Yarn winding machine

Abstract

The invention provides a yarn winding machine, which suppresses the prolonging of the time from the breaking of a yarn to the completion of yarn splicing as much as possible, and suppresses the passing of a yarn end on a package side through a gap generated between a slack yarn layer and the surface of the package. A unit control unit (15) of a yarn winding unit (2) performs first control, second control, and third control when a yarn (Y) is broken between a yarn supply unit (11) and a winding unit (13). The first control is a control for causing the lifting mechanism to perform a separation operation for separating the package from the traversing drum. The second control is a control for causing the lifting mechanism to perform a contact operation for causing the package to contact with the traversing drum again. The third control is a control for causing the suction extraction mechanism to perform a preparation operation for enabling the suction extraction operation of the suction extraction mechanism to be started. In the third control, the unit control unit operates the suction lead-out mechanism such that the preparation operation is started before the completion of the contact operation and the preparation operation is completed after the completion of the contact operation.

Description

Technical Field

[0001] The invention relates to a yarn winding machine. Background Art

[0002] The winding unit (yarn winding machine) disclosed in Patent Document 1 makes the package contact with the winding drum (contact roller), rotates the contact roller to make the package rotate, and traverses and winds the yarn supplied from the yarn supply section. In the case where the traveling yarn is disconnected for some reason, the disconnected yarn is spliced ​​(connected) by the yarn splicing device. More specifically, when the yarn is disconnected, the package is separated from the contact roller (i.e., the package is raised), and the package and the contact roller are decelerated. Then, the package is brought into contact with the contact roller (i.e., the package is lowered). The yarn on the package side of the disconnected yarn is basically wound on the package before the rotation of the package stops. In addition, the yarn end on the package side and the yarn end on the yarn supply side are respectively sucked and captured by the corresponding suction parts and guided to the yarn splicing device. Thus, the two yarn ends are spliced.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-11377

[0006] In order to shorten the time required from when the running yarn is disconnected to when the yarn joining is completed, a control method has been studied to start the operation of the suction unit for attracting and capturing the yarn end on the package side in advance. However, it is known that if the moment when the suction unit attracts the yarn end is too early, the following problems will occur. That is, when the running yarn is disconnected, a part of the layer of yarn wound on the package (hereinafter referred to as the yarn layer) sometimes relaxes on the surface of the package. In this way, a gap is generated between the relaxed yarn layer and the surface of the package. If the suction force of the suction unit is generated near the package before the lifted package is lowered, the yarn end on the package side or the relaxed yarn layer moves, which may cause the yarn end to pass through the gap. When the package is lowered with the yarn end passing through the gap, the yarn end is sandwiched between the relaxed yarn layer and the yarn layer further inside it. When the yarn end or its vicinity (hereinafter referred to as the yarn end, etc.) is fixed to the package and cannot move, the yarn end, etc. sucked and held by the suction section may fall off from the suction section while being guided to the yarn splicing device. In addition, even if the yarn end, etc. is guided to the yarn splicing device, if the yarn is spliced ​​with the yarn end, etc. passing through the above-mentioned gap, a yarn layer in a bad state that causes poor unwinding in the subsequent process may be mixed into the package. Summary of the invention

[0007] An object of the present invention is to minimize the time from yarn breakage to yarn splicing completion and to prevent a yarn end on a package side from passing through a gap formed between a slackened yarn layer and a surface of the package.

[0008] The yarn winding machine of the first invention comprises: a yarn supplying section which can supply yarn; a winding section which performs a winding action in which the yarn supplied from the yarn supplying section is wound to form a package; a yarn connecting mechanism which connects the disconnected yarn when the yarn is disconnected between the yarn supplying section and the winding section; and a control section, characterized in that the winding section comprises: a contact roller which contacts the surface of the package and rotates together with the package; and a lifting mechanism which can perform a separation action in which the surface of the package and the outer peripheral surface of the contact roller are separated from each other, and a contact action in which the surface of the package and the outer peripheral surface of the contact roller are brought close to each other and contacted, and the yarn connecting mechanism comprises a suction and drawing mechanism which can perform a suction and drawing action in which the yarn is drawn. , the yarn end of the winding section side of the disconnected yarn is sucked and captured by the suction port, and the yarn end is drawn out from the package rotating in the opposite direction to the winding action, and the control section is configured to be able to perform the following controls: a first control, when the yarn is disconnected between the yarn supply section and the winding section, the lifting mechanism is caused to perform the separation action; a second control, after the first control, the lifting mechanism is caused to perform the contact action; and a third control, the suction and lead-out mechanism is caused to perform a prescribed preparatory action, the preparatory action is used to enable the suction and lead-out action to start, and in the third control, the suction and lead-out mechanism is caused to operate in a manner that the preparatory action is started before the contact action is completed by the second control and the preparatory action is completed after the contact action is completed.

[0009] In the present invention, the preparatory action of the suction and extraction mechanism starts before the contact action is completed. Thus, it is possible to suppress the start time of the suction and extraction action from being extremely delayed. Therefore, it is possible to suppress the time from when the yarn is disconnected to when the yarn is joined to be prolonged. In addition, in the present invention, the preparatory action can be completed after the contact action is completed. Thus, it is possible to suppress the yarn end from moving before the contact action is completed. Therefore, it is possible to suppress the yarn end on the package side from passing through the gap generated between the relaxed yarn layer and the surface of the package. Thus, it is possible to suppress the time from when the yarn is disconnected to when the yarn is joined to be prolonged, and it is possible to suppress the yarn end on the package side from passing through the gap generated between the relaxed yarn layer and the surface of the package.

[0010] A yarn winding machine according to a second invention is characterized in that, in the first invention, the control section executes the third control when the running yarn is broken when the control section controls the winding section to increase the circumferential speed of the package.

[0011] When the circumferential speed of the package increases, that is, when the circumferential speed of the package is lower than the target speed. When the yarn is broken in a state where the circumferential speed of the package is still low, the package stops rotating in a shorter time than when the yarn is broken in a state where the circumferential speed of the package is sufficiently high (that is, the circumferential speed reaches the target speed). The following is a description of the problems that may arise at this time. First, generally, tension is applied to the traveling yarn wound by the winding section. When the traveling yarn is broken, the yarn end on the package side shows a behavior of jumping toward the package side due to the tension. In addition, as described above, when the traveling yarn is broken, the yarn on the package side is wound on the package before the package stops rotating. However, as described above, in a condition where the package stops rotating in a short time, the circumferential speed of the package becomes quite low before the yarn end on the package side is wound. At this time, it is difficult for the yarn end to be wound on the package. In addition, if the momentum of the above-mentioned movement of the yarn end does not stop, the yarn already wound on the package near the yarn end may also relax. Through the above-mentioned action, when the yarn is disconnected in a state where the circumferential speed of the package is still low, a loose yarn layer is easily formed. As a result, a gap is easily formed between the loose yarn layer and the surface of the package, and the possibility of the yarn end on the package side passing through the gap increases. In the present invention, by performing the third control under such a condition, the situation where the yarn end on the package side passes through the above-mentioned gap can be effectively suppressed. On the contrary, when the circumferential speed of the package is sufficiently high, all the yarns on the package side are fully wound on the package during the period from when the yarn is disconnected to when the package rotation stops. Therefore, the possibility of the disconnected yarn being wound on the package in a loose state is reduced. Therefore, when the yarn is disconnected in a state where the circumferential speed of the package is sufficiently high, control to complete the preparatory action before the contact action is completed can be performed instead of the third control. As a result, the time from when the yarn is disconnected to when the yarn joining is completed can be shortened.

