JP6295922B2 - Preparation method of lap edge in comber - Google Patents

Description

  The present invention relates to a method for preparing a lap end portion in a comber, and more specifically, in a comber equipped with a peeling device that peels off a lap end portion of a full lap newly placed on a lap roller at the time of lap replacement from the full lap by airflow. The present invention relates to a wrap end preparation method.

  In the comber, when the number of laps in use, that is, the old wrap is reduced, a lap splicing is performed in which the end of the new wrap (full wrap) is overlapped and joined to the end of the old wrap. Conventionally, the following method has been disclosed as a method for automatically performing the lap joint (see Patent Document 1). As shown in FIGS. 5A to 5C, the comber that performs this method is supported at the distal ends of a pair of swivel arms 52 that are provided so that their base ends are rotatable about the rotation center of the lap roller 51. And a guide plate 54 for guiding the compressed air ejected from the nozzle 53. Then, with the full lap FL placed on the pair of lap rollers 51, the full lap FL is rotated in the wrap feeding direction (clockwise in FIG. 5A) and the suction nozzle 55 having a gripping portion. To suck the wrap end LE. Next, as shown in FIG. 5B, the sucked lap end LE is gripped by the gripping portion. Thereafter, the full wrap FL is rotated in the wrap winding direction to cut the wrap end portion LE. Next, in a state where the full wrap FL is rotated in the wrap feeding direction, the nozzle 53 is disposed at the rising position indicated by the solid line in FIG. LE is peeled off by the jet stream.

JP-A-4-257324

  In the prior art, the wrap end LE can be peeled off from the full wrap FL by the jet air flow by disposing the nozzle 53 at the raised position and injecting the compressed air. However, in order to overlap the wrap end portion LE peeled from the full wrap FL with the end portion Lo (illustrated in FIG. 6) of the old wrap, the compressed air is injected from the nozzle 53 arranged at the raised position, as shown in FIG. Thus, licking 56 is likely to occur when the nozzle 53 is rotated to a position where the guide plate 54 extends substantially horizontally. When the licking 56 occurs, the wrap end portion LE is difficult to peel off, so that the wrap end portion LE extends and fails in the lap joint or causes contactor clogging. The cause of the occurrence of the licking 56 may be the wrap production in the previous process (for example, wrap former), or the failure.

  The present invention has been made in view of the above problems, and its purpose is to peel off the end of a full wrap without causing licking, regardless of whether or not the wrap in the previous process is possible. It is an object of the present invention to provide a method for preparing a lap end in a comb that enables the above.

  The wrap end preparation method in the comb that solves the above-mentioned problem is a lap end in a comb that includes a peeling device that peels off the lap end of a full lap newly placed on the lap roller by airflow when replacing the lap. It is a part preparation method. Then, the wrap end portion of the full lap placed on the lap roller is sucked by the suction nozzle while the wrap roller is rotated forward and the full wrap is rotated forward, and then the wrap roller is reversed. Then, the sucked wrap end portion is wound again around the full wrap, and the wrap end portion is cut in a state of being gripped by a wrap gripping device during or after winding.

  According to this configuration, the wrap end portion, which is peeled off from the full wrap by the air current when the lap is replaced, is a portion wound once around the full wrap after being peeled off from the full wrap by the suction nozzle. When the wrap end is peeled off from the full wrap formed in the previous step, a strong force is required to peel off the portion where the fibers of the wound wrap are entangled with each other. However, since the peeling device peels off the wrap end portion by the airflow, the peeling force is weak and licking is likely to occur. However, the full wrap prepared by the wrap end preparation method of the present invention is peeled once and the wrap end is peeled off again, so that licking does not occur even if the peeling force is weak like a peeling device. The wrap end can be peeled off. Therefore, it is possible to peel the lap end portion of the full lap in a state where there is no licking without being influenced by whether or not the wrap is performed in the previous process.

  It is preferable that a length for winding the sucked wrap end portion around the full lap again is longer than a path length from the full wrap to the lap nip point of the carrier roller. According to this configuration, even if a full wrap is supplied in a state where licking is likely to occur from the previous process, at least the wrap end portion of the length that is peeled off from the full wrap by the peeling device and held by the carrier roller is peeled off once. Therefore, the wrap end can be peeled off without causing licking regardless of the type of fiber and the performance of the previous process.

  When the sucked wrap end is wound around the full wrap again, the suction of the suction nozzle may be stopped. If the suction of the suction nozzle is stopped when the wrap end is re-wrapped, the wrapping force is weaker than when wrapping while sucking. As a result, licking does not occur even if the force of the airflow required for peeling by the peeling device is weak.

  According to the present invention, it is possible to peel off the end portion of a full wrap without causing licking without being affected by whether or not the wrap in the previous process is completed.

