JP2018159145A - Fine spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the thread breakage of a needle yarn upon knotting.SOLUTION: Provided is a fine spinning machine comprising: a spinning device performing spinning to generate a yarn Y; a winding device winding the yarn Y generated in the spinning device to form a package; and a piecing device, in the case the yarn is parted between the spinning device and the winding device, performing knotting between the yarn end of the needle yarn on the spinning device side and the yarn end of the bobbin yarn on the winding device side. The machine includes: a needle yarn suction member 71 sucking and holding the needle yarn; and a cutting member 77 cutting the needle yarn sucked by the needle yarn suction member 71.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a spinning machine equipped with a yarn splicing device.

  For example, Patent Document 1 discloses a spinning machine configured to wind a yarn generated by a spinning device with a winding device. In this spinning machine, a yarn splicing device for connecting and connecting yarns is provided between the spinning device and the winding device. In this spinning machine, when the yarn is divided between the spinning device and the winding device, the upper yarn on the spinning device side is sucked and held by the suction pipe and guided to the yarn joining device. The lower thread of the take-up device side is sucked and held with a suction mouse and guided to the yarn joining device, and then the yarn knot is performed.

  Here, the suction pipe and the suction mouth of Patent Document 1 are connected to a common blower duct. For this reason, when the upper thread and the lower thread are entangled in the blower duct, high tension is applied to the thread, and there is a possibility that thread breakage may occur when the yarn is tied. Therefore, in Patent Document 1, a cutter for cutting the yarn end of the lower yarn sucked by the suction mouse is provided, and by cutting the yarn end of the lower yarn by this cutter, the upper yarn in the blower duct is provided. And the lower thread are prevented from getting entangled.

JP 2002-249935 A

  However, in Patent Literature 1, since the yarn end of the upper yarn is not cut, the upper yarn is continuously sucked, and the yarn end is sucked into the blower duct to increase the suction length. As a result, the tension of the upper yarn is likely to be excessive. It has become a thing. Further, as the suction length increases, the area where the upper thread contacts the inside of the pipe also increases, and the frictional force generated between the upper thread and the pipe also increases. In this situation, if a force opposite to the direction in which the yarn knot is started and sucked by the upper yarn is applied, the problem remains that the upper yarn is easily broken.

  The present invention has been made in view of the above problems, and an object thereof is to prevent thread breakage of an upper thread at the time of yarn knotting.

  A spinning machine according to the present invention includes a spinning device that produces a yarn by spinning, a winding device that winds the yarn produced by the spinning device to form a package, and the spinning device and the winding device. A spinning machine comprising: a yarn joining device that connects and connects the yarn end of the upper yarn on the spinning device side and the yarn end of the lower yarn on the winding device side when the yarn is divided between them; An upper thread suction member that sucks and holds the yarn end of the upper thread and guides it to the yarn joining device; an upper thread suction pipe that is connected to the upper thread suction member and draws the thread end of the suctioned upper thread into the tube; And a cutting member that cuts the yarn end of the upper yarn in the upper yarn suction pipe.

  According to the present invention, it is possible to cut the end of the upper thread that is sucked and held, so that it is possible to prevent the tension of the upper thread from becoming excessive. Therefore, the thread breakage of the upper thread at the time of yarn knotting can be prevented.

  In the present invention, a lower thread suction member that sucks and holds the thread end of the lower thread and guides it to the yarn joining device, and a lower thread that is connected to the lower thread suction member and draws the sucked thread end of the lower thread into the pipe. It is preferable to further include a yarn suction pipe and a lower thread cutting member that cuts the yarn end of the lower thread in the lower thread suction pipe.

  According to the present invention, since the yarn end of the lower yarn held by suction can be cut, it is possible to prevent the tension of the lower yarn from becoming excessive. Therefore, breakage of both the upper thread and the lower thread at the time of yarn knotting can be prevented.

  In the present invention, it is preferable that the lower thread suction pipe is joined and connected to a middle portion of the upper thread suction pipe, and the cutting member is also used as the lower thread cutting member.

  By doing this, only one cutting member is required, which is advantageous from the viewpoint of cost and space.

  In the present invention, the upper yarn end may be cut after the lower yarn end is cut.

  The lower yarn is sucked by the amount drawn from the package, while the upper yarn is sucked by the amount spun from the spinning device. Therefore, even if the upper end of the upper thread is cut quickly, the length sucked after the cutting gradually increases, and the tension of the upper thread may not be reduced. Therefore, as described above, it is possible to effectively suppress an increase in the tension of the upper thread by cutting the upper thread after the lower thread.

  In the present invention, the upper thread is wound around the package after cutting the lower thread end and before the upper thread suction member sucks the upper thread end. The lower thread remaining in the pipe of the suction pipe may be pulled out to the lower thread suction member side from the middle part.

  Even if the thread end of the lower thread is cut with the cutting member in the upper thread suction pipe, a part of the lower thread remains in the upper thread suction pipe so that it will be entangled with the upper thread to be sucked later. There is a fear. Therefore, as described above, after the lower end of the lower thread is cut and before the upper end of the upper thread is sucked, the lower end of the lower thread is pulled out to the lower thread suction member side from the middle portion, thereby obtaining the upper thread. It is possible to prevent the upper thread and the lower thread from being entangled in the suction pipe.

  In the present invention, the yarn end of the upper yarn and the yarn end of the lower yarn may be cut before the yarn joining by the yarn joining device is started.

  When performing knotting, the upper thread and the lower thread are pulled to increase the tension, and thread breakage is likely to occur. Therefore, as described above, by cutting the yarn ends of the upper yarn and the lower yarn before the yarn knot is started, the yarn breakage at the time of the yarn knot can be effectively suppressed.

  In the present invention, the yarn joining device can be moved between a standby position where the yarn joining device does not contact the yarn and a regulation position which regulates the yarn passage in the yarn joining device by contacting the yarn. The yarn path regulating member moves to the regulating position before the yarn knotting by the yarn joining device is started, and before the yarn path regulating member moves to the regulating position, the yarn of the upper thread It is preferable to cut the end and the end of the lower thread.

  Before starting the yarn knotting, the yarn path regulating member comes into contact with the upper thread and the lower thread and regulates the yarn path, whereby the tension of the upper thread and the lower thread is increased. Therefore, as described above, the yarn breakage can be suppressed by cutting the upper thread and the lower thread in advance and reducing the tension before moving the yarn path regulating member to the regulation position.

  In the present invention, the yarn splicing device further includes an air injection device that injects air into the yarn, and before starting the air injection by the air injection device, the yarn end of the upper yarn and the yarn end of the lower yarn It is good to cut off.

  The slack of the yarn can be removed by injecting air into the yarn and blowing the yarn, but at that time, the yarn tension increases. Therefore, as described above, the yarn breakage can be suppressed by cutting the upper yarn end and the lower yarn end in advance and lowering the tension before starting the air injection.

  In the present invention, further comprising: a plurality of spinning units having the spinning device and the winding device; and a yarn joining cart movable between the plurality of spinning units, and the yarn joining cart includes the yarn A splicing device, the upper thread suction member, the upper thread suction pipe, and the cutting member may be provided.

  According to such a spinning machine, the yarn breakage of the upper yarn can be prevented when the yarn knotting is performed by the yarn joining cart. Furthermore, by providing the yarn joining device, the upper yarn suction member, the upper yarn suction pipe, and the cutting member in the yarn joining cart, it is not necessary to provide these devices and members for each spinning unit, and they can be shared.

