JPH0544125A - Old roving cutter of roving exchanger - Google Patents

Abstract

PURPOSE:To cut monofilament constituting roving in a state by forming a roving guiding part in the top of roving jointing head and providing a jet nozzle for jetting compressed gas toward old roving introduced in the roving guiding part. CONSTITUTION:A compressed gas is jetted from a jet nozzle 14 toward old roving in a state where old roving during spinning is introduced into a roving guide groove 11 at the top of a roving joint head 2. One end of the old roving is held by a back roller and monofilament is cut at a prescribed position where jet stream is blown.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention exchanges a roving bobbin being spun on a creel of a spinning machine (spool) and a full bobbin suspended on a spare roving rail (spare roving). Prior to the replacement work by the roving yarn changer, the old roving yarn cutting device equipped in the roving yarn splicing device for performing the roving yarn splicing operation is described in detail. After cutting the thread,
The present invention relates to an old roving cutting device of a roving changer for performing a roving splicing (so-called splicing) method of inserting a new roving into a trumpet.

[0002]

2. Description of the Related Art In a spinning machine, especially a ring spinning machine, a roving yarn is drawn out from a roving reel wound on a creel and supplied to a draft part below. When the supply of roving to the draft part progresses and the roving winding becomes empty or approaches empty, it is necessary to replace it with a new roving winding.At that time, the roving end of the roving winding newly replaced with the roving being spun It is necessary to splice the roving. Conventionally, this roving splicing operation was generally performed manually, but in recent years, automation of the roving splicing operation has been proposed.

As a roving splicing method using a roving splicing machine, a new roving to be spliced in a roving (shino) guide groove of a roving (shino) splicing head is polymerized with an old roving being spun. Along with the feeding of the old roving, the overlapping part is guided to the back roller of the draft part, and after the new roving and the overlapping part of the old roving are held by the back roller, the old roving is held by the roving holding member. A method of cutting is proposed in JP-A-62-57957. However, in this method, the new roving is guided by the old roving and moves at the peripheral speed of the back roller, and there is a long waiting time until the overlapping section reaches the gripping position by the back roller through the trumpet, and the roving joining is completed. There is a problem that it takes time. In particular, when spinning a fine yarn of high-quality yarn, the spinning speed is slow and the peripheral speed of the back roller is slow, so that the roving joint time becomes long.

As a roving splicing method for solving this problem, a roving (old roving) connected from the roving winding during spinning to the trumpet of the draft part and a preliminary roving to be replaced with the roving are drawn. A roving splicing head that can hold the roving (new roving) is provided, and the roving splicing head is moved to a work position near the upper part of the draft part while holding the new roving, and spinning is performed at that position. Grasp and cut the old roving with the roving splicing head, then release the old roving while gripping the new roving,
A roving splicing method in which a roving splicing head is rotated to insert a new roving into a trumpet is disclosed in Japanese Patent Laid-Open No. 2-112426.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the roving splicing method disclosed in Japanese Unexamined Patent Publication No. 6 or the like, the end portion of the new roving thread gripped by the roving splicing head is positively inserted into the trumpet by the rotation of the roving splicing head. The time required for yarn splicing is shortened. However, the cutting of the old roving in this roving joining method is performed by rotating the roving joining head that holds the old roving being spun in a direction away from the back roller of the spinning machine. The roving yarn is cut at a weak portion somewhere between the back roller, which is the other gripping point, and the old roving yarn gripping point of the roving yarn splicing head.
Therefore, the old roving may be cut at an extremely short portion where the distance from the back roller to the cutting portion corresponds to the fiber length of the roving supplied to the spinning machine.

