JP2004222918A - Sewing machine, control program for controlling actuator and recording medium for controlling actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine operating a thread wiper mechanism and a needle bar release mechanism by a common actuator. <P>SOLUTION: The multihead sewing machine M is provided with the needle bar release mechanism 31 shutting off the driving force to a needle bar 10, the thread wiper mechanism 32 including a thread pulling member 62 wiping the thread T extending downward through an eye 15a of a sewing needle 15 and dissolving a thread loop formed between a threading hook 83 and the eye 15a of the sewing needle 15 by pulling it by the thread pulling member 62, and a drive motor 46 as the common actuator for operating the needle bar release mechanism 31 and the thread wiper mechanism 32. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
The present invention relates to a sewing machine, a control program for controlling an actuator, and a recording medium for controlling an actuator. More particularly, the present invention relates to a sewing machine having a needle bar releasing mechanism and a thread removing mechanism, a control program for controlling an actuator, and a control program for controlling an actuator. It relates to a recording medium.
[0002]
2. Description of the Related Art Conventionally, there has been proposed a thread removing mechanism for removing a thread that has been cut at the end of sewing or at the time of thread change. For example, in Patent Document 1, a wiper member is driven to below a sewing needle by a rotary solenoid, and a thread that has been cut and hanging downward from an eye hole of the sewing needle is hooked on a hook provided at the tip of the wiper member. Therefore, there has been proposed a technique of guiding a thread to a thread clamp.
[0003]
Conventionally, in a sewing machine having a plurality of needle bars, a needle for connecting or disconnecting the transmission of the driving force to the needle bar so that the driving force can be transmitted to one of the plurality of needle bars. Bar release mechanisms have been proposed. For example, Patent Document 2 discloses that a driving pin transmitted from a sewing machine motor to a vertically movable member slidably and rotatably mounted on a base needle bar is connected to a connecting pin fixed to the needle bar to the vertically movable member. In a driving force transmission system capable of transmitting a driving force by being engaged, the vertically moving member is rotated around a base needle bar by a solenoid to release the engagement between the vertically moving member and the connection pin, and the outer moving member is connected to the needle bar. There has been proposed a technology capable of cutting a transmission of a driving force by jumping a needle bar by a fitted spring. This needle bar release mechanism is also used when a stitch is dropped in a sewing machine having only one needle bar.
[0004]
[Patent Document 1] JP-A-6-25479 (4 pages, FIGS. 1 and 2)
[Patent Document 2] JP-A-10-263242 (pages 4 to 7, FIGS. 2 and 3)
[0005]
[Problems to be solved by the invention]
However, if one sewing machine is provided with the thread wiping mechanism described in Patent Literature 1 and the needle bar releasing mechanism described in Patent Literature 2, two actuators such as a solenoid and a rotary solenoid must be provided. It becomes complicated and causes problems such as an increase in the manufacturing cost of the sewing machine.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing machine in which a thread sweeping means and a needle bar releasing means can be operated by a common actuator.
[0007]
According to a first aspect of the present invention, there is provided a sewing machine in which a needle bar releasing means capable of cutting off transmission of a driving force to a needle bar and a thread extending downward through an eye hole of a sewing needle. In a sewing machine provided with a thread pulling means including a thread pulling member, a common actuator for driving the needle bar releasing means and the thread pulling means is provided.
According to this sewing machine, the actuator that separates the transmission of the driving force to the needle bar by the needle bar releasing device also includes a threading device that includes a threading member that wipes a thread extending downward through the eye of the sewing needle. Drive.
[0008]
According to a second aspect of the present invention, there is provided a sewing machine having an origin position of the actuator set near a position where the needle bar releasing means is operated, and an origin detecting means capable of detecting the origin position. According to this sewing machine, the origin detecting means detects the origin position of the actuator set near the position where the needle bar releasing means having a small driving amount is operated.
[0009]
In the sewing machine according to the third aspect, when the needle bar releasing means is driven by the actuator, the stringing member moves in a direction away from the needle bar.
