Unwinding device

Abstract

The present invention provides a wire winding device capable of automatically inserting the wire into the corner of the spool housing. After the wire (S) is wound onto the spool (30) by the winding mechanism (101), the control unit (500) rotates the wire-hanging rotating plate (120) of the engaging mechanism (102) to engage the engaging groove (131) with the wire (S) pulled out from the spool housing (10), and moves the spool housing (10) by the spool housing gripping mechanism (200), thereby causing the wire (S) to enter the insertion path (22) to the corner (20) and be inserted into the wire insertion hole (21).

Description

Technical Field

[0001] This invention relates to a winding device for unwinding unwinding wires on an online shaft. Background Technology

[0002] In sewing machines and the like that use upper and lower threads for sewing, there is an automatic thread supply device capable of automatically performing tasks such as removing excess thread, winding lower thread, hanging thread, cutting thread, and changing the spool housing. This automatic thread supply device includes a lower thread winding device that inserts lower thread from a lower thread supply source through an opening in the spool housing, causing the spool to rotate, thereby winding the lower thread onto the spool within the spool housing (for example, see Patent Document 1). This lower thread winding device is installed in the automatic thread supply device of a full-rotation rotary sewing machine that rotates the spool containing the spool in one direction.

[0003] Patent Document 1: Japanese Patent Application Publication No. 9-56949

[0004] In addition, in a semi-rotary pot-type sewing machine that oscillates the pot containing the bobbin, a bobbin housing with corners is used, and the thread pulled out from the bobbin housing is supplied through a thread insertion hole at the front end of the corner.

[0005] The thread winding device used in the automatic thread supply system of the aforementioned full-rotation rotary sewing machine has difficulty guiding the thread pulled from the spool housing through the corner thread insertion hole. Therefore, in semi-rotation rotary sewing machines using spool housings with corners, the thread must be wound manually onto the spool, which requires considerable effort. Summary of the Invention

[0006] The present invention was made in view of the above circumstances, and its object is to provide a lower wire winding device capable of automatically inserting the lower wire into the corner of the spool housing.

[0007] To achieve the above objectives, the thread winding device of the present invention winds the thread around a bobbin housing for a semi-rotary rotary sewing machine, the bobbin having a corner portion having a thread insertion hole for inserting the thread pulled out from the bobbin housed inside, and an insertion path communicating with the thread insertion hole.

[0008] The unwinding device has the following features:

[0009] A supply mechanism that feeds the lower wire into the spool;

[0010] A winding mechanism that rotates the spool to wind the lower wire;

[0011] A bobbin housing gripping mechanism grips the bobbin housing and moves it along the rotation axis of the bobbin while gripping the bobbin housing;

[0012] A locking mechanism comprising a wire-hanging rotating plate rotatably disposed around the spool housing, having a locking groove capable of engaging with the lower wire pulled out from the spool housing; and

[0013] The control unit controls the driving of each of the supply mechanism, the winding mechanism, the bobbin housing gripping mechanism, and the engaging mechanism.

[0014] After the lower wire is wound onto the spool by the winding mechanism, the control unit...

[0015] The locking mechanism rotates the hanging plate to engage the locking groove with the lower wire pulled out from the spool housing, and the spool housing is moved by the spool housing gripping mechanism, thereby allowing the lower wire to enter the insertion path at the corner and be inserted into the wire insertion hole.

[0016] The thread winding device according to this structure can wind the thread onto the spool of a semi-rotary rotary sewing machine, and then pass the thread through the thread insertion hole at the corner of the spool housing. Therefore, it can be appropriately used as a thread winding device for automatically winding the thread onto the spool in a semi-rotary rotary sewing machine using a spool housing with a corner.

[0017] In the unwinding device of the present invention

[0018] It may have a retaining mechanism, which is capable of pivoting a wire retaining plate, the wire retaining plate having a retaining groove capable of retaining the lower wire.

[0019] When the control unit engages the lower wire via the engaging groove of the wire-hanging rotating plate of the engaging mechanism,

[0020] The drive of the retaining mechanism is controlled by swinging the wire retaining plate so that the retaining groove holds the lower wire from the opposite side of the engaging groove.

[0021] According to the unwinding device of this structure, the unwinding wire that engages with the engagement groove of the wire-hanging rotating plate of the engagement mechanism is held from the opposite side in the holding groove of the wire holding plate, thereby allowing the unwinding wire to be guided more smoothly through the insertion path to the wire insertion hole at the corner.

[0022] In the unwinding device of the present invention, the corner portion can be folded back by rounding the front end and docking with the root portion, thereby forming the wire insertion hole, and the insertion path is provided at the abutment portion of the root portion and the folded-back portion.

[0023] According to the unwinding device of this structure, if the unwinding wire is engaged with the engaging groove of the hanging rotating plate and the spool housing is moved, the unwinding wire bites into the insertion path of the folded-back portion at the front end of the corner and the abutting portion at the root. The folded-back portion at the corner then elastically deforms, expanding the insertion path to allow the unwinding wire to pass through. Thus, the unwinding wire can be easily guided into the wire insertion hole via the insertion path at the corner. Furthermore, after the unwinding wire passes through the insertion path into the wire insertion hole, the elastically deformed folded-back portion at the corner returns, narrowing the insertion path, thereby preventing the unwinding wire from detaching from the insertion path as it passes through the wire insertion hole.

[0024] In the unwinding device of the present invention, the bobbin housing may have the corner portion, the corner portion having the insertion path formed by the gap between the recesses and protrusions that enter each other.