[0012] The yarn winding machine of the third invention is based on the above-mentioned first or second invention, and is characterized in that the suction and extraction mechanism has: a fluid passage, which connects the suction port and a suction source that generates negative pressure at the suction port; and a gate part, which is configured to be able to open and close the fluid passage, and the preparatory action includes a first preparatory action of the gate part to open the fluid passage, and the control part causes the gate part to move in the third control in a manner that completes the first preparatory action after the contact action is completed.

[0013] In the present invention, it is possible to suppress the strong negative pressure from being generated in the suction port before the contact action is completed. Therefore, it is possible to effectively suppress the yarn end from moving due to the negative pressure before the contact action is completed.

[0014] The yarn winding machine of the fourth invention is based on any one of the first to third inventions, and is characterized in that the suction and extraction mechanism has a moving mechanism, which moves the suction port between a specified standby position and a suction position that is closer to the package than the standby position and is used to attract the yarn end, and the preparation action includes a second preparation action in which the moving mechanism moves the suction port from the standby position to the suction position, and the control unit causes the moving mechanism to operate in the third control in such a manner as to complete the second preparation action after the contact action is completed.

[0015] In the present invention, the suction port can be prevented from reaching the suction position before the contact action is completed. Therefore, even when the suction port generates negative pressure, the yarn end can be effectively prevented from moving due to the negative pressure before the contact action is completed.

[0016] The yarn winding machine of the fifth invention is based on the above-mentioned first or second invention, and is characterized in that the suction and extraction mechanism has: a moving mechanism, which moves the suction port between a specified standby position and a suction position that is closer to the package than the standby position and is used to suck the yarn end; a fluid passage, which connects the suction port and a suction source that generates negative pressure at the suction port; and an opening and closing part, which is configured to be linked with the moving mechanism, so that the fluid passage is in a closed state when the suction port is in the standby position, and in an open state when the suction port is in the suction position, the fluid passage is in an open state, the preparation action includes a moving action of moving the suction port from the standby position to the suction position, and the control part causes the moving mechanism to operate in the third control in such a way that the moving action is completed after the contact action is completed.

[0017] In the present invention, the suction port can be prevented from reaching the suction position before the contact action is completed, and a strong negative pressure can be suppressed from being generated in the suction port before the contact action is completed. Therefore, the yarn end can be effectively suppressed from moving due to the negative pressure before the contact action is completed.

[0018] A yarn winding machine according to a sixth invention is characterized in that, in any one of the first to fifth inventions, the contact roller has a traverse groove formed on the outer peripheral surface of the contact roller for traversing the running yarn.

[0019] The contact roller is generally configured to apply contact pressure to the surface of the package. Thereby, it is possible to suppress the slack of the yarn wound on the package. On the other hand, in the present invention, the yarn is transversely moved through the transverse groove. In such a structure, unlike a structure without a transverse groove on the outer peripheral surface of the contact roller, the yarn wound on the package does not contact the outer peripheral surface of the contact roller. In other words, the contact pressure is applied only to the yarn after being wound on the package. In addition, when the traveling yarn is disconnected, the package and the contact roller are separated by the first control. For these reasons, when the yarn is cut, the part of the yarn that has not been wound on the package is not pressed against the surface of the package, and therefore the possibility of being included in the package in a state of being separated from the surface increases. Therefore, in the above-mentioned structure, the possibility of forming the above-mentioned gap increases. Therefore, it is particularly effective to perform the third control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the automatic winder according to the present embodiment.

[0021] Figure 2 This is a block diagram showing the electrical structure of the automatic winder.

[0022] Figure 3 This is a schematic front view of the yarn winding unit.

[0023] Figure 4 It is a schematic side view of a part of the yarn winding unit in the vertical direction.

[0024] Figure 5 (a) and (b) are diagrams showing the operation of the winding unit.

[0025] Figure 6 (a) and (b) are diagrams showing the operations of the yarn processing execution section and the winding section.

[0026] Figure 7 (a) to (c) are reference diagrams showing problems caused by the slack of the yarn on the surface of the package.

[0027] Figure 8 This is a flowchart showing the flow from when the running yarn is disconnected to when the winding operation is restarted.

[0028] Fig. 9 Yes means Figure 8 A flowchart showing details of a part of the processing included in the flowchart.

[0029] Fig.10 This is a flowchart related to a modification example.

[0030] Fig.11 This is a flowchart related to another modification example.

[0031] Fig.12 (a) and (b) are views showing an upper yarn catching and guiding portion and its surroundings according to still another modified example.

[0032] Description of Reference Numerals

[0033] 2 Yarn winding unit (yarn winding machine)

[0034] 11 Yarn supply department

[0035] 12 Yarn processing execution unit (yarn connecting mechanism)

[0036] 13 Winding unit (yarn connecting mechanism)

[0037] 15 unit control unit (control unit)

[0038] 36 Upper yarn catching and guiding part (suction and drawing mechanism)

[0039] 36c suction port

[0040] 38 arm motor (moving mechanism)

[0041] 39 Gate part (attraction and extraction mechanism)

[0042] 42 Traverse roller (contact roller)

[0043] 42a Traverse slot

[0044] 42b Outer Surface

[0045] 44 Lifting mechanism

[0046] 61 Opening and closing part

[0047] 101a Fluid Path

[0048] 102 Negative pressure source (suction source)

[0049] P roll

[0050] Pa Surface

[0051] Y Yarn

[0052] Ye Yarn End DETAILED DESCRIPTION

[0053] The embodiments of the present invention are described. Figure 1 As shown, the direction in which a plurality of yarn winding units 2 described later are arranged is defined as the left-right direction. The direction in which gravity acts is defined as the up-down direction. The direction orthogonal to both the left-right direction and the up-down direction is defined as the front-back direction.

[0054] (Schematic structure of automatic winder)

[0055] First, refer to Figure 1 and Figure 2 A schematic configuration of the automatic winder 1 according to the present embodiment will be described. Figure 1 It is a front view of the automatic winder 1. Figure 2 1 is a block diagram showing the electrical structure of the automatic winding machine 1. Figure 1 and Figure 2 As shown, the automatic winder 1 includes a plurality of yarn winding units 2, a doffing device 3, and a machine control device 4. The plurality of yarn winding units 2 respectively correspond to the yarn winding machine of the present invention.

[0056] The plurality of yarn winding units 2 are each configured to wind the yarn Y drawn out from the yarn supply bobbin Bs onto the winding bobbin Bw (see Figure 3 ) to form a package P. Figure 1 As shown, a plurality of yarn winding units 2 are arranged in the left-right direction.

[0057] The doffing device 3 is configured to remove the fully wound package P from the yarn winding unit 2 and to attach an empty winding bobbin Bw to the yarn winding unit 2. Figure 1 As shown, the doffing device 3 is arranged above the plurality of yarn winding units 2. The doffing device 3 is configured to be movable in the left-right direction. When receiving a signal indicating that the package P is fully wound from the yarn winding unit 2, the doffing device 3 moves above the yarn winding unit 2 to perform the above operation.

[0058] like Figure 1 As shown, the machine control device 4 is, for example, arranged on the left side of the plurality of yarn winding units 2. The machine control device 4 and the unit control unit 15 of the yarn winding unit 2 (see Figure 2 ) and the control unit (not shown) of the yarn dropping device 3 to communicate with these control units.