(A) is a schematic side view of a combing head, (b) is the elements on larger scale of (a). (A), (b) is a schematic side view which shows the suction process which attracts | sucks the lap | wrap edge part of a full wrap. (A) is a schematic side view which shows the rewinding state of the wrap end part of a full wrap, (b) is a schematic side view which shows the cutting state of the wrap end part of a full wrap. (A) is a schematic side view which shows the state which peels the lap | wrap edge part of a full wrap, (b) is a schematic side view which shows the state by which the peeling apparatus has been arrange | positioned in the standby position. (A)-(c) is a schematic side view explaining a prior art. The schematic side view which shows the generation | occurrence | production state of licking.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 and 2. In the specification of the present application, for the sake of convenience, the left side of FIG.

The comber generally includes a plurality of (for example, eight) combing heads.
As shown in FIG. 1, the combing head 11 includes a pair of wrap rollers 12 on which a wrap bobbin B around which a wrap L is wound is placed, and a combing portion 13 is provided below (downstream side) of the wrap rollers 12. It has been. The combing unit 13 includes a nipper device 14, a combing cylinder 15, detaching rollers 16 arranged in two front and rear rows in front of the combing cylinder 15, and a top comb 17.

  The lap roller 12 is driven by a lap roller motor that can be driven independently of the combing portion 13. The lap roller motor is configured to be capable of forward / reverse rotation, and is driven via an inverter device that is controlled based on a command from the control device.

  The nipper device 14 has a feed roller 18 and a nipper frame 19 disposed so as to be able to swing back and forth above the combing cylinder 15. The nipper frame 19 is provided with a bottom nipper 20 at the front bottom thereof. . The nipper frame 19 is provided with a top nipper 21 that opens and closes at a predetermined timing in synchronization with the forward / backward swing of the nipper frame 19 and cooperates with the bottom nipper 20 to sandwich the lap L.

  A carrier roller 22 and a top roller 23 are disposed in front of the lap roller 12 and above the nipper device 14. The carrier roller 22 is provided such that it can be driven to rotate independently of the lap roller 12. The top roller 23 is provided so as to be movable between an operating position pressed against the carrier roller 22 from above and a retracted position moved upward from the operating position. The top roller 23 is held at the retracted position except during work for cutting the lap at the time of lap replacement, and the lap L can freely move on the carrier roller 22.

  Below the lap bobbin B placed on the lap roller 12, a suction nozzle 24 is provided with the tip positioned between the lap rollers 12. The suction nozzle 24 has an opening extending over the range of the axial length of the wrap bobbin B, and is connected to a negative pressure source (not shown) via a hose 25.

  The suction nozzle 24 is provided with a lap gripping device 26 at its tip. The wrap gripping device 26 has a curved portion 24a formed in a shape that curves outwardly near the rear lap roller 12 at the tip of the suction nozzle 24, and a gripping member 27 provided on the side facing the curved portion 24a. And is configured to be able to grip the wrap. The holding member 27 is provided so as to be tiltable to a holding position indicated by a two-dot chain line in FIGS. Specifically, the gripping member 27 has a base end that is formed flexibly, and a protrusion 27a is formed on the outer surface of the tip. A cylinder 28 is rotatably provided at the base end via a bracket 29 on the outer surface of the suction nozzle 24, and a protrusion 27a is rotatably connected to the piston rod 28a. The gripping member 27 is arranged at the gripping position when the piston rod 28a protrudes.

  The combing head 11 includes a peeling device 30 that peels off the lap end LE of the full wrap FL as a wrap winding newly placed on the lap roller 12 at the time of lap replacement from the full wrap FL by airflow. The peeling device 30 includes a pair of swivel arms 31 whose base ends are provided to be pivotable about the rotation center of the lap roller 12, a nozzle 32 supported on the distal end side of the swivel arm 31, and ejection from the nozzle 32. And a guide plate 33 for guiding the compressed air.

  The turning arm 31 is provided so as to be rotatable irrespective of the lap roller 12. As shown by a chain line in FIG. 1A, the swivel arm 31 is in a raised position where the guide plate 33 extends substantially parallel to a common tangent line between the front lap roller 12 and the full wrap FL, and a solid line in FIG. As shown, the guide plate 33 can turn to a standby position extending substantially parallel to the common tangent line of the carrier roller 22 and the top roller 23.

  The nozzle 32 has a slit extending over the range of the axial direction length of the lap bobbin B placed on the lap roller 12, and is connected to a compressed air supply source by a hose (not shown). The slit is formed so that the compressed air ejected from the nozzle 32 is ejected in a direction along the guide plate 33 toward the tip of the guide plate 33.

