JP2995961B2 - Former roving cutting device of roving changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention replaces a roving bobbin (roof winding) suspended on a creel of a spinning machine with a full bobbin (pre-roof winding) suspended on a preliminary roving winding rail. Prior to the replacement operation by the roving yarn changer, the old roving yarn cutting device provided in the roving yarn splicing device for performing the roving yarn splicing (shino splicing) operation. After cutting the thread,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an old roving cutting device of a roving yarn changing machine for performing a roving splicing (so-called chase) method of inserting a new roving into a trumpet.

[0002]

2. Description of the Related Art In a spinning machine, in particular, a ring spinning machine, a roving is drawn from a roving wound on a creel and supplied to a draft part below. When the supply of roving to the draft part progresses and the roving becomes empty or near empty, it is necessary to replace it with a new roving, and at that time, the roving end of the roving to be newly replaced with roving being spun. Needs to be spliced. Conventionally, this roving splicing operation is generally performed manually, but in recent years, automation of the roving splicing operation has been proposed.

As a roving method by a roving splicer, a new roving to be spliced in a roving (shino) guide groove of a roving (shino) splicing head is superimposed on an old roving being spun. At the same time, as the old roving is fed, the overlapping part is guided to the back roller of the draft part, and the overlapping part of the new roving and the old roving is gripped by the back roller, and then the old roving is gripped by the roving holding member. A method for cutting by cutting has been proposed in Japanese Patent Application Laid-Open No. 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 the waiting time until the overlapping portion reaches the gripping position by the back roller via the trumpet is long, and the roving splicing is completed. There is a problem that it takes time. Particularly when spinning fine yarn of high-grade yarn, the spinning speed is slow and the peripheral speed of the back roller is also slow, so that the roving yarn splicing time is long.

As a roving splicing method for solving this problem, a roving (old roving) connected to a trumpet of a draft part from a roving wound during spinning and a preliminary roving wound to be replaced with the roving wound. A roving splicing head capable of gripping a 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 the new roving is gripped, and spinning is performed at that position. The old roving is gripped and cut by the roving splicing head, and then the old roving is released while holding the new roving,
A method of splicing a roving yarn in which a roving splicing head is rotated to insert a new roving yarn into a trumpet is disclosed in Japanese Patent Application Laid-Open No. 2-112426.

[0005]

Problems to be Solved by the Invention
In the roving splicing method disclosed in Japanese Patent Publication No. 6 and the like, since the end of the new roving held by the roving splicing head is positively inserted into the trumpet by the rotation of the roving splicing head, The time required for piecing is reduced. However, the cutting of the old roving in this roving splicing method is performed by rotating the roving splicing head holding 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 other gripping point, the back roller, and the old roving gripping point of the roving splicing head.
Therefore, there is a possibility that the old roving is cut at an extremely short portion where the distance from the back roller to the cutting section is equivalent to the fiber length of the roving supplied to the spinning machine.

If the distance from the back roller to the cutting section is short, the end of the old roving passes through the back roller before the new roving is supplied to the back roller via the trumpet, and the new roving is transferred to the old roving. Roving splicing ends unsuccessfully because it cannot be superimposed on the yarn. When spinning thick yarn, the roving supply speed is high, so it is necessary to insert the new roving at a high speed after cutting the old roving, but the success rate is reduced with considerable difficulty. . In addition, if the cut end of the old roving is short, a favorable condition for inserting a new roving that the old roving runs under the inner wall of the trumpet by its own weight cannot be obtained,
It interferes with the smooth insertion of new roving into the trumpet. Further, when the cut end of the old roving is short, as shown in FIG. 20, when the new roving R2 is inserted into the trumpet 50, the end of the old roving R1 advances into the trumpet 50. In this state, the position of the end of the old roving R1 is not determined, 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.