[0059] (Yarn winding unit)

[0060] Next, refer to Figure 2 to Figure 4 The structure of the yarn winding unit 2 will be described. Figure 3 It is a schematic front view of the yarn winding unit 2. Figure 4 It is a schematic side view of a part of the yarn winding unit 2 in the up-down direction.

[0061] like Figure 3As shown, the yarn winding unit 2 includes a frame 10, a yarn supply unit 11, a yarn processing execution unit 12, a winding unit 13, and a unit control unit 15. The frame 10 is, for example, a hollow member extending in the up-down direction. The setting position of the frame 10 is fixed. The yarn supply unit 11, the yarn processing execution unit 12, and the winding unit 13 are provided on the frame 10, and are arranged in this order from the upstream to the downstream of the yarn path where the yarn Y travels. The unit controller 15 is, for example, accommodated inside the frame 10. The unit controller 15 is equivalent to the control unit of the present invention.

[0062] The yarn supply section 11 is configured to supply the yarn Y wound on the yarn supply bobbin Bs according to the unwinding. The yarn supply section 11 includes a yarn supply bobbin support section 21 and a yarn unwinding auxiliary device 22. The yarn supply bobbin support section 21 supports the yarn supply bobbin Bs in a substantially upright state. The yarn unwinding auxiliary device 22 restricts the expansion of the yarn Y when it is unwound from the yarn supply bobbin Bs by means of a restriction cylinder 23. The restriction cylinder 23 is configured to move downward as the amount of yarn wound on the yarn supply bobbin Bs decreases, and to maintain the size of the above-mentioned expansion at a constant size.

[0063] The yarn processing execution section 12 executes various processes related to the yarn Y. The yarn processing execution section 12 includes a yarn detector 31 , a tension applying device 32 , a yarn joining device 33 , and a yarn clearer 34 .

[0064] The yarn detector 31 is configured to detect the presence of the yarn Y between the yarn unwinding auxiliary device 22 and the tension applying device 32. The tension applying device 32 is configured to apply a predetermined tension to the traveling yarn Y. As an example of the tension applying device 32, a so-called gate-type tension applying device can be cited. Figure 3 As shown, the plurality of fixed gates 32a and the plurality of movable gates 32b are alternately arranged in the vertical direction. By adjusting the horizontal position of the plurality of movable gates 32b, a predetermined tension is applied to the yarn Y running between the fixed gates 32a and the movable gates 32b.

[0065] The yarn joining device 33 is configured to join the yarn Y on the yarn supply section 11 side and the yarn Y on the winding section 13 side when the yarn Y is disconnected between the yarn supply section 11 and the winding section 13. Hereinafter, for the sake of convenience, the yarn Y on the yarn supply section 11 side of the disconnected yarn Y is referred to as the lower yarn Y1. Similarly, the yarn Y on the winding section 13 side (i.e., the yarn Y on the package P side) is referred to as the upper yarn Y2. As an example of the yarn joining device 33, a compressed air type yarn joining device can be cited. The yarn joining device 33 blows compressed air supplied from a compressed air source not shown in the figure to the lower yarn Y1 and the upper yarn Y2 to temporarily untie the yarn ends on both sides. Then, the yarn joining device 33 blows compressed air to the yarn ends on both sides again to entangle the yarn ends with each other, thereby joining the yarns.

[0066] A lower yarn catching guide portion 35 is provided on the lower side of the yarn joining device 33 for catching the lower yarn Y1 and guiding it to the yarn joining device 33. The lower yarn catching guide portion 35 has a shaft 35a, an arm 35b and a suction port 35c. The shaft 35a extends, for example, in the left-right direction. The arm 35b is a tubular member that can rotate around the shaft 35a. The suction port 35c is arranged at the top end of the arm 35b. The suction port 35c is configured to be able to suck and catch the yarn end of the lower yarn Y1. The arm 35b is driven to rotate by an arm motor 37.

[0067] An upper yarn catching guide portion 36 for catching the upper yarn Y2 and guiding it to the yarn joining device 33 is provided on the upper side (downstream) of the yarn joining device 33. The upper yarn catching guide portion 36 has a shaft 36a, an arm 36b and a suction port 36c. The shaft 36a extends, for example, in the left-right direction. The arm 36b is a tubular member that can rotate around the shaft 36a. The suction port 36c is arranged at the top end of the arm 36b. The suction port 36c is configured to be able to attract and capture the yarn end of the upper yarn Y2. The arm 36b is driven to rotate by an arm motor 38. The arm motor 38 is equivalent to the moving mechanism of the present invention. In the present embodiment, the arm motor 38 is included in the upper yarn catching guide portion 36.

[0068] like Figure 4 As shown, the upper yarn catching guide 36 is connected to the negative pressure source 102 via a duct 101. A fluid passage 101a, for example, for air flow is formed inside the duct 101. The fluid passage 102a is a passage for sucking the yarn Y from the suction port 36c to the negative pressure source 102 side together with the air. The negative pressure source is, for example, a known blower device. The negative pressure source 102 may be, for example, commonly provided in a plurality of yarn winding units 2. The negative pressure source 102 corresponds to the suction source of the present invention. In this case, although the illustration is omitted, a common duct, for example, commonly provided in a plurality of yarn winding units 2, is arranged between the duct 101 and the negative pressure source 102 in the air flow direction. Using the negative pressure generated in the suction port 36c, the air is sucked into the negative pressure source 102 through the arm 36b, the duct 101 and the common duct. As a result, the yarn Y is sucked into the suction port 36c together with the air and is sucked and caught by the upper yarn catching guide 36. The lower yarn catching guide section 35 is also connected to the negative pressure source 102 via a duct (not shown). The operation of the lower yarn catching guide section 35 and the upper yarn catching guide section 36 during yarn joining will be described later.

[0069] like Figure 4As shown, a gate portion 39 configured to open and close the fluid passage 101a is arranged in the middle of the fluid passage 101a. The middle portion refers to the portion between the suction port 36c and the negative pressure source 102 in the suction direction of the suction yarn Y. The gate portion 39 has, for example, a gate 39a and a gate motor 39b. The gate 39a can switch between a closed state in which the fluid passage 101a is closed and an open state in which the fluid passage 101a is opened. When the gate 39a is in an open state, the space near the suction port 36c is connected to the negative pressure source 102, and negative pressure is generated in the suction port 36c and its vicinity. The gate 39a is driven to move by the gate motor 39b. The gate motor 39b is, for example, a known stepping motor. The gate motor 39b is, for example, electrically connected to the unit control unit 15. The mechanism of the upper yarn catching guide 36 and the gate portion 39 together is equivalent to the suction and extraction mechanism of the present invention.

[0070] The yarn clearer 34 is configured to obtain information about the thickness of the traveling yarn Y. The yarn clearer 34 detects a yarn defect based on the information. A cutter 34a is arranged near the yarn clearer 34. When the yarn defect is detected by the yarn clearer 34, the cutter 34a immediately cuts the yarn Y. At the same time, the yarn clearer 34 outputs a detection signal to the unit control unit 15.

[0071] The winding section 13 is configured to be able to perform a winding operation of winding the yarn Y around the winding bobbin Bw to form a package P. Figure 3 As shown, the winding section 13 has a cradle 41 , a traverse roller 42 , a roller drive motor 43 , and a lifting mechanism 44 .