  The peeling device 30 is configured to replace the wrap end LE of the full wrap FL newly placed on the lap roller 12 with the carrier roller 22 and the top roller 23 when the lap is replaced. It guides to the position superposed with the end Lo. More specifically, when the lap end LE of the full lap FL newly placed on the lap roller 12 is peeled off from the full lap FL when the lap is replaced, the compressed air injection (air Injection). Then, the wrap end LE is moved downward from the raised position to the standby position while peeling the wrap while continuing air injection so as to guide the tip of the lap end LE toward the lap gripping portion of the carrier roller 22 and the top roller 23 ( It is designed to be rotated).

Next, the operation of the apparatus configured as described above will be described.
When the lap amount of the lap bobbin B is reduced to a preset value by the operation of the comber, the operation of the comber is stopped and the lap is exchanged.

  At the time of lap replacement, the lap L connected to the nipper device 14 from the lap bobbin B placed on the lap roller 12 through the carrier roller 22 protrudes from the carrier roller 22 to the rear side (lap roller 12 side). After being cut in such a state, the carrier roller 22 hangs downward. The lap L remaining on the wrap bobbin B is removed by suction by the suction nozzle 24, and after the wrap bobbin B is discharged from the lap roller 12, the full lap FL is placed on the lap roller 12.

  After the full wrap FL is placed on the lap roller 12, an operation of peeling the lap end LE of the full wrap FL by the peeling device 30 is performed. Prior to the end peeling operation of the full wrap FL by the peeling device 30, the wrap end preparation is performed.

  In the wrap end preparation method of this embodiment, first, as shown in FIG. 2A, the wrap roller 12 is rotated forward while the wrap end LE of the full wrap FL on the lap roller 12 is sucked by the suction nozzle 24. Is done. As shown in FIG. 2B, after the lap roller 12 continues to rotate forward for a preset time and the lap end LE having a predetermined length or more is sucked into the suction nozzle 24, the lap roller 12 is rotated. Is stopped. The predetermined length refers to the wrap end portion LE that has been rewound when the wrap end portion LE is wound again around the full wrap FL and cut with the suction nozzle 24, as will be described later. Means a length longer than the path length from the full wrap FL to the lap nip point of the carrier roller 22. The lap nip point of the carrier roller 22 is a position where the carrier roller 22 holds the lap L in cooperation with the top roller 23.

  Next, the lap roller 12 is driven in reverse to reverse the full lap FL, and the lap end LE sucked by the suction nozzle 24 is pulled out from the suction nozzle 24 as shown in FIG. Wrapped around the wrap FL.

  When the wrap end portion LE having a predetermined length is wound around the full wrap FL by the reverse rotation of the wrap roller 12, the cylinder 28 is protruded and operated as shown in FIG. Is disposed at the gripping position, and the wrap end portion LE is cut between the suction nozzle 24 and the rear lap roller 12 in a state where the wrap end portion LE is gripped by the gripping member 27 and the curved portion 24a. The lap roller 12 is stopped after the lap end portion LE has passed the lap roller 12 on the rear side, and the wrap end preparation work is completed. Further, the cylinder 28 is operated to place the gripping member 27 in the open position, and the cut end of the gripped lap end LE is sucked and removed by the suction nozzle 24.

  Next, the lap roller 12 is rotated forward so that the full lap FL is rotated forward, and the peeling device 30 is disposed at the raised position, and the injection of compressed air from the nozzle 32 is started. And as shown to Fig.4 (a), the lap end part LE of the part re-wrapped by the full wrap FL is injected from the nozzle 32 from the time of passing through the position corresponding to the nozzle 32 of the peeling apparatus 30. The wrap end portion LE is peeled off from the full wrap FL by the action of the compressed air. As shown by a solid line in FIG. 4B, the peeling device 30 is rotated to the standby position (lowering position) in a state where the jet of compressed air from the nozzle 32 is continued. As the peeling device 30 is rotated to the standby position, the rewrapped portion of the lap end portion LE is peeled off from the full lap FL by the action of the jet air current, and moves along the guide plate 33.

  When the wrap end portion LE is peeled off from the full wrap FL formed in the previous step, a strong force is required to peel off the wrap L when the fibers of the wrapped lap L are entangled with each other. Since the peeling device 30 peels off the wrap end portion LE by the airflow, the peeling force is weak and licking is likely to occur. However, the wrap end portion LE that the peeling device 30 peels off from the full wrap FL by the air current at the time of lap replacement is a portion wound once around the full wrap FL after being peeled off from the full wrap FL by the suction nozzle 24. Therefore, even if the peeling force is weak like the peeling device 30, the wrap end portion LE can be peeled without causing licking.

  After the tip of the lap end LE has passed the gripping point of the carrier roller 22, the air injection of the peeling device 30 and the rotation of the lap roller 12 are stopped. Thereafter, the top roller 23 is arranged at the pressing position, and the top roller 23 is pressed by the top roller 23 in a state where the tip of the lap end portion LE is overlapped with the end portion Lo of the lap L following the nipper device 14 through the carrier roller 22, and the lap joint Work is done. Thereafter, the combing operation is resumed.

