CN116971045A

CN116971045A - Spinning tractor

Info

Publication number: CN116971045A
Application number: CN202310467970.1A
Authority: CN
Inventors: 杉山研志; 岩木孝之; 七山大督; 桥本欣三
Original assignee: TMT Machinery Inc
Current assignee: TMT Machinery Inc
Priority date: 2022-04-28
Filing date: 2023-04-27
Publication date: 2023-10-31
Also published as: EP4269303A1; JP2023163590A

Abstract

The invention provides a spinning tractor, which can reliably cut threads through a thread cutting and sucking device. The spinning tractor comprises: a yarn cutting and sucking device (30) is provided with: a cutter (32) capable of cutting the advancing threads along the arrangement direction of the threads; and a suction device (35) capable of sucking the thread cut by the cutter (32); a godet roller disposed downstream of the yarn cutting and sucking device (30) in the yarn advancing direction and conveying the advancing yarns along the yarn advancing direction; and a control device capable of controlling the godet to stop when the yarn (Y) is cut and sucked by the yarn cutting and sucking device (30). By bringing the plurality of threads (Y) close to the cutter (32) and the suction device (35), the plurality of threads (Y) can be sequentially cut and sucked. The control device stops the godet based on the situation that at least a plurality of threads (Y) are in a cutting state.

Description

Spinning tractor

Technical Field

The present invention relates to a spinning tractor provided with a yarn cutting and sucking device.

Background

Conventionally, a spinning tractor is known in which a spun yarn is fed out through a godet and wound up by a winding unit. In such a spinning machine, since the yarn is continuously spun even if the winding of the yarn by the winding portion is interrupted, the yarn that is continuously spun needs to be cut and sucked by the yarn cutting and sucking device.

For example, patent document 1 discloses a wire cutting suction device including: a cutter that moves in the direction of arrangement of the plurality of wires and cuts the advancing wire; and a suction device connected to the suction source for sucking the thread cut by the cutter. In the yarn cutting and sucking device disclosed in patent document 1, the suction source and the sucking device are disconnected during winding of the yarn (for example, see paragraph [0031] of patent document 1).

Patent document 1: japanese patent application laid-open No. 2012-180610

Disclosure of Invention

As in patent document 1, in a wire cutting and sucking device, when winding of a wire is interrupted, a suction source is connected to the suction device, and the wire cut by a cutter is sucked. However, if the winding of the wire is interrupted, the tension of the wire is lowered, and it may be difficult to cut the advancing wire. In addition, in the case where the advancing yarn is thick, it may be difficult to cut the advancing yarn.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a spinning tractor capable of reliably cutting a yarn by a yarn cutting and sucking device.

(1) The spinning tractor of the invention is characterized in that the spinning tractor comprises:

A yarn cutting suction device is provided with: a cutter configured to cut the advancing plurality of threads along an arrangement direction in which the plurality of threads are arranged; and a suction device capable of sucking the thread cut by the cutter;

a roller disposed downstream of the yarn cutting and sucking device in a yarn advancing direction and configured to convey the plurality of advancing yarns along the yarn advancing direction; and

a control device capable of controlling the roller to stop when the thread is cut and sucked by the thread cutting and sucking device,

by bringing the plurality of wires close to the cutter and the suction device, the plurality of wires can be sequentially cut and sucked,

the control device performs such control as: the rotation of the roller is not decelerated even if one of the plurality of wires is in a cut state, and the roller is stopped based on the fact that at least the plurality of wires is in the cut state.

According to the spinning tractor described in the above (1), the rotation of the roller is not decelerated only when one of the plurality of filaments is in the cut state, and the control of stopping the roller is not performed until at least the plurality of filaments are in the cut state. Therefore, the tension of the uncut yarn can be suppressed from decreasing until the plurality of yarns are cut. Therefore, the yarn traveling in the yarn traveling direction can be reliably cut. The term "without decelerating the rotation of the roller" includes at least the case where the rotation of the roller is maintained so that the tension of the yarn on the downstream side in the yarn traveling direction of the yarn cutting and sucking device is not lowered, and the case where the rotation of the roller is accelerated.

(2) In the spinning tractor of the invention, characterized in that,

the cutter and the suction device move so as to approach the plurality of wires while the plurality of wires travel in the wire traveling direction.

According to the spinning tractor of the above (2), the filaments can be reliably cut by making the cutter and the suction device approach the stably running filaments, and the cut filaments can be prevented from being entangled.

(3) In the spinning tractor of the invention, characterized in that,

the cutter and the suction device do not move, and the plurality of wires are moved so as to approach the cutter and the suction device.

According to the spinning tractor described in the above (3), since the yarn can be cut in a state where the cutter and the suction device are fixed, the yarn can be cut in a stable state without being affected by vibration or the like caused by movement of the cutter and the suction device.

(4) In the spinning tractor of the invention, characterized in that,

both of the plurality of wires and the cutter and the suction device move so as to approach the plurality of wires to the cutter and the suction device.

The spinning machine according to the above (4), wherein the plurality of filaments are moved together with both the cutter and the suction device so as to approach the cutter and the suction device. In this way, the movement amount of the plurality of wires and the movement amount of the cutter and the suction device can be suppressed, and further, the enlargement of the device can be suppressed, and all of the plurality of wires Y can be sequentially cut and sucked one by one.

(5) In the spinning tractor of the invention, characterized in that,

the spinning drawing mechanism is configured so that the intervals between the plurality of threads along the arrangement direction are not changed before and after the plurality of threads approach the cutter and the suction device.

According to the spinning tractor described in the above (5), since the intervals between the plurality of filaments do not change before and after the plurality of filaments approach the cutter and the suction device, all of the plurality of filaments Y aligned in the alignment direction can be reliably cut and sucked one by one in sequence.