[0072] The cradle 41 is configured to rotatably hold the winding tube Bw (package P). Figure 3 As shown, the cradle 41 supports the winding tube Bw by a cradle arm 41a and a cradle arm 41b. The cradle arm 41a is arranged on the right side of the winding tube Bw. The cradle arm 41b is arranged on the left side of the winding tube Bw. The arrangement of the cradle arm 41a and the cradle arm 41b may be reversed. The cradle arms 41a and 41b are swingably supported by the swing shaft 41c. The cradle 41 is configured to be able to be moved in a contact position (see Figure 4 and Figure 5 (b) double-dashed line) and the separation position (refer to Figure 5 The contact position is the position of the cradle 41 when the package P is in contact with the traverse roller 42. The surface Pa of the package P located at the contact position is pressed against the outer peripheral surface 42b of the traverse roller 42. The separation position is the position of the cradle 41 when the package P is separated from the traverse roller 42. The cradle 41 is provided with a brake portion 45 configured to brake the rotation of the package P. The brake portion 45 is mounted on the cradle arm 41a, for example. A rotation sensor (not shown) for detecting the rotation speed of the package P may be arranged on the cradle 41 or in the vicinity thereof, for example.

[0073] The traverse roller 42 is configured to rotate the package P and to traverse the traveling yarn Y. The traverse roller 42 is equivalent to the contact roller of the present invention. Figure 3 and Figure 4 As shown, the traverse roller 42 is a substantially cylindrical member. The rotation axis of the traverse roller 42 is substantially parallel to the left-right direction. A traverse groove 42a for traversing the yarn Y is formed on the outer peripheral surface 42b of the traverse roller 42. The traverse roller 42 rotates in contact with the surface Pa of the package P, and the package P is driven to rotate by friction. In response, the traverse roller 42 rotates while passing the yarn Y through the traverse groove 42a, so that the yarn Y is traversed in the left-right direction. As a result, the yarn Y is wound around the winding tube Bw while traversing. In addition, the traverse roller 42 has a function of adjusting the shape of the package P. That is, the surface Pa of the package P is pressed against the outer peripheral surface 42b of the traverse roller 42, and thus, a contact pressure is applied to the surface Pa by the outer peripheral surface 42b.

[0074] The drum drive motor 43 is configured to drive the traverse drum 42 to rotate. The drum drive motor 43 can drive the traverse drum 42 to rotate in two directions, the forward direction and the reverse direction. The forward direction is the rotation direction of the traverse drum 42 when the yarn Y is wound on the winding tube Bw. The reverse direction is the rotation direction of the traverse drum 42 when the upper yarn Y2 is drawn out from the package P during yarn splicing. The drum drive motor 43 is electrically connected to the unit control unit 15 (see Figure 2 The drum drive motor 43 may also include a rotary encoder (not shown) for detecting the rotation speed of the traverse drum 42. Alternatively, a rotation speed sensor (not shown) may be disposed near the traverse drum 42.

[0075] The lifting mechanism 44 is configured to be able to lift and lower the package P. Figure 3 As shown, the lifting mechanism 44 has, for example, a cylinder 44a and a lifting member 44b. The cylinder 44a has a piston rod (not shown) that can be extended and retracted by, for example, the action of compressed air. The cylinder 44a is configured so that, for example, the piston rod is extended when compressed air is supplied, and the piston rod is retracted when the compressed air is discharged. The lifting member 44b is supported on, for example, the piston rod. The lifting member 44b supports, for example, the cradle arm 41a. The lifting member 44b swings the cradle 41 (that is, raises or lowers the package P) according to the extension and retraction of the piston rod. The supply of compressed air to the cylinder 44a and the discharge of compressed air from the cylinder 44a can also be controlled by, for example, a solenoid valve (not shown). The solenoid valve is electrically connected to, for example, the unit control unit 15. That is, the lifting mechanism 44 is electrically connected to the unit control unit 15 (refer to Figure 2 ).

[0076] The lifting mechanism 44, for example, when compressed air is not supplied to the air cylinder 44a, positions the cradle 41 at a position where the surface Pa of the package P and the outer peripheral surface 42b of the traverse roller 42 are in contact with each other. The lifting mechanism 44, for example, when compressed air is supplied to the air cylinder 44a, lifts the package P. As a result, the surface Pa of the package P is separated from the outer peripheral surface 42b of the traverse roller 42. Hereinafter, the lifting action of the package P is also referred to as a separation action. In addition, the lifting mechanism 44, for example, when compressed air is discharged from the air cylinder 44a, lowers the package P. As a result, the package P approaches the traverse roller 42, and the surface Pa of the package P is in contact with the outer peripheral surface 42b of the traverse roller 42. Hereinafter, the action of lowering the package P is also referred to as a contact action. In the present embodiment, the contact action is started when the above-mentioned solenoid valve of the lifting mechanism 44 is opened. When the surface Pa of the package P is in contact with the outer peripheral surface 42b of the traverse roller 42, the contact action is completed.

[0077] The unit control unit 15 includes, for example, a CPU, a ROM, and a RAM (not shown). The unit control unit 15 controls each unit through the CPU according to the program stored in the ROM. More specifically, the unit control unit 15 controls the yarn joining device 33, the arm motor 37, the arm motor 38, the gate motor 39b, the drum drive motor 43, the lifting mechanism 44, etc. (see Figure 2 ). In addition, the unit control section 15 receives a signal from the yarn clearer 34 and the like (see Figure 2 ). In addition, the unit control section 15 outputs a signal for requesting doffing to the doffing device 3. This signal is sent to the control section (not shown) of the doffing device 3 via the machine control device 4.

[0078] In the yarn winding unit 2 having the above configuration, the unit control section 15 drives the drum driving motor 43 to rotate the traverse drum 42 while the package P is in contact with the traverse drum 42. As a result, the yarn Y drawn out from the yarn supplying bobbin Bs is wound around the winding bobbin Bw to form the package P (winding operation).

[0079] (Operation of the yarn winding unit during yarn joining)

[0080] Reference Figure 5 (a)~ Figure 6 (b) will now explain the operation of the yarn winding unit 2 during yarn joining. Figure 5 (a) is a diagram showing the state of the winding unit 13 during the winding operation. Figure 5 (b) is a diagram showing the state of the winding section 13 after the traveling yarn Y is cut. Figure 6 (a) is a diagram showing the states of the yarn processing execution section 12 and the winding section 13 after the yarn processing execution section 12 completes the above-described preparatory operation. Figure 6(b) is a diagram showing the states of the yarn processing execution section 12 and the winding section 13 after the yarn processing execution section 12 completes the suction and pulling operation described above.

[0081] In the winding action (refer to Figure 5 During the process of (a)), the traveling yarn Y is sometimes disconnected. Examples of reasons why the yarn Y is disconnected are as follows. For example, when excessive tension is accidentally applied to the yarn Y, yarn breakage occurs and the yarn Y is disconnected. For example, when a yarn defect is detected by the yarn clearer 34 and the cutter 34a cuts the yarn Y, the yarn Y is also disconnected.

[0082] When the yarn Y is disconnected, the winding section 13 stops the winding operation. More specifically, the lifting mechanism 44 raises the package P (separation operation. See Figure 5 (b)). The main purpose of the separation action is to avoid damage caused by friction between the surface Pa and the traverse drum 42 when the package P stops rotating. After the package P is raised, the drum drive motor 43 stops the rotation of the traverse drum 42. The brake unit 45 stops the rotation of the package P. Before the rotation of the package P is stopped, the part of the yarn Y on the package P side that has been disconnected, that is, the upper yarn Y2 is wound on the package P. As a result, the yarn end of the upper yarn Y2 is included in the package P that has stopped rotating.