If the distance from the back roller to the cutting portion is short, the end portion of the old roving thread passes through the back roller before the new roving thread is fed to the back roller via the trumpet, and the new roving thread becomes old. The roving joint is unsuccessful because it cannot be overlaid on the yarn. Since the roving yarn is fed at a high speed when spinning the thick yarn, it is necessary to insert the new roving yarn at a high speed after cutting the old roving yarn, but the success rate becomes low with considerable difficulty. .. Also, if the cut end of the old roving is short, the old roving runs under the inner wall of the trumpet due to its own weight, which is not a convenient condition for inserting a new roving,
This hinders the smooth insertion of the new roving into the trumpet. Furthermore, when the cut end of the old roving yarn is short, as shown in FIG. 20, when the new roving yarn R2 is inserted into the trumpet 50, the end portion of the old roving yarn R1 is advanced to the inside of the trumpet 50. In this state, the position of the end of the old roving R1 is not fixed, and the end of the old roving R1 interferes with the end of the new roving R2, so that the new roving R2 can be smoothly inserted into the trumpet 50. Cause trouble.

In order to reliably cut the old roving yarn at a predetermined position where the end of the old roving yarn hangs down from the entrance of the trumpet to the outside by a predetermined length, it is conceivable to equip the roving yarn splicing head with a cutter. However, when the roving yarn is cut by the cutter, there are many fibers at the roving yarn end that are shorter than the distance between the grips of the rollers of the draft part, and the roving yarn in that part is not drafted but spun into a slab. However, there is a problem in that the ballooning of the portion is subject to a large centrifugal force during winding and the ballooning is rapidly changed to break the yarn. Further, there is a problem that it takes time to maintain and replace the cutter in order to prevent defective cutting due to wear.

The present invention has been made in view of the above problems, and an object thereof is to automatically carry out the succeeding operation, from cutting the old roving thread to inserting the new roving thread into the trumpet. You can surely cut the old roving at a position with a sufficient length,
Moreover, it is possible to perform the cutting without removing the single fibers constituting the roving, and to provide the old roving cutting device of the roving changer that does not require maintenance and replacement. is there.

[0009]

In order to achieve the above object, in the invention according to claim 1, a roving guide portion is formed at the tip of the roving splicing head, and the roving guide portion is introduced into the roving guide portion. An injection nozzle for injecting compressed gas toward the old roving was provided.

According to the second aspect of the invention, a roving yarn guide portion is formed at the tip of the roving yarn splicing head, and compressed gas is directed toward the upstream side of the old roving yarn introduced into the roving yarn guide portion. And an operating position for engaging the old roving introduced into the roving guide on the upstream side of the cutting position to guide the old roving to a position intersecting the injection direction of the injection nozzle. And a regulating member that is moved to a retracted position where the old roving cannot be engaged.

[0011]

According to the invention described in claim 1, the old roving yarn being spun in the draft part is introduced into the roving yarn guide groove formed at the tip of the roving yarn splicing head, and in that state, the coarse yarn is crushed from the jet nozzle. Compressed gas is jetted toward the old roving introduced into the yarn guide. Since one side of the old roving is held by the back roller, it is cut by the action of the jet airflow in a state where the movement on the back roller side is regulated, and the single fiber is unwound at a predetermined position where the jet airflow hits. ..

According to the second aspect of the present invention, the old roving being spun in the draft part is introduced into the roving guide groove formed at the tip of the roving splicing head, and then the old roving is ejected from the jet nozzle. Compressed gas is jetted toward the yarn. Since one side of the old roving is held by the back roller, it is cut by the action of the jet airflow in a state where the movement on the back roller side is regulated, and the single fiber is unwound at a predetermined position where the jet airflow hits. .. The restriction member is placed in the working position before the old roving is completely cut. As a result, the regulating member engages with the old roving yarn on the upstream side of the cutting position, and the old roving yarn crosses the jetting direction of the jet nozzle. Therefore, when the old roving is cut, the regulating member is engaged with the old roving on the upstream side of the cutting position. Therefore, the end portion of the old roving after cutting, which is continuous with the roving winding, is hooked by the regulating member and jetted. The airflow prevents the fibers from being pulled out of the old roving end or being blown up.

[0013]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS.