(6) In the spinning tractor of the invention, characterized in that,

when d is the distance between the 1 st thread of the plurality of threads and the 2 nd thread adjacent to the 1 st thread in the arrangement direction and v is the relative speed of the cutter and the suction device with respect to the plurality of threads,

The thread cutting and sucking device moves at least one of the cutter and the sucking device so that v is equal to or less than 5d and the plurality of threads are brought close to the cutter and the sucking device when the plurality of threads are sequentially cut and sucked.

According to the spinning tractor described in the above (6), since the plurality of filaments are brought close to the cutter and the suction device in the relationship of v.ltoreq.5d, the filaments traveling in the filament traveling direction can be cut one by one in turn. Therefore, the advancing yarn can be reliably cut one by one, and the cutter can be prevented from generating a curl in a short time.

(7) In the spinning tractor of the invention, characterized in that,

the control device performs such control as: the rotation of the roller is not decelerated until all of the plurality of wires aligned in the alignment direction are in a cut state, and the roller is stopped based on the fact that all of the plurality of wires are in the cut state.

According to the spinning tractor described in the above (7), all of the plurality of filaments traveling in the filament traveling direction can be reliably cut while the decrease in the tension of the filaments is suppressed.

The spinning tractor described in (1) to (7) above includes not only a state in which the yarn is actually cut but also a state in which the yarn is regarded as being cut.

The spinning machine of the present invention is not necessarily required to have all the configurations described in (1) to (7) above. For example, in the invention of the spinning tractor according to (1), the configurations according to (2) to (7) are not all essential. The spinning machine of the present invention may be any combination of the configuration described in (1) and the configurations described in any one of (2) to (7) insofar as the integration can be achieved.

The invention has the advantages that: according to the present invention, a spinning tractor capable of reliably cutting a yarn by a yarn cutting suction device can be provided.

Drawings

Fig. 1 is a schematic configuration showing an example of a spinning machine according to the present embodiment.

Fig. 2 is a schematic view showing an example of the thread limiting thread guide and the thread cutting and sucking device according to the present embodiment.

Fig. 3 is an example of a block diagram showing an outline of an electrical configuration of the spinning machine according to the present embodiment.

Fig. 4 is a flowchart showing an example of the operation stop time processing in the present embodiment.

Fig. 5 is a diagram illustrating an operation of cutting and sucking a plurality of wires by the wire cutting and sucking device in the present embodiment, (a) is an example of a diagram showing only the wire on the side closest to the wire to be cut and sucked, and (B) is an example of a diagram showing only the wire on the side closest to the wire to be sucked and the wire adjacent to the wire on the other side.

Fig. 6 is a schematic view showing an example of a thread limiting thread guide and a thread cutting and sucking device according to modification 1.

Fig. 7 is a schematic view showing an example of a thread limiting thread guide and a thread cutting and sucking device according to modification 2.

Description of the reference numerals

1: a spinning tractor; 32: a cutter; 30: a thread cutting suction device; 4a: a 1 st godet; 4b: a 2 nd godet roll; 50: a control device; y: a silk thread.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For convenience of explanation, the directions of the up-down direction, the left-right direction, and the front-rear direction are shown in the drawings described below.

[1. Outline of spinning tractor ]

First, an outline of a spinning machine 1 according to an embodiment of the present invention (hereinafter referred to as "present embodiment") will be described with reference to fig. 1. Fig. 1 is a schematic configuration showing an example of a spinning machine 1 according to the present embodiment.

The spinning machine 1 mainly includes, for example, a spinning device 2, an oil supply guide 3, a yarn limiting yarn guide 20, a yarn cutting and sucking device 30, two godets (1 st godet 4a and 2 nd godet 4 b) for stretching a yarn Y, a yarn winding device 10 for winding the stretched yarn Y, and a control device 50 (see fig. 3 described later).

The spinning device 2 has a plurality of spinnerets 2a, and a high-temperature liquid molten polymer (yarn material) is continuously extruded from each of the spinnerets 2 a. The yarn material extruded from each spinneret 2a was cooled and solidified, and spun as 1 yarn Y composed of a plurality of filaments F. Thus, a plurality of filaments Y are spun from the plurality of spinnerets 2 a. The filaments F are made of a molten fiber material such as polyester.

The oil supply guide 3 is disposed below the spinning device 2, and applies an oiling agent to the plurality of filaments Y spun from the spinneret 2a of the spinning device 2. The oil supply guide 3 defines the interval between adjacent yarns Y in the lateral direction (the arrangement direction of the present invention) to be a fixed amount.

The thread restricting thread guide 20 is disposed below the oil supply guide 3 and above the 1 st godet 4 a.

The yarn cutting and sucking device 30 is a device for cutting and sucking the plurality of yarns Y spun from the spinneret 2a of the spinning device 2, and is disposed downstream of the oil supply guide 3 in the yarn traveling direction. Since the plurality of filaments Y are continuously spun from the spinneret 2a of the spinning device 2 even if the process is interrupted, the filament cutting and sucking device 30 cuts and sucks the plurality of filaments Y continuously spun during the process interruption on the downstream side of the filament cutting and sucking device 30. Details of the thread cutting suction device 30 will be described later.

The two godets 4a and 4b pull the yarn Y to which the oiling agent is applied by the oiling guide 3, and convey the yarn Y to the yarn winding device 10 disposed below. The 2 nd godet 4b is disposed downstream of the 1 st godet 4a in the yarn traveling direction and at an upper rear portion of the 1 st godet 4 a. The 1 st godet 4a and the 2 nd godet 4b are driven by a 1 st drive motor 5a and a 2 nd drive motor 5b, respectively (see fig. 3 described later). The number of godets is not limited to two.

The yarn winding device 10 is a device for winding a plurality of yarns Y fed from two godet rolls 4a and 4b, and mainly includes, for example, a swing fulcrum yarn guide 11, a traverse yarn guide 12, a winding shaft 13, a turntable 14, a main body frame 15, and a contact roller 16.