[0083] For example, after the rotation of the traverse drum 42 and the rotation of the package P stop, the yarn processing execution section 12 and the winding section 13 perform yarn joining. During the yarn joining, the lifting mechanism 44 lowers the package P at an appropriate timing. The details will be described later.

[0084] Furthermore, when joining the yarn, the upper yarn catching and guiding section 36 and the shutter section 39 of the yarn processing execution section 12 perform the following preparatory operation. The preparatory operation is a predetermined operation performed before the suction and drawing operation described later to enable the suction and drawing operation to start.

[0085] Before the preparatory operation is performed, the arm 36b is located at a predetermined standby position (see Figure 5 (b)). In addition, the gate portion 39 (refer to Figure 4 ) is in a closed state. In the preparation action, the gate portion 39 switches the gate 39a from a closed state to an open state. As a result, the closed fluid passage 101a is opened, and a negative pressure that can attract and capture the yarn end of the upper yarn Y2 is generated inside the suction port 36c. The movement of the gate portion 39 from a state of closing the fluid passage 101a to a state of opening the fluid passage 101a is equivalent to the first preparation action of the present invention. The first preparation action is included in the preparation action. In addition, in the preparation action, the arm 36b is rotationally driven by the arm motor 38 and rotates upward from the standby position. As a result, the suction port 36c moves to a position closer than the standby position (refer to Figure 6The double-dashed line (a) is closer to the suction position of the package P (refer to Figure 6 The suction position is a position near the package P, and is a position for sucking the yarn end of the upper yarn Y2. Such an action of the upper yarn catching guide 36 is equivalent to the second preparatory action of the present invention. The second preparatory action is included in the preparatory action.

[0086] After the preparation action is completed, the upper yarn catching guide section 36 performs the following suction and drawing action. The upper yarn catching guide section 36 cooperates with the winding section 13 to draw out the yarn end of the upper yarn Y2 from the package P that rotates in the opposite direction to the winding action. More specifically, the drum drive motor 43 rotates and drives the traverse drum 42 in the opposite direction to the winding action. As a result, the package P rotates in the opposite direction to the winding action. Approximately simultaneously with such reverse rotation of the package P, the suction port 36c begins to attract the yarn end of the upper yarn Y2 and captures the yarn end (suction and capture). After the upper yarn Y2 is attracted and captured, the arm 36b is driven by the arm motor 38 to rotate downward. As a result, as shown in FIG. Figure 6 As shown in (b) of FIG. 1 , the upper yarn Y2 is guided toward the yarn joining device 33 by the upper yarn catching and guiding section 36. The above operation of the upper yarn catching and guiding section 36 is a suction and drawing operation.

[0087] Although the illustration is omitted, the lower yarn catching guide 35 and the upper yarn catching guide 36 suck and catch the yarn end of the lower yarn Y1 through the suction port 35c at substantially the same time. In addition, the arm 35b is driven by the arm motor 37 to rotate upward. Thus, the lower yarn catching guide 35 guides the lower yarn Y1 to the yarn joining device 33. The yarn joining device 33 joins (connects) the lower yarn Y1 guided by the lower yarn catching guide 35 and the upper yarn Y2 guided by the upper yarn catching guide 36. Thus, the yarn joining is completed and the winding operation can be restarted.

[0088] As described above, the yarn processing execution section 12 and the winding section 13 cooperate to perform the yarn joining. The combined mechanism of the yarn processing execution section 12 and the winding section 13 corresponds to the yarn joining mechanism of the present invention.

[0089] (Moment of attraction and capture of the yarn end)

[0090] In order to shorten the time required from the breaking of the running yarn Y to the completion of the yarn joining, the control of making the upper yarn catching guide 36 start the operation in advance is studied. However, it is known that if the moment of starting to attract the yarn end is too early, the following problems will occur. Figure 7 (a)~ Figure 7 (c) is described below. Figure 7 (a)~ Figure 7(c) is a reference diagram showing a problem caused by the slack of the upper yarn Y2 on the surface Pa of the package P. Figure 7 (a) and Figure 7 (b) is a side view of a portion of the yarn winding unit 2 in the up-down direction. Figure 7 (c) is also a schematic top view.

[0091] As described above, when the yarn Y is disconnected during the winding operation, the package P is raised by the lifting mechanism 44. Then, the rotation of the package P is stopped. During the period before the rotation of the package P is stopped, the disconnected upper yarn Y2 is wound on the package P. After the package P is raised, when a layer of yarn Y (yarn layer) is formed on the surface Pa of the package P, the surface Pa of the package P is separated from the outer peripheral surface 42b of the traverse roller 42. As a result, the upper yarn Y2 is wound without applying contact pressure to the surface Pa. Therefore, as Figure 7 As shown in (a), sometimes a part of the yarn layer is loose on the surface Pa of the package P. In this way, a gap G is generated between the loosened yarn layer and the surface Pa of the package P. In addition, it should be noted that the gap G is slightly exaggerated to facilitate viewing of the drawings.

[0092] Furthermore, before the contact action is completed, there is a yarn end Ye of the upper yarn Y2 (refer to Figure 7 (a)~ Figure 7 (c)) is sucked by the suction port 36c. Figure 7 (b) and Figure 7 As shown in (c), the yarn end Ye may move and pass through the gap G. When the contact action is performed in the state where the yarn end Ye passes through the gap G, the yarn end Ye is sandwiched between the loose yarn layer and the yarn layer further inside. In the case where the yarn end Ye or its vicinity (hereinafter referred to as the yarn end Ye, etc.) is fixed to the package P and cannot move, the yarn end Ye, etc. may fall off from the suction port 36c while being guided to the yarn joining device 33. In this case, an undesirable situation occurs in which the yarn joining cannot be performed. In addition, even if it is assumed that the yarn end Ye, etc. is guided to the yarn joining device 33, if the yarn joining is performed in the state where the yarn end Ye, etc. passes through the gap G, the yarn layer in an undesirable state that causes poor unwinding in the subsequent process will be mixed into the package P.

[0093] Therefore, in order to minimize the time from when the yarn Y is broken to when the yarn joining is completed and to prevent the yarn end Ye from passing through the gap G generated between the relaxed yarn layer and the surface Pa of the package P, the following control is performed in the yarn winding unit 2.

[0094] (Control from stopping to restarting the winding operation)

[0095] Main reference Figure 8 and Fig. 9 The control performed by the unit control unit 15 from the stop to the restart of the winding operation will be described with reference to the flowchart of FIG. Figure 8 This is a flowchart showing the flow from when the running yarn Y is disconnected to when the winding operation is restarted. Fig. 9 Yes means Figure 8 A flowchart showing details of a portion of the processing included in the flowchart (more specifically, step S102 described later).

[0096] As an initial state, a winding operation is performed in the yarn winding unit 2. During the winding operation, the yarn Y is disconnected for some reason ( Figure 8 The disconnection of the yarn Y is detected by, for example, the yarn clearer 34. The yarn clearer 34 outputs a detection signal indicating that the yarn Y is disconnected.

