverse bar 2. As shown in the figure, the positioning member 12a has a main body 13 provided with a protrusion 14 that can be moved forward and backward by engagement with a driving member such as a solenoid and a return spring, and both positioning members 1
2a and 12a are installed on both sides of the guide 8, with the protrusions 14 facing each other, with a gap that allows the protrusions 14 to come into contact with the side edges of the guide 8.

The worm 5 and the worm gear 4 are disengaged by activating a solenoid or the like in response to a signal when a yarn breakage is detected and the automatic yarn splicing device enters the yarn breakage generator table.
When the traverse bar 2 becomes movable and comes to a temporary stop due to disengagement between the worm gear 4 and the worm gear 4, the position regulating device 12 is activated, and the protrusions 14 of the both side positioning members 12a are advanced and come into contact with the guide 8. By doing so, the Shino guide 3 is stopped at a predetermined position within the width of the traverse bar. If the end of the splicing yarn that is automatically pulled out in this state is joined to the fleece, the yarn can be spliced without any joining errors. It is preferable that the stop position of the Shino guide 3 be at the center of the traverse width of the traverse bar 2. When the automatic yarn splicing device moves away from the yarn splicing finishing machine table after the yarn splicing is completed, the positioning member 12 is activated by a signal transmitted from the automatic yarn splicing device.
The protrusions 14, 14 of a, 12a retract, respectively,
At the same time, the worm gear 4 moves forward due to the tensile force of the return spring and starts meshing with the worm 5, thereby restarting the reciprocating movement of the traverse bar 2. The reciprocating movement of the traverse bar is stopped for each machine during the yarn splicing operation, thereby stopping the traverse of the fleece.

There is also a method in which the worm gear 4 is rotated by an independent motor 25 provided separately as another traverse bar driving means. That is, as shown in FIG. 3, the switch presser cam 23 is fitted onto the back bottom roller 30, and when the protrusion 23' of the cam 23 presses the limit switch 24, the independent motor 25 is rotated. The traverse bar 2 may be moved little by little via the worm 5 directly connected to the worm 25 and the worm gear 4 that meshes with the worm 5. Note that the worm gear 4 is designed to rotate once in about the same time as in the first embodiment. The traverse bar 2 in this second embodiment is stopped in the following manner. The independent motor 25 is started by the signal when the automatic yarn splicing device enters the machine, and the worm gear 4 and
The limit switch 28 is pressed at the tip of the switch presser lever 27 of the coaxially mounted slide wheel 26 to stop the Shino guide 3 of the traverse bar 2 at a predetermined position. When the yarn splicing operation is completed, the limit switch 24 is pressed by the switch presser 23 fixed on the back bottom roller 30, and the independent motor 23 is rotated by the signal from this switch operation, thereby restarting the reciprocating movement of the traverse bar 2.

The splicing yarn is pulled out from the fleece whose traverse has been stopped in accordance with the above procedure as follows.

As shown in FIG. 1, a gripping plate 15 and a gripping lever 1 grip the splicing thread y automatically pulled out from the bobbin.
A splicing yarn gripping mechanism 17 consisting of 6 is provided so as to be able to move forward and backward toward the front bottom roller 1a, and a cutter mechanism 20 consisting of a fixed blade 18 and a movable blade 19 is provided above this gripping mechanism 17. , the injection nozzle 21 and the suction pipe 22 are provided so as to be able to move forward and backward together toward the front bottom roller 1a, and when moving forward, the jet of air and the suction force are directed toward the suction port 7 of the flute 6 of the pneumatic clearer. Let it work.

The suction pipe 22, which is integrated with the splicing yarn gripping mechanism 17, the cutter mechanism 20, and the injection nozzle 21, is used as a joining mechanism for the cut yarn, and by operating these in synchronization, the ends of the splicing yarn are held at a fixed position. Perform splicing by joining the fleece that is being sucked into the flute. The yarn splicing operation will be described in detail below with reference to FIG.