The swing fulcrum guides 11 have a plurality of swing fulcrum guides 11 corresponding to the plurality of wires Y, respectively, and distribute the plurality of wires Y fed from the 2 nd godet 4b, respectively. The traverse guide 12 has a plurality of traverse guides 12 corresponding to the plurality of wires, and traverses the wires Y distributed by the plurality of swing fulcrum guides 11. The reeling shafts 13 have, for example, two reeling shafts 13 which are axially identical. A plurality of bobbins B are mounted in series along the axis of the winding shaft 13. The turntable 14 has a rotatable disk shape and supports one end of each of the two winding shafts 13. The main body frame 15 rotatably supports the turntable 14. The contact roller 16 is movable in the up-down direction relative to the main body frame 15, and can be brought into contact with or separated from the bobbin B attached to the winding shaft 13.

[2 ] Silk thread cutting suction device ]

Fig. 2 is a schematic view showing an example of the thread limiting thread guide 20 and the thread cutting and sucking device 30 according to the present embodiment.

As shown in fig. 2, the yarn cutting and suctioning device 30 is disposed on the immediately upstream side of the yarn guide 20 in the yarn advancing direction, and is disposed on the left side of the yarn path of the plurality of yarns Y advancing in the left-right direction. The number of the plurality of threads Y is 12, for example, but the number of threads Y is not limited thereto. In fig. 2, the plurality of wires Y should be denoted by reference numerals throughout the plurality of wires Y, but for convenience, only 3 wires Y are denoted by reference numerals (the same applies to fig. 5 to 7 described later).

The thread limiting thread guide 20 has a comb-like shape having a plurality of grooves 20a arranged in the left-right direction corresponding to the plurality of threads Y. The plurality of wires Y pass through the plurality of grooves 20a, respectively. The thread limiting thread guide 20 defines the intervals in the lateral direction of the plurality of threads Y wound around the godets 4a and 4b as fixed amounts by the intervals in the lateral direction of the plurality of grooves 20a. In fig. 2, the plurality of grooves 20a should be denoted by the reference numerals for all of the plurality of grooves 20a, but for convenience, only 3 grooves 20a are denoted by the reference numerals (the same applies to fig. 5 to 7 described later).

The yarn cutting and suctioning device 30 mainly includes, for example: a holder 31 as a base; a cutter 32 for cutting the yarn Y; a suction device 35 for sucking the yarn Y cut by the cutter 32; and an air cylinder 37 capable of moving the cutter 32 in the direction in which the wires Y are aligned (left-right direction in fig. 2).

The cutter 32 has: a blade 33 capable of cutting the plurality of threads Y one by one or together; and a blade holding member 34 for holding the blade 33.

The suction device 35 sucks the plurality of wires Y cut by the blade 33 of the cutter 32. The suction device 35 includes a suction source (not shown) and a tube member 36 connected to the suction source via a solenoid valve 42 (see fig. 3 described later). A blade holding member 34 is attached to the lower surface of the tubular member 36. In a state where the blade holding member 34 is attached to the lower surface of the tubular member 36, the blade 33 is located in the vicinity of the suction port 36a at the right front end portion of the tubular member 36. Suction force for sucking the cut yarn Y is generated at the suction port 36 a. The yarn Y cut by the cutter 32 is sucked from the suction port 36 a.

The air cylinder 37 moves the cutter 32 and the suction device 35 (more specifically, the tube member 36) with respect to the plurality of wires Y. The cylinder 37 has a piston rod 37a and is disposed in the holder 31 serving as a base. The piston rod 37a is connected to the cylinder member 36 via the cutter 32 (more specifically, the blade holding member 34). When the cylinder 37 is driven, the piston rod 37a expands and contracts in the left-right direction, and the cutter 32 and the suction device 35 advance and retreat in the left-right direction. In addition, even if the piston rod 37a expands and contracts, the holder 31 does not move.

The piston rod 37a shown in fig. 2 is in a contracted state. When the piston rod 37a is in the contracted state, the cutter 32 is located at a retracted position where any one of the wires Y cannot be cut. When the piston rod 37a moves from the contracted state toward the expanded state (rightward in fig. 2), the cutter 32 and the tube member 36 enter rightward (i.e., in a direction approaching the plurality of wires Y), and the wires Y can be cut by the blade 33. In the present embodiment, the left side in the left-right direction corresponds to one side in the arrangement direction of the present invention, and the right side in the left-right direction corresponds to the other side in the arrangement direction of the present invention.

In the present embodiment, the cutter 32 and the suction device 35 are configured to move the piston rod 37a in the arrangement direction by operating the piston rod, but the present invention is not limited thereto, and the cutter 32 and the suction device 35 may be configured to move by rotating gears engaged with the motor.

[3. Control device ]

Fig. 3 is an example of a block diagram showing an outline of an electrical configuration of the spinning machine 1 according to the present embodiment.

As shown in fig. 3, the control device 50 can receive at least an operation stop signal and an operation start signal, which are generated, for example, based on an operation by an operator. In addition, when the cutting of the yarn Y is detected, that is, when a yarn cutting signal is received, an operation stop signal is also generated.

The control device 50 is electrically connected to at least the 1 st electromagnetic valve 42, the 2 nd electromagnetic valve 38, the 1 st drive motor 5a, the 2 nd drive motor 5b, and the wire winding device drive source 17.

The 1 st electromagnetic valve 42 switches the connection state between the suction source (not shown) and the tube member 36 (see fig. 2). For example, during the operation of the spinning machine 1, the suction source 40 is disconnected from the tube member 36, and suction force for sucking the cut yarn Y is not generated at the suction port 36 a. When the control device 50 receives the operation stop signal, the 1 st solenoid valve 42 is operated to connect the suction source 40 to the tube member 36, and suction force for sucking the cut yarn Y is generated at the suction port 36 a.