[0097] When receiving the detection signal, the unit control section 15 controls the winding section 13 to stop the winding operation (step S102). More specifically, in step S102, the unit control section 15 causes the lifting mechanism 44 to lift the package P (separation operation). The control of the unit control section 15 causing the lifting mechanism 44 to perform the separation operation corresponds to the first control of the present invention. In addition, in step S102, the unit control section 15 controls the drum drive motor 43 to stop the rotation of the traverse drum 42. In addition, in step S102, the unit control section 15 controls the brake section 45 to stop the rotation of the package P. In addition, in step S102, the unit control section 15 causes the suction and extraction mechanism (upper yarn catching guide section 36 and gate section 39) to perform the above-mentioned preparatory operation, and causes the lifting mechanism 44 to perform the contact operation. The control of the unit control section 15 causing the suction and extraction mechanism to perform the preparatory operation corresponds to the third control of the present invention. In addition, the control of the unit control section 15 causing the lifting mechanism 44 to perform the contact operation corresponds to the second control of the present invention. More details of step S102 will be described later.

[0098] After step S102, the unit control section 15 controls the yarn processing execution section 12 and the winding section 13, and guides the upper yarn Y2 and the lower yarn Y1 to the yarn joining device 33 (step S103). More specifically, the unit control section 15 controls the drum drive motor 43 and the arm motor 38 as described above, and guides the upper yarn Y2 sucked and caught by the suction port 36c to the yarn joining device 33. In addition, the unit control section 15 controls the arm motor 37, and guides the lower yarn Y1 sucked and caught by the suction port 35c to the yarn joining device 33.

[0099] Next, the unit control section 15 controls the yarn joining device 33 to join the upper yarn Y2 and the lower yarn Y1 (step S104). Finally, the unit control section 15 controls the winding section 13 to restart the winding operation (step S105).

[0100] (Details of preparation actions, etc.)

[0101] Next, refer to Fig. 9 The details of the above step S102 are described below. First, upon receiving the above detection signal, the unit control unit 15 executes the following two processes in parallel, for example. Hereinafter, for the sake of convenience, the two processes are referred to as the first process and the second process, respectively.

[0102] The first process will be described. First, the unit control unit 15 causes the lifting mechanism 44 to lift the package P (the above-mentioned separation operation. Step S201). Next, the unit control unit 15 controls the roller drive motor 43 to stop the rotation of the traverse roller 42, and controls the brake unit 45 to stop the rotation of the package P. The unit control unit 15 determines whether the traverse roller 42 has stopped rotating (Step S202), for example, based on the detection result of the above-mentioned rotary encoder (not shown). The unit control unit 15 waits, for example, before the traverse roller 42 stops rotating (Step S202: No), and after the traverse roller 42 stops rotating (Step S202: Yes), the unit control unit 15 proceeds to the next process. The unit control unit 15 determines, for example, based on the detection result of the above-mentioned rotation speed sensor (not shown), whether the package P has stopped rotating (Step S203). The unit control unit 15 waits, for example, before the package P stops rotating (Step S203: No), and after the package P stops rotating (Step S203: Yes), the unit control unit 15 proceeds to the next process. After the rotation of the traverse roller 42 and the package P stops, the unit control unit 15 controls the lifting mechanism 44 to start the contact operation (step S204). The above process is the first process. In addition, the order of step S202 and step S203 can also be reversed. Alternatively, the unit control unit 15 can also execute steps S202 and S203 in parallel.

[0103] The second process is described. The unit control unit 15 causes the yarn processing execution unit 12 to start at least a part of the preparation action in parallel with the first process. More specifically, the unit control unit 15 controls (activates) the arm motor 38 of the upper yarn catching guide unit 36, for example, so that the suction port 36c starts to move from the standby position to the suction position (step S205). In other words, the unit control unit 15 starts at least a part of the preparation action (the second preparation action in this embodiment) before the surface Pa of the package P contacts the outer peripheral surface 42b of the traverse roller 42. In this way, by starting the preparation action before the contact action is completed, it is possible to minimize the increase in the time from the disconnection of the yarn Y to the completion of the yarn joining.

[0104] In the present embodiment, the specific timing of starting the second preparatory action is pre-set in the unit control section 15, for example, as follows. For example, the timing may be substantially simultaneous with the completion of the separation action by the lifting mechanism 44, or may be when a predetermined time has passed since the completion of the separation action. Alternatively, the timing may be after the running yarn Y is cut and before or at the same time as the separation action by the lifting mechanism 44 starts. Alternatively, the timing may be substantially simultaneous with the stop of the rotation of the traverse drum 42 and / or the package P. Alternatively, the timing may be when a predetermined time has passed since the stop of the rotation of the traverse drum 42 and / or the package P.

[0105] The unit control unit 15 performs the following processing after the first processing and the second processing. The unit control unit 15 activates the arm motor 38 in consideration of the start time of the second preparatory action, so that, for example, the movement of the suction port 36c to the suction position is completed after the contact action starts and before the contact action is completed (step S206). The arrival of the suction port 36c at the suction position can also be detected by some detection mechanism. For example, a sensor not shown in the figure can be provided to detect the suction port 36c. Alternatively, a rotary encoder not shown in the figure can also be provided on the arm motor 38. Alternatively, the unit control unit 15 can also determine that the suction port 36c has reached the suction position when a specified time has passed since the control of the arm motor 38 was started.

[0106] After the suction port 36c has completed moving to the suction position, the surface Pa of the package P contacts the outer peripheral surface 42b of the traverse roller 42, and the contact operation is completed (step S207). The completion of the contact operation can be detected by any detection mechanism. Alternatively, the unit control unit 15 can also determine that the contact operation is completed when a predetermined time has passed since the start of the contact operation.

[0107] Then, the unit controller 15 controls the gate motor 39b to open the gate 39a (step S208, the first preparatory operation described above). Thus, the preparatory operation is completed after the contact operation of the package P is completed, and the above-mentioned suction and withdrawal operation can be performed. In other words, the unit control unit 15 completes the first preparatory operation after the surface Pa of the package P contacts the outer peripheral surface 42b of the traverse roller 42. Thus, the unit control unit 15 completes the third control.

[0108] In this way, the unit controller 15 operates the gate motor 39b so as to complete the preparatory operation after completing the contact operation.

[0109] The unit control section 15 may be set so that when the yarn Y is disconnected during the winding operation, the yarn processing execution section 12 must perform a preparatory operation. However, in this case, the time required from when the yarn Y is disconnected to when the yarn joining is completed may always be longer. Therefore, it is particularly preferable that the unit control section 15 performs the third control only when the running yarn Y is disconnected when, for example, the circumferential speed of the package P is increased (i.e., the package P is accelerated) by controlling the winding section 13. When the circumferential speed of the package P is increased means, that is, when the circumferential speed of the package P and the traverse speed of the yarn Y are lower than the target speed. When the yarn Y is disconnected in a state where the circumferential speed of the package P is still low, the package P stops rotating in a shorter time than when the yarn Y is disconnected in a state where the circumferential speed of the package P is sufficiently high (i.e., the circumferential speed reaches the target speed). The following is an explanation of the problems that may occur at this time. First, generally, tension is applied to the running yarn Y wound by the winding section 13. When the running yarn Y is disconnected, the yarn end Ye on the package P side shows a behavior of jumping up to the package P side due to the tension. In addition, as described above, when the running yarn Y is disconnected, the yarn Y on the package P side is wound on the package P before the rotation of the package P stops. However, as described above, in the case where the rotation of the package P stops in a short time, the circumferential speed of the package P becomes quite low before the yarn end Ye on the package P side is wound. At this time, it is difficult for the yarn end Ye to be wound on the package P. In addition, the momentum of the above-mentioned behavior of the yarn end Ye does not stop, and the yarn Y wound on the package P near the yarn end Ye may also be loosened. Due to the above-mentioned action, when the yarn Y is disconnected in a state where the circumferential speed of the package P is still low, a loose yarn layer is easily formed. As a result, a gap G is easily formed between the loose yarn layer and the surface Pa of the package P, and the possibility of the yarn end Ye on the package P side passing through the gap G increases. In the present embodiment, by performing the third control under such a situation, it is possible to effectively suppress the yarn end Ye on the package P side from passing through the gap G. On the contrary, when the circumferential speed of the package P is sufficiently high, all the yarns Y on the package P side are fully wound around the package P during the period from when the yarn Y is disconnected to when the rotation of the package P stops. Therefore, the possibility that the disconnected yarn Y is wound around the package P in a loose state is reduced. Therefore, when the yarn Y with high tension is disconnected, the unit control section 15 may complete the preparatory action before the contact action is completed, for example. Thus, the risk of the yarn end Ye on the package P side passing through the gap G can be suppressed, and the time from when the yarn Y is disconnected to when the yarn joining is completed can be shortened.