As shown in FIG. 4A, the splicing yarn gripping mechanism 17 has a gripping plate 15 and a gripping lever 16 on standby at a predetermined position a predetermined distance from the front bottom roller 1a with a gap between them during normal operation. This gripping mechanism 17 is connected to a known automatic yarn splicing device (for example, a known automatic yarn splicing device (for example, Japanese Patent Publication No. 45-1999
The splicing yarn y is automatically pulled out using the known splicing yarn pulling means provided in
The movable blade 1 is passed from the upper edge of the fixed blade 18 of the cutter part 20 through the gap between the grip plate 15 and the grip lever 16.
9 and hold the drawer in a snaking shape.
Next, as shown in FIG. 4B, the gripping lever 16 is advanced toward the gripping plate 15, and the splicing yarn y is clamped by the contact between the two, and at the same time, the movable blade 19 is rotated and the fixed blade 18 and The joining yarn y is cut by the shearing action of. The joining yarn y is cut 2 to 3 cm from the yarn end. When the joining yarn y is cut, the fixed blade 18
The tip of the thread that remains after it is cut and twisted is bent several millimeters into a sharp chevron shape as shown in the figure. As the splicing yarn y is cut, the knee brake is released to restart the rotation of the spindle that fits and supports the bobbin, and the gripping mechanism 17 is advanced as shown in FIG. 4C to remove the gripped splicing yarn y. The end is brought close to the front bottom roller 1a, and its tip bent portion y' is brought close to the suction port 7 of the flute 6. At the same time, the suction pipe 22 is also moved forward to remove the front bottom roller 1.
a, and instantaneously inject air from the injection nozzle 21. As a result, the bent portion y' of the thread end of the joining yarn is sucked into the suction port 7 of the flute 6 at its bent root.
At this time, since the fleece s' being sent out from the front roller 1 is sucked into the same suction port 7, the bent part of the yarn end of the joining yarn is shown in FIG. 4C.
y′ and fleece s′ flow into the suction port 7 at the same time.

When the splicing yarn y is sufficiently twisted by the rotation of the spindle, the gripping mechanism 17 is slightly moved obliquely upward to bring the gripping plate 15 as close as possible to the front bottom roller 1a, as shown in FIG. 4D.
As a result, the bent portion y' of the splicing thread, which is being simultaneously sucked, is directed upwards (in the direction intersecting the fleece) with respect to the fleece s' being sucked into the suction port 7 of the flute 6.
Since it moves in such a way that it intertwines with the fleece s', the fleece s' and the yarn ends of the joining yarn y are automatically joined. Then, as shown in FIG. 4E, while performing the joining operation, the gripping lever 16 is moved back to release the gripping state of the joining yarn y. As a result, the twist is transferred to the splicing yarn y′ which has not been sufficiently twisted from the spindle, and the fleece intertwined with the splicing yarn y′ is further twisted.
The twist is transmitted to s′.

Furthermore, when the fleece s' and the splicing thread y' are entangled, the suction pipe 22 sucks air in the vicinity to lift the fleece s' and the thread ends of the splicing thread. This facilitates the intertwining function with the bent end y' of the thread. Furthermore, even when the gripping lever 16 is moved back and the splicing yarn is released, the splicing yarn is slightly brought into contact with the gripping plate 15, thereby acting to slightly weaken the tension transmitted from the spindle. This mutually promotes the above-mentioned joining action, ensuring a reliable joining action for the yarn.
Guaranteed production. When the yarn splicing is completed, the gripping mechanism 17 moves back while sliding slightly in the lateral direction to avoid contact with the spliced yarn, and returns to its original position.

FIG. 5 is a diagram showing an example of the operation timing of each element in the present invention, and the horizontal solid line in the figure represents that each element is in operation,
Vertical and horizontal dotted lines indicate the relative operating time relationship of each element.

Spindle knee brake, as shown in the drawing
Each element, such as the gripping mechanism, cutter mechanism, suction pipe, and injection nozzle, operates simultaneously or at appropriate time intervals to complete the yarn splicing.