1 is a front view showing an overall configuration of a spinning machine according to an embodiment. It is a side view of a spinning unit and a yarn splicing cart. It is a side view which shows a mode that a thread | yarn is attracted and held with the suction member of a yarn joining cart. It is a side view which shows a mode that a thread | yarn guide device guides a thread | yarn to a yarn splicing device. It is a side view showing the state where the yarn joining device is located at the yarn joining position. It is a schematic diagram which shows the suction | inhalation path | route of a suction member. It is a schematic diagram which shows the shutter cutter provided in the suction path. It is a perspective view of a yarn splicing device. It is a front view which shows a series of operation | movement of a yarn splicing part. It is a front view which shows a series of operation | movement of a yarn splicing part. It is the figure which looked at the slack propagation suppression member etc. from the top. It is sectional drawing in the XII-XII cross section of FIG. It is a timing chart which shows operation of each member at the time of yarn splicing. It is a schematic diagram which shows the suction state of the thread | yarn in a suction path. It is the figure which looked at the slack propagation suppression member etc. concerning a modification from the top.

[This embodiment]
(Overall structure of spinning machine)
A spinning machine (winding machine) according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the overall configuration of the spinning machine according to the present embodiment. A spinning machine (spinning machine) 1 shown in FIG. 1 includes a plurality of spinning units 2 (winding units) arranged in a predetermined arrangement direction (left-right direction in FIG. 1), and a yarn splicing carriage 3 movable in the arrangement direction. And a blower box 4 arranged on one end side in the arrangement direction, and a prime mover box 5 arranged on the other end side in the arrangement direction.

  Each spinning unit 2 produces a yarn Y by spinning the fiber bundle T sent from the draft device 10 with the spinning device 20, and forms the package P by winding the yarn Y around the bobbin B with the winding device 40. To do. The yarn splicing carriage 3 moves to the spinning unit 2 to perform yarn splicing when any one of the spinning units 2 has a yarn break caused by excessive tension or a yarn cut for removing a yarn defect. Do. In the blower box 4, a negative pressure source for supplying a negative pressure to each spinning unit 2 is disposed. Further, in the prime mover box 5, a drive source common to the spinning units 2 is disposed.

  In the spinning machine 1 of the present embodiment, one unit control unit 2a is provided for each predetermined number of spinning units 2, and controls the operation of each unit of the spinning unit 2. On the other hand, the yarn splicing cart 3 is provided with a cart control unit 3a (control unit), which controls the operation of each part of the yarn splicing cart 3. The unit control unit 2a and the cart control unit 3a are configured to exchange control signals with each other.

(Spinning unit)
FIG. 2 is a side view of the spinning unit 2 and the yarn splicing cart 3, FIG. 3 is a side view showing how the yarn is sucked and held by the suction member of the yarn splicing cart 3, and FIG. FIG. 5 is a side view showing a state in which the yarn is guided to the yarn joining device by the suction member 3, and FIG. 5 is a side view showing a state in which the yarn joining device is located at the yarn joining position. As shown in FIGS. 2 to 5, the side where the yarn path exists when viewed from the yarn joining cart 3 is defined as the front side, and the opposite side is defined as the rear side. In the following description, upstream and downstream in the traveling direction of the yarn Y during normal winding are simply referred to as “upstream” and “downstream”.

  The spinning unit 2 includes a draft device 10, a spinning device 20, a yarn storage device 30 (yarn supply unit), and a winding device 40 arranged in order from the upstream side to the downstream side. I have.

  The draft device 10 is provided near the upper end of the frame 6 of the spinning machine 1. The draft device 10 includes four draft rollers 11 to 14 including a back roller 11, a third roller 12, a middle roller 13, and a front roller 14 in order from the upstream side. A rubber apron belt 15 is wound around the middle roller 13. Each of the draft rollers 11 to 14 is rotationally driven at a predetermined rotational speed. The draft device 10 includes opposed rollers 11a to 14a arranged to face the draft rollers 11 to 14, respectively. The draft device 10 has a predetermined width by sandwiching and transporting the sliver S, which is a raw material of the fiber bundle T, between the rotating draft rollers 11 to 14 and the opposing rollers 11a to 14a facing the rotating rollers. The fiber bundle T is drawn (draft).

  The spinning device 20 is disposed immediately downstream of the front roller 14. The spinning device 20 spins the fiber bundle T supplied from the draft device 10 by twisting to produce a yarn Y. In this embodiment, the spinning device 20 employs a pneumatic device that twists the fiber bundle T using a swirling airflow, but other types can also be employed.

  The yarn storage device 30 is disposed between the spinning device 20 and the winding device 40. The yarn storage device 30 includes a storage roller 31, a yarn hooking member 32, and a motor 33. The storage roller 31 is configured to be able to temporarily store a predetermined amount of yarn Y around its outer peripheral surface, and is rotated by a motor 33. A yarn hooking member 32 capable of hooking the yarn Y is attached to the downstream end portion of the storage roller 31. The yarn hooking member 32 is attached so as to be rotatable relative to the storage roller 31.

  A permanent magnet is attached to one of the storage roller 31 and the yarn hooking member 32, and a magnetic hysteresis material is attached to the other. By these magnetic means, a resistance torque is generated when the yarn hooking member 32 rotates relative to the storage roller 31. When a force exceeding the resistance torque is applied to the yarn hooking member 32 (when a predetermined tension or more is applied to the yarn Y), the yarn hooking member 32 rotates relative to the storage roller 31, and the storage roller 31 The yarn Y wound around can be unwound. On the other hand, when the force exceeding the resistance torque is not applied to the yarn hooking member 32, the storage roller 31 and the yarn hooking member 32 rotate integrally, and the yarn Y is stored in the storage roller 31.

  In this way, the yarn storage device 30 unwinds the yarn Y when the tension of the downstream yarn Y increases, and releases the yarn Y when the tension of the downstream yarn Y decreases (the yarn Y is likely to loosen). It works to stop the trap. Thereby, the yarn accumulating device 30 can eliminate the slackness of the yarn Y and apply an appropriate tension to the yarn Y. Further, the yarn hooking member 32 operates so as to absorb the fluctuation of the tension applied to the yarn Y between the yarn accumulating device 30 and the winding device 40 as described above. It is possible to prevent the yarn Y between the device 20 and the yarn storage device 30 from being affected.

  Further, on the downstream side of the yarn storage device 30, a yarn path guide 34 for guiding the yarn Y drawn from the yarn storage device 30 to the downstream side is provided. The yarn path guide 34 guides the yarn Y drawn from the storage roller 31 so as to pass on the extended line of the rotation shaft of the storage roller 31. Therefore, in a state where the yarn hooking member 32 rotates with the yarn Y hung, the substantially conical balloon A is formed by the yarn Y being swung between the storage roller 31 and the yarn path guide 34. The

  A yarn monitoring device 21 that monitors the quality of the yarn Y is provided between the spinning device 20 and the yarn storage device 30. The yarn monitoring device 21 is configured to monitor the thickness of the traveling yarn Y by an optical sensor (not shown). The yarn monitoring device 21 detects a yarn defect of the yarn Y (a portion where the thickness of the yarn Y is abnormal). The yarn monitoring device 21 is not limited to an optical sensor, and may be a capacitive sensor, for example. Further, the yarn monitoring device 21 may detect a foreign matter included in the yarn Y as a yarn defect.

  In the vicinity of the yarn monitoring device 21, a cutter (not shown) for immediately cutting the yarn Y when the yarn monitoring device 21 detects a yarn defect of the yarn Y is disposed. The spinning unit 2 may cut the yarn Y by stopping the supply of air to the spinning device 20 and interrupting the generation of the yarn Y instead of the cutter.

  The winding device 40 is disposed on the downstream side of the yarn accumulating device 30 and forms the package P by winding the yarn Y around the bobbin B while traversing the yarn Y. The winding device 40 includes a cradle arm 41, a winding drum 42, and a traverse device 43.

  The cradle arm 41 is supported so as to be rotatable about a support shaft 44. The cradle arm 41 can rotatably support a bobbin B (package P) for winding the yarn Y. The winding drum 42 is rotationally driven in a predetermined direction at a constant rotational speed. The cradle arm 41 can rotate around the support shaft 44 to bring the outer peripheral surface of the bobbin B (package P) into contact with or away from the winding drum 42. In this way, by bringing the outer peripheral surface of the bobbin B (package P) into contact with the winding drum 42 that is rotationally driven, the bobbin B (package P) is driven to rotate in the winding direction, and the yarn Y is rotated on the outer peripheral surface. Can be rolled up.