[0110] As described above, the preparatory action is started before the surface Pa of the package P raised by the lifting mechanism 44 contacts the outer peripheral surface 42b of the traversing drum 42 again. As a result, it is possible to suppress the start time of the suction and drawing action from being extremely delayed. Therefore, it is possible to suppress the time from when the yarn Y is disconnected to when the yarn joining is completed from being prolonged. In addition, it is possible to complete the preparatory action after the contact action is completed. As a result, it is possible to suppress the yarn end Ye from moving before the package P contacts the traversing drum 42. Therefore, it is possible to suppress the yarn end Ye on the package P side from passing through the gap G generated between the relaxed yarn layer and the surface Pa of the package P. As a result, it is possible to suppress the time from when the yarn Y is disconnected to when the yarn joining is completed from being prolonged, and it is possible to suppress the yarn end Ye on the package P side from passing through the gap G generated between the relaxed yarn layer and the surface Pa of the package P.

[0111] In addition, as described above, the unit control section 15 preferably performs the third control when the traveling yarn Y is disconnected while controlling the winding section 13 to increase the circumferential speed of the package P. As a result, as described above, the yarn end Ye on the package P side can be effectively prevented from passing through the gap G. In addition, as described above, the time from when the yarn Y is disconnected to when the yarn joining is completed can be further prevented from being prolonged.

[0112] In addition, the unit control unit 15 operates the gate unit 39 in the third control so that the first preparatory action is completed after the second control is completed. This can prevent a strong negative pressure from being generated in the suction port 36c before the contact action is completed. Therefore, it is possible to effectively prevent the yarn end Ye from moving due to the negative pressure before the contact action is completed.

[0113] In addition, the traverse roller 42 has a traverse groove 42a. Thus, the yarn Y traverses through the traverse groove 42a. In such a structure, the yarn Y to be wound on the package P does not contact the outer peripheral surface 42b of the traverse roller 42. In other words, the contact pressure is applied only to the yarn Y after being wound on the package P. In addition, when the running yarn Y is disconnected, the package P and the traverse roller 42 are separated by the first control. For these reasons, when the yarn Y is disconnected, the part of the yarn Y that has not been wound on the package P is not pressed against the surface Pa of the package P, so the possibility of being included in the package P in a state separated from the surface Pa increases. Therefore, in the above-mentioned structure, the possibility of forming the gap G increases. Therefore, it is particularly effective to perform the third control.

[0114] Next, a modified example of the above-mentioned embodiment will be described. However, the same reference numerals are given to parts having the same configuration as the above-mentioned embodiment, and the description thereof will be omitted as appropriate.

[0115] (1) In the above-mentioned embodiment, the second preparatory action is started before the contact action is completed. In addition, the first preparatory action is started after the contact action is completed. However, the present invention is not limited to this. Fig.10 Other control examples are described in detail with reference to the flowcharts of FIG. Fig.10 is a flowchart showing the details of step S102 in this variation. Fig.10 As shown, the unit control unit 15 performs the first process (the above-mentioned steps S201 to S204) in the same manner as in the above-mentioned embodiment. In the second process, the unit controller 15 can control the gate motor 39b to start opening the gate 39a, instead of starting the arm motor 38 (step S209). That is, the unit controller 15 can start the first preparatory action before the contact action is completed. The unit control unit 15 can also control the gate unit 39 so that the gate unit 39 ends opening (step S210) before the contact action of the package P is completed (the above-mentioned step S207). The unit control unit 15 can also control the arm motor 38 to raise the suction port 36c after the contact action is completed (step S211). Through such control, it is possible to avoid the suction port 36c from reaching the suction position before the contact action is completed. Therefore, even in a state where negative pressure is generated in the suction port 36c, it is possible to suppress the movement of the yarn end Ye due to the negative pressure before the package P performs the contact action.

[0116] (2) In the above-mentioned embodiment, one of the first preparatory action and the second preparatory action is started before the contact action is completed. In addition, the other of the first preparatory action and the second preparatory action is started after the contact action is completed. However, this is not limited to this. Fig.11 Another control example is described with reference to the flowchart of FIG. Fig.11 is a flowchart showing the details of step S102 in this variation. Fig.11As shown, the unit control unit 15 performs the first process (the above-mentioned steps S201 to S204) in the same manner as in the above-mentioned embodiment. In the second process, the unit control unit 15 may also start the suction port 36c to rise (the above-mentioned step S205), and then start opening the gate 39a (the above-mentioned step S209). That is, the unit control unit 15 may start both the first preparation action and the second preparation action before completing the contact action. The order of steps S205 and S209 may be opposite to that described above. Alternatively, the unit control unit 15 may also start steps S205 and S209 at approximately the same time. The unit control unit 15 may also complete the rise of the suction port 36c (step S212) and end opening the gate 39a (step S213) after completing the contact action of the package P (the above-mentioned step S207). That is, the unit control unit 15 may also operate the upper yarn catching guide 36 and the gate unit 39 in such a manner that the first preparation action and the second preparation action are completed after the contact action is completed. Alternatively, the unit control unit 15 may complete the first preparatory action before the contact action is completed. The order of step S212 and step S213 may be reversed to the above. Alternatively, the unit control unit 15 may start the first preparatory action and the second preparatory action at a time when step S212 and step S213 occur substantially at the same time. As described above, the unit control unit 15 operates the upper yarn catching guide 36 and the gate 39 so that at least a part of the preparatory action starts before the contact action is completed, and the preparatory action is completely completed after the contact action is completed.

[0117] (3) In the above-mentioned embodiment, the preparation action includes the first preparation action and the second preparation action. The preparation action may also include other actions. For example, the automatic winder 1 has a negative pressure source 102 shared by a plurality of yarn winding units 2 (see Figure 4 ). In addition to the negative pressure source 102, or instead of the negative pressure source 102, a separate negative pressure source (not shown) may be provided corresponding to each yarn winding unit 2. For example, in the direction of air flow, a separate negative pressure source may be arranged between the negative pressure source 102 and the gate portion 39. The separate negative pressure source may be, for example, a known blower device. The blower device may also work when a negative pressure is generated at the suction port 36c of the corresponding yarn winding unit 2, and stop working when a negative pressure is not generated at the suction port 36c. The unit control unit 15 may, for example, control the on and off of the power supply of the blower device. The on and off action of the blower device may also be included in the preparation action. In this embodiment, the opening and closing action of the gate portion 39 may also be replaced by the on and off switching action of the blower device.