Effects of the Invention As explained above, according to the present invention, the fleece guided out from the Shino guide attached to the traverse bar that stops at a predetermined position within the traverse width is automatically spliced by stopping the traverse during yarn splicing. The liquid exits the front roller from the predetermined position required for this purpose and is sucked into the suction port of the flute of the pneumatic clearer. Therefore, the fleece is positioned on the drawing line of the yarn end of the splicing yarn that is pulled out from the bobbin by the automatic yarn splicing device that enters and stops just before the weight of the yarn breakage, and the fleece is accurately entangled with the yarn end of the splicing yarn. Secure the operating position. In the method of the present invention, the thread ends of the splicing yarns can be intertwined with the fleece suctioned into the suction port immediately before the splicing yarns are separated, so the fleece splicing method is easier than the conventional automatic splicing method. The joining function between the fiber and the yarn end can be greatly strengthened. Furthermore, according to the present invention, the yarn end of the splicing yarn automatically drawn out from the bobbin is bent into a sharp chevron shape, and the bent root is inserted into the suction port of the pneumatic clearer to flow into the suction port. Joined to the fleece,
After that, by pulling out the joint part from the suction port and releasing it, the bent part of the yarn end of the splicing yarn spreads out, creating a state where the yarn ends of a small length are polymerized and intertwined with the fleece, causing seam irregularities. Guarantees a strong joint with no cracks.

The present invention stops the traverse bar during yarn splicing to fix the fleece at a predetermined position, and in addition, utilizes the suction action of the flute suction port of the pneumatic clearer without bringing the spliced yarn into contact with the front roller. The spun yarn is joined to the fleece by overlapping the spun yarn with the fleece and transmitting the twist while moving the yarn end of the joint yarn across the fleece. According to the present invention, automatic yarn splicing can be reliably performed without mistakes, and as a result, high-quality yarn with few seam irregularities can be manufactured.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of an apparatus suitable for carrying out the method of the present invention, Fig. 2A is a side view of the traverse bar portion thereof, Fig. 2B is a front view thereof, and Fig. 3 is the traverse bar and other parts thereof. FIG. 2 is a schematic perspective view of a driving example.
FIG. 4 is a schematic side view showing a thread splicing procedure according to the method of the present invention, and FIG. 5 is a diagram showing an example of the operation timing of each element in automatic thread splicing. 2...Traverse bar, 3...Shino guide, 6...
...Flute, 7...Suction port, 17...Gripping mechanism,
20... Cutter mechanism, 21... Injection nozzle, 2
2...Suction pipe, s'...fleece, y...joint thread, y'...bent part at the end of the join thread. 〓〓〓〓

Claims (1)

[Scope of Claims] 1. A yarn breakage generator for a circulating automatic yarn splicing device in a method of automatically splicing yarn by detecting yarn breakage and stopping the circulating automatic yarn splicing device at a predetermined position. The reciprocating movement of the traverse bar is interrupted by the entry signal to the table, the Shino guide is stopped at a predetermined position corresponding to the automatic yarn splicing operation, and the known splicing yarn pulling means provided in the automatic yarn splicing device is utilized. gripping the tip of the splicing yarn automatically pulled out from the bobbin and inserting it into the suction port of the new automatic clearer, and then moving the yarn end of the splicing yarn across the fleece flowing into the suction port. An automatic yarn splicing method in a spinning machine, which is characterized in that yarns are spliced by a spinning machine. 2. A power transmission path switching mechanism for temporarily stopping the reciprocating movement of the traverse bar in response to an approach signal to the yarn breakage generator of the automatic yarn splicing device, and a mechanism installed in a part of the spinning machine corresponding to the traverse bar. and a position regulating device that regulates the stopping position of the traverse bar stopped by the switching mechanism so that the Shino guide on the traverse bar is at a predetermined position with respect to the suction port of the pneumatic clearer, and an automatic yarn splicing device main body. A part of the automatic yarn splicing device is equipped with a known splicing yarn pulling means for automatically pulling out the splicing yarn from the supply pipe yarn for yarn splicing, and a part of the automatic yarn splicing device main body for grasping the splicing yarn pulled out by the means. and a part of the automatic yarn splicing device main body to cut the end of the splicing yarn pulled out by the splicing yarn pulling means on the distal end side of the gripping position of the gripping mechanism. A cutter mechanism consisting of a fixed blade and a movable blade, and an automatic yarn splicing mechanism that can be moved close to the suction port of the pneumatic clearer together with the above-mentioned gripping mechanism, and can be moved in a direction crossing the roving fleece during splicing. 1. An automatic yarn splicing device for a spinning machine, comprising an interlacing and joining mechanism for connecting a splicing yarn cut end and a roving fleece installed in the main body of the device.