[0025] According to the unwinding device with this structure, if the unwinding wire is engaged with the engaging groove of the wire-hanging rotating plate and the spool housing is moved, the unwinding wire can be easily guided into the wire insertion hole through the insertion path formed by the gap between the concave and convex portions. Furthermore, since the insertion path is formed by the gap between the concave and convex portions that intersect each other, it can prevent the unwinding wire from detaching from the insertion path as it passes through the wire insertion hole.

[0026] In the unwinding device of the present invention, the bobbin housing may have a corner portion having a movable rod capable of swinging, thereby opening and closing the insertion path by swinging the movable rod.

[0027] According to the unwinding device of this structure, if the unwinding wire is engaged with the engaging groove of the hanging rotating plate and the spool housing is moved, the movable rod swings, thereby easily guiding the unwinding wire into the wire insertion hole through the disconnected insertion path. Furthermore, if the movable rod swings in the opposite direction, the insertion path closes, thereby preventing the unwinding wire passing through the wire insertion hole from detaching from the insertion path.

[0028] The unwinding device of the present invention further includes a fixed cutter section, which connects with a movable cutter section provided on the rotating wire-hanging rotating plate, thereby cutting the unwinding wire passing between the fixed cutter section and the movable cutter section. On the wire-hanging rotating plate, a first wire-hanging V-groove and a second wire-hanging V-groove are formed on the side opposite to the side where the engaging groove is provided in the rotational direction. The first wire-hanging V-groove is formed at a position where the unwinding wire passes through the insertion path of the corner portion of the spool housing, and the second wire-hanging V-groove is formed at a position where the unwinding wire is not inserted into the corner portion of the spool housing. The insertion path is the position through which the lower wire passes. The movable cutter is located at the front end of the first hanging wire V-groove. When the lower wire is inserted into the insertion path at the corner of the spool housing, the lower wire is guided from the first hanging wire V-groove to the movable cutter, and is cut by the movable cutter and the fixed cutter. When the lower wire is not inserted into the insertion path at the corner of the spool housing, the lower wire is guided from the second hanging wire V-groove to a position in the hanging wire rotating plate that is different from the movable cutter, and is not cut by the movable cutter and the fixed cutter.

[0029] The unwinding device with this structure can prevent the unwinding wire from being cut by the movable cutter and the fixed cutter even when the unwinding wire is not hooked to the corner of the spool housing. Therefore, the recovery action after detecting this state by a sensor or the like becomes easy.

[0030] The unwinding device of the present invention may have a sensor that monitors the supply of the unwinding wire. If the sensor detects that the unwinding wire is not inserted into the corner of the spool housing, the unwinding wire is re-entered into the insertion path of the corner and inserted into the wire insertion hole to perform wire cutting.

[0031] The effects of the invention

[0032] According to the present invention, a lower wire winding device is provided that can automatically insert the lower wire into the corner of the spool housing. Attached Figure Description

[0033] Figure 1 It is a perspective view and enlarged view of the corner of the spool housing.

[0034] Figure 2 This is a perspective view showing the spool housing and the spool itself.

[0035] Figure 3 This is a perspective view of the unwinding device according to this embodiment.

[0036] Figure 4 This is a perspective view of the winding section of the lower winding device.

[0037] Figure 5 The diagram shows the wire-hanging rotating plate installed in the locking mechanism that constitutes the winding section. (a) and (b) are oblique views viewed from different directions, respectively.

[0038] Figure 6 This is a perspective view of the unwinding device used to illustrate the winding process.

[0039] Figure 7 This is a perspective view of the winding device used to explain the spring hooking process.

[0040] Figure 8 This is a perspective view of the winding device used to explain the spring hooking process.

[0041] Figure 9 This is a perspective view of the winding section of the lower winding device, which explains the spring hook process.

[0042] Figure 10 This is a perspective view of the winding device used to explain the spring hooking process.

[0043] Figure 11 This is an oblique view of the lower winding device, which explains the spring hook process, viewed from below the winding section.

[0044] Figure 12 This is an oblique view of the lower winding device, which explains the spring hook process, viewed from below the winding section.

[0045] Figure 13 This is a perspective view of the winding section of the lower winding device, which explains the spring hook process.

[0046] Figure 14 This is a perspective view of the lower winding device used to illustrate the threading process.

[0047] Figure 15 This is a perspective view of the winding section of the lower winding device, which explains the threading process.

[0048] Figure 16 This is a perspective view of the winding section of the lower winding device, which explains the threading process.

[0049] Figure 17 This is a perspective view of the winding section of the lower winding device, which explains the threading process.

[0050] Figure 18 This is a perspective view of the corner involved in variation example 1.

[0051] Figure 19 The diagrams illustrate the corners involved in variation example 1. (a) is a side view, and (b) is a front view.

[0052] Figure 20 This is a perspective view of the corner involved in variation example 2.

[0053] Figure 21 The diagrams illustrate the corner involved in variation example 2. (a) is a side view of the closed insertion path, and (b) is a side view of the open insertion path.

[0054] Figure 22 This is a perspective view, an enlarged view of the corner, and a sectional view of the front end of the corner, representing another example of a spool housing.

[0055] Figure 23 These are oblique views, enlarged views of the corners, and sectional views of the front end of the corners, representing other examples of spool housings.

[0056] Figure 24 The figures show other examples of a wire-hanging rotating plate installed in the engagement mechanism that constitutes the wire winding section. (a) is a front view, and (b) is an oblique view.