  The traverse device 43 has a traverse guide 45 that can be engaged with the yarn Y. The traverse guide 45 is configured to reciprocate in a direction parallel to the axial direction of the winding drum 42 by a drive source (not shown). The traverse guide 45 engaged with the yarn Y is driven to reciprocate while the winding drum 42 is driven to rotate, whereby the yarn Y can be wound around the package P while traversing.

(Thread joining cart)
Next, the yarn joining cart 3 will be described. As shown in FIG. 1, a rail 7 is disposed on the frame 6 of the spinning machine 1 along the arrangement direction in which the spinning units 2 are arranged. The yarn joining cart 3 is configured to be able to travel on the rail 7 and can travel between the plurality of spinning units 2. The yarn joining cart 3 moves to the spinning unit 2 when a yarn breakage or yarn cut occurs in a spinning unit 2, and the yarn Y is divided between the spinning device 20 and the winding device 40. Perform splicing.

  As shown in FIGS. 2 to 4, the yarn joining cart 3 includes a yarn joining device 50, a suction pipe 71, a suction mouth 72, an advance / retreat mechanism 80, and a reverse drive mechanism 90 as main components. Yes.

  When the yarn Y is divided between the spinning device 20 and the winding device 40, the yarn joining device 50 is a yarn Y on the spinning device 20 side that is guided by the suction pipe 71 (hereinafter referred to as “upper yarn” as appropriate). And the yarn Y on the side of the winding device 40 guided by the suction mouse 72 (hereinafter referred to as “lower yarn” as appropriate). In a state where the yarn joining cart 3 has moved to the target spinning unit 2, the yarn joining device 50 is located between the yarn accumulating device 30 and the winding device 40 in the traveling direction of the yarn Y. Details of the yarn joining device 50 will be described later.

  The suction pipe 71 is configured to be rotatable in the vertical direction about a shaft 71a by a drive source (not shown) controlled by the carriage control unit 3a. As shown in FIG. 3, the suction pipe 71 rotates upward so that the tip of the suction pipe 71 is positioned in the vicinity of the downstream side of the spinning device 20 and sucks the upper yarn Y spun from the spinning device 20. It can be sucked and held. Further, as shown in FIG. 4, the suction pipe 71 guides the upper yarn Y to the yarn joining device 50 by rotating downward while sucking and holding the upper yarn Y spun from the spinning device 20. Can do.

  The suction mouse 72 is configured to be rotatable in the vertical direction about the shaft 72a by a drive source (not shown) controlled by the carriage control unit 3a. As shown in FIG. 3, the suction mouse 72 is rotated downward, so that the tip of the suction mouse 72 is positioned near the outer peripheral surface of the package P, and sucks and holds the lower thread Y drawn from the package P. be able to. Further, as shown in FIG. 4, the suction mouse 72 can guide the lower thread Y to the yarn joining device 50 by rotating upward while sucking and holding the lower thread Y pulled out from the package P. .

  FIG. 6 is a schematic diagram illustrating a suction path of the suction members (the suction pipe 71 and the suction mouth 72), and FIG. 7 is a schematic diagram illustrating a shutter cutter provided in the suction path. As shown in FIG. 6, an upper thread suction pipe 75 is connected to the suction pipe 71, and a lower thread suction pipe 76 is connected to the suction mouth 72. Further, a lower thread suction pipe 76 joins and is connected to the middle part of the upper thread suction pipe 75. The upper thread suction pipe 75 and the lower thread suction pipe 76 are attached to the yarn splicing carriage 3.

  The upper thread suction pipe 75 is configured to be connectable to a suction duct 8 provided in the frame 6 of the spinning machine 1. The suction duct 8 extends along the arrangement direction of the spinning machines 1 (the direction perpendicular to the paper surface of FIG. 6), and one end thereof is connected to the blower box 4. A plurality of connection portions 8a as shown in FIG. 6 are provided in the suction duct 8 in the arrangement direction, and when the yarn joining carriage 3 moves to the spinning unit 2, the upper yarn suction pipe is connected to the corresponding connection portion 8a. By connecting 75, a suction flow is generated in the suction pipe 71 and the suction mouth 72.

  A slit 75a orthogonal to the axial direction is formed downstream of the middle portion of the upper thread suction pipe 75, and a shutter cutter 77 that can be inserted into the slit 75a is disposed. As shown in FIG. 7, the shutter cutter 77 includes a support shaft 77a extending along the axial direction of the upper thread suction pipe 75 (the direction perpendicular to the paper surface of FIG. 7), and a movable blade 77b rotatable about the support shaft 77a. And a fixed blade 77c fixed to the support shaft 77a.

  As shown in FIG. 7 (a), the movable blade 77b is rotated so as to be inserted into the slit 75a as shown in FIG. 7 (b) from the state where the movable blade 77b protrudes outside the upper thread suction pipe 75. Then, the movable blade 77b crosses the upper thread suction pipe 75 and reaches the fixed blade 77c, and the thread end of the thread Y in the upper thread suction pipe 75 can be cut. The movable blade 77b is configured to be rotated by a drive source (not shown) controlled by the carriage control unit 3a.

  2 to 5, the advance / retreat mechanism 80 is configured to be able to move the yarn joining device 50 in a direction (front-rear direction) that approaches or separates from the yarn path at the time of winding. The yarn path at the time of winding is a straight line connecting the yarn path guide 34 to the outer peripheral surface of the package P as shown in FIG. The advance / retreat mechanism 80 includes a rail 81, a support bracket 82, and an air cylinder 83. The rail 81 is fixedly attached to the yarn joining cart 3 along the front-rear direction. A support bracket 82 is slidably attached to the rail 81 with respect to the rail 81. The yarn joining device 50 is fixed to the support bracket 82. The air cylinder 83 is a drive source for moving the support bracket 82 along the rail 81, and is controlled by the carriage control unit 3a. By extending and contracting the air cylinder 83, the yarn joining device 50 fixed to the support bracket 82 can be moved along the rail 81. The drive source for moving the yarn joining device 50 along the rail 81 may be not only the air cylinder 83 but also a cam mechanism.

  As shown in FIG. 5, at a position where the air cylinder 83 extends and the yarn joining device 50 approaches the yarn path at the time of winding (hereinafter referred to as “yarn joining position”), the suction pipe 71 and the suction mouth 72 are used. The guided yarn Y is introduced into the yarn joining device 50. On the other hand, as shown in FIG. 2, the air cylinder 83 contracts, and the yarn joining device 50 moves to a position away from the yarn path at the time of winding (hereinafter referred to as “retraction position”), whereby the yarn joining cart. It is possible to prevent the yarn joining device 50 and the yarn Y from interfering with each other during the movement between the three spinning units 2.

  The reverse drive mechanism 90 is a mechanism for rotating the package P in the drawing direction opposite to the winding direction. The reverse drive mechanism 90 includes a reverse rotation roller 91, a link mechanism 92, and an air cylinder 93. The reverse rotation roller 91 is attached to the link mechanism 92 and is rotationally driven in a direction opposite to the winding drum 42 by a motor (not shown) controlled by the carriage control unit 3a. A reverse rotation roller 91 and an air cylinder 93 are attached to the link mechanism 92 at appropriate positions. The air cylinder 93 is a drive source for expanding and contracting the link mechanism 92, and is controlled by the carriage control unit 3a.

  By extending the link mechanism 92 with the air cylinder 93, the reverse rotation roller 91 moves to a position where it contacts the package P (hereinafter referred to as "contact position") as shown in FIGS. On the other hand, when the link mechanism 92 is contracted by the air cylinder 93, the reverse rotation roller 91 moves to a position (hereinafter referred to as "retracted position") in the yarn joining cart 3 as shown in FIG. With the reverse rotation roller 91 in the contact position, the lower yarn Y can be pulled out from the package P by rotating the reverse rotation roller 91 in the direction opposite to the winding drum 42. In the present embodiment, the reverse rotation roller 91 can be driven not only in the reverse direction to the winding drum 42 but also in the same direction as the winding drum 42.