To reliably cut the old roving at a predetermined position where its end hangs out of a predetermined length from the entrance of the trumpet, it is conceivable to equip the roving splicing head with a cutter. However, when the roving yarn is cut by the cutter, a large number of fibers that are shorter than the distance between the rollers of the draft part are present at the roving end, and the roving yarn in that portion is spun out in a slab shape without being drafted. However, there is a problem that the ballooning is suddenly changed due to a large centrifugal force at the time of winding, and the ballooning changes sharply. Further, there is a problem that it takes time to maintain and replace the cutter in order to prevent a cutting failure due to abrasion.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to remove old roving from the entrance of a trumpet.
Can securely cut at a position of Luo predetermined length, yet rovings can perform cutting while removing the single fiber containing without cutting the single fibers constituting the conservation, exchange of labor is not applied roving exchange machine To provide an old roving cutting device.

[0009]

According to the first aspect of the present invention, a roving yarn guiding portion is formed at the tip of a roving yarn joining head, and the roving yarn guiding portion is introduced into the roving yarn guiding portion. an injection nozzle for injecting compressed gas for countercurrent Ke in the old roving cut the old roving is provided.

Further, in the invention according to the second aspect, a roving yarn guide portion is formed at the tip of the roving yarn splicing head, and the compressed gas flows toward the upstream side of the old roving yarn introduced into the roving yarn guiding portion. An operating position for engaging the old roving introduced into the roving guiding section upstream of the cutting position and guiding the old roving to a position intersecting the injection direction of the injection nozzle. And a restricting member that is moved and arranged between the old roving and a retreat position where it cannot be engaged with the old roving.

[0011]

According to the first aspect of the present invention, the old roving yarn being spun from the draft part is introduced into the roving yarn guide groove formed at the end of the roving splicing head, and in this state, the roving yarn is fed from the injection nozzle. direction Ke in the old roving cut the old roving which has been introduced into the thread guide portion
Compressed gas use is injected. One of the old rovings is gripped by the back roller, so that the movement of the back roller side is restricted, and the single roving is subjected to the action of the jet flow for cutting the old roving, and the monofilament is wound at a predetermined position where the jet flow hits. It is disconnected in a state where it comes off.

According to the second aspect of the present invention, the old roving yarn being spun from the draft part is introduced into the roving yarn guide groove formed at the end of the roving splicing head, and then the old roving yarn is fed from the injection nozzle. A compressed gas is injected toward the yarn. One of the old rovings is gripped by the back roller, and is subjected to the action of the jet airflow in a state where the movement on the back roller side is restricted, and is cut in a state where the single fiber comes off at a predetermined position hit by the jet airflow. . Before the old roving is completely cut, the regulating member is placed in the operating position. As a result, the regulating member engages with the old roving on the upstream side of the cutting position, and the old roving intersects with the ejection direction of the ejection nozzle. Therefore, when cutting the old roving, the regulating member is engaged with the old roving on the upstream side of the cutting position, so that the end of the cut old roving connected to the roving is hooked on the regulating member, and the ejection is performed. The airflow prevents the fibers from being pulled out from the old roving end or from blowing up the old roving end.

[0013]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

The roving splicer 1 is mounted on a roving changer (not shown) which moves along the spinning frame to perform roving change operation. As shown in FIG. 1, the roving splicing head 2 is rotatably supported at the tip of a support arm 3 of the roving splicing device 1.
The support arm 3 positions the roving splicing head 2 at a roving splicing position above the draft part and at a retracting position that does not hinder the movement of the roving yarn changer. Thus, it is fixed at 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 rotating shaft 5 is supported so as to protrude to the side of the mounting portion 3a. At a position corresponding to the inside of the mounting portion 3a of the rotating shaft 5, a toothed pulley 6a is fitted and fixed so as to be integrally rotatable, and a motor 7 fixed to the toothed pulley 6a and the base end of the support arm 3 is provided.
A toothed belt 8 is wound around a toothed pulley 6b fitted to the drive shaft of the motor. The roving splicing head 2 is integrally rotatably fixed to a portion of the rotating shaft 5 protruding to the side of the mounting portion 3a, and the roving splicing head 2 is rotated by driving the motor 7. I have.