[0057] Figure 25 (a) is a diagram showing the state in which the unwound thread is hooked on the corner of the spool housing during the threading process, and (b) is a diagram showing the state in which the unwound thread is not hooked on the corner of the spool housing during the threading process. Detailed Implementation

[0058] Hereinafter, examples of embodiments of the present invention will be described with reference to the accompanying drawings.

[0059] First, the bobbin and bobbin housing for winding the lower wire using the lower wire winding device according to this embodiment will be described.

[0060] Figure 1 It is a perspective view and enlarged view of the corner of the spool housing. Figure 2 This is a perspective view showing the spool housing and the spool itself.

[0061] like Figure 1 and Figure 2 As shown, the bobbin housing 10 has a front surface portion 11 and a peripheral wall portion 12, and internally houses the bobbin 30. This bobbin housing 10 is used in a semi-rotary pot-type sewing machine that oscillates the pot, and has a corner portion 20 at the front end for hooking the lower thread S.

[0062] The spool housing 10 is made of metal, for example. The peripheral wall portion 12 of the spool housing 10 is formed in a cylindrical shape, and one end of the peripheral wall portion 12 is closed by the front surface portion 11, forming a concave shape that is open on the opposite side of the front surface portion 11. The spool housing 10 can accommodate the spool 20 from the opposite side of its front surface portion 11.

[0063] The bobbin 30 housed in the bobbin housing 10 has: a cylindrical portion 31 into which the support shaft of the sewing machine's spool is inserted; and flange portions 32 disposed at both ends of the cylindrical portion 31, having equal outer diameters, with the lower thread S wound around the outer periphery of the cylindrical portion 31 between the flange portions 32. Furthermore, clutch holes 33 are formed at two locations on opposite sides of the central shaft in the flange portions 32.

[0064] The peripheral wall portion 12 of the spool housing 10 has a wire extraction hole 15. This wire extraction hole 15 is connected to a slit 16 that cuts into the edge of the peripheral wall portion 12. Furthermore, when the spool 20 is housed inside the spool housing 10, the undrawn wire S pulled from the spool 30 is guided through the slit 16 to the wire extraction hole 15. Additionally, an opening 17 is formed in the peripheral wall portion 12 of the spool housing 10, which cuts into the edge of the spool and reaches the vicinity of the wire extraction hole 15.

[0065] A wire adjuster spring 18 is mounted on the peripheral wall portion 12 of the spool housing 10. The wire adjuster spring 18 is bent along the circumferential surface of the peripheral wall portion 12 and is mounted thereto block the wire extraction hole 15 from the outside. Thus, the lower wire S extracted from the wire extraction hole 15 is clamped between the peripheral wall portion 12 and the wire adjuster spring 18, and is tensioned by the sliding resistance generated by its clamping pressure.

[0066] The online adjuster spring 18 is provided with an adjusting screw 19, which is screwed into a screw hole formed in the peripheral wall portion 12. Moreover, by adjusting the screwing depth of the adjusting screw 19, the gap between the peripheral wall portion 12 and the online adjuster spring 18 is adjusted, thereby changing the clamping pressure.

[0067] The corner portion 20 of the spool housing 10 is formed in a rod shape and extends radially outward, with its front end positioned opposite the pull-out position of the lower wire S from the peripheral wall portion 12. A wire insertion hole 21 is formed at the front end of the corner portion 20, through which the lower wire S pulled out from the peripheral wall portion 12 can be inserted. The wire insertion hole 21 is formed into a rounded shape by rounding the front end of the corner portion 20 and engaging with the root portion. The abutment portion between the root portion of the corner portion 20 and the end of the rounded portion is provided as an insertion path 22. The lower wire S is engaged from the outside of the wire insertion hole 21 through the insertion path 22, thereby elastically deforming and expanding to allow the lower wire S to pass through. Moreover, through the insertion path 22, the lower wire S can be inserted into the wire insertion hole 21.

[0068] Next, the thread winding device for winding the thread S onto the spool 30 housed in the spool housing 10 of the semi-rotary kettle sewing machine described above will be explained.

[0069] Figure 3 This is a perspective view of the unwinding device according to this embodiment. Figure 4This is a perspective view of the winding section of the lower winding device. Figure 5 The diagram shows the wire-hanging rotating plate installed in the locking mechanism that constitutes the winding section. (a) and (b) are oblique views viewed from different directions, respectively.

[0070] like Figure 3 As shown, the unwinding device 1 according to this embodiment has a winding section 100. This winding section 100 includes a winding mechanism 101 and a locking mechanism 102. Additionally, the unwinding device 1 includes a spool housing gripping mechanism 200, a holding mechanism 300, and a supply mechanism 400. These winding section 100, spool housing gripping mechanism 200, holding mechanism 300, and supply mechanism 400 are assembled on a base plate 40. Furthermore, the unwinding device 1 includes a control unit 500. This control unit 500 controls the driving of the winding mechanism 101, locking mechanism 102, spool housing gripping mechanism 200, holding mechanism 300, and supply mechanism 400.

[0071] like Figure 3 and Figure 4 As shown, the winding mechanism 101 of the winding section 100 has a winding shaft 110. A clutch plate 111 is provided at its front end of the winding shaft 110. The clutch plate 111 has an engaging protrusion 112 that engages with the cylindrical portion 31 of the spool 30 and a clutch protrusion 113 that engages with the clutch hole 33 of the flange portion 32. Thus, the engaging protrusion 112 and the clutch protrusion 113 of the clutch plate 111 engage with the cylindrical portion 31 and the clutch hole 33 of the spool 30, thereby engaging with the spool 30.