The 2 nd electromagnetic valve 38 is connected to the cylinder 37, and cuts off the expansion and contraction state of the piston rod 37a (see fig. 2). For example, when the 2 nd solenoid valve 38 is operated to the 1 st position, compressed air is supplied to the cylinder 37 to move the piston rod 37a in the extension direction. When the 2 nd electromagnetic valve 38 is operated to the 2 nd position, compressed air is supplied to the cylinder 37 to move the piston rod 37a in the contraction direction. When the 2 nd solenoid valve 38 is located at the neutral position, the piston rod 37a is held at that position. During operation of the spinning tractor 1, the piston rod 37a is kept in a contracted state.

The 1 st drive motor 5a is a drive source for rotating the 1 st godet 4 a. The 2 nd drive motor 5b is a drive source for rotating the 2 nd godet roller 4 b.

The drive source 17 for the wire winding device is a drive source for driving the wire winding device 10. The drive source 17 for the wire winding device is, for example, a motor (not shown) for rotating the turntable 14, a motor (not shown) for rotating the two winding shafts 13, or the like.

[4. Treatment at stop of operation ]

Next, the operation of the yarn cutting and sucking device 30 in the operation stop time process and the operation stop time process executed by the control device 50 when the operation of the spinning tractor 1 (see fig. 1) is stopped will be described with reference to fig. 4 and 5.

Fig. 4 is a flowchart showing an example of the operation stop time process among the various processes executed by the control device 50 in the present embodiment. The flowchart shown in fig. 4 is a flowchart for convenience in explaining the present embodiment. Fig. 5 is a diagram illustrating an operation of cutting and sucking the plurality of wires Y by the wire cutting and sucking device 30 in the present embodiment, (a) is an example of a diagram of cutting and sucking only the wire Y1 on the nearest side in the arrangement direction among the plurality of wires Y1 to Y12, and (B) is a diagram of cutting and sucking only the wire Y1 among the plurality of wires Y1 to Y12 and the wire Y2 adjacent to the wire Y1 on the other side in the arrangement direction.

During operation of the spinning machine 1 (see fig. 1), the cutter 32 and the tube member 36 are located at the retracted position (the position shown in fig. 2). At this time, the suction source (not shown) is disconnected from the tube member 36, and suction force from the suction port 36a is not generated. Further, the piston rod 37a is in a contracted state. It is needless to say that, in the operation of the spinning machine 1, the 1 st drive motor 5a, the 2 nd drive motor 5b, and a motor (not shown) for rotating at least 1 of the two winding shafts 13 are rotated.

As shown in fig. 4, when receiving the operation stop signal (in the case of yes determination in S1 shown in fig. 4), control device 50 shifts the process to S2. On the other hand, if the operation stop signal is not received (in the case of no determination at S1 shown in fig. 4), the processing at S1 to S7 shown in fig. 4 is not executed.

In S2, the control device 50 controls the suction source (not shown) to be connected to the tube member 36. Specifically, the control device 50 operates the 1 st electromagnetic valve 42 to connect the suction source to the tubular member 36. When the suction source is connected to the tube member 36, the wire Y can be sucked from the suction port 36a in the direction of the arrow shown in fig. 5 (a). The control device 50 executes the process of S3 after the process of S2.

In S3, the control device 50 controls the cutter 32 and the suction device 35 to start moving toward the plurality of threads Y, that is, from one side toward the other side in the arrangement direction. Specifically, the control device 50 operates the 2 nd solenoid valve 38 to the 1 st position. When the 2 nd solenoid valve 38 is operated to the 1 st position, compressed air is supplied to the cylinder 37 to move the piston rod 37a in the extension direction (rightward in fig. 5). When the piston rod 37a is operated in the extension direction, both the cutter 32 and the suction device 35 move from one side in the arrangement direction to the other side (right direction in fig. 5). That is, the thread limiting guide 20 does not move, and the thread cutting and suctioning device 30 moves so that the plurality of threads Y approach the thread cutting and suctioning device 30.

However, when the wire Y has a large wire diameter, the blade 33 may be difficult to cut the plurality of wires Y at once. Further, when the blade 33 cuts the plurality of wires Y at once, excessive shearing force generated by the wires Y traveling in the wire traveling direction (downward direction in fig. 5) acts on the blade 33, and there is a possibility that sharpening may occur.

Therefore, in the present embodiment, the cutter 32 and the suction device 35 are moved from one side in the arrangement direction toward the other side (right direction in fig. 5) at a low speed so that the plurality of wires Y traveling in the wire traveling direction can be cut one by one in sequence. The moving speed of the cutter 32 and the suction device 35 from one side to the other side in the arrangement direction is, for example, about one third of that of 57 mm/sec in the past, and about 20 mm/sec in the present embodiment. The moving speed of the cutter 32 and the suction device 35 from one side to the other side in the arrangement direction can be reduced by, for example, slowing down the operating speed of the piston rod 37a that is operated in the extension direction.

As shown in fig. 5 (a), the distance between the wire Y1 on the nearest side in the arrangement direction among the 12 wires Y1 to Y12 arranged in the arrangement direction and the wire Y2 adjacent to the wire Y1 on the other side in the arrangement direction is d. The time from the cutting state of the yarn Y1 to the cutting state of the yarn Y2 is set to t, and the moving speed of the cutter 32 and the suction device 35, which move from one side to the other side in the arrangement direction, is set to v. At this time, the cutter 32 and the suction device 35 move from one side to the other side in the arrangement direction at a moving speed at which the relationship "v.ltoreq.d/t" is established. Thus, after the yarn Y1 is reliably cut and sucked as shown in fig. 5 (a), the yarn Y2 is cut and sucked as shown in fig. 5 (B). In the present embodiment, the distance d is 4mm. Further, as described above, the moving speed v of the cutter 32 and the suction device 35 is 20 mm/sec. Since the proportional relationship between the interval d and the moving speeds v of the cutter 32 and the suction device 35 is established, the time t is approximately 5 seconds. That is, it is preferable that the cutter 32 and the suction device 35 are moved from one side to the other side in the arrangement direction at a movement speed at which the relationship "v.ltoreq.5d" is established.