A bulging portion 10a having a slope inclined downward toward the rear is provided at the tip of the head body 10 of the roving splicing head 2.
Is formed, and the tip of the bulging portion 10a is formed in a shape that can enter the trumpet 9 (shown in FIG. 8 and the like). A roving guide groove 11 as a roving guide portion is formed at the tip of the head main body 10 so as to extend in the longitudinal direction and the vertical direction of the head main body 10. The bulging portion 10a has a notch 12 on one side of the roving yarn guiding groove 11 and communicating with the roving yarn guiding groove 11 to open the roving yarn guiding groove 11 to the rear and side of the bulging portion 10a. Is formed.

As shown in FIG. 4, the head body 10 has a block 13 having the notch 12 formed separately, and is integrally fixed to the head body 10 by screws (not shown) or the like. In the block 13, as shown in FIG. 4 and the like, a flat concave portion 15 constituting an injection nozzle 14 for injecting a compressed air flow is provided above the notch portion 12 and in front of the notch portion 12 and in the upper and roving guide grooves. The roving guide groove 11 is formed in a state where the side 11 is open. 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 and communicates 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 provided 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 old roving cutting device is constituted by the pipe 18 and the control valve 19.

A support pin 20 is rotatably mounted on the head body 10 behind the bulging portion 10a so as to protrude from the upper and lower sides of the head body 10. Support pin 20
At the lower end, a gripping member 21 for gripping the new roving thread R2 is attached at its base end so as to be integrally rotatable, and at the upper end, a lever 22 is integrally rotatable at one end thereof while extending along the longitudinal direction of the head main body 10. It is fixed to. The tip of the gripping member 21 is inserted into the notch 12,
By the rotation of the support pin 20, the grip 21a is moved to the roving guide groove 1.
A roving yarn gripping position for gripping the new roving yarn R2 in cooperation with one wall surface 11a of the roving yarn guiding groove 11 by intruding into the inside of the roving yarn guiding groove 11;
1a is removably disposed in the roving guide groove 11 and is movably disposed to a standby position where the roving can be moved in the roving guide groove 11. As shown in FIG. 4 (c), a through-hole 21b is formed in the gripping member 21 and extends along the roving guide groove 11, and a pipe 23 having one end connected to a compressed air source at the rear end of the through-hole 21b. Are connected to each other. 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 fixed in the vicinity of the support arm 3 of the rotary shaft 5 so as to be integrally rotatable, and a support plate is provided between the support block 24 and the base upper surface of the head main body 10. 25 is fixed. A support 26 is provided upright at 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. The plate 27 is provided with an air cylinder 28 on the head body 1.
At its base end, it is supported via a support shaft 29 so as to extend in a direction orthogonal to zero. The air cylinder 28 has a piston rod 28 a rotatably connected to the other end of the lever 22 via a pin 30. The gripping member 21 is rotated via the lever 22 by the operation of the air cylinder 28. A cover 31 for covering the lever 22 and the air cylinder 28 is attached to the roving splicing head 2 via an attaching member (not shown) fixed to the support plate 25. The groove 11 extends to near the base end.

The outlet 9a of the trumpet 9 is formed to be vertically long so that the new roving R2 can sufficiently pass while the old roving R1 being spun exists. Next, the operation of the device configured as described above will be described. As shown in FIG. 2, when the piston rod 28a is located at the retracted position as shown in FIG. 2, the grip portion 21a is located at a standby position where the grip portion 21a is retracted from the roving guide groove 11, and as shown in FIG. In the state where 28a is disposed at the protruding position, the grip 21
a is disposed at a roving grasping position where the roving can be grasped in cooperation with one wall surface 11a of the roving guiding groove 11. When gripping the new roving thread R2 drawn from the full bobbin, the gripping member 21 is arranged at the standby position as shown in FIG. 2, and the roving thread can freely enter the depth of the roving thread guiding groove 11. Then, the new roving R2 is introduced to the depth of the roving guide groove 11. New roving yarn R2
The air cylinder 28 is actuated in a state where is introduced to the depth of the roving thread guide groove 11, and the gripping member 21 is rotated together with the lever 22 in the counterclockwise direction in FIG. Then, as shown in FIG. 3, the grip portion 21a is disposed at the roving yarn gripping position where it contacts the other wall surface 11a of the roving yarn guide groove 11, and cooperates with the other wall surface 11a to grip the new roving yarn R2. I do. New roving yarn R2 is roving yarn guiding groove 1.
In the state in which the gripping member 21 is introduced into the back, the gripping portion 21a of the gripping member 21 grips the other wall surface 11a by being pressed by the gripping portion 21a. The tip position of the thread R2 is stabilized.