[0072] The winding shaft 110 has a pulley 116 at its rear end with a drive belt 115 hooked onto it. The drive belt 115 is hooked onto the drive pulley 118 of the spool rotation motor 117, transmitting the rotational power of the spool rotation motor 117 from the drive pulley 118 to the pulley 116. Thus, the winding shaft 110 rotates via the spool rotation motor 117.

[0073] The engagement mechanism 102 of the winding section 100 includes a wire-hanging rotating plate 120. This rotating plate 120 is constructed of a plate bent into an arc shape, with its rear end fixed to a pulley 121. The pulley 121 is rotatable about a center coaxial with the winding shaft 110, and a drive belt 122 is hooked onto it. The drive belt 122 is hooked onto the drive pulley 124 of the wire-hanging rotating motor 123, transmitting the rotational power of the motor 123 from the drive pulley 124 to the pulley 121. Thus, the wire-hanging rotating plate 120 rotates along the outer circumference of the winding shaft 110 via the wire-hanging rotating motor 123.

[0074] like Figure 5As shown in (a) and (b), the wire-hanging rotating plate 120 has an engaging groove 131 and a wire-hanging groove 132 on one side. In addition, the wire-hanging rotating plate 120 has a wire-hanging V-groove 133 and a movable cutter 134 on the other side (the side opposite to the side in the rotation direction of the wire-hanging rotating plate 120 where the engaging groove 131 and the wire-hanging groove 132 are formed).

[0075] like Figure 4 As shown, the winding section 100 has a fixed cutter section 135. The fixed cutter section 135 is connected to the movable cutter section 134 of the rotating hanging plate 120, thereby cutting the lower wire S passing between the movable cutter section 134 and the fixed cutter section 135.

[0076] like Figure 3 As shown, the spool housing gripping mechanism 200 includes a chuck 210 for gripping the spool housing 10. This chuck 210 is opened and closed, for example, by a cylinder 211 driven by an air supply, to grip and release the spool housing 10. The chuck 210 is mounted on an arm 213 supported by a rod 212. The rod 212 is supported on a base plate 40, and the arm 213 is movable along the length of the rod 212. Thus, the chuck 210 mounted on the arm 213 can move in a direction relative to the winding section 100, approaching and separating from it. The arm 213 is connected via a connecting member 215 to a drive belt 218 hooked onto a driven pulley 216 and a drive pulley 217. The drive pulley 217 is mounted on the drive shaft of a chuck movement motor 219. Thus, the chuck movement motor 219 is driven, and the drive belt 218 moves, thereby moving the chuck 210 in a direction relative to the winding section 100, approaching and separating from it.

[0077] A holding mechanism 300 is disposed below the winding section 100. This holding mechanism 300 has a wire holding arm 310. The wire holding arm 310 is constructed of a plate body and has a holding groove 311 formed at its upper end. The lower end of the wire holding arm 310 is rotatably connected to a frame 312 fixed to the base plate 40. Furthermore, the middle portion of the wire holding arm 310 is connected to a solenoid 313 fixed to the base plate 40. Moreover, when the solenoid 313 is driven, the middle portion moves in a direction relative to the base plate 40, moving towards and away from it, thereby causing the wire holding arm 310 to rotate about its connection point with the frame 312. Thus, the holding groove 311 of the wire holding arm 310 moves between a retracted position separated from the spool housing 10 and a wire holding position close to the spool housing 10.

[0078] The supply mechanism 400 has a wire supply nozzle 410, the rear end of which is connected to a wire supply block 411. The wire supply block 411 is fixed to a pulley 412 rotatably supported on a base plate 40, and a drive belt 413 is hooked onto the pulley 412. The drive belt 413 is hooked onto a drive pulley 415 of a supply nozzle rotation motor 414, transmitting the rotational force of the supply nozzle rotation motor 414 from the drive pulley 415 to the pulley 412. Thus, the wire supply block 411, to which the wire supply nozzle 410 is fixed, rotates via the supply nozzle rotation motor 414. Consequently, the front end of the wire supply nozzle 410 moves between a retracted position separated from the spool housing 10 and a wire supply position close to the spool housing 10.

[0079] The online supply block 411 forms an air supply path 417 that communicates with the line supply nozzle 410. Additionally, the online supply block 411 forms a line supply path 418, which communicates with the air supply path 417 within the online supply block 411. Air is supplied to the air supply path 417 from an air supply source such as a compressor (not shown), and a lower line S is supplied to the line supply path 418.

[0080] In the supply mechanism 400, the lower wire S supplied to the wire supply path 418 is fed into the wire supply nozzle 410 by air supplied to the air supply path 417, and is then discharged from the front end of the wire supply nozzle 410. Moreover, with the front end of the wire supply nozzle 410 positioned in a wire supply position close to the spool housing 10, the lower wire S is discharged from the front end of the wire supply nozzle 410, thereby winding the lower wire S onto the spool 30 mounted on the winding section 100.

[0081] Next, the control of the winding operation of the unwinding S-direction bobbin 30 in the unwinding winding device 1 with the above structure will be explained.

[0082] Figures 6-17 This is a process diagram showing the winding operation of the lower S-axis bobbin 30. Furthermore, in each diagram, the distal end is indicated by arrow A, the proximal end by arrow B, clockwise by arrow R1, and counterclockwise by arrow R2.