The roving yarn splicing device 1 is mounted on a roving yarn changing machine (not shown) which moves along a spinning machine stand to perform a roving yarn changing operation. As shown in FIG. 1, the roving splicing head 2 is rotatably supported by the tip of a support arm 3 of the roving splicing device 1.
Since the support arm 3 arranges the roving splicing head 2 at the roving splicing position above the draft part and the retracted position that does not hinder the movement of the roving yarn changer, it does not move with respect to the drive shaft 4 driven by a drive device (not shown). And is fixed to the base end of the support arm 3 so as to be integrally rotatable. As shown in FIG. 2, a substantially U-shaped mounting portion 3a is formed at the tip of the support arm 3, and the rotary shaft 5 is supported in a state of protruding laterally of the mounting portion 3a. A toothed pulley 6a is integrally rotatably fitted and fixed at a position corresponding to the inside of the mounting portion 3a of the rotary shaft 5, and the motor 7 fixed to the toothed pulley 6a and the base end of the support arm 3 is fixed.
The toothed belt 8 is wound around the toothed pulley 6b fitted to the drive shaft of the. Then, the roving splicing head 2 is integrally rotatably fixed to the rotary shaft 5 of the portion projecting to the side of the mounting portion 3a, and the roving splicing head 2 is rotated by driving the motor 7. There is.

A bulging portion 10a having an inclined surface which descends downward toward the rear side is provided at the tip of the head body 10 of the roving joining head 2.
Is formed, and the tip of the bulging portion 10a is formed into a shape that can enter the trumpet 9 (illustrated in FIG. 8 and the like). A roving thread guide groove 11 as a roving thread guide portion is formed at the tip of the head body 10 so as to extend in the longitudinal direction and the up-down direction of the head body 10. The bulging portion 10a has a notch 12 on one side with the roving guide groove 11 as a boundary, which communicates with the roving guide groove 11 and opens the roving guide groove 11 to the rear and side of the bulging portion 10a. Has been formed.

As shown in FIG. 4, the head main body 10 is formed with a block 13 having the cutout 12 as a separate body, and is integrally fixed to the head main body 10 by a screw or the like (not shown). As shown in FIG. 4 and the like, in the block 13, a flat concave portion 15 constituting an injection nozzle 14 for injecting a compressed air flow is provided above the cutout portion 12 and in front of the cutout portion 12 in the upper and roving guide grooves. 11 is formed in an open state, and the roving guide groove 11 side is covered with a plate 16. The plate 16 is fixed so as to be flush with the roving guide groove 11. A fitting hole 17 is formed in the block 13 so as to communicate with the recess 15 from the side opposite to the roving guide groove 11, and one end of the fitting hole 17 is connected to a compressed air source (not shown) such as a compressor. The other end of the pipe 18 is fitted. The pipe 18 is equipped with a control valve 19 capable of adjusting the flow rate as a control unit for controlling the injection timing of the compressed air from the injection nozzle 14. The injection nozzle 1
4, the pipe 18 and the control valve 19 constitute an old roving cutting device.

A support pin 20 is rotatably attached to the head body 10 at the rear of the bulging portion 10a so as to project to both upper and lower sides of the head body 10. Support pin 20
A gripping member 21 for gripping the new roving R2 is attached to the lower end of the head so as to be integrally rotatable at its base end, and a lever 22 is integrally rotatable at its one end with the lever 22 extending along the longitudinal direction of the head body 10. It is fixed to. The grip member 21 has its tip inserted into the notch 12,
The rotation of the support pin 20 causes the grip 21a to move into the roving thread guide groove 1.
1, a roving thread gripping position at which the new roving thread R2 is gripped in cooperation with one wall surface 11a of the roving thread guide groove 11 and the grip portion 2
1a is arranged so as to be able to move to a standby position where it retracts from the roving guide groove 11 and allows movement of the roving in the roving guide groove 11. As shown in FIG. 4C, a through hole 21b extending along the roving guide groove 11 is formed in the holding member 21, and a pipe 23 having one end connected to a compressed air source at the rear end of the through hole 21b. The other end of is connected. An on-off valve (not shown) is provided in the middle of the pipe 23.