The new roving yarn R2 is gripped at a position away from the draft part on the front side of the spinning frame. After the gripping of the new roving yarn R2, the support arm 3 is rotated by the drive shaft 4 to rotate the spinning frame. It is tilted toward the machine base, and the roving splicing head 2 is moved and arranged to a roving splicing work position near and above the draft part. Since the cover 31 exists above the head main body 10, the new roving yarn R2 connected to the full bobbin when the roving splicing head 2 moves is reliably prevented from being bent or caught on the lever 22 or the like.

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 guiding groove 11 as shown in FIG. In a state where the gripping member 21 is disposed at the roving yarn gripping position, as shown in FIG. 4A, the old roving R1 is prevented from moving farther from the tip of the gripping member 21 and the old roving R1 is It is held at a position corresponding to the injection nozzle 14. After the roving splicing head 2 is located at the roving splicing operation position, the control valve 19 is opened at the same position, and compressed air is injected from the injection nozzle 14 at a predetermined pressure corresponding to the type of spun yarn. Since the injection port of the injection nozzle 14 is directed upward, the injection air current acts to pull the old roving R1 upward. Then, the old roving R1 is not gripped by the roving splicing head 2, but is subjected to the action of the jet airflow while being gripped by the back roller 32, and a predetermined distance from the jet airflow, that is, a predetermined distance from the injection port of the injection nozzle 14. At a distant position, the single fiber is cut like a brush tip in a state where the single fiber comes off, resulting in the state of FIG.

After cutting the old roving R1, the open / close valve of the pipe 23 is opened and compressed air is injected from the through hole 21b. The cut old roving R1 connected to the draft part is guided by the action of compressed air. While being pushed forward from the groove 11, as shown in FIG. 7, the trumpet 9 hangs down by its own weight. After the injection of the compressed air from the pipes 18 and 23 is stopped, the motor 7 is driven to rotate the roving splicing head 2 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 yarn R2 approaches the trumpet 9, and then rotated at a low speed to be gripped by the roving splicing head 2 as shown in FIG. The end of the roving thread R2 is inserted into the trumpet 9. In a state where the roving splicing head 2 is arranged at the position where the new roving end is introduced into the trumpet 9 shown in FIG. 8, the position where the end of the new roving R2 passes through the outlet 9a of the trumpet 9 and is gripped by the back roller 32. Reach up to. At this time, the rotation speed of the roving splicing head 2 is controlled so as to be substantially equal to or slightly higher than the rotation speed of the back roller 32. When the end 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 passes through the back roller 32 in a state of being superposed on the old roving R1, and the roving is spliced, and thereafter, the spinning is continued by the new roving R2. Since the end of the old roving R1 is cut like a brush without cutting the single fiber,
It passes through the inside of the roller part while being drafted between the front and rear rollers, there is no generation of slab yarn at the cutting portion of the old roving R1, and there is no generation of yarn breakage due to a sudden increase in balloon size.

Since the old roving R1 is always cut at a certain distance from the injection port of the injection nozzle 14, the cut old roving R2 connected to the back roller 32 hangs backward from the trumpet 9, Even in the case of thick count spinning where the roving supply speed is high, the new roving R2 after cutting the old roving can be used.
Of the old roving R1 when the new roving R2 is inserted, even if the insertion into the trumpet 9 is not performed in a very short time.
, And the insertion of the new roving end into the outlet 9a of the trumpet 9 is performed smoothly.