[0083] (Thread winding process)

[0084] like Figure 6 As shown, the chuck 210 of the spool housing gripping mechanism 200, which grips the spool housing 10, is moved in a direction closer to the winding section 100, i.e., the distal side (arrow A direction), so that the spool 30 inside the spool housing 10 engages with the clutch plate 111 of the winding mechanism 101. Additionally, the wire supply block 411 of the supply mechanism 400 is rotated counterclockwise (arrow R2 direction) so that the front end of the wire supply nozzle 410 is positioned at a wire supply position close to the spool housing 10.

[0085] In this state, while feeding the lower wire S from the front end of the wire supply nozzle 410, the winding shaft 110 of the winding mechanism 101 is rotated clockwise (arrow R1 direction) in the winding direction. Thus, the lower wire S is fed into the spool 30 through the opening 17 of the spool housing 10, and the lower wire S is wound around the cylindrical portion 31 of the spool 30. After winding the lower wire S to the spool 30 to the set length, the rotation of the winding shaft 110 is stopped, and the winding process ends.

[0086] (Spring hook hanging process)

[0087] like Figure 7 As shown, the wire supply block 411 of the supply mechanism 400 is rotated clockwise (in the direction of arrow R1), thereby moving the front end of the wire supply nozzle 410 to the retracted position. This tensions the lower wire S between the spool 30 and the front end of the wire supply nozzle 410. Furthermore, the wire-hanging rotating plate 120 of the engaging mechanism 102 is rotated clockwise (in the direction of arrow R1), causing the lower wire S to engage with the wire-hanging V-groove 133 of the rotating plate 120 and be lifted. This retracts the lower wire S from above the holding mechanism 300.

[0088] like Figure 8 As shown, the solenoid 313 of the holding mechanism 300 is pulled in, thereby causing the wire holding arm 310 to swing, positioning the holding groove 311 of the wire holding arm 310 in a wire holding position close to the spool housing 10. Furthermore, the chuck 210 of the spool housing gripping mechanism 200 is moved to the distal end (in the direction of arrow A). Additionally, as... Figure 9 As shown, if the wire-hanging rotating plate 120 of the engaging mechanism 102 is rotated counterclockwise (in the direction of arrow R2), the lower wire S disengages from the wire-hanging groove 133 and remains within the retaining groove 311 of the wire retaining arm 310. Furthermore, if the wire-hanging rotating plate 120 is rotated counterclockwise (in the direction of arrow R2), the lower wire S pulled from the spool housing 10 engages with the wire-hanging groove 132 of the wire-hanging rotating plate 120. Figure 10 The diagram shows the state after the hanging plate 120 is rotated counterclockwise (in the direction of arrow R2) for about one full turn with the lower wire S locked to the hanging slot 132.

[0089] like Figure 11 As shown, the chuck 210 of the spool housing gripping mechanism 200 is moved towards the proximal end (in the direction of arrow B). As a result, while locked in the hook groove 132, the lower wire S pulled out from the spool housing 10 is guided toward the slit 16 of the spool housing 10, where it is hooked.

[0090] In this state, such as Figure 12As shown, after the chuck 210 of the spool housing gripping mechanism 200 moves to the distal end (in the direction of arrow A), the wire-hanging rotating plate 120 of the engaging mechanism 102 rotates clockwise (in the direction of arrow R1). As a result, the lower wire S disengages from the wire-hanging groove 132 of the wire-hanging rotating plate 120. Furthermore, the lower wire S is restricted in its inclined movement along the slit 16.

[0091] In this state, if the hanging wire rotating plate 120 is rotated further clockwise (in the direction of arrow R1), then as follows: Figure 13 As shown, the lower wire S is lifted by engaging with the hanging V-groove 133 of the hanging rotating plate 120, which rotates clockwise (in the direction of arrow R1), and moves obliquely along the slit 16 into the space between the peripheral wall 12 of the spool housing 10 and the wire adjuster spring 18. Furthermore, the lower wire S moves towards the wire extraction hole 15 of the spool housing 10 (see reference). Figure 2 Guided by the spool housing 10, the spool passes between the peripheral wall 12 and the spool adjuster spring 18 and is pulled out from near the opening 17.

[0092] (Threading process)

[0093] like Figure 14 As shown, the hook-up rotating plate 120 of the engaging mechanism 102 is rotated counterclockwise (in the direction of arrow R2) to disengage the lower wire S from the hook-up V groove 133, and the wire supply block 411 is rotated clockwise (in the direction of arrow R1) to pull the front end of the wire supply nozzle 410 away from the winding section 100, thereby setting the lower wire S to a tensioned state. Thus, as... Figure 15 As shown, the lower line S pulled out from the spool housing 10 is hooked onto the corner portion 20 and hooked onto the retaining groove 311 of the line retaining arm 310.

[0094] like Figure 16 As shown, the wire-hanging rotating plate 120 of the engaging mechanism 102 is rotated further counterclockwise (in the direction of arrow R2), thereby engaging the engaging groove 131 of the wire-hanging rotating plate 120 from above relative to the lower wire S. Thus, the lower wire S engages with the corner 20 of the spool housing 10 and with one wall portion 131a of the engaging groove 131, thus restricting its movement towards the proximal end (in the direction of arrow B).

[0095] In this state, such as Figure 17 As shown, the chuck 210 of the spool housing gripping mechanism 200 moves towards the proximal end (in the direction of arrow B). Consequently, the lower wire S, whose movement towards the proximal end (in the direction of arrow B) is restricted, causes the spool housing 10 to move towards the proximal end (in the direction of arrow B), thereby engaging the lower wire S, which is engaged with the corner 20, into the insertion path 22 of the corner 20, and then passing through this insertion path 22 into the wire insertion hole 21.