A support block 24 (shown in FIGS. 2 and 3) is integrally rotatably fixed near the support arm 3 of the rotary shaft 5, and a support plate is provided between the support block 24 and the upper surface of the base end of the head body 10. 25 is fixed. A support 26 is erected on one end of the support plate 25 (close to the support arm 3), and a plate 27 is fixed to the tip of the support 26. An air cylinder 28 is attached to the plate 27 to form the head body 1.
The base end is supported via a support shaft 29 so as to extend in a direction orthogonal to 0. A piston rod 28 a of the air cylinder 28 is rotatably connected to the other end of the lever 22 via a pin 30. Then, the grip member 21 is rotated via the lever 22 by the operation of the air cylinder 28. A cover 31 that covers the lever 22 and the air cylinder 28 is attached to the roving yarn splicing head 2 via an attachment member (not shown) fixed to the support plate 25, and the tip of the cover 31 is the roving yarn guide. It extends to the vicinity of the base end of the groove 11.

The outlet 9a of the trumpet 9 is formed vertically so that the new roving R2 can sufficiently pass therethrough while the old roving R1 being spun is present. Next, the operation of the device configured as described above will be described. As shown in FIG. 2, the gripping member 21 is arranged at a standby position in which the gripping portion 21a is retracted from the roving guide groove 11 when the piston rod 28a is arranged at the retracted position. As shown in FIG. In the state in which 28a is arranged at the projecting position, the grip 21
a cooperates with one wall surface 11a of the roving guide groove 11 and is arranged at a roving gripping position where the roving can be gripped. When gripping the new roving R2 pulled out from the full bobbin, the gripping member 21 is arranged at the standby position as shown in FIG. 2, and the roving can freely enter the depth of the roving guide groove 11. Then, the new roving R2 is introduced deep into the roving guide groove 11. New roving R2
The air cylinder 28 is actuated in a state in which has been introduced deep into the roving guide groove 11, and the gripping member 21 is rotated counterclockwise in FIG. 2 together with the lever 22 by the projection operation of the piston rod 28a. Then, as shown in FIG. 3, the gripping portion 21a is arranged at a roving thread gripping position where it abuts on the other wall surface 11a of the roving thread guide groove 11, and the new roving thread R2 is gripped in cooperation with the other wall surface 11a. To do. New roving R2 is roving guide groove 1
In the state of being introduced to the back of 1, the other wall surface 11a is grasped by being pressed by the grasping portion 21a of the grasping member 21, so that it hardly moves when receiving the grasping action by the grasping member 21, and the new rough The tip position of the thread R2 becomes stable.

The gripping of the new roving R2 is performed at a position apart from the draft part on the front side of the spinning machine base, and after the gripping of the new roving R2 is completed, the support arm 3 is rotated by the drive shaft 4 to rotate the spinning frame. The roving splicing head 2 is tilted to the machine base side and moved to the roving splicing operation position near the upper part of the draft part. Since the cover 31 exists above the head main body 10, it is possible to reliably prevent the new roving R2 connected to the full bobbin from being bent or caught by the lever 22 or the like when the roving joining head 2 is moved.

When the roving splicing head 2 is moved to the roving splicing operation position, the old roving R1 being spun is introduced into the roving guide groove 11 as shown in FIG. In the state where the gripping member 21 is arranged at the roving thread gripping position, the old roving thread R1 is prevented from moving to the inner side from the tip of the gripping member 21 as shown in FIG. It is held at a position corresponding to the injection nozzle 14. After the roving splicing head 2 is arranged at the roving splicing operation position, the control valve 19 is opened at the same position, and the compressed air is jetted from the jet nozzle 14 at a predetermined pressure corresponding to the type of spun yarn. Since the ejection port of the ejection nozzle 14 faces upward, the ejection airflow acts to pull the old roving R1 upward. The old roving R1 is not gripped by the roving splicing head 2, but is acted on by the jet airflow in a state of being gripped by the back roller 32, and a predetermined distance from the jet airflow, that is, a fixed distance from the jet port of the jet nozzle 14. A state where the single fiber is bare at a distant position and is cut like a writing brush to obtain the state of FIG.