The length from the end of the old roving R1 after cutting to the back roller 32 is such that the old roving R1
Can be adjusted by changing the position of the roving splicing head 2 when injecting compressed air from the injecting nozzle 14 in a state where the roving splicing head 2 is introduced. Further, in this embodiment, since the injection nozzle 14 is formed much wider than the thickness of the roving, even if the old roving R1 slightly moves in the roving guide groove 11, the roving can be reliably cut at a predetermined position. Done.

(Embodiment 2) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the roving splicing head 2
Is different from the apparatus of the above embodiment in that the configuration of the injection nozzle provided in the first embodiment and that the compressed air is not injected from the gripping member 21. That is, an air supply housing 33 to which compressed air is supplied by the pipe 18 is fixed to the upper surface of the head main body 10 behind the base end of the roving guide groove 11.
A pair of injection nozzles 34a, 34b
Is fixed so that the base end thereof communicates with the air supply passage 33a. Both injection nozzles 34a, 3
4b are formed so that their tips are curved toward the roving guide grooves 11 so that the compressed air injected from the tips is injected in the direction in which the force for returning the twist is applied to the old roving R1. In addition, one injection nozzle 34a is formed longer than the other injection nozzle 34b. In the middle of the pipe 18, a control valve 19 similar to the above embodiment is provided.

Therefore, in the apparatus of this embodiment, when compressed air is supplied from the pipe 18 in a state where the old roving R1 is introduced into the roving guide groove 11, the old roving R1 is sent from both the injection nozzles 34a and 34b. On the other hand, the jet airflow acts from a direction orthogonal to the longitudinal direction. Therefore, when the number of the injection nozzles is one, the old roving R1 is
Is difficult to cut, but the old roving R1 is reliably cut because the airflow acting from the two injection nozzles 34a and 34b in the direction of returning the twist of the roving is jetted. Further, since the force of the jet air flow also acts in the direction of detaching the old roving R1 from the roving guide groove 11, unlike the above-described embodiment, the force for ejecting the cut old roving R1 from the roving guide groove 11 is different. No device is required, and the configuration of the device is simplified. In this embodiment, when the roving direction is reversed, the nozzles 34a, 3
The length of 4b is reversed.

(Embodiment 3) 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 it is configured to be able to grip the old roving R1. The bulging portion 10a of the head 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 35 is formed to open rearward and sideward. As shown in FIG. 11 and FIG.
Are formed at positions displaced 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 protruding from the upper and lower sides of the head body 10 in the same manner as the support pin 20, and an old roving grasping member 37 is integrally rotated at its lower end at its lower end. The lever 38 is fixed to the upper end so as to be integrally rotatable. The old roving grasping member 37 has the notch 35
A roving yarn gripping position which is inserted into the rotatable pin and rotates the support pin 36 so that the gripping portion enters the roving yarn guiding groove 11 and cooperates with the wall surface of the roving yarn guiding groove 11 to grip the old roving R1; The grip portion is movably disposed to retreat from the roving guide groove 11 and move to a standby position where the roving is allowed to move in the roving guide groove 11. Then, the air cylinder 2 is placed on the plate 27.
A piston rod 39 a of an air cylinder 39 supported so as to extend in parallel with 8 is rotatably connected to the other end of the lever 38 via a pin 30. A regulating member 21c for regulating the old roving R1 from entering the roving guide groove 11 is fixed to the tip of the gripping member 21. The regulating member 21c is formed of a wire and
When the gripping member 21 is located at the new roving holding position, the gripping member 21 is disposed at a position intersecting with the roving yarn guiding groove 11, and the old roving R1 is located at the back of the roving yarn guiding groove 11. It is designed to regulate the intrusion into.