According to this sewing machine, when the needle bar releasing means is driven by the actuator, the driving of the actuator causes the stringing member to move in a direction away from the needle bar.
[0010]
The sewing machine according to claim 4, further comprising a guide storage member that can guide and store the thread pulling member, and stores the thread pulling member in the guide storage member when the needle bar releasing means is driven by the actuator. Is what is done. According to this sewing machine, when the needle bar releasing means is driven by the actuator, the threading member of the threading means is stored in the guide storage member by the drive of the actuator.
[0011]
A sewing machine according to a fifth aspect has a plurality of needle bars, and the plurality of needle bars are provided with sewing needles, respectively. In this sewing machine, a plurality of types of thread are sewn by switching a plurality of needle bars.
[0012]
7. The control program for controlling an actuator according to claim 6, further comprising a thread pulling member for threading a thread extending downward through the eye of the sewing needle, and having a loop shape threaded through the eye of the sewing needle by a threading hook. A thread pulling means for breaking a thread loop by pulling the thread with the thread pulling member, a needle bar releasing means capable of cutting off the transmission of the driving force to the needle bar, and the thread pulling means and the needle bar releasing means. An actuator control program executed by a computer of the control unit to drive and control the actuator in a sewing machine including a common actuator for driving and a control unit for driving and controlling the actuator. A first routine for driving and controlling the actuator to operate the bar releasing means; and operating the threading means to remove the thread. A second routine for driving and controlling the actuator, in which a third routine for controlling driving of the actuator for the thread loop eliminating yarn is threading the eye hole of the sewing needle.
[0013]
According to a control program for controlling an actuator according to a sixth aspect of the present invention, in the first routine, the drive of the actuator is controlled to operate the needle bar releasing means to interrupt the transmission of the driving force to the needle bar. By controlling the drive, the thread pulling means is operated to remove the thread extending downward through the eye of the sewing needle. In the third routine, the drive of the actuator is controlled to thread the eye of the sewing needle with the threading hook. The broken loop-shaped yarn loop is eliminated.
[0014]
According to a seventh aspect of the present invention, there is provided an actuator control recording medium on which the actuator control program according to the sixth aspect is readablely recorded. This actuator control recording medium has substantially the same effect as the actuator control program according to the sixth aspect.
[0015]
Embodiments of the present invention will be described. The present embodiment is an example in which the present invention is applied to an industrial or professional multi-head sewing machine that includes three multi-needle embroidery sewing machines and can simultaneously sew three identical embroidery patterns on a hat.
[0016]
First, the multi-head sewing machine M will be described. The direction in which the worker is located is defined as the front, and the left, right, up, and down as viewed from the worker are defined as left, right, up, and down. As shown in FIG. 1, the multi-head sewing machine M includes an embroidery machine main body frame 1 extending in the left and right direction, and a substantially rectangular sewing machine support plate disposed on the rear side of the upper surface of the embroidery machine main body frame 1 and extending in the left and right direction. 2, three embroidery sewing machines M1 to M3 having the same structure are arranged in a line in the left-right direction on the sewing machine support plate 2.
[0017]
At the front end of a head 4 provided at the tip of each arm 3 of the three embroidery sewing machines M1 to M3, a needle bar case 5 for supporting six needle bars 10 in a vertically movable manner is provided. It is arranged movably in the direction. On the other hand, a pillar 6 is connected to the arm 3, and a bed body 7 connected to the lower end of the pillar 6 is fixed on the sewing machine support plate 2. A cylinder bed 8 extends forward from a front end of the bed body 7, and a thread catcher (not shown) or the like is provided at the front end of the cylinder bed 8. At the right end of the multi-head sewing machine M, an operation panel 9 for an operator to perform various operations is also provided.
[0018]
As shown in FIGS. 3 and 4, each head unit 4 includes a needle bar case 5, an elevating drive mechanism 30 that transmits a vertical driving force from the sewing machine motor 110 (see FIG. 12) to the needle bar 10, A needle bar releasing mechanism 31 capable of separating the transmission of the driving force between the needle bar 10 and the lifting drive mechanism 30, a thread pulling mechanism 32 including a thread pulling member 62, and a threading hook 83 through the eye 15 a of the sewing needle 15. And a common drive motor 46 for driving the needle bar releasing mechanism 31 and the thread pulling mechanism 32 which is a pulse motor.