After cutting the old roving R1, the on-off valve of the pipe 23 is opened to inject compressed air from the through hole 21b, and the cut old roving R1 connected to the draft part is guided by the compressed air. While being pushed forward from the groove 11, the trumpet 9 hangs down by its own weight as shown in FIG. 7. Then, after the injection of the compressed air from the pipes 18 and 23 is stopped, the motor 7 is driven and the roving joint head 2 is rotated clockwise from the position shown in FIG. The roving splicing head 2 is rotated at a high speed until the tip of the new roving R2 approaches the trumpet 9, and then is rotated at a low speed and is gripped by the roving splicing head 2 as shown in FIG. The end of the roving R2 is inserted into the trumpet 9. In the state where the roving splicing head 2 is arranged at the new roving end introduction position to the trumpet 9 shown in FIG. 8, the end of the new roving R2 passes through the outlet 9a of the trumpet 9 and is held by the back roller 32. Reach The rotation speed of the roving splicing head 2 at this time is controlled so as to be substantially equal to or slightly faster than the rotation speed of the back roller 32. When the end portion of the new roving R2 is supplied to the back roller 32, the air cylinder 28 is operated and the gripping of the new roving R2 by the gripping member 21 is released. Then, the new roving R2 is passed through the back roller 32 in a state of being superposed on the old roving R1, and roving is spliced, and thereafter, the spinning is continued by the new roving R2. Since the single fiber is not cut at the end of the old roving R1 but is cut like a brush,
It passes through the roller part while being drafted between the front and rear rollers, no slab yarn is generated at the cutting portion of the old roving R1, and yarn breakage due to a sudden increase in size of the balloon is eliminated.

Since the old roving R1 is always cut at a position apart from the jet port of the jet nozzle 14 by a certain distance, the old roving R2 after cutting which is continuous with the back roller 32 hangs behind the trumpet 9, The new roving R2 after the old roving is cut even in the case of thick yarn spinning with a high roving supply speed.
The old roving R1 is inserted into the trumpet 9 when the new roving R2 is inserted even if the insertion into the trumpet 9 is not performed in a short time.
In this state, the new roving end is smoothly inserted into the outlet 9a of the trumpet 9.

Further, the length from the end of the old roving R1 after cutting to the back roller 32 is such that the old roving R1 is the roving guide groove 11
Can be adjusted by changing the position of the roving splicing head 2 when the compressed air is jetted from the jet nozzle 14 in the state of being introduced into the above, that is, the inclination of the roving splicing head 2. Further, in this embodiment, since the injection nozzle 14 is formed to be much wider than the thickness of the roving yarn, even if the old roving yarn R1 moves in the roving yarn guide groove 11 to some extent, the roving yarn is surely cut at the predetermined position. Done.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. 9 and 10. In this embodiment, the roving splicing head 2
The structure of the injection nozzle provided in the above and the point that compressed air is not injected from the holding member 21 are different from the device of the above embodiment. That is, the air supply housing 33, to which compressed air is supplied by the pipe 18, is fixed to the upper surface of the head body 10 at the rear end side of the roving guide groove 11, and the air supply housing 33 is fixed.
Is provided with a pair of injection nozzles 34a and 34b.
The base end is fixed in such a manner as to communicate with the air supply passage 33a so as to be sandwiched and extended. Both injection nozzles 34a, 3
4b is formed so that its tip is curved toward the roving guide groove 11 so that the compressed air jetted from the tip is injected in the direction in which the force for returning the twist to the old roving R1 acts. In addition, one jet nozzle 34a is formed longer than the other jet nozzle 34b. A control valve 19 similar to that of the above-described embodiment is provided in the middle of the pipe 18.

Therefore, in the apparatus of this embodiment, when compressed air is supplied from the pipe 18 while the old roving R1 is introduced into the roving guide groove 11, the injection nozzles 34a and 34b feed the old roving R1. On the other hand, the jet airflow acts from the direction orthogonal to the longitudinal direction. Therefore, when the number of the injection nozzles is one, the old roving R1 is larger than that in the case of operating along the longitudinal direction.
Is difficult to cut, but since the air currents acting in the directions for returning the twist of the roving yarn are respectively jetted from the two jet nozzles 34a and 34b, the old roving yarn R1 is reliably cut. Further, since the force of the jet air flow also acts on the direction in which the old roving yarn R1 is disengaged from the roving yarn guide groove 11, unlike the above-described embodiment, the old roving yarn R1 after cutting is disengaged from the roving yarn guide groove 11. The device is not necessary and the structure of the device is simple. In this embodiment, if the twisting directions of the roving yarns are opposite, the nozzles 34a, 3
The length of 4b is reversed.