In the apparatus of this embodiment, compressed air is injected from the injection nozzle 14 in a state where the old roving R1 introduced into the roving guide groove 11 is gripped by the old roving holding member 37, so The position of the old roving R1 in the roving guide groove 11 is stabilized, and the cutting is performed more reliably. However, the distance from the gripping position of the old roving R1 to the outlet of the injection nozzle 14 needs to be longer than the fiber length of the roving.

(Embodiment 4) Next, a fourth embodiment will be described with reference to FIGS. This embodiment is significantly different from the previous embodiments in that a regulating member for regulating the end of the cut old roving R1 connected to the roving winding at the time of cutting the old roving R1 is provided.

The construction of the roving splicing head 2 is the same as that of the first embodiment, except that the old roving R1 introduced into the roving guiding groove 11 is engaged upstream of the cutting position of the old roving R1 to eject the old roving R1. 14, a regulating rod 40 as a regulating member that is moved and arranged to a retreat position where it cannot be engaged with the old roving thread R <b> 1, and a regulating rod 40.
And a mechanism for driving the motor. That is,
A support pin 41 is rotatably attached to the head main body 10 in a state of protruding above the support pin 20, and a base end of a regulating rod 40 is fixed to an upper end thereof, and one end of a lever 42 is fixed to an intermediate portion so as to be integrally rotatable. Have been. The regulating rod 40 is bent so as not to engage with the new roving R2. An air cylinder 43 constituting a driving mechanism is supported on the plate 27 so as to extend in parallel with the air cylinder 28, and the other end of the lever 42 is rotatably connected to a piston rod 43a via a pin 30. I have.

Next, the operation of the above-configured apparatus 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 disposed at the roving splicing operation position with the regulating rod 40 disposed at the retracted position. As a result, FIGS. 14, 15 (a) and 17
As shown in (a), the old roving thread R1 is introduced into the roving thread guiding groove 11 and is held at a position corresponding to the injection nozzle 14 in a state where the old roving thread R1 is prevented from moving deeper than the tip of the gripping member 21. You. Next, the air cylinder 43 is operated to move the piston rod 43a to the retracted position, and the regulating rod 40 is rotated clockwise together with the lever 42 to be disposed at the operating position. As a result, the regulating rod 40 engages with the old roving R1 on the upstream side of the cutting position as shown in FIGS. 15B and 17B, and the old roving R1 intersects with the ejection direction of the ejection nozzle 14. Placed in a state.

Next, the compressed gas is injected from the injection nozzle 14 for a predetermined time to cut the old roving R1. The injection of the compressed gas is continued for a short time after the old roving R1 is cut,
When the regulating rod 40 is moved upstream from the cutting position, the old roving R
As shown in FIG. 18A, the end of the old roving R1 after cutting, which is continuous with the roving winding (not shown), is hooked on the regulating rod 40. 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.
1 and hangs backward from the trumpet 9. Further, the air cylinder 43 operates to return the regulating rod 40 to the retracted position (the state shown in FIG. 18C). Next, the motor 7 is driven to rotate the roving splicing head 2 so that the end of the new roving yarn R2
(The state of FIG. 16B).

Since the injection of the compressed gas is continued for a short time even after the old roving R1 is cut, the old roving R1 connected to the roving winding (not shown) receives the injection of the compressed gas even after the cutting. Therefore, in a state where the end of the old roving R1 after cutting connected to the roving winding is free, the old roving R1 is blown up by the compressed gas and wound around the roving yarn being spun by the adjacent weight, or a roving guide (see FIG. (Not shown), which may hinder the roving operation. Further, 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 separated, so that the end of the old roving R1 connected to the roving winding is If the compressed gas is injected in a free state, the fibers present at the ends may be scattered and the working environment in the factory may be deteriorated.

However, in this embodiment, since the end of the old roving R1 after cutting is hooked on the regulating rod 40 as described above, the action of the short-time jet airflow after the cutting of the old roving R1 is performed. Even when receiving, the fibers are surely prevented from separating from the end of the old roving R1 or being blown up by the jet airflow. Therefore, unlike the above-described embodiment, the occurrence of flying fly cotton is significantly reduced to prevent the work environment from deteriorating, and the old roving R1 after cutting interferes with the spinning of the adjacent weight and the roving replacement work. There is no fear.