[0096] Then, the wire-hanging rotating plate 120 of the locking mechanism 102 rotates clockwise. As a result, the lower wire S pulled out from the wire insertion hole 21 of the corner 20 is hooked onto the wire-hanging V groove 133 of the wire-hanging rotating plate 120, and the wire-hanging rotating plate 120 continues to rotate clockwise, cutting the lower wire S through the movable cutter 134 and the fixed cutter part 135.

[0097] As described above, according to the thread winding device 1 of this embodiment, the lower thread S is wound onto the spool 30, and then the lower thread S can pass through the thread insertion hole 21 of the corner portion 20 of the spool housing 10. Therefore, in a semi-rotary rotary sewing machine using a spool housing 10 having a corner portion 20, the lower thread winding device that automatically winds the lower thread S onto the spool 30 can be appropriately used.

[0098] Furthermore, the unwinding device 1 according to this embodiment includes a holding mechanism 300, which is oscillatingly equipped with a wire holding plate 310 having a holding groove 311 for holding the unwinding wire S. Moreover, when the unwinding wire S is engaged by the engaging groove 131 of the wire-hanging rotating plate 120 of the engaging mechanism 102, the control unit 500 oscillates the wire holding plate 310 to control the drive of the holding mechanism 300 so that the holding groove 311 holds the unwinding wire S from the opposite side of the engaging groove 131. Therefore, the unwinding wire S engaged with the engaging groove 131 of the wire-hanging rotating plate 120 of the engaging mechanism 102 is held from the opposite side in the holding groove 311 of the wire holding plate 310, thereby allowing the unwinding wire S to be guided more smoothly through the insertion path 22 to the wire insertion hole 21 of the corner 20.

[0099] Furthermore, the corner portion 20 of the spool housing 10 is folded back with a rounded front end and mates with the root portion, thereby forming a wire insertion hole 21. A insertion path 22 is provided at the abutment of the root portion and the folded-back portion. Therefore, when the lower wire S is engaged in the insertion path 22 at the abutment of the folded-back portion at the front end of the corner portion 20 and the root portion, the folded-back portion of the corner portion 20 elastically deforms, and the insertion path 22 expands, allowing the lower wire S to pass through. Thus, the lower wire S can be easily guided to the wire insertion hole 21 through the insertion path 22 of the corner portion 20. In addition, after the lower wire S passes through the insertion path 22 into the wire insertion hole 21, the folded-back portion of the elastically deformed corner portion 20 returns, and the insertion path 22 narrows, thereby preventing the lower wire S from detaching from the insertion path 22 after passing through the wire insertion hole 21.

[0100] Next, we will explain the variations of the corners with different shapes and structures.

[0101] (Variation Example 1)

[0102] Figure 18 This is a perspective view of the corner involved in variation example 1. Figure 19The diagrams illustrate the corners involved in variation example 1. (a) is a side view, and (b) is a front view.

[0103] like Figure 18 , Figure 19 As shown in (a) and (b), the corner portion 20A involved in Modification 1 has a through-path 22A with a wedge-fitting shape. Specifically, the through-path 22A is formed between opposing surfaces, with a recess 23 formed on one of the opposing surfaces and a protrusion 24 that enters into the recess 23 on the other of the opposing surfaces. Moreover, the gap between the wedge-fitting of these recesses 23 and protrusions 24 is set as the through-path 22A. In addition, one opposing surface with the recess 23 has two side wall portions of the recess 23 that are protrusions 23a that protrude from the other opposing surface with the protrusion 24.

[0104] In this modified example 1, during the threading process, the lower thread S, hooked at the corner 20A and pulled towards the front end, engages with the protrusion 23a. Then, it is guided to the thread insertion hole 21 through a wedging insertion path 22A formed by the gap between the recess 23 and the protrusion 24. Therefore, even in this modified example 1, the lower thread S can be easily passed through the thread insertion hole 21 of the corner 20A of the spool housing 10 during the threading process. Furthermore, since the insertion path 22A is formed by the gap between the recess 23 and the protrusion 24 that interlock, it is possible to prevent the lower thread S from detaching from the insertion path 22A after passing through the thread insertion hole 21.

[0105] (Variation Example 2)

[0106] Figure 20 This is a perspective view of the corner involved in variation example 2. Figure 21 The diagrams illustrate the corner involved in variation example 2. (a) is a side view of the closed insertion path, and (b) is a side view of the open insertion path.

[0107] like Figure 20 , Figure 21 As shown in (a) and (b), the corner portion 20B involved in Modification Example 2 has a movable rod 25 that is oscillatingly connected to a base end. The movable rod 25 is formed such that a portion of its arc-shaped front end constitutes a part of the wire insertion through hole 21. In addition, the corner portion 20B has a spring 26, through which the movable rod 25 applies force to its front end in a direction separating from the corner portion 20B.

[0108] In this modified example 2, a through path 22B is formed between the front end and the opposite surfaces of the corner 20B side of the movable rod 25. The opposite surfaces forming the through path 22B are inclined towards the swing axis side of the base end, facing the direction of the force applied by the spring 26 to the movable rod 25. As a result, the movable rod 25 is forced by the spring 26, and the opposite surfaces of the front end and the corner 20B side of the movable rod 25 come into contact, thus closing the through path 22B. In addition, a recess 27 with an arc shape is formed on the opposite surface of the corner 20B side, and a protrusion 28 with an arc shape is formed on the opposite surface of the movable rod 25 side. These recesses 27 and protrusions 28 can engage with each other.