(Third Embodiment) Next, a third embodiment will be described with reference to FIGS. In this embodiment, the roving splicing head 2
Is different from the first embodiment in that the old roving R1 can be held. The bulging portion 10a of the head main body 10 is connected to the roving yarn guiding groove 11 on the side opposite to the cutout portion 12 with the roving yarn guiding groove 11 interposed therebetween.
A notch portion 35 that is open to the rear and side of the is formed. As shown in FIGS. 11 and 13, both notches 12, 35
Are formed at positions shifted in the vertical direction, and the notch 35 located on the upper side is formed longer than the notch 12 located on the lower side. A support pin 36 is rotatably attached to the head body 10 in a state of protruding to the upper and lower sides of the head body 10 like the support pin 20, and an old roving thread gripping member 37 is integrally rotated at its base end at its lower end. The lever 38 is integrally rotatably attached to the upper end of the lever 38. The old roving yarn gripping member 37 has a tip end portion which is the cutout portion 35.
And a roving thread gripping position in which the gripping portion is inserted into the roving thread guide groove 11 by the rotation of the support pin 36 and cooperates with the wall surface of the roving thread guide groove 11 to grip the old roving thread R1. The gripping part is arranged so as to be movable to a standby position where it is retracted from the roving yarn guide groove 11 and allows the roving yarn to move within the roving yarn guide groove 11. The air cylinder 2 is placed on the plate 27.
A piston rod 39a of an air cylinder 39, which is supported so as to extend parallel to 8, is rotatably connected to the other end of the lever 38 via a pin 30. Further, at the tip of the gripping member 21, there is fixed a regulating member 21c for regulating the entry of the old roving R1 into the depth of the roving guide groove 11. The restricting member 21c is formed of a wire rod, and the bulging portion 10 is formed.
It is fixed in a state of extending below a, and when the gripping member 21 is arranged at the new roving thread gripping position, the gripping member 21 is arranged at a position intersecting with the roving thread guide groove 11, and the old roving thread R1 is deep in the roving thread guide groove 11. It is designed to control the entry into.

In the apparatus of this embodiment, the compressed air is jetted from the jet nozzle 14 while the old roving R1 introduced into the roving guide groove 11 is gripped by the old roving gripping member 37, so that at the time of cutting. The position of the old roving R1 in the roving guide groove 11 is stabilized, and the cutting is performed more reliably. However, it is necessary to make the distance from the gripping position of the old roving R1 to the outlet of the injection nozzle 14 longer than the fiber length of the roving.

(Fourth Embodiment) Next, a fourth embodiment will be described with reference to FIGS. This embodiment is greatly different from the above-mentioned embodiments in that a regulating member for regulating the end portion of the old roving R1 after cutting, which is continuous with the roving winding when the old roving R1 is cut, is provided.

The structure of the roving yarn splicing head 2 is the same as that of the first embodiment, and the old roving yarn R1 introduced into the roving yarn guiding groove 11 is engaged with the old roving yarn R1 upstream of the cutting position to inject the old roving yarn R1. 14, a restriction rod 40 as a restriction member that is moved and arranged to an action position that is arranged at a position intersecting the injection direction, and a retracted position that cannot engage with the old roving R1;
And a mechanism for driving the. That is,
A support pin 41 is rotatably attached to the head body 10 in a state of protruding above the support pin 20, and a base end of the regulating rod 40 is fixed to an upper end thereof and one end of a lever 42 is integrally rotatable to an intermediate part thereof. Has been done. The restriction rod 40 is bent and formed so as not to engage with the new roving R2. An air cylinder 43 constituting a drive mechanism is supported on the plate 27 so as to extend parallel to the air cylinder 28, and the other end of the lever 42 is rotatably connected to a piston rod 43a thereof via a pin 30. There is.