(Details of yarn joining device)
Next, details of the yarn joining device 50 will be described. FIG. 8 is a perspective view of the yarn joining device 50. The yarn joining device 50 mainly includes a yarn joining portion 51, a stepping motor 52, a frame 53, a yarn shifting lever 54, and an air cylinder 55. In FIG. 8, illustration of some members constituting the yarn joining portion 51 is omitted in order to avoid the drawing from being complicated. In the following description, the direction words defined in FIG. 8 are used as appropriate.

  The yarn joining portion 51 is a portion that joins the upper yarn Y guided by the suction pipe 71 and the lower yarn Y guided by the suction mouth 72. A specific configuration of the yarn joining portion 51 includes a knotter that ties the upper yarn Y and the lower yarn Y by a plurality of members moving mechanically interlockingly, and the upper yarn Y and the lower yarn by swirling air flow. There is a splicer that twists Y yarn ends together to form a seam. In this embodiment, a knotter is adopted as the yarn joining portion 51, and a stepping motor 52 is provided as a drive source for the yarn joining portion 51. The stepping motor 52 is controlled by the cart control unit 3a.

  The frame 53 is a structure that detachably supports the yarn joining portion 51, and is fixed to the support bracket 82 of the advance / retreat mechanism 80. Further, as described above, there are two types of the yarn splicing part 51: a knotter and a splicer. It is configured to be possible.

  The yarn shifting lever 54 as a yarn path regulating member is a lever-like member that is rotatably attached to the frame 53, and is provided in two in the vertical direction. The yarn shifting lever 54 is driven by an air cylinder 55 as a driving source, and thereby rotates about a shaft 54a extending in the vertical direction. The air cylinder 55 is controlled by the carriage control unit 3a. Normally, the yarn shifting lever 54 is in a position where it does not come into contact with the yarn Y (the position shown in FIG. 8; hereinafter referred to as “standby position”). When the air cylinder 55 is driven, the yarn holding lever 54 in the standby position rotates so that the tip end portion enters the back side of the yarn joining portion 51 (see the arrow in FIG. 8). As a result, the yarn shifting lever 54 comes into contact with the upper yarn Y and the lower yarn Y guided by the yarn joining portion 51, and further pushes the upper yarn Y and the lower yarn Y into the back side of the yarn joining portion 51 so as to pass the yarn path. Can be moved to a position (hereinafter referred to as “restricted position”).

  The yarn joining portion 51 will be described in detail. 9 and 10 are front views showing a series of operations of the yarn joining section 51. FIG. The yarn splicing part (notter) 51 has a structure in which the front side is opened, and the upper yarn Y guided from the front side by the suction pipe 71 and the lower yarn Y guided from the front side by the suction mouth 72 are spliced. (Yarn knot). The yarn joining section 51 includes two guide plates 63 and 64, two knotter buildings 65, one crosser 66, two extractors 67, two clamps 68, and a housing 69.

  The upper guide plate 63 constitutes the upper surface of the housing 69, and the lower guide plate 64 constitutes the lower surface of the housing 69. As shown in FIG. 8, the upper guide plate 63 is formed with a first slit 63 a and a second slit 63 b that are open toward the front side of the yarn joining portion 51, arranged side by side in the left-right direction. The lower guide plate 64 is formed with a first slit 64 a and a second slit 64 b that are open toward the front side of the yarn splicing portion 51, arranged side by side in the left-right direction. The first slit 63a and the second slit 64b are deeper than the second slit 63b and the first slit 64a.

  When tying the yarn, the upper thread Y sucked and held by the suction pipe 71 is guided to the first slits 63a and 64a of the two guide plates 63 and 64, and the lower thread sucked and held by the suction mouth 72. Y is guided to the second slits 63b and 64b of the two guide plates 63 and 64 (see FIG. 9B). In this way, after the upper thread Y is guided to the first slits 63a and 64a and the lower thread Y is guided to the second slits 63b and 64b, the above-described thread-feed lever 54 is moved to the restriction position, whereby the upper thread Y Y is pushed into the back side of the first slit 63a of the upper guide plate 63, and the lower thread Y is pushed into the back side of the second slit 64b of the lower guide plate 64 to clamp the upper thread Y and the lower thread Y. The position can be regulated by 68.

  One of the two knotter buildings 65 is provided so as to protrude from the center of the right wall surface of the housing 69 to the left, and the other is provided so as to protrude from the center of the left wall of the housing 69 to the right. ing. The knotter building 65 is an L-shaped member, and is configured to be rotatable around a shaft portion 65 a protruding in the left-right direction from the wall surface of the housing 69. A clamp cutter 65b, which is a thread holding member, is formed at the tip of the knotter bill 65, and the clamp cutter 65b performs one opening / closing operation while the knotter bill 65 rotates once. The knotter bill 65 can hold and cut the yarn Y in the predetermined region R (see FIG. 9D), which is the rotation trajectory, when the clamp cutter 65b is changed from the open state to the closed state. Note that the two knotter buildings 65 rotate in opposite directions.

  The crosser 66 has a shape in which a part of the disk is cut out, and is configured to be rotatable around a central axis extending in the front-rear direction (clockwise or counterclockwise in FIGS. 9 and 10). Yes. At two positions (two positions that are 180 degrees apart in the circumferential direction) facing each other among the peripheral portions of the crosser 66, hook portions 66a that protrude to the front side are formed. As a result, when the crosser 66 rotates, the yarn Y can be hooked on the hook 66a and pulled.

  The two extractors 67 are provided side by side in the left-right direction. The extractor 67 is a member that is long in the vertical direction, and a push-up portion 67a that can engage with the yarn Y and push the yarn Y forward is formed at the center thereof. The right extractor 67 is swingably supported on the upper end portion of the right wall surface of the housing 69, and the push-up portion 67a moves in the front-rear direction by swinging in the front-rear direction using the base end portion as a fulcrum. It is possible. The left extractor 67 is swingably supported at the lower end portion of the left wall surface of the casing 69, and the push-up portion 67a is moved in the front-rear direction by swinging in the front-rear direction with the base end portion as a fulcrum. It is possible to move to. The knots of the yarn Y can be squeezed by simultaneously swinging the two extractors 67 forward.

  Of the two clamps 68, one is provided adjacent to the lower side of the first slit 63 a of the upper guide plate 63, and the other is adjacent to the upper side of the second slit 63 b of the lower guide plate 63. Is provided. Thus, the upper clamp 68 can grip the upper thread Y passing through the first slit 63a, and the lower clamp 68 can grip the lower thread Y passing through the second slit 63b. (See FIG. 9C, etc.).

  The knotter bill 65, the crosser 66, the extractor 67, and the clamp 68 constitute a yarn knot member, and each operate in conjunction with a timing defined on the cam surface by a cylindrical cam as a cam mechanism (not shown). It is configured as follows. These members 65 to 68 perform a one-cycle operation that starts from the origin position and returns to the origin position by the cam mechanism, so that the knotter bill 65, the crosser 66, and the extractor 67 cooperate to tie the yarn knot. Do. The cam mechanism described above is driven by the stepping motor 52, and rotation and stop are controlled by the cart control unit 3a.

(Thread tying operation)
A series of operations of the yarn joining portion (knotter) 51 will be described with reference to FIGS. 9 and 10. This series of operations is defined by the cam surface of the cylindrical cam. FIG. 9A shows a state where the knotter bill 65, the crosser 66, the extractor 67, and the clamp 68 are at the origin positions. At this time, the knotter bill 65 is closed with the clamp cutter 65b facing the front side. The clamp 68 is open.