However, according to the experimental results of the present inventors, when the moving speed v of the cutter 32 and the suction device 35 is 20 mm/sec and the distance d between the yarn Y1 and the yarn Y2 is 4mm, the yarn Y can be cut one by one with a probability of 100% regardless of the yarn diameter, that is, even for a thick variety of yarn types. In addition, in the experimental result performed by setting the moving speed v of the cutter 32 and the suction device 35 to 20 mm/sec and the distance d between the yarn Y1 and the yarn Y2 to 6mm, the yarn Y can be cut one by one with a probability of 100% regardless of the yarn diameter. However, when the moving speed v of the cutter 32 and the suction device 35 is 57 mm/sec as in the conventional case, the yarn Y can be cut with a probability of approximately 20% regardless of whether the distance d between the yarn Y1 and the yarn Y2 is 4mm or 6 mm.

After executing the processing of S3, the control device 50 proceeds to the processing of S4. However, in the case of cutting the yarn Y traveling in the yarn traveling direction by the cutter 32, if the tension of the yarn Y traveling in the yarn traveling direction is reduced, the yarn Y may not be cut satisfactorily. If the yarn Y traveling in the yarn traveling direction cannot be cut well, the yarn Y may not be sucked well from the suction port 36a, and the cut yarn Y may be wound around under the cutter 32.

Therefore, the control device 50 stops the 1 st drive motor 5a and the 2 nd drive motor 5b (S5) after determining that all of the plurality of wires Y are in the cut state (S4) rather than immediately stopping the winding shaft 13 in rotation based on the reception of the operation stop signal. That is, when the number of the plurality of wires Y is 12, for example, after all of Y1 to Y12 of the 12 wires Y are in the cut state, the rotation of the 1 st godet 4a and the 2 nd godet 4b is stopped. Accordingly, the rotation of the 1 st godet 4a and the 2 nd godet 4b is continued as long as all Y1 to Y12 of the 12 yarns Y are not discriminated to be in the cut state (as long as the determination is not yes in S4). In this way, all Y1 to Y12 of the plurality of wires Y traveling in the wire traveling direction can be reliably cut while suppressing a decrease in tension.

The "all Y1 to Y12 of the plurality of wires Y are in the cut state" includes not only a state in which all Y1 to Y12 of the plurality of wires Y are actually cut but also a state in which all Y1 to Y12 of the plurality of wires Y are regarded as being cut. For example, a plurality of sensors for detecting the plurality of wires Y are provided on the downstream side of the wire limiting guide 20, and when the wires Y are not detected by all of the plurality of sensors, it can be determined that all of Y1 to Y12 of the plurality of wires Y are in a cut state.

When the blade 33 or the suction port 36a reaches the position where all Y1 to Y12 of the plurality of wires Y are cut, it is considered that all Y1 to Y12 of the plurality of wires Y are cut, although it is not directly detected that all Y1 to Y12 of the plurality of wires Y are cut. Similarly, if all of the plurality of wires Y1 to Y12 are cut when the piston rod 37a moves to the operation limit in the extension direction, it can be said that the state in which the piston rod 37a moves to the operation limit in the extension direction is regarded as the state in which all of the plurality of wires Y1 to Y12 are cut.

After the processing of S5 is executed, the control device 50 proceeds to the processing of S6. In S6, the control device 50 stops the drive source for the wire winding device (specifically, the motor for rotating the winding shaft 13 in rotation). In this way, by maintaining the rotational speed at least until all Y1 to Y12 of the 12 wires Y are in the cut state, at least a decrease in tension of the wire Y downstream of the wire cutting and sucking device 30 can be suppressed for the wire that is not cut, instead of immediately stopping the rotating winding shaft 13 after the control device 50 receives the operation stop signal.

After all Y1 to Y12 of the 12 wires Y are cut and sucked by the suction device 35, the operator brings a suction gun (not shown) close to the suction port 36a while stopping the movement of the cutter 32 and the suction device 35. Then, after the plurality of wires Y are cut by a cutter (not shown) at the tip of the suction gun, the plurality of wires Y are sucked and held by the suction gun.

After that, for example, in accordance with an operation by the operator, as a process of S7, the control device 50 controls the cutter 32 and the suction device 35 to start moving toward the retracted position (the position shown in fig. 2), that is, from the other side toward one side in the arrangement direction. Specifically, the control device 50 operates the 2 nd solenoid valve 38 to the 2 nd position. When the 2 nd electromagnetic valve 38 is operated to the 2 nd position, compressed air is supplied to the cylinder 37 to move the piston rod 37a in the contraction direction (left direction in fig. 5). When the piston rod 37a is moved in the contracting direction, both the cutter 32 and the suction device 35 move from the other side in the arrangement direction to one side.

[5. Effect ]

According to the above-described main embodiment, the cutter 32 and the suction device 35 are moved at a low speed with respect to the plurality of wires that stably run, so that the plurality of wires Y aligned in the alignment direction can be sequentially cut and sucked one by one. Therefore, the yarn Y cut by the cutter 32 can be reliably sucked by the suction device 35 while the blade 33 is prevented from being curled in a short time. Further, the cut filaments can be suppressed from being entangled.