According to this embodiment, the following effects can be obtained.
(1) The wrap end preparation method in the comber is a comb that includes a peeling device 30 that peels off the lap end LE of the full wrap FL newly placed on the lap roller 12 at the time of lap replacement from the full wrap FL by airflow. It is the lap edge part preparation method in. Then, the lap end LE of the full wrap FL placed on the lap roller 12 is sucked by the suction nozzle 24 while rotating the wrap roller 12 forward and rotating the full wrap FL forward, and then reverses the lap roller 12. Then, the sucked wrap end portion LE is wound around the full wrap FL again, and after wrapping, the wrap end portion LE is cut while being gripped by the wrap gripping device 26.

  The full wrap FL in which the wrap end portion LE is prepared by this wrap end portion preparation method is licked even if the wrap end portion LE is once peeled off and rewinded, even if the peeling force is weak like the peeling device 30. The wrap end portion LE can be peeled off without the occurrence of the above. Accordingly, it is possible to peel off the wrap end portion LE of the full wrap FL in a state where there is no licking, regardless of whether or not the wrap in the previous process is performed.

  (2) The length at which the sucked wrap end portion LE is wound around the full wrap FL again is longer than the path length from the full wrap FL to the lap nip point of the carrier roller 22. According to this configuration, the wrap end portion LE of the portion that is peeled off from the full wrap FL by the peeling device 30 and is gripped by the carrier roller 22 is the portion that has been peeled and re-wound once, so Regardless of the performance of the process, the wrap end LE can be peeled off without causing licking.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The length for winding the sucked wrap end portion LE around the full wrap FL again may be equal to or shorter than the path length from the full wrap FL to the lap nip point of the carrier roller 22. Since licking is affected by the type of fiber and the performance of the previous process, the length of the rewinding may be slightly shorter as long as the fiber type and the performance of the previous process are less affected by licking.

  ○ The wrap cutting after re-wrapping the wrap end portion LE is not limited to the method in which the full wrap FL is reversed and cut, but may be performed by, for example, moving the suction nozzle 24 while holding the wrap end portion LE. .

  When the lap roller 12 is driven in reverse rotation, that is, when the lap end LE sucked by the suction nozzle 24 is wound around the full wrap FL again, the suction of the suction nozzle 24 may be stopped. In this case, when the wrap end portion LE is rewound, the wrapping force is weaker than when the wrap end LE is wound while being sucked by the suction nozzle 24, and no licking occurs even if the force of the airflow required for peeling by the peeling device 30 is weak. In addition, the amount of compressed air used by the peeling device 30 can be reduced.

  The timing for cutting the wrap end LE that has been re-wound around the full wrap FL in a state of being gripped by the wrap gripping device 26 of the suction nozzle 24 is not limited to after winding but may be during the winding.

O The speed of the lap roller 12 when the wrap end portion LE is rewound may be faster than the speed when the lap is fed out.
The peeling device 30 is not limited to a configuration in which the nozzle 32 and the guide plate 33 are supported on a pair of turning arms 31 whose base ends are provided to be rotatable around the rotation center of the lap roller 12. For example, the rotation center of the turning arm 31 may be set at a position different from the rotation center of the lap roller 12.

  The peeling device 30 is not limited to the configuration in which the nozzle 32 and the guide plate 33 are supported by the pair of turning arms 31. For example, the nozzle 32 provided with the guide plate 33 may be rotatably supported by the bracket, and the bracket may be provided so as to be linearly movable between the standby position and the raised position.

  The nozzle 32 may have a plurality of holes formed side by side instead of the slit for injecting compressed air.

  FL ... full wrap, LE ... wrap end, 12 ... wrap roller, 22 ... carrier roller, 24 ... suction nozzle, 26 ... wrap gripping device, 30 ... peeling device.

Claims (3)

A method for preparing a lap end in a comb having a peeling device that peels off a lap end of a full lap newly placed on a lap roller at the time of lap exchange by air flow,
The wrap end of the full lap placed on the lap roller is sucked by the suction nozzle while rotating the wrap roller forward and rotating the full wrap forward, and then sucking the wrap roller reversely A method of preparing a wrap end in a comb, wherein the wrap end is wound around the full wrap again, and the wrap end is gripped by a wrap gripping device during or after winding.   The wrap end preparation method for a comb according to claim 1, wherein a length for winding the sucked wrap end portion around the full wrap again is longer than a path length from the full wrap to a lap nip point of a carrier roller.   The method of preparing a wrap end in a comb according to claim 1 or 2, wherein when the sucked wrap end is wound around the full wrap again, suction of the suction nozzle is stopped.