  From the state shown in FIG. 9 (a), the upper thread Y is guided to the first slits 63 a and 64 a of the two guide plates 63 and 64 by the suction pipe 71, and the lower thread Y is guided to the two guide plates by the suction mouth 72. When guided by the second slits 63b, 64b of 63, 64, as shown in FIG. 9 (b), the respective thread paths of the upper thread Y and the lower thread Y are substantially vertical in the yarn joining portion 51. Parallel. Thereafter, the upper thread Y is moved closer to the inner side of the first slit 63a and the lower thread Y is moved closer to the inner side of the second slit 64b by moving the yarn shifting lever 54 to the restriction position. As a result, the upper thread Y and the lower thread Y are moved to positions where they can be gripped by the clamp 68.

  Subsequently, when the stepping motor 52 is operated to operate the cam mechanism, first, the clamp 68 is closed and the upper thread Y and the lower thread Y are gripped. Then, the knotter bill 65 starts to rotate and the crosser 66 starts to rotate counterclockwise. As a result, as shown in FIG. 9 (c), the yarn Y is locked to the knotter bill 65, and is pulled and bent by the hook portion 66 a of the crosser 66, thereby forming a ring with the two yarns Y.

  Thereafter, the rotation of the crosser 66 is temporarily stopped, but the knotter bill 65 continues to rotate, and the clamp cutter 65b is opened as shown in FIG. 9 (d). At this time, both the upper thread Y and the lower thread Y are in a predetermined region R that can be cut and held by the knotter bill 65. When the knotter bill 65 further rotates, the clamp cutter 65b is closed, and the yarn Y is cut and held by the knotter bill 65 as shown in FIG. And the knot is formed because the yarn Y is pulled along with the rotation of the knotter bill 65. When the knot is formed, the extractor 67 swings forward, and the upper thread Y and the lower thread Y are pushed forward by the push-up portion 67a. In this process, the holding of the yarn Y by the knotter bill 65 is released. Thereby, as shown in FIG. 10B, the knot is drawn and the yarn knot is completed.

  When the yarn tying is completed, the crosser 66 rotates clockwise and the extractor 67 swinging forward returns to the rear side. Further, the clamp 68 is opened and the gripping of the yarn Y is released. By these operations, the tension applied to the bent yarn Y is loosened all at once, and the yarn Y is loosened in the yarn joining portion 51 as shown in FIG. When the yarn Y is loosened, the yarn Y may enter the predetermined region R. At this time, the clamp cutter 65b has moved to the second opening / closing operation, and the clamp cutter 65b is in an open state. Therefore, if the slack yarn Y is in the predetermined region R, the clamp cutter 65b is in a closed state. When returning, the thread Y may be caught, and the thread Y may be caught on the knotter bill 65. If winding is started in a state where the yarn Y is caught on the knotter bill 65, a problem such as breakage of the knotter bill 65 may occur. Further, there is a problem that when the yarn joining cart 3 moves, yarn drawing occurs.

  Due to the configuration of the cam mechanism that drives the yarn joining portion 51, the knotter bill 65 rotates twice while each member 65 to 68 constituting the yarn joining portion 51 starts an operation from the origin position and returns to the origin position. As described above, the first opening / closing operation cuts and holds the yarn Y, and is an indispensable operation for the yarn knot. However, the first opening / closing operation is particularly suitable for the second opening / closing operation after the yarn knot is completed. There is no meaning. Rather, the second opening / closing operation causes the slack yarn Y to be hooked as described above. However, since the members 65 to 68 are configured to be interlocked by the cam mechanism, the second opening / closing operation is performed. It cannot be omitted.

  Therefore, in this embodiment, after the yarn knot is completed, the operation of the yarn joining portion 51 is temporarily stopped (the stepping motor 52 is stopped), and as shown in FIG. By applying the yarn, the yarn Y after the yarn tying is taken out of the predetermined region R. Then, after the yarn Y goes out of the predetermined region R, the operation of the yarn joining portion 51 is resumed (the stepping motor 52 is restarted), and the knotter bill 65 is returned to the origin position, whereby the knotter bill 65 after the yarn is tied The yarn Y is prevented from being caught. Specifically, as will be described later, during the temporary stop of the yarn joining portion 51, winding of the yarn Y is started, so that tension is applied to the yarn Y so as to be out of the predetermined region R. .

(Other features of the yarn splicing device)
As shown in FIG. 8, the yarn joining device 50 of the present embodiment suppresses the influence of the slack of the yarn Y generated at the yarn joining portion 51 as described above, and the guide bracket 56, the slack propagation suppressing member 57, and the air, as shown in FIG. An injection device 58 and a receiving member 59 are further provided. The guide bracket 56 is configured as a plate-like member substantially parallel to a horizontal plane, and is fixed to the frame 53 above (upstream side) the yarn joining portion 51. A slack propagation suppressing member 57 is fixed to the upper surface of the guide bracket 56 in a state slightly spaced upward from the guide bracket 56. An air injection device 58 and a receiving member 59 are fixed to the lower surface of the guide bracket 56.

  11 is a view of the slack propagation suppressing member 57 and the like viewed from above, and FIG. 12 is a cross-sectional view taken along the XII-XII cross section of FIG. As shown in FIG. 11, the guide bracket 56 is formed with a slit 56 a opened to the front side. On the other hand, the slack propagation suppressing member 57 is configured as a plate-like member substantially parallel to the horizontal plane, and the right edge thereof is a yarn hooking surface 57a on which the yarn Y is hung at the time of yarn joining. The slack propagation suppressing member 57 is disposed so as to cover the slit 56a of the guide bracket 56 when viewed from above. As a result, the yarn hooking surface 57a of the slack propagation suppressing member 57 is arranged at a position that does not face the slit 56a when viewed from the yarn traveling direction.

  At the time of winding the yarn Y, the yarn Y is located at the winding position P1 shown in FIG. 11, but when the yarn joining is performed at the yarn joining portion 51, the upper yarn Y is the yarn joining position P2 shown in FIG. Located in. Specifically, when the yarn shifting lever 54 rotates to the restriction position, the upper thread Y is moved to the back side of the first slit 63a of the guide plate 63 and the slit 56a of the guide bracket 56, and in this state, The upper thread Y is gripped by the clamp 68 of the yarn joining portion 51. As a result, as shown in FIG. 12, a thread path is formed so that the upper thread Y passes between the first slit 63a of the upper guide plate 63 and the slit 56a of the guide bracket 56 during the yarn knot. The

  Here, as shown in FIG. 11, the front end portion of the slack propagation suppressing member 57 has a circular arc shape convex to the front side. Therefore, when the yarn shifting lever 54 rotates to the restriction position, the upper thread Y first contacts the front end portion of the slack propagation suppressing member 57 covering the slit 56a, but moves rearward along the arc-shaped front end portion. Is smoothly guided to finally reach the slit 56a.

  If the slack propagation suppressing member 57 does not exist, the yarn path of the yarn Y on the upstream side of the yarn joining portion 51 is generally along the vertical direction as indicated by a broken line in FIG. In this embodiment, the slack propagation suppressing member 57, which is a plate-like member, is arranged so as to cross the above-described yarn path and further to be substantially vertical. For this reason, the yarn Y on the upstream side of the guide bracket 56 is largely bent by contacting the edge of the slack propagation suppressing member 57 as shown in FIG. Accordingly, it is possible to suppress the slackness of the yarn Y generated at the yarn joining portion 51 from being transmitted to the upstream side beyond the slack propagation suppressing member 57.

  For example, when the slack of the yarn Y propagates to the yarn accumulating device 30, the balloon A (see FIG. 4) formed on the downstream side of the accumulating roller 31 swells greatly, so that the yarn Y is entangled with the yarn hooking member 32. Cutting may occur. In particular, when the yarn Y is thick, the centrifugal force acting on the balloon A is likely to increase, so that such a problem is likely to become remarkable. However, by providing the slack propagation suppressing member 57, the slack of the yarn Y can be prevented from propagating to the yarn accumulating device 30, and the above-described problems can be solved.