[0019]
As shown in FIGS. 2 and 3, each needle bar case 5 has six needle bars 10 extending vertically and six balances swingably mounted at positions corresponding to the respective needle bars 10. 11, a first needle bar guide member 12 and a second needle bar guide member 13 fixed to the needle bar case 5 and guiding the needle bar 10, and a fixing plate 17 extending in the left-right direction and fixed at both ends to the needle bar case 5. , A second thread holding member 16 provided corresponding to each sewing needle 15, a presser foot 24, and the like.
[0020]
A connecting member 18 having a connecting pin 18a to which the driving force from the lifting drive mechanism 30 is transmitted is fixed to a central portion of the needle bar 10, and between the connecting member 18 and the first needle bar guide member 12, A compression spring 19 for urging the needle bar 10 upward is fitted on the needle bar 10. A sewing needle 15 is attached to the lower end of each needle bar 10, and a thread T for embroidery is supplied to the six sewing needles 15 from a thread stand 21 of a thread stand 20. The first thread holding member 14 is for holding the thread T pulled by the thread pulling mechanism 32, and is a thread holding member in which two hook-type hook-and-loop tapes (registered trademark) face each other and face to face. It has a tape 14a and a reinforcing plate 14b for sandwiching the thread holding tape 14a.
[0021]
The second thread holding member 16 is for temporarily holding the thread end of the thread T hooked on the threading hook 83 before passing the thread T through the eye 15a of the sewing needle 15 during threading. There is a holding portion 16b that holds the thread T cut by the blade portion 16a, and a guide portion 16c that guides the thread T to the holding portion 16b with its tip raised forward. The thread T is passed from the right side to the left side on the rear side of the guide section 16c, and when the thread T is guided to the blade section 16a, the thread T is pulled downward on the front side, so that the thread T is cut by the blade section 16a. The yarn T is sandwiched between the holding portion 16b and the front surface of the needle bar case 5, and the yarn end is held.
[0022]
When the needle bar case 5 is moved left and right to switch a desired sewing needle 15 to a sewing position facing a needle hole (not shown) at the tip of the cylinder bed 8 and one of the needle bars 10 is selected, the sewing machine is operated. The rotational driving force of the motor 110 is transmitted to the lifting drive mechanism 30 as a vertical driving force by the drive shaft 22, the V-belt 23, and the like, and the needle bar 10 is vertically driven by the vertical drive of the lifting drive mechanism 30. The balance 11 corresponding to the needle bar 10 is also driven to swing up and down, and a stitch is formed with the thread T of the selected color by the cooperation of the sewing needle 15 of the needle bar 10 and the thread catcher.
[0023]
As shown in FIGS. 3, 5, and 6, the lifting drive mechanism 30 is supported by the base needle bar 35 provided in parallel with the needle bar 10 and slidably and non-rotatably by the base needle bar 35. A driving member 36, a transmission member 37 supported vertically rotatable with the driving member 36 and rotatably with respect to the base needle bar 35, one end of which contacts the driving member 36 and the other end of which contacts the transmission member 37. The transmission member 37 has a first winding spring 38 that urges the needle bar 10 to a transmission position where the driving force can be transmitted.
[0024]
The driving member 36 has an upper driving member 36a and a lower driving member 36b which are fitted to the base needle bar 35, and a connecting portion 36c for connecting the upper driving member 36a and the lower driving member 36b. A stopper 39 for fixing the rotation of the transmission member 37 at a predetermined angle is fixed to the left side surface of the lower drive member 36b.
[0025]
The transmission member 37 is mounted between the upper drive member 36a and the lower drive member 36b, and engages the first and second engagement members 40 and 41 for engaging the connecting pin 18a, and the needle from the needle bar release mechanism 31. And a contact post 42 to which a rotational driving force for releasing the rod 10 is transmitted. The first engagement member 40 has an inclined portion 40a for rotating the transmission member 37 in the direction of arrow A in FIG. 6 when the released connection pin 18a abuts.