[0109] In this modified example 2, during the threading process, if the lower thread S is hooked onto the corner 20B and pulled towards the front end, the tension of the lower thread S presses down on the movable rod 25, causing it to swing against the preload of the spring 26. As a result, the interlocking recess 27 and protrusion 28 separate, and the insertion path 22B between the front end of the movable rod 25 and the opposing surfaces of the corner 20B is broken (see reference). Figure 21 (b) Thus, the lower wire S passes through the insertion path 22B and through the wire insertion hole 21, and then the movable rod 25 returns via the spring 26, closing the insertion path 22B (see reference). Figure 21 (a) Therefore, in this modified example 2, the lower wire S can also be easily passed through the wire insertion hole 21 at the corner 20B of the spool housing 10 via the threading process. In addition, the movable rod 25, which swings in the opposite direction due to the tension of the lower wire S, closes the insertion path 22B, thereby preventing the lower wire S from detaching from the insertion path 22B after passing through the wire insertion hole 21.

[0110] Figure 22 This is a perspective view, an enlarged view of corner 20C, and a sectional view of the front end of corner 10A, representing another example of a spool housing. In this example, corner 20C of spool housing 10A, like corner 20 of spool housing 10, has its front end bent towards spool housing 10A to form a circular insertion path 22C. Furthermore, as... Figure 22 As shown in the cross-sectional view of the front end of the corner portion 20C, the front end of the corner portion 20C enters into the opening provided in the corner portion 20C.

[0111] Based on the shape of the corner 20C as described above, the lower wire can be easily passed through the insertion path 22C of the corner 20C of the spool housing 10A by the threading process, and the lower wire passing through the insertion path 22C is not easily detached from the insertion path 22C.

[0112] Figure 23These are perspective views, enlarged views of corner 20D, and sectional views of the front end of the corner, representing another example of a spool housing, namely spool housing 10B. In this example, the corner 20D of spool housing 10B, like the corner 20 of spool housing 10, has its front end bent towards spool housing 10B to form a circular insertion path 22D. Furthermore, as... Figure 23 As shown in the cross-sectional view of the front end of the corner portion 20D, the front end of the corner portion 20D enters into the groove provided in the corner portion 20D.

[0113] Based on the shape of the corner 20D as described above, the lower wire can be easily passed through the insertion path 22D of the corner 20D of the spool housing 10B by the threading process, and the lower wire passing through the insertion path 22D is not easily detached from the insertion path 22D.

[0114] (Variation Example 3)

[0115] Figure 24 The figures shown are of another example of a wire-hanging rotating plate installed in the engaging mechanism constituting the winding section; (a) is a front view, and (b) is an oblique view. In this example, the shape of the wire-hanging rotating plate, rather than the corner of the spool housing, differs from the example described above.

[0116] like Figure 24 As shown in (a) and (b), the shape and function of the movable cutter portion 1134 of the wire-hanging rotating plate 1120 in this example are the same as those of the movable cutter portion 134 of the wire-hanging rotating plate 120 described above, so the description is omitted. In the wire-hanging rotating plate 1120 of this example, three wire guide claws 1136A, 1136B, and 1136C are provided at the position where the lower wire S is introduced relative to the movable cutter portion 1134. The first wire-hanging V-groove 1133A is formed by the wire guide claws 1136A and 1136B, and the second wire-hanging V-groove 1133B is formed by the wire guide claws 1136B and 1136C.

[0117] Figure 25 (a) is a diagram showing the state of the unhooked thread hook on the corner of the spool housing during the threading process. Figure 25 (b) is a diagram showing the state where the unhooked thread is not hooked onto the corner of the spool housing during the threading process. For example... Figure 25As shown in (a), the first hanging V-groove 1133A is formed at a position through which the lower wire S passes when it is hooked onto the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B). A movable cutter 1134 is provided at the front end of the first hanging V-groove 1133A. Furthermore, if the lower wire S enters the first hanging V-groove 1133A after being hooked onto the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B), the lower wire S is cut between the movable cutter 1134 and the fixed cutter 135. In contrast, as... Figure 25 As shown in (b), the second hanging V-groove 1133B is formed at a position for the lower wire S to pass through when it is not hooked onto the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B). If, for some reason, the lower wire S cannot be hooked onto the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B), the lower wire S enters the first hanging V-groove 1133A. In this case, the lower wire S does not enter between the movable cutter part 1134 and the fixed cutter part 135, and therefore is not cut.

[0118] Furthermore, in this state, the supply of the lower wire S from the supply mechanism 400 continues. Therefore, for example, by using a sensor provided in the supply mechanism 400 to monitor the supply of the lower wire S, the continued supply of the lower wire S is detected even when the lower wire S is not hooked to the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B).

[0119] As described above, by using the hanging rotating plate 1120 in this example, it is possible to prevent the wire S from being cut by the movable cutter 1134 and the fixed cutter 135 even when the wire S is not hooked to the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B). Therefore, the recovery operation after detecting this state by a sensor or the like becomes easy.

[0120] Furthermore, if the supply of the lower wire S is continued in a state where the lower wire S is not hooked to the corners 20 (20A, 20B, 20C, 20D) of the spool housing 10 (10A, 10B) by a sensor that monitors the supply of the lower wire S provided in the supply mechanism 400, the wire can be cut again by the threading process.

[0121] Furthermore, the present invention is not limited to the above-described embodiments. Any combination of the various structures of the embodiments, modifications made by those skilled in the art based on the description in the specification and known technologies, and applications are also included within the scope of the present invention.