  In this embodiment, in addition to the slack propagation suppressing member 57 for suppressing the propagation of the slack of the yarn Y, an air injection device 58 is further provided to remove the slack of the yarn Y itself. As shown in FIG. 12, the air injection device 58 is configured to be able to inject compressed air toward the yarn Y passing between the first slit 63a of the upper guide plate 63 and the slit 56a of the guide bracket 56. ing. The slack of the yarn Y can be removed by blowing and pushing the yarn Y with the compressed air ejected from the air ejection device 58. Further, in the present embodiment, the air ejecting device 58 is arranged so that air can be ejected in the direction (see the arrow in FIG. 12) that increases the bending angle of the yarn Y that is in contact with the edge of the slack propagation suppressing member 57. ing. Thereby, the effect of suppressing the propagation of the slack of the yarn Y by the slack propagation suppressing member 57 can be increased. Note that the air injection device 58 is controlled by the carriage control unit 3a.

  The receiving member 59 is provided at substantially the same position as the air injection device 58 in the vertical direction, and the upper thread Y passes between the air injection device 58 and the receiving member 59. The receiving member 59 is configured as a plate-like member having a receiving surface 59a facing an injection port (not shown) of the air injection device 58, and is provided so that the receiving surface 59a is substantially parallel to the vertical direction. Yes. As a result, the compressed air injected from the air injection device 58 is received by the receiving member 59, and the yarn Y can be blown and pushed using the resulting air flow. Can do.

  Furthermore, as shown in FIG. 8, the yarn joining device 50 according to the present embodiment includes origin detecting means 60 that can detect whether or not the members 65 to 68 of the yarn joining portion 51 are at the origin. . A disk-like interlocking member 61 that is rotatable around an axis substantially parallel to the left-right direction is provided outside the left side of the housing 69 of the yarn joining portion 51. The interlocking member 61 is connected to the above-described cam mechanism that interlocks the members 65 to 68 of the yarn joining portion 51. When the cam mechanism is driven by the stepping motor 52, the interlocking member 61 is interlocked with the members 65 to 68. Accordingly, the interlocking member 61 also rotates synchronously. The interlocking member 61 is configured to rotate once while each member 65 to 68 performs one cycle of operation starting from the origin position and returning to the origin position.

  A magnet 61a is provided on the peripheral edge of the interlocking member 61. When the interlocking member 61 rotates, the magnet 61a also rotates. The interlocking member 61 is connected to the cam mechanism so that the magnet 61a is at the lowest position when the members 65 to 68 of the yarn joining portion 51 are at the origin position. A magnetic sensor 62 is provided at a position facing the magnet 61a when the magnet 61a is at the lowest position. Accordingly, when the magnet 61a is at the lowest position, that is, when the members 65 to 68 are at the origin position, the magnetic sensor 62 can detect the magnetism emitted from the magnet 61a. The magnetic sensor 62 is fixed to the frame 53 of the yarn joining device 50, and transmits a detection signal to the carriage control unit 3a.

  Immediately after attaching the yarn joining portion 51 to the frame 53, etc., when the members 65 to 68 of the yarn joining portion 51 are not at the origin position, that is, when the magnetic sensor 62 has not detected the magnetism from the magnet 61a. The cart control unit 3a drives the stepping motor 52 to return the members 65 to 68 to the original positions. Thereby, each member 65-68 operates, and the interlocking member 61 rotates. And when each member 65-68 returns to an origin position, ie, when the magnet 61a comes to the lowest position, the magnetism from the magnet 61a will be detected by the magnetic sensor 62. FIG. The cart controller 3 a that has received the detection signal from the magnetic sensor 62 stops the stepping motor 52. Thus, when the members 65 to 68 of the yarn joining portion 51 are not at the origin position, the members 65 to 68 can be automatically returned to the origin position.

(Sequential flow of yarn splicing)
Finally, a series of flow of yarn joining (yarn knotting) by the yarn joining cart 3 will be described. In a spinning unit 2, when the yarn Y between the spinning device 20 and the winding device 40 is in a divided state, the unit control unit 2a of the spinning unit 2 drives the cradle arm 41 to swing, thereby winding the winding drum. The package P is separated from 42.

  Subsequently, the unit control unit 2 a transmits a control signal to the cart control unit 3 a of the yarn splicing cart 3. The yarn splicing carriage 3 that has received the control signal moves to the target spinning unit 2 and stops. While the yarn joining cart 3 travels between the spinning units 2, the yarn joining device 50 is retracted to the retracted position by the advance / retreat mechanism 80. Accordingly, it is possible to prevent the yarn joining device 50 from coming into contact with the yarn Y traveling through each spinning unit 2 when the yarn joining cart 3 is traveling.

  FIG. 13 is a timing chart showing the operation of each member during yarn splicing, and FIG. 14 is a schematic diagram showing the suction state of the yarn Y in the suction path. When the yarn splicing cart 3 stops at the target spinning unit 2, the cart control unit 3a operates a brake mechanism (not shown) provided on the yarn splicing cart 3 to stop the rotation of the package P. Then, the reverse rotation roller 91 is advanced to the contact position, and the reverse rotation roller 91 is rotationally driven in the direction opposite to the winding drum 42 to rotate the package P in the drawing direction.

  Subsequently, the suction mouse 72 is rotated downward, and the lower thread Y drawn from the package P by the suction mouse 72 is sucked and held (see FIG. 3). At the timing when the lower thread Y is sucked and held, the driving of the reverse rotation roller 91 is stopped to stop the rotation of the package P, and the suction mouse 72 is rotated upward to guide the lower thread Y to the yarn joining device 50. (See FIG. 4). At this time, as shown in FIG. 14A, the lower thread Y reaches the suction duct 8 via the lower thread suction pipe 76 and the upper thread suction pipe 75.

  Next, the cart control unit 3 a operates a shutter cutter 77 provided in the upper thread suction pipe 75. Accordingly, as shown in FIG. 14B, the yarn end of the lower yarn Y is cut, and the suction length of the lower yarn Y can be shortened. For this reason, it is possible to suppress the suction force acting on the lower thread Y from becoming excessive, and to suck and hold the lower thread Y with an appropriate suction force. However, since a part of the lower thread Y exists in the upper thread suction pipe 75 even after cutting, if the upper thread Y is sucked as it is, the upper thread Y and the lower thread Y in the upper thread suction pipe 75 When the lower thread Y is pulled by the upper thread Y, the lower thread Y may be broken.

  Therefore, before guiding the upper thread Y to the yarn splicing device 50 by the suction pipe 71, the carriage control unit 3a winds the package P by slightly rotating the reverse rotation roller 91 in the same direction as the winding drum 42. As shown in FIG. 14C, the yarn end of the lower thread Y is pulled out from the upper thread suction pipe 75 to the lower thread suction pipe 76. That is, the yarn end of the lower yarn Y is positioned upstream of the middle portion where the lower yarn suction tube 76 joins the upper yarn suction tube 75 so that the lower yarn Y is not located in the upper yarn suction tube 75. . After pulling the yarn end of the lower yarn Y from the upper yarn suction pipe 75, if the reverse rotation roller 91 is stopped, the lower yarn Y will not be drawn from the package P. The upper thread suction pipe 75 is not entered.

  Subsequently, the carriage control unit 3a rotates the suction pipe 71 upward, sucks and holds the upper yarn Y spun from the spinning device 20 by the suction pipe 71 (see FIG. 3), and then lowers the suction pipe 71. The upper thread Y is guided to the yarn splicing device 50 by turning the side (see FIG. 4). At this time, as shown in FIG. 14 (d), the upper thread Y reaches the suction duct 8 via the upper thread suction pipe 75, but the lower thread Y exists in the upper thread suction pipe 75 as described above. Therefore, the upper thread Y and the lower thread Y are not entangled. After guiding the upper thread Y to the yarn joining device 50, the carriage control unit 3a operates the shutter cutter 77 again to cut the yarn end of the upper thread Y. As a result, the suction length of the upper thread Y can be prevented from becoming too long, and the upper thread Y can be sucked and held with an appropriate suction force.