[0026]
The needle bar releasing mechanism 31 is fixed to the sector gear 47 in which the detection target 60 is formed by being engaged with the output shaft 46 a of the drive motor 46, the origin detector 61 for detecting the detection target 60, and the fixing member 48. A guided plate 50 that is mounted to be vertically movable while being guided by the guided guide pins 49a and 49b, and a first link member 51 whose lower end is swingably connected to the center of the guided plate 50. A second link member 52 swingably connected to the upper end of the first link member 51, a contact member 53 swinging together with the second link member 52, a stopper 54 fixed to the fixing member 48, and the like. Have. The lower end of the front half of the sector gear 47 is in contact with a contact pin 55 fixed to the lower end of the guided plate 50. The origin detector 61 is a photo interrupter having a light receiving element and a light emitting element. When the needle bar 10 is released, the edge of the upper end of the detection target 60 passes between the light receiving element and the light emitting element. Is detected as the origin position of the drive motor 46 set near the position where the needle bar release mechanism 31 is operated. The fixing members 45 and 48 are fixed to the sewing machine frame 56 on the left side.
[0027]
The contact member 53 is rotatably supported by the fixing member 48 and is fixed to the second link member 52 by the screw 57 with the shaft 53 a and the first contact that contacts the contact column 42 of the transmission member 37. It has a portion 53b and a second contact portion 53c that contacts the stopper 54. At the right end of the shaft portion 53a, a second winding spring 59 having one end fixed to a screw 58 screwed to the fixing member 48 is externally fitted, and the contact member 53 is used except when the needle bar 10 is jumped. Is urged in the direction of arrow C shown in FIG. 3 by the second winding spring 59, and the second contact portion 53 c is in contact with the stopper 54.
[0028]
When the needle bar 10 is jumped and released by the needle bar release mechanism 31, the drive motor 46 is driven to rotate the sector gear 47 in the direction of arrow D in FIG. The home position of the motor 46 is detected, and a predetermined number of pulses are sent from the home position to the drive motor 46 to move the guided plate 50 downward. The lower end of the first link member 51 moves downward by the movement of the guided plate 50, and the second link member 52 moves around the axis of the shaft portion 53a in the direction opposite to the arrow C together with the contact member 53 with the movement. Rotate. The contact member 53 presses the contact post 42 of the transmission member 37 that is in contact with the first contact portion 53b by this rotation, and the transmission member 37 is released until the contact post 42 comes into contact with the stopper 39. Is rotated in the direction of arrow A in FIG. 6 (see the contact pillar 42 shown by the two-dot chain line in FIG. 6). By this rotation, the engagement between the first and second engagement members 40 and 41 and the connecting pin 18a is released, so that the needle bar 10 is urged by the compression spring 19 to jump to the upper limit position, and the lifting drive mechanism A release state in which the lifting drive force of 30 is not transmitted to the needle bar 10 is established. Thereafter, a predetermined number of pulses are sent to rotate the drive motor 46 in the reverse direction to return to the standby position.
[0029]
Conversely, in order to change from the released state to the transmission state in which the lifting drive force of the lifting drive mechanism 30 can be transmitted, the transmission member 37 is driven upward by the sewing machine motor 110, and the connecting pin 18a is pressed against the inclined portion 40a from above. The contact member rotates the transmission member 37 in the direction of arrow A in FIG. 6, and further raises the transmission member 37 so that the connecting pin 18 a is positioned between the first and second engagement members 40 and 41. The transmission member 37 is rotated in the direction of arrow B by the urging force of the winding spring 38, and the connection pin 18a is engaged with the first and second engagement members 40 and 41 to be in a transmission state.
[0030]
The thread pulling mechanism 32 removes the thread T extending downward through the eye 15a of the sewing needle 15 at the end of sewing or needle replacement, and is passed through the eye 15a of the sewing needle 15 at the time of threading. This is for eliminating the loop-shaped thread loop L hooked on the threading hook 83.