Next, the operation of the device configured as described above will be described. After the new roving R2 is gripped by the gripping member 21 in the same manner as in the first embodiment, the roving splicing head 2 is placed in the roving splicing operation position with the restriction rod 40 in the retracted position. As a result, FIG. 14, FIG.
As shown in (a), the old roving R1 is introduced into the roving guide groove 11 and is held at a position corresponding to the injection nozzle 14 while being prevented from moving further from the tip of the gripping member 21. It Next, the air cylinder 43 is actuated to move the piston rod 43a to the retracted position, and the restriction rod 40 is rotated clockwise with the lever 42 to be placed in the working position. As a result, as shown in FIGS. 15B and 17B, the restriction rod 40 engages with the old roving R1 on the upstream side of the cutting position, and the old roving R1 intersects the ejection direction of the ejection nozzle 14. Placed in a state.

Next, the compressed gas is jetted from the jet nozzle 14 for a predetermined time to cut the old roving R1. Even after the old roving R1 is cut, the injection of the compressed gas is continued for a short time,
When the regulating rod 40 is located upstream of the cutting position, the old roving R
Since it is in the engagement state with No. 1, the end portion of the old roving R1 after cutting, which is continuous with the roving spool (not shown), is caught by the restriction rod 40 as shown in FIG. 18 (a). After the injection of the compressed gas from the injection nozzle 14 is stopped, the compressed gas is injected from the pipe 23, and the old roving R1 connected to the draft part is moved to the roving guide groove 1.
It comes off from 1 and hangs behind the trumpet 9. Further, the air cylinder 43 operates and the restriction rod 40 returns to the retracted position (state of FIG. 18C). Next, the motor 7 is driven to rotate the roving splicing head 2 so that the end portion of the new roving R2 is trumpeted in the same manner as in the above embodiments.
(Fig. 16 (b) state).

Since the compressed gas is continuously jetted for a short time after the old roving R1 is cut, the old roving R1 connected to the roving winding (not shown) is also jetted with the compressed gas after the cutting. Therefore, when the end portion of the old roving R1 after cutting, which is continuous with the roving winding, is free, the old roving R1 is blown up by the compressed gas and is wound around the roving being spun on the adjacent weight, or the roving guide (Fig. There is a risk that it will wind around (not shown) and interfere with roving replacement work. Further, since the fibers existing at the end of the old roving R1 after cutting are untangled with other fibers and are in a state of being easily detached, the end of the old roving R1 connected to the roving winding is If the compressed gas is injected in the free state, the fibers existing at the ends may scatter and deteriorate the working environment in the factory.

However, in this embodiment, since the end of the old roving R1 after cutting is caught by the regulating rod 40 as described above, the action of the jet air stream for a short time after the old roving R1 is cut. Even when receiving, the fibers are reliably prevented from being separated from the end of the old roving R1 or being blown up by the jet airflow. Therefore, unlike the above-described embodiment, the generation of scattered fly dust is remarkably reduced to prevent the working environment from being deteriorated, and the old roving R1 after cutting hinders the spinning of adjacent weights and the roving replacement work. There is no fear.

The timing of arranging the regulating rod 40 in the working position is not limited to before the start of the injection of the compressed gas from the jet nozzle 14, but before the old roving R1 is completely cut.
It suffices that 0 is placed in the action position, and the restriction rod 40 may be placed in the action position at the same time as the start of injection or slightly after the start of injection.

The present invention is not limited to the above-described embodiments. For example, as shown in FIG. 19, the injection nozzles 34a and 34b of the second embodiment have the same length with straight tips. May be used, or the position of the ejection nozzle may be provided not in the upper portion of the head body 10 but in the middle portion or the lower portion. Further, in the fourth embodiment, the shape of the restriction rod 40 may be a shape that engages with the new roving R2 when it is placed in the working position. In addition, the roving splicing device 1 has a roving splicing head 2
It is also possible to equip a set of two or three or more to carry out the roving joining operation of a plurality of weights at the same time.

[0037]

As described above in detail, according to the present invention, when the succeeding transfer is automatically performed, there is a sufficient length between the cutting of the old roving and the insertion of the new roving into the trumpet. Since the old roving can be reliably cut at the position of, the success rate of roving can be improved even when spinning a thick yarn. Also, since the old roving is cut in a state where the monofilaments constituting the roving are not cut and the monofilaments are undrawn, the end of the old roving after cutting becomes like a brush tip, and the average fiber like cotton card thread is cut. Even in the case of short fibers, the yarn ends due to spinning of the old roving ends in a slab form are eliminated. Further, since the roving yarn is cut by jetting the compressed gas, the cutting time is shortened, and the device is simple and maintenance is not required.