The timing at which the regulating rod 40 is placed in the operating position is not limited to before the start of the injection of the compressed gas from the injection nozzle 14, but is regulated before the old roving R1 is completely cut.
0 may be arranged at the operation position, and the regulating rod 40 may be arranged at the operation position at the same time as the injection start or slightly after the injection start.

The present invention is not limited to the above embodiments. For example, as shown in FIG. 19, in the second embodiment, the injection nozzles 34a and 34b have the same length with the tips extending straight. Or the position of the ejection nozzle may be provided in the middle or lower part of the head main body 10 instead of the upper part. Further, in the fourth embodiment, the shape of the regulating rod 40 may be such that it engages with the new roving R2 when the regulating rod 40 is arranged at the operation position. Also, the roving splicing head 1
May be equipped in pairs or three or more to simultaneously perform the roving operation of a plurality of weights.

[0037]

As described above in detail, according to the present invention, when the handover is automatically performed, the predetermined length has a sufficient margin from the cutting of the old roving to the insertion of the new roving into the trumpet. Since the old roving can be reliably cut at the position, the roving splicing success rate is improved even when spinning thick yarn. In addition, since the old roving is cut in a state where the single fiber is drawn without cutting the single fiber constituting the roving, the old roving end after the cutting becomes a brush point, and the average fiber is cut like a cotton card yarn. Even in the case of short fibers, the old roving ends become slab-shaped and no yarn breakage occurs. Furthermore, since the roving is cut by injecting the compressed gas, the cutting time is shortened, and further, there are provided excellent effects such as a simple apparatus and no need for maintenance.

According to the second aspect of the present invention, the end of the old roving after cutting connected to the roving winding is hooked on the regulating member. Even if the gas is blown, the generation of flying cotton and the end of the old roving are prevented, and the working environment is deteriorated and the old roving after cutting is transferred to the roving and roving guide during the spinning of the adjacent weight. Inconvenience caused by winding can be reliably prevented.

[Brief description of the drawings]

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

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

FIG. 3 is a plan view showing a state where a gripping member is arranged at a gripping position.

4A is a partial plan view of the 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 is introduced into the roving guide groove.

FIG. 6 is a side view showing a cutting 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 the roving splicing head is arranged at a new roving end introduction position.

FIG. 9 is a partial side view of a roving splicing device of a second embodiment.

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

FIG. 11 is a partial side view of the roving splicing device of 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 the roving splicing device of the fourth embodiment.

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

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

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

18A is a partially omitted front view when the old roving is cut, and FIG. 18B 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 regulating rod has returned to the retracted position.

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

FIG. 20 is a cross-sectional view showing the 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 ... roving guide groove as roving guide, 14 ... injection nozzle, 15 ... recess, 16 ... plate,
18 ... pipe, 19 ... control valve, 21 ... gripping member, 34
a, 34b: injection nozzle, 40: regulating rod as a regulating member, R1: old roving, R2: new roving.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Tange 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (56) References JP-A-62-56272 (JP, A) 2-112426 (JP, A) JP-A-62-57957 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D01H 15/00 D01H 9/16

Claims (2)

(57) [Claims] 1. A to the tip of SoitoTsugi head to form a roving guide portion, said old roving which has been introduced into roving guide portion toward Ke old roving
An old roving yarn cutting device of a roving yarn changer equipped with an injection nozzle for injecting compressed gas for cutting. 2. A roving yarn guide portion is formed at the tip of a roving yarn splicing head, and an injection nozzle for injecting compressed gas toward an upstream side of the old roving yarn introduced into the roving yarn guiding portion is provided. A functioning position for engaging the old roving introduced into the yarn guide portion upstream of the cutting position and disposing the old roving at a position intersecting with the jetting direction of the injection nozzle, and a retreat that cannot be engaged with the old roving. An old roving cutting device of a roving yarn changer provided with a regulating member which is moved and arranged at a position.