[0031]
As shown in FIGS. 3, 5, and 6, the stringing mechanism 32 meshes with the output shaft 46a of the drive motor 46, and includes a sector gear 47, a stringing member 62, and both ends of the stringing member 62 and the sector gear 47. And a guide storage member 64 provided with a lid member 65 for guiding and storing the stringing member 62. The thread pulling member 62 has an upright portion 62 a swingably connected to the connecting plate 63 and a hook-shaped hook portion 62 b for pulling the thread T. The thread pulling member 62 is held between the guide storage member 64 and the lid member 65. It is slidably supported in a guide groove 64 a formed in the guide storage member 64. The guide groove 64a for guiding the thread pulling member 62 is provided when the drive motor 46 rotates in the direction of the arrow D to drive the needle bar releasing mechanism 31, so that the thread pulling member 62 moves as shown in FIGS. It is formed so as to be further guided backward from the standby position shown and stored.
[0032]
The thread pulling mechanism 32 includes a sector gear 47 to which a driving force is transmitted from the drive motor 46 to which a predetermined number of pulses have been sent based on the origin position of the drive motor 46 detected at the time of needle bar release during thread removal. 3, the connecting plate 63 is driven downward and forward with the rotation, and the thread pulling member 62 connected to the lower end of the connecting plate 63 is guided by the guide groove 64a to the first position. The hook portion 62b slides to the threading position where the hook portion 62b reaches below the sewing needle 15 through the space between the thread holding members 14, and engages the hook portion 62b with the thread T extending downward through the eye hole 15a (FIG. 3). 2).
From this state, when a predetermined number of pulses are sent to the drive motor 46 to return the threading member 62 to the standby position, the thread T engaged with the threading member 62 passes between the first thread holding members 14. At this time, the yarn T is held by the yarn holding tape 14a of the first yarn holding member 14.
[0033]
4 and 5, the threading mechanism 33 includes a threading motor 70, which is a pulse motor, and guide pins 72a, which mesh with an output shaft 70a of the threading motor 70 and are fixed to the right sewing machine frame 73. The rack 71 has one end connected to a connecting pin 74 fixed to the lower end of the rack 71 and the other end connected to a connecting projection 75 fixed to a guide frame 77. A tension spring 76 for urging the upper portion 71 upward, a guide frame 77 fixed to the right sewing machine frame 73 and formed with a guide groove 77a, and a connecting pin 74 at the lower end of the rack 71 located on the right side of the guide frame 77 are provided. Plate 78 that is swingably connected to the lower end of the crank plate 78 via a first guided pin 79 that is engaged with a guide groove 77a. A pair of left and right thread hooking members having a rectangular parallelepiped link block 80 connected to the left side of the thread 77, and inclined portions 81a, 82a fixed to the distal end of the link block 80 and guiding the thread T to the threading hook 83. 81, 82, a threading hook 83 having a hook portion 83 a sandwiched between a pair of threading members 81, 82 and on which the thread T is hooked, and a threading hook for detecting the position of the threading hook 83. Detector 111 (see FIG. 12).
[0034]
A second guided pin 84 engaged with the guide groove 77a is fixed to the center of the link block 80. The guide groove 77a has an inclined portion 77b and a horizontal portion 77c, and guides the link block 80 downward and forward at the time of threading, and then guides the link block 80 forward in the horizontal direction.
[0035]
Next, the threading by the threading mechanism 32 and the threading mechanism 33 will be described. First, when the operator operates the threading switch 92 (see FIG. 12), the threading hook 83 and the threading member 62 shown in FIG. 7 are both in the standby state, and the threading detector 111 (see FIG. 12). ), The rack 71 is moved downward by the threading motor 70 while being guided by the guide pins 72a, 72b, and the crank plate 78 connected to the rack 71 and the crank plate 78 are detected. The link block 80 first moves downward and forward along the inclined portion 77b of the guide groove 77a, and then moves forward in the horizontal direction along the horizontal portion 77c. 4 and 9, the link block 80 moves until the hook portion 83a of the threading hook 83 passes through the eye hole 15a of the sewing needle 15, and the second guided pin 84 moves to the