Further, according to the main embodiment, for example, the control of stopping the godet rollers 4a and 4b is not performed until all Y1 to Y12 of the 12 yarns Y are in the cut state. That is, only when some of the 12 yarns Y1 to Y12 are in the cut state, the godets 4a and 4b are not stopped, and are not decelerated to such an extent that the tension of the yarn Y is reduced. Accordingly, the tension of the wire Y that is not cut can be suppressed from decreasing until all Y1 to Y12 of the 12 wires Y are in the cut state. Accordingly, all of Y1 to Y12 of the yarn Y traveling in the yarn traveling direction can be reliably cut.

[6. Expansion example ]

In the above-described main embodiment, the control of stopping the godets 4a and 4b is not performed until all Y1 to Y12 of the 12 yarns Y are in the cut state, but is not necessarily limited thereto. For example, when only the wire Y1 on the nearest side in the arrangement direction of the 12 wires Y1 to Y12 is in the cut state, the control of stopping the godets 4a and 4b is not performed until at least the plurality of wires Y (for example, the wire Y1 and the wire Y2) are in the cut state, the control of stopping the godets 4a and 4b is not performed. That is, even if all Y1 to Y12 of the 12 wires Y are not necessarily in the cut state, the godet rollers 4a and 4b are not stopped at least until the wire Y1 is in the cut state, and thus the wire Y1 can be cut at least reliably.

In the main embodiment, after all Y1 to Y12 of the 12 yarns Y are cut, the rotation of the 1 st godet 4a and the 2 nd godet 4b is stopped. That is, the control device 50 does not immediately stop the rotation of the two godet rollers 4a and 4b even when receiving the operation stop signal, and continues the rotation while maintaining the rotation speeds of the two godet rollers 4a and 4 b. However, if the tension of the yarn Y that is not cut can be suppressed from decreasing, the method is not limited to the above, and the rotation speeds of the two godet rolls 4a and 4b may not be reduced at least until the control device 50 receives the operation stop signal and until all Y1 to Y12 of the 12 yarns Y are in the cut state. Therefore, the control device 50 may increase the rotational speeds of the two godet rollers 4a and 4b until all Y1 to Y12 of the 12 yarns Y are in the cut state after receiving the operation stop signal.

In the above-described main embodiment, the rotation speeds of the two godet rolls 4a and 4b are not reduced after the control device 50 receives the operation stop signal, but the present invention is not limited to this. For example, if the rotation speed of at least one of the two godets 4a, 4b (for example, the 1 st godet 4a closer to the wire cutting and sucking device 30 than the 2 nd godet 4 b) is not decelerated, the tension of the wire Y that is not cut can be suppressed from decreasing.

In the above-described main embodiment, the rotation speed of the godet rollers 4a and 4b is not reduced after the control device 50 receives the operation stop signal, but the tension of the yarn Y that is not cut may be suppressed instead of or in addition to the rotation speed of the godet roller disposed downstream of the yarn cutting and suctioning device 30.

In the main embodiment, the thread limiting thread guide 20 having the plurality of grooves 20a arranged in the left-right direction corresponding to the plurality of threads Y is provided. However, this thread limiting thread guide 20 is not necessarily configured to cut and suck the plurality of threads Y by the cutter 32 and the suction device 35 in a state where the tension of the plurality of threads Y is suppressed from decreasing. That is, the present application can be applied to a spinning machine without the yarn limiting yarn guide 20. The present application is also applicable to a spinning machine including the yarn limiting yarn guide 20, but retracted from the plurality of yarns Y, for example, when the plurality of yarns Y are cut and sucked by the cutter 32 and the suction device 35.

In the above-described main embodiment, the description has been made taking an example in which the cutter 32 and the suction device 35 are moved relative to the plurality of wires Y to bring the plurality of wires Y close to the cutter 32 and the suction device 35. However, the movement of the cutter 32 and the suction device 35 with respect to the plurality of wires Y is not limited to the case of bringing the plurality of wires Y close to the cutter 32 and the suction device 35. For example, the plurality of wires Y may be moved relative to the cutter 32 and the suction device 35, or the cutter 32 and the suction device 35 may be moved relative to the plurality of wires Y, and the plurality of wires Y may be moved relative to the cutter 32 and the suction device 35. These modifications will be described below.

[8. Modification ]

Next, the following describes the 1 st modification and the 2 nd modification, in which the thread limiting thread guide 20 and the thread cutting suction device 30 according to the present embodiment are modified. The common configuration with the wire cutting and sucking device 30 will be mainly described with respect to a configuration different from that of the wire cutting and sucking device 30.

[8-1. 1 st modification ]

Fig. 6 is a schematic view showing an example of the thread limiting thread guide 20A and the thread cutting and suctioning device 30A according to modification 1. The thread restricting guide 20A is formed in a comb-like shape having a plurality of grooves 20Aa arranged in the left-right direction corresponding to the plurality of threads Y, and the plurality of threads Y pass through the plurality of grooves 20Aa, respectively, like the thread restricting guide 20 (see fig. 2, for example).

The yarn cutting and suctioning device 30A according to modification 1 is different from the yarn cutting and suctioning device 30 in which the cutter 32 and the suctioning device 35 move from one side to the other side in the arrangement direction, in that the yarn limiting yarn guide 20A moves from the other side in the arrangement direction when cutting and suctioning the plurality of yarns Y. That is, in modification 1, the thread cutting and suctioning device 30A does not move, and the thread limiter 20A moves so that the plurality of threads Y approach the thread cutting and suctioning device 30A.

As shown in fig. 6, the wire cutting and suctioning device 30A is provided with a cylinder 39 having a stroke larger than that of the cylinder 37, without the cylinder 37 (see fig. 2, for example). The air cylinder 39 moves the wire limiting guide 20A relative to the cutter 32 and the suction device 35. The cylinder 39 has a piston rod 39a and is disposed in the holder 31 serving as a base. The piston rod 39a is connected to an end portion of one side of the wire guide 20A in the arrangement direction. When the cylinder 39 is driven, the piston rod 39a expands and contracts in the left-right direction, and accordingly, the wire is restricted from advancing and retreating in the left-right direction by the wire guide 20A. The position of the thread limiting thread guide 20A shown in fig. 6 is the position in which the spinning tractor 1 is in operation. In addition, even if the piston rod 39a expands and contracts, the holder 31 does not move.