[0118] (4)Reference Fig.12 (a) and Fig.12 (b) of the present invention will now describe another variation. Fig.12(a) and Fig.12 As shown in (b), the yarn winding unit 2 may also have an upper yarn catching guide portion 60 instead of the above-mentioned upper yarn catching guide portion 36. The upper yarn catching guide portion 60 is connected to the end portion of the upstream side of the fluid passage 101a in the flow direction of the air, for example. An opening 101b is formed at the upstream end portion of the fluid passage 101a in the flow direction. The upper yarn catching guide portion 60 may also have the above-mentioned shaft 36a, arm 36b and suction port 36c. And, for example, an opening and closing portion 61 may also be provided at the base end portion of the arm 36b. The opening and closing portion 61 may also be configured to be able to rotate integrally with the arm 36b. That is, the opening and closing portion 61 may also be configured to be able to move in conjunction with the arm motor 38. The opening and closing portion 61 may also have a cover 62a and an opening 62b. The cover 62a is configured to be able to open and close the opening 101b. The cover 62a is arranged at a part of the rotation circumference of the opening and closing portion 61. The opening 62b is arranged at a position different from the cover 62a in the rotation circumferential direction of the opening and closing portion 61. Fig.12 As shown in (a), for example, when the suction port 36c is in the standby position, the cover 62a blocks the opening 101b (i.e., closes the fluid passage 101a). When the suction port 36c moves from the standby position to the suction position, the state where the cover 62a blocks the opening 101b is released. In other words, Fig.12 As shown in (b), when the suction port 36c is located at the suction position, the suction port 36c is connected to the fluid passage 101a via the opening 62b. That is, when the suction port 36c is located at the suction position, the opening 101b is in an open state. In this way, the opening and closing portion 61 is configured to make the fluid passage 101a in an open state when the suction port 36c is located at the suction position. In this modification, the preparation action includes a movement action of the arm motor 38 to move the suction port 36c from the standby position to the suction position. In the third control, the unit controller 15 can cause the arm motor 38 to operate so that the movement action starts before the contact action is completed, and the movement action is completed after the contact action is completed. Thereby, it is possible to avoid the suction port 36c from reaching the suction position before the contact action is completed, and it is possible to suppress the generation of a strong negative pressure at the suction port 36c before the contact action is completed. As a structure similar to the opening and closing portion 61, for example, refer to the sliding tool (not shown) recorded in the Japanese Utility Model Publication No. 57-30255.

[0119] (5) In the above-mentioned embodiment, the package P is raised and lowered relative to the traverse drum 42 by the lifting mechanism 44. However, the present invention is not limited thereto. For example, the traverse drum 42 may be configured to be movable relative to the package P. In other words, as long as the package P and the traverse drum 42 are configured to be movable relative to each other, either or both of the package P and the traverse drum 42 may be movable.

[0120] (6) In the above-mentioned embodiment, the yarn Y is transversely moved by the transverse roller 42. However, it is not limited to this. The winding section 13 may also include, for example, a transverse guide not shown in the figure and a roller not shown in the figure instead of the transverse roller 42. The transverse guide may also be provided separately from the roller. The transverse guide may, for example, be configured to be mounted on the top end of an arm that is driven and swung by a motor not shown in the figure, and to be able to reciprocate in the left and right directions. Alternatively, the transverse guide may be mounted on an endless belt instead of the arm. The transverse guide may also be configured to be able to reciprocate by driving the endless belt reciprocally within a prescribed range. The roller contacts the surface Pa of the package P and rotates together with the package P. The roller is equivalent to the contact roller of the present invention. The roller may also cause the package P to rotate in the same way as the transverse roller 42. Alternatively, the package P may also be driven and rotated by a motor not shown in the figure. That is, the roller may also be configured to rotate in a slave manner to the package P.

[0121] (7) In the above-mentioned embodiment, the unit control section 15 controls the yarn winding unit 2. However, this is not limiting. For example, the machine control device 4 may be configured to be able to control a plurality of yarn winding units 2. In this case, the machine control device 4 is equivalent to the control section of the present invention, and the automatic winder 1 is equivalent to the yarn winding machine of the present invention.

[0122] (8) The present invention is applicable not only to the automatic winder 1 but also to a known air spinning machine, an open-end spinning machine (not shown), and the like.

Claims

1. A yarn winding machine, comprising: a yarn supplying section capable of supplying yarn; a winding section that performs a winding operation in which the yarn supplied from the yarn supplying section is wound to form a package; a yarn connecting mechanism that connects the disconnected yarn when the yarn is disconnected between the yarn supplying section and the winding section; and a control section, characterized in that The winding portion has: a contact roller which contacts the surface of the package and rotates together with the package; as well as a lifting mechanism capable of performing a separation action of separating the surface of the package and the outer peripheral surface of the contact roller from each other, and a contact action of bringing the surface of the package and the outer peripheral surface of the contact roller closer to each other and into contact with each other, The yarn connecting mechanism comprises: A suction and drawing mechanism capable of performing a suction and drawing action, in which the yarn end of the winding portion side of the disconnected yarn is sucked and captured by a suction port, and the yarn end is drawn out from the package rotating in a direction opposite to that during the winding action, The control unit is configured to be able to perform the following control: a first control for causing the lifting mechanism to perform the separation action when the yarn is disconnected between the yarn supplying section and the winding section; a second control, causing the lifting mechanism to perform the contact action after the first control; as well as The third control causes the suction and extraction mechanism to perform a predetermined preparatory action, wherein the preparatory action is used to enable the suction and extraction action to start. In the third control, the suction and extraction mechanism is operated so that the preparatory operation is started before the contact operation is completed by the second control and the preparatory operation is completed after the contact operation is completed.

2. The yarn winding machine according to claim 1, characterized in that The control section executes the third control when the traveling yarn is broken when the control section controls the winding section to increase the circumferential speed of the package.

3. The yarn winding machine according to claim 1 or 2, characterized in that: The suction and extraction mechanism comprises: a fluid passage connecting the suction port and a suction source for generating negative pressure at the suction port; and a gate portion configured to open and close the fluid passage, The preparatory action includes a first preparatory action in which the gate portion opens the fluid passage. In the third control, the control unit operates the shutter unit so that the first preparatory operation is completed after the contact operation is completed.

4. The yarn winding machine according to any one of claims 1 to 3, characterized in that: The suction and extraction mechanism comprises: a moving mechanism for moving the suction port between a predetermined standby position and a suction position closer to the package than the standby position and for sucking the yarn end, The preparatory action includes a second preparatory action in which the moving mechanism moves the suction port from the standby position to the suction position, In the third control, the control unit operates the moving mechanism so that the second preparatory operation is completed after the contact operation is completed.

5. The yarn winding machine according to claim 1 or 2, characterized in that: The suction and extraction mechanism comprises: a moving mechanism that moves the suction port between a predetermined standby position and a suction position that is closer to the package than the standby position and is used to suck the yarn end; a fluid passage connecting the suction port and a suction source for generating negative pressure at the suction port; as well as an opening and closing portion, which is configured to be linked with the moving mechanism, to close the fluid passage when the suction port is located at the standby position, and to open the fluid passage when the suction port is located at the suction position, The preparation operation includes a movement operation of moving the suction port from the standby position to the suction position, In the third control, the control unit operates the moving mechanism so that the moving operation is completed after the contact operation is completed.

6. The yarn winding machine according to any one of claims 1 to 5, characterized in that: The contact roller has a traverse groove formed on the outer peripheral surface of the contact roller for traversing the running yarn.

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