[0122] Explanation of the label

[0123] 1. Unwinding device

[0124] 10, 10A, 10B Bollards

[0125] Corners 20, 20A, 20B, 20C, 20D

[0126] 21-wire through hole

[0127] 22, 22A, 22B, 22C, 22D Insertion paths

[0128] 23 recess

[0129] 24 convex part

[0130] 25 movable rods

[0131] 30 spools

[0132] 101 Winding Mechanism

[0133] 102 Card-connecting mechanism

[0134] 120, 1120 hanging wire rotating plate

[0135] 131 Engagement groove

[0136] 200 spool housing gripping mechanism

[0137] 300 Maintenance Agency

[0138] 310 line retaining plate

[0139] 311 Retaining groove

[0140] 400 supply organizations

[0141] 500 Control Department

[0142] S offline

Claims

1. A wire winding device that automatically winds a wire onto a spool. The feature of this unwinding device is that it has: A spool housing having a slit cut into the end of a peripheral wall portion, a wire extraction hole disposed on the peripheral wall portion and communicating with the slit, and a wire adjuster spring that bends around the periphery of the peripheral wall portion and is mounted on the peripheral wall portion in such a way as to block the wire extraction hole. A spool, which is wound with a lower thread and housed in the spool housing; A supply mechanism that feeds the unwound thread into the spool inside the spool housing and is capable of approaching and separating from the spool housing; A winding mechanism that rotates the spool to wind the lower wire; A bobbin housing gripping mechanism that grips the bobbin housing and moves along the rotation axis of the bobbin while gripping the bobbin housing; The engaging mechanism has a wire-hanging rotating plate rotatably disposed around the spool housing and has an engaging groove that engages with the lower wire pulled out from the spool housing. A wire retaining plate, which is movable relative to the spool housing, and whose retaining groove restricts the movement of the lower wire pulled out of the spool housing upon approach; and The control unit controls the driving of the supply mechanism, the winding mechanism, the bobbin housing gripping mechanism, the locking mechanism, and the wire holding plate. After the lower wire is wound onto the spool by the winding mechanism, the lower wire pulled out from the spool is guided from the slit in the spool housing to the wire extraction hole, and can be set to be pulled outward from the spool housing while the lower wire is clamped between the peripheral wall and the wire adjuster spring. In this unwinding device, The spool housing has a corner portion, which has a wire insertion hole for inserting a lower wire and an insertion path communicating with the wire insertion hole. The control unit causes the supply mechanism to move separately from the spool housing, thereby pulling the lower wire outward from the spool housing and connecting it to the supply mechanism into a tensioned state. It also causes the hanging rotating plate to rotate, causing the engaging groove to engage with the lower wire. Furthermore, the spool housing is moved by the spool housing gripping mechanism, thereby allowing the lower wire to enter the insertion path at the corner and be inserted into the wire insertion hole.

2. The unwinding device according to claim 1, characterized in that, It has a retaining mechanism that allows the wire retaining plate to be oscillating, the wire retaining plate having a retaining groove for retaining the lower wire. When the control unit engages the lower wire via the engaging groove of the wire-hanging rotating plate of the engaging mechanism, The drive of the retaining mechanism is controlled by swinging the wire retaining plate so that the retaining groove holds the lower wire from the opposite side of the engaging groove.

3. The unwinding device according to claim 1 or 2, characterized in that, The spool housing is used in a semi-rotary autoclave sewing machine.

4. The unwinding device according to any one of claims 1 to 3, characterized in that, At the corner, the wire insertion hole is formed by folding back the front end with a rounded corner and connecting it with the root portion. The insertion path is provided at the abutment of the root portion and the folded-back portion.

5. The unwinding device according to any one of claims 1 to 3, characterized in that, The spool housing has the corner portion, which has the insertion path formed by the gap between recesses and protrusions that enter each other.

6. The unwinding device according to any one of claims 1 to 3, characterized in that, The spool housing has a corner with a movable rod that can swing, thereby opening and closing the insertion path by swinging the movable rod.

7. The unwinding device according to any one of claims 1 to 3, characterized in that, It also has a fixed cutter section, which connects to a movable cutter section mounted on the rotating wire-hanging plate, thereby cutting the lower wire passing between the fixed cutter section and the movable cutter section. On the wire-hanging rotating plate, a first wire-hanging V-groove and a second wire-hanging V-groove are formed on the opposite side of the side with the engaging groove in the rotation direction. The first wire-hanging V-groove is formed at a position for the lower wire to pass through when it is inserted into the insertion path of the corner of the spool housing. The second wire-hanging V-groove is formed at a position for the lower wire to pass through when it is not inserted into the insertion path of the corner of the spool housing. The movable cutter is provided at the front end of the first wire-hanging V-groove. When the lower wire is inserted through the insertion path at the corner of the spool housing, the lower wire is guided by the first hanging wire V-groove to the movable cutter part, and is cut by the movable cutter part and the fixed cutter part. When the lower wire is not inserted through the insertion path at the corner of the spool housing, the lower wire is guided by the second hanging wire V-groove to a position in the hanging wire rotating plate that is different from the movable cutter part, and is not cut by the movable cutter part and the fixed cutter part.

8. The unwinding device according to claim 7, characterized in that, The supply mechanism has sensors that monitor the supply from the downstream line. If the sensor detects that the lower wire is not inserted into the corner of the spool housing, the lower wire is again brought into the insertion path of the corner and inserted into the wire insertion hole to perform a wire cutting.

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