In S3 of the operation stop process, the control device 50 controls the thread limiter 20A to start moving from the other side in the arrangement direction to one side instead of controlling the cutter 32 and the suction device 35 to start moving from the one side in the arrangement direction to the other side. Specifically, the piston rod 39a is operated in the contraction direction, and the wire limiting guide 20A is moved from the other side in the arrangement direction to one side (left direction in fig. 5). At this time, the thread limiter 20A moves from the other side to one side in the arrangement direction while maintaining the interval in the arrangement direction between one thread Yn (n is an integer) and the thread Y (n+1) adjacent to the one thread Yn. That is, the interval between the yarn Yn and the yarn Y (n+1) in the arrangement direction does not change before and after the plurality of yarns Y approach the cutter 32 and the suction device 35. In this way, the cutter 32 and the suction device 35 are moved relative to the plurality of wires Y.

The wire-limiting wire guide 20A moves from the other side toward one side (left direction in fig. 6) in the arrangement direction at a low speed of, for example, 20 mm/sec. The movement speed of the thread guide 20A is limited by the thread from the other side to one side in the arrangement direction, and can be reduced by, for example, reducing the operation speed of the piston rod 39a that is operated in the contraction direction.

For example, d is the interval between one yarn Yn (n is an integer) of the plurality of yarns Y arranged in the arrangement direction and the yarn Y (n+1) adjacent to the yarn Yn on the other side in the arrangement direction. The time from the cutting of the yarn Yn to the cutting of the yarn Y (n+1) is t, and the moving speed of the yarn limiting yarn guide 20A moving from the other side to one side in the arrangement direction is u. At this time, the thread limiting guide 20A can be moved from the other side to the one side in the arrangement direction at a movement speed at which the relation "u.ltoreq.d/t", that is, the relation "u.ltoreq.d/5", is established while ensuring the distance d between the thread Yn and the thread Y (n+1). Therefore, the plurality of threads Y aligned in the alignment direction can be sequentially cut one by one.

In this way, the thread limiting thread guide 20A and the thread cutting suction device 30A according to modification 1 can provide the same operational effects as those described in the above-described main embodiment. That is, since the plurality of wires Y aligned in the alignment direction can be sequentially cut and sucked one by one, the wires Y cut by the cutter 32 can be reliably sucked by the suction device 35 while the blade 33 is prevented from being curled in a short time. Further, for example, control to stop the godet rollers 4a and 4b is not performed until all Y1 to Y12 of the 12 yarns Y are cut. Therefore, as with the operation and effect described in the above-described main embodiment, the tension of the wire Y that is not cut can be suppressed from decreasing until all Y1 to Y12 of the 12 wires Y are in the cut state. Accordingly, all of Y1 to Y12 of the yarn Y traveling in the yarn traveling direction can be reliably cut.

Further, according to the thread limiting guide 20A and the thread cutting suction device 30A of modification 1, the thread Y can be cut in a state where the thread is fixed without moving the cutter 32, and therefore, the thread Y can be cut in a stable state without being affected by vibration or the like due to movement. Further, the wire limiting guide 20A moves while ensuring the interval d between the wire Yn (n is an integer) and the wire Y (n+1). That is, the interval d is the same during the operation of the spinning machine 1 (i.e., during the spinning production) and when the operation of the spinning machine 1 is stopped and the yarn Y is cut and sucked by the yarn cutting and sucking device 30A. Therefore, even when the thread restricting thread guide 20A moves relative to the thread cutting and suctioning device 30A, the plurality of threads Y aligned in the alignment direction can be reliably cut one by one and suctioned one by one.

The thread limiting thread guide 20A and the thread cutting suction device 30A according to modification 1 can be expanded in the same manner as the expansion example described in the above-described main embodiment.

In the modification 1 described above, the case where the wire limiting guide 20A is moved to bring the plurality of wires Y close to the wire cutting and suctioning device 30A when cutting and suctioning the plurality of wires Y is performed has been described, but the mechanism for bringing the plurality of wires Y close to the wire cutting and suctioning device 30A is not limited to the wire limiting guide 20A. For example, instead of the wire limiting guide 20A having the plurality of grooves 20Aa arranged in the left-right direction corresponding to the plurality of wires Y, a guide having one or a plurality of grooves, for example, a hook shape, which can pass through the plurality of wires Y may be provided. In this case, the yarn guides are moved from the other side toward one side in the arrangement direction so as to hook the plurality of yarns Y through one or more grooves, whereby the plurality of yarns Y arranged in the arrangement direction can be cut and sucked.

[8-2. 2 nd modification ]

Fig. 7 is a schematic view showing an example of the thread limiting thread guide 20A and the thread cutting and suctioning device 30B according to modification 2. The thread restricting guide 20A has the same structure as the thread restricting guide 20A of modification 1, and a plurality of threads Y are passed through the plurality of grooves 20 Aa.

In the yarn cutting and suctioning device 30B according to modification 2, when cutting and suctioning the plurality of yarns Y, both the movement of the cutter 32 and the suction device 35 from one side to the other side in the arrangement direction and the movement of the yarn limiter 20A from the other side to one side in the arrangement direction are performed simultaneously. The thread cutting and suctioning device 30B according to modification 2 moves the cutter 32 and the suctioning device 35 relative to the plurality of threads Y in this manner. That is, in modification 2, both the thread cutting and suctioning device 30B and the thread limiting guide 20A move so that the plurality of threads Y approach the thread cutting and suctioning device 30B.

As shown in fig. 7, the yarn cutting and suctioning device 30B includes both the air cylinder 37 described with reference to fig. 2 and (a) and (B) of fig. 5 in the main embodiment and the air cylinder 39 described with reference to fig. 6 in the modification 1.