  As described above, in this embodiment, the upper yarn Y is cut by cutting both the yarn end of the upper yarn Y and the yarn end of the lower yarn Y before the operation of the yarn shifting lever 54 and the yarn joining portion (notter) 51 starts. And the lower thread Y can be sucked and held with an appropriate suction force, and the tension of the upper thread Y and the lower thread Y can be prevented from becoming excessive. Therefore, even if the tensions of the upper thread Y and the lower thread Y increase during the subsequent splicing, it is possible to suppress the occurrence of thread breakage. Since the upper yarn Y is continuously spun from the spinning device 20, the suction length of the upper yarn Y becomes longer and longer. Therefore, it is effective to cut the yarn end of the upper yarn Y as much as possible immediately before the operation of the yarn shifting lever 54 and the yarn joining portion (knotter) 51 is started.

  At substantially the same time as the second operation of the shutter cutter 77, the carriage control unit 3a moves the yarn joining device 50 to the yarn joining position by the advance / retreat mechanism 80. When the yarn joining device 50 advances to the yarn joining position, the upper yarn Y guided by the suction pipe 71 and the lower yarn Y guided by the suction mouse 72 are converted into the yarn joining device 50 (yarn joining portion 51). ). During the yarn joining, the yarn joining device 50 is maintained at the yarn joining position.

  When the yarn joining device 50 advances to the yarn joining position, the carriage control unit 3a rotates the yarn gathering lever 54 to the restriction position. As a result, the upper thread Y is brought close to the back side of the first slit 63a, and the upper thread 68 can be gripped by the upper clamp 68, and the lower thread Y is brought close to the back side of the second slit 64b. The thread path is regulated so that the lower thread Y can be gripped by the clamp 68. At this time, the upper thread Y is pushed into the back side of the slit 56a of the guide bracket 56 by the thread shifting lever 54 and moves to the yarn joining position P2 (see FIG. 11). As a result, as shown in FIG. 12, the upper yarn Y is bent in contact with the edge of the slack propagation suppressing member 57, and the slack of the yarn Y generated at the yarn joining portion 51 propagates upstream of the slack propagation suppressing member 57. Can be suppressed. The yarn shifting lever 54 is returned to the standby position after the yarn joining portion 51 starts operating and the yarn Y is gripped by the clamp 68 of the yarn joining portion 51.

  The carriage control unit 3a starts jetting compressed air by the air jetting device 58 substantially simultaneously with turning the yarn moving lever 54. As a result, the slackness of the yarn Y generated at the yarn joining portion 51 during the subsequent yarn joining is removed by being blown against the compressed air.

  Subsequently, the carriage control unit 3 a drives the stepping motor 52 and starts the yarn knotting by the yarn joining unit (knotter) 51. As described above, the knotter building 65, the crosser 66, and the extractor 67 cooperate during one cycle in which the members 65 to 68 constituting the yarn joining portion 51 start from the origin position and return to the origin position. Yarn tying is performed, but the yarn tying itself is completed in the middle of one cycle. In this embodiment, the stepping motor 52 is turned on after the completion of the yarn knot in order to prevent the yarn knot from being hooked by the second opening / closing operation of the knotter bill 65 after the yarn knot is completed. Stop temporarily. Thereby, the operation of the knotter bill 65 is temporarily stopped, and the slack yarn Y is moved out of the predetermined region R during the operation.

  Specifically, when the stepping motor 52 is temporarily stopped, the carriage control unit 3a returns the yarn joining device 50 to the standby position by the advance / retreat mechanism 80. Further, the unit controller 2a swings the cradle arm 41 so that the outer peripheral surface of the package P is brought into contact with the rotating take-up drum 42. As a result, the stopped package P starts to rotate in the winding direction, and the winding of the yarn Y is started (resumed).

  When winding of the yarn Y is started, as shown in FIG. 10D, sufficient tension is applied to the yarn Y to eliminate the slack, and the yarn Y goes out of the predetermined region R. Therefore, even if the knotter bill 65 is subsequently closed, the yarn Y is not caught between the knotter bills 65. When the winding of the yarn Y is started, the yarn Y moves from the yarn joining position P2 to the winding position P1 (see FIG. 11). Accordingly, it is possible to prevent the yarn Y from coming into contact with the slack propagation suppressing member 57 during winding.

  Moreover, in this embodiment, since the compressed air is injected by the air injection device 58 immediately before starting the yarn knotting, the slackness of the yarn Y can be continuously removed. However, since the slack of the yarn Y is eliminated after the winding of the yarn Y is started and the injection of compressed air is no longer necessary, the cart control unit 3a causes the air injection device 58 to inject the compressed air when the winding starts. Stop.

  The winding of the yarn Y is started from the state where the yarn Y is slackened in the yarn joining portion 51 shown in FIG. 10C, and when the tension acts on the yarn Y, the yarn Y is It may be caught by each member 65-67, and the thread | yarn Y cannot be moved out of the predetermined area | region R. In preparation for such a case, in this embodiment, after starting to wind the yarn Y, the yarn shifting lever 54 is temporarily moved to the restriction position. As a result, the yarn Y is restricted to a regular yarn path to release the catch, and the yarn Y can be reliably moved out of the predetermined region R. Finally, the carriage control unit 3a restarts the stepping motor 52, restarts the operation of the yarn joining unit 51 that has been temporarily stopped in the middle of one cycle, and sets the members 65 to 68 of the yarn joining unit 51 to the origin positions. Return to

[effect]
In this embodiment, since the shutter cutter 77 (cutting member) for cutting the yarn end of the upper thread Y sucked by the suction pipe 71 (upper thread suction member) is provided, the tension of the upper thread Y is excessive. It is possible to prevent the upper yarn Y from being broken at the time of yarn knotting.

  Further, in this embodiment, since the shutter cutter 77 (lower thread cutting member) for cutting the thread end of the lower thread Y sucked by the suction mouse 72 (lower thread suction member) is further provided, the lower thread Y It is possible to prevent the tension of the lower thread Y from becoming excessive and to prevent the lower thread Y from breaking when the yarn is tied.

  In this embodiment, the lower thread suction pipe 76 is joined and connected to the middle part of the upper thread suction pipe 75, and the shutter cutter 77 provided on the upper thread suction pipe 75 serves as a cutting member and a lower thread cutting member. It is also used. This is advantageous from the viewpoint of cost and space because only one shutter cutter 77 is required.

  In this embodiment, the lower end of the lower yarn Y is cut by the shutter cutter 77 and then the upper end of the upper yarn Y is cut by the shutter cutter 77. The lower yarn Y is sucked only by the amount drawn from the package P, while the upper yarn Y is sucked by the amount spun from the spinning device 20 endlessly. Therefore, even if the yarn end of the upper yarn Y is cut quickly, the length that is sucked after the cutting gradually increases, and the tension of the upper yarn Y may not be reduced. Therefore, as described above, by cutting the yarn end of the upper yarn Y after the yarn end of the lower yarn Y, an increase in the tension of the upper yarn Y can be effectively suppressed.

  In this embodiment, the lower yarn Y is wound around the package P after the yarn end of the lower yarn Y is cut by the shutter cutter 77 and before the yarn end of the upper yarn Y is sucked by the suction pipe 71. Thus, the lower thread Y remaining in the upper thread suction pipe 75 is pulled out to the suction mouth 72 side from the middle part. Even if the thread end of the lower thread Y is cut by the shutter cutter 77 in the upper thread suction pipe 75, a part of the lower thread Y remains in the upper thread suction pipe 75, and this is later suctioned. There is a risk of entanglement with the yarn Y. Therefore, as described above, after the lower end of the lower thread Y is cut and before the upper end of the upper thread Y is sucked, the lower end of the lower thread Y is pulled to the suction mouth 72 side from the middle portion. It is possible to prevent the upper thread Y and the lower thread Y from being entangled by the upper thread suction pipe 75.