Further, in the invention according to claim 2, since the end portion of the old roving thread after cutting, which is continuous with the roving thread winding, is hooked by the regulating member, in addition to the above effect, the end portion of the old roving thread is compressed to the end portion after cutting. Even if gas is blown, the generation of scattered dust and the blowing up of the old roving yarn end are prevented, and the working environment deteriorates and the old roving yarn after cutting is used as the roving yarn during spinning of the adjacent weight and the roving guide. It is possible to reliably prevent inconvenience caused by winding.

[Brief description of drawings]

FIG. 1 is a side view of a roving yarn joining device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the roving yarn splicing head with the cover removed.

FIG. 3 is a plan view showing a state in which a grip member is arranged at a grip position.

4A is a partial plan view of a roving splicing head, FIG. 4B is a sectional view taken along line BB of FIG. 4A, and FIG. 4C is an enlarged sectional view taken along line AA of FIG.

FIG. 5 is a side view showing a state in which old roving has been introduced into the roving guide groove.

FIG. 6 is a side view showing a cut state of old roving.

FIG. 7 is a side view showing a state in which the old roving after cutting hangs down from the trumpet.

FIG. 8 is a side view showing a state in which a roving yarn splicing head is arranged at a new roving yarn end introducing position.

FIG. 9 is a partial side view of a roving yarn joining device according to a second embodiment.

FIG. 10A is a partial plan view of a roving splicing head,
(B) is the front view.

FIG. 11 is a partial side view of the roving yarn joining device according to the third embodiment.

FIG. 12 is a plan view of the roving splicing head.

FIG. 13 is a partially cutaway perspective view of the head body.

FIG. 14 is a partial side view of a roving yarn joining device according to a fourth embodiment.

FIG. 15 is a partial plan view of the roving splicing head.

16A is a side view showing a state in which an old roving yarn is cut, and FIG. 16B is a side view showing a state in which a roving yarn splicing head is arranged at a new roving yarn end introduction position.

FIG. 17 is a partially omitted front view showing the relationship between the old roving and the restriction rod.

FIG. 18 (a) is a partially omitted front view when the old roving is cut, and FIG. 18 (b) is a partially omitted front view when the old roving after cutting is discharged from the roving guide groove, (C) is a partially omitted front view of the state where the restriction rod is returned to the retracted position.

FIG. 19 is a partial plan view of a roving yarn splicing head of a modified example.

FIG. 20 is a cross-sectional view showing a relationship between a new roving and an old roving in a trumpet when a new roving is inserted in a conventional example.

[Explanation of symbols]

2 ... roving splicing head, 9 ... trumpet, 9a ... exit, 1
0 ... Head body, 11 ... Coarse yarn guide groove as roving yarn guide portion, 14 ... Injection nozzle, 15 ... Recessed portion, 16 ... Plate,
18 ... Pipe, 19 ... Control valve, 21 ... Gripping member, 34
a, 34b ... Injection nozzle, 40 ... Regulating rod as regulating member, R1 ... Old roving, R2 ... New roving.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Tange 2-chome, Toyota-cho, Kariya city, Aichi Prefecture Toyota Industries Corporation

Claims (2)

[Claims] 1. A roving yarn changer in which a roving yarn guide portion is formed at a tip of a roving yarn splicing head, and an injection nozzle for injecting a compressed gas toward an old roving yarn introduced into the roving yarn guide portion is provided. Old roving cutting device. 2. A roving yarn guide portion is formed at the tip of the roving yarn splicing head, and an injection nozzle for injecting compressed gas toward the upstream side of the old roving yarn introduced into the roving yarn guide portion is provided. An operating position in which the old roving introduced into the yarn guide is engaged upstream of the cutting position and the old roving is arranged at a position intersecting the jetting direction of the jet nozzle, and a retractable position where the old roving cannot be engaged. An old roving cutting device of a roving changer provided with a regulating member that is moved and arranged at a position.