In S3 of the operation stop time process, the control device 50 controls the cutter 32 and the suction device 35 to start moving from one side to the other side in the arrangement direction, and controls the thread restricting guide 20A to start moving from the other side to the one side in the arrangement direction. Specifically, the piston rod 37a is operated in the expansion direction, and the piston rod 39a is operated in the contraction direction. In this way, the cutter 32 and the suction device 35 can be moved relative to the plurality of wires Y. In addition, the thread limiting thread guide 20A can move from the other side to one side in the arrangement direction while maintaining the interval in the arrangement direction between one thread Yn (n is an integer) and the thread Y (n+1) adjacent to the one thread Yn.

The relative speed of the cutter 32 and the suction device 35 to the plurality of wires Y is preferably low, for example, 20 mm/sec. For example, by slowing down both the operation speed of the piston rod 37a that operates in the expansion direction and the operation speed of the piston rod 39a that operates in the contraction direction, the relative speeds of the cutter 32 and the suction device 35 with respect to the plurality of wires Y can be made low.

For example, d is the interval between one yarn Yn (n is an integer) of the plurality of yarns Y arranged in the arrangement direction and the yarn Y (n+1) adjacent to the yarn Yn on the other side in the arrangement direction. The time from the cutting of the yarn Yn to the cutting of the yarn Y (n+1) is t, the moving speed of the cutter 32 and the suction device 35 from one side to the other side in the arrangement direction is V, and the moving speed of the yarn limiting guide 20A from the other side to one side in the arrangement direction is U. At this time, the moving speed of the cutter 32 and the suction device 35 with respect to the yarn Y is (v+u). At this time, the cutter 32, the suction device 35, and the thread limiter 20A can be moved at a movement speed at which the relation "v+u.ltoreq.d/t", that is, the relation "v+u.ltoreq.d/5", is established (in particular, the thread limiter 20A can be moved while ensuring the distance d between the thread Yn and the thread Y (n+1)). Therefore, the plurality of threads Y aligned in the alignment direction can be sequentially cut one by one. Further, the wire limiting guide 20A can move while securing the interval d between the wire Yn (n is an integer) and the wire Y (n+1). That is, the interval d is the same when the yarn cutting and sucking device 30B cuts and sucks the yarn Y during the operation of the spinning machine 1 and when the operation of the spinning machine 1 is stopped. Therefore, even when the thread restricting thread guide 20A moves relative to the thread cutting and sucking device 30B, the plurality of threads Y aligned in the alignment direction can be reliably cut and sucked one by one in sequence.

In this way, the thread limiting thread guide 20A and the thread cutting suction device 30B according to modification 2 can provide the same operational effects as those described in the above-described main embodiment. That is, since the plurality of wires Y aligned in the alignment direction can be sequentially cut and sucked one by one, the wires Y cut by the cutter 32 can be reliably sucked by the suction device 35 while the blade 33 is prevented from being curled in a short time. Further, for example, control to stop the godet rollers 4a and 4b is not performed until all Y1 to Y12 of the 12 yarns Y are cut. Therefore, as with the operation and effect described in the above-described main embodiment and modification 1, the tension of the wire Y that is not cut can be suppressed from decreasing until all Y1 to Y12 of the 12 wires Y are in the cut state. Accordingly, all of Y1 to Y12 of the yarn Y traveling in the yarn traveling direction can be reliably cut.

Further, according to the thread limiting thread guide 20A and the thread cutting and sucking device 30B of modification 1, the movement amount of the cutter 32 and the sucking device 35 can be made smaller than the cutter 32 and the sucking device 35 described in the above-described main embodiment, and therefore, the cylinder 37 can be made compact. Further, since the movement amount of the wire limiting wire guide 20A can be made smaller than the wire limiting wire guide 20A described in the above modification 1, the cylinder 39 can be made compact. In this way, the amount of movement of the thread cutting and sucking device 30B with respect to the plurality of threads, which is required to cut and suck the plurality of threads Y, can be dispersed into the amount of movement of the cutter 32 and the sucking device 35, and the amount of movement of the thread limiter 20A. Therefore, the peripheral devices (in particular, the air cylinders 37 and 39) of the yarn cutting and suctioning device 30B, and thus the entire device, can be prevented from being enlarged, and all of the plurality of yarns Y aligned in the alignment direction can be sequentially cut and suctioned one by one.

The thread limiting thread guide 20A and the thread cutting suction device 30B according to modification 2 can be expanded in the same manner as the expansion example described in the above-described main embodiment.

In the modification 2 described above, the case where both the wire cutting and suctioning device 30B and the wire limiting guide 20A are moved to bring the plurality of wires Y close to the wire cutting and suctioning device 30B when cutting and suctioning the plurality of wires Y is performed has been described, but the mechanism for bringing the plurality of wires Y close to the wire cutting and suctioning device 30B is not limited to the wire limiting guide 20A. For example, as also described in modification 1, instead of the thread limiting thread guide 20A having the plurality of grooves 20Aa arranged in the left-right direction corresponding to the plurality of threads Y, a thread guide having one or a plurality of grooves, for example, hooks, which can pass through the plurality of threads Y may be used.

Claims

1. A spinning tractor is characterized by comprising:

2. The spinning tractor of claim 1, wherein,

3. The spinning tractor of claim 1, wherein,

4. The spinning tractor of claim 1, wherein,

5. The spinning tractor according to claim 1 to 4,

6. The spinning tractor according to claim 1 to 5, characterized in that,

when the plurality of wires are sequentially cut and sucked, at least one of the cutter and the suction device is moved so that v is equal to or less than 5d and the plurality of wires are brought close to the cutter and the suction device.

7. The spinning tractor according to any one of claims 1 to 6, characterized in that,