  In the present embodiment, the yarn end of the upper yarn Y is cut by the shutter cutter 77 and the yarn end of the lower yarn Y is cut by the shutter cutter 77 before the yarn joining by the yarn joining device 50 is started. Yes. When tying the yarn, the upper yarn Y and the lower yarn Y are pulled to increase the tension, and yarn breakage is likely to occur. Therefore, as described above, the yarn end of the upper yarn Y and the yarn end of the lower yarn Y are cut before the yarn knot is started, so that the yarn breakage at the time of the yarn knot can be effectively suppressed. it can.

  In the present embodiment, the yarn joining device 50 is movable between a standby position where the yarn joining device 50 does not contact the yarn Y and a regulation position where the yarn path in the yarn joining device 50 is regulated by contacting the yarn Y. A weft lever 54 (yarn path regulating member) is further provided, and before the yarn joining by the yarn joining device 50 is started, the yarn gathering lever 54 is moved to the restriction position, and before the yarn gathering lever 54 is moved to the restriction position. The upper end of the upper thread Y is cut by the shutter cutter 77 and the lower end of the lower thread Y is cut by the shutter cutter 77. Before starting the yarn knotting, the yarn shifting lever 54 comes into contact with the upper yarn Y and the lower yarn Y and regulates the yarn path, whereby the tension of the upper yarn Y and the lower yarn Y increases. Therefore, as described above, the yarn breakage can be suppressed by cutting the upper yarn Y and the lower yarn Y in advance and lowering the tension before moving the yarn shifting lever 54 to the restriction position.

  In the present embodiment, the yarn joining device 50 further includes an air injection device 58 that injects air onto the yarn Y, and before the air injection by the air injection device 58 is started, the shutter cutter 77 releases the upper yarn Y. While cutting the yarn end, the yarn end of the lower yarn Y is cut by the shutter cutter 77. The slack of the yarn Y can be removed by injecting air onto the yarn Y and blowing the yarn Y, but at that time, the tension of the yarn Y increases. Therefore, as described above, the yarn breakage can be suppressed by cutting the yarn end of the upper yarn Y and the yarn end of the lower yarn Y in advance and lowering the tension before starting the air injection.

  In the present embodiment, the yarn joining cart 3 includes a plurality of spinning units 2 having the spinning device 20 and the winding device 40, and a yarn joining cart 3 that can move between the plurality of spinning units 2. A yarn splicing device 50, a suction pipe 71, an upper thread suction pipe 75, and a shutter cutter 77 are provided. Therefore, the yarn breakage of the upper thread Y can be prevented when the yarn joining cart 3 performs the yarn knotting. Further, by providing the yarn joining device 3 with the yarn joining device 50, the suction pipe 71, the upper yarn suction pipe 75 and the shutter cutter 77, it is not necessary to provide these devices and members for each spinning unit 2.

[Other Embodiments]
The embodiment of the present invention has been described above. However, the form to which the present invention can be applied is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention, as exemplified below. It is possible to add.

  In the above embodiment, the shutter cutter 77 provided in the upper thread suction pipe 75 serves as both a cutting member that cuts the thread end of the upper thread Y and a lower thread cutting member that cuts the thread end of the lower thread Y. . However, the cutting member and the lower thread cutting member may be prepared separately, the cutting member may be provided in the upper thread suction pipe 75, and the lower thread cutting member may be provided in the lower thread suction pipe 76. In this case, since the lower thread Y that is cut first does not remain in the upper thread suction pipe 75, the upper thread can be obtained without winding the lower thread Y around the package after cutting the thread end of the lower thread Y. It is possible to avoid the tangling of Y and the lower thread Y.

  Further, in the above embodiment, the yarn end of the lower yarn Y is cut first by the shutter cutter 77, and then the yarn end of the upper yarn Y is cut. However, it is possible to cut the yarn end of the lower yarn Y after cutting the yarn end of the upper yarn Y, or the yarn end of the upper yarn Y and the yarn end of the lower yarn Y can be cut simultaneously. is there.

  Further, in the above embodiment, the lower thread Y remaining in the upper thread suction pipe 75 is pulled out after the lower end of the lower thread Y is cut. However, when the entanglement between the upper thread Y and the lower thread Y does not matter so much, a part of the lower thread Y may remain in the upper thread suction pipe 75.

  In the above embodiment, the lower thread suction pipe 76 is joined and connected to the middle part of the upper thread suction pipe 75, but the lower thread suction pipe 76 is not joined to the upper thread suction pipe 75. May be.

  In the above embodiment, the shutter cutter 77 is provided as the cutting member. However, the specific configuration of the cutting member may be other than the shutter cutter.

  In the above embodiment, the yarn joining device 50 is provided in the yarn joining cart 3, but the yarn joining device 50 may be provided in each spinning unit 2.

1: Spinning machine 2: Spinning unit 3: Yarn splicing cart 20: Spinning device 40: Winding device 50: Yarn splicing device 51: Yarn splicing unit (notter)
54: Yarn feeding lever (yarn path regulating member)
58: Air injection device 71: Suction pipe (upper thread suction member)
72: Suction mouse (lower thread suction member)
75: Upper thread suction pipe 76: Lower thread suction pipe 77: Shutter cutter (cutting member, lower thread cutting member)
Y: Yarn (upper thread, lower thread)
P: Package

Claims (9)

A spinning device that produces yarn by spinning;
A winding device for winding a yarn generated by the spinning device to form a package;
When the yarn is divided between the spinning device and the winding device, a yarn splicing that connects and joins the yarn end of the upper yarn on the spinning device side and the yarn end of the lower yarn on the winding device side. Equipment,
A spinning machine comprising:
An upper thread suction member that sucks and holds the yarn end of the upper thread and guides it to the yarn joining device;
An upper thread suction pipe connected to the upper thread suction member and pulling the thread end of the suctioned upper thread into the pipe;
A cutting member for cutting the yarn end of the upper thread in the upper thread suction pipe;
A spinning machine characterized by comprising: The spinning machine according to claim 1,
A lower thread suction member that sucks and holds the yarn end of the lower thread and guides it to the yarn joining device;
A lower thread suction pipe that is connected to the lower thread suction member and draws the thread end of the sucked lower thread into the pipe;
A lower thread cutting member for cutting a thread end of the lower thread in the lower thread suction pipe;
A spinning machine characterized by further comprising: The spinning machine according to claim 2, wherein
The lower thread suction pipe is joined and connected to the middle part of the upper thread suction pipe,
A spinning machine characterized in that the cutting member is also used as the lower thread cutting member. The spinning machine according to claim 3, wherein
A spinning machine characterized in that after cutting the lower yarn end, the upper yarn end is cut. The spinning machine according to claim 4, wherein
After the lower thread end is cut and before the upper thread suction member sucks the upper thread end, the lower thread is wound around the package to remain in the upper thread suction pipe. The spinning machine is characterized in that the lower thread is pulled out to the lower thread suction member side from the middle part. The spinning machine according to any one of claims 2 to 5,
A spinning machine characterized in that the yarn end of the upper yarn and the yarn end of the lower yarn are cut before the yarn joining by the yarn joining device is started. The spinning machine according to claim 6,
The yarn joining device further includes a yarn path regulating member that is movable between a standby position that does not contact the yarn and a regulation position that regulates the yarn path in the yarn joining device by contacting the yarn,
Before the yarn joining by the yarn joining device is started, the yarn path regulating member moves to the regulating position,
A spinning machine characterized in that the yarn end of the upper yarn and the yarn end of the lower yarn are cut before the yarn path regulating member moves to the regulation position. The spinning machine according to any one of claims 2 to 7,
The yarn joining device further includes an air injection device that injects air to the yarn,
A spinning machine that cuts the yarn end of the upper yarn and the yarn end of the lower yarn before the air injection by the air injection device is started. The spinning machine according to any one of claims 1 to 8,
A plurality of spinning units having the spinning device and the winding device;
A yarn splicing carriage movable between the plurality of spinning units;
With
A spinning machine, wherein the yarn joining cart is provided with the yarn joining device, the upper yarn suction member, the upper yarn suction pipe, and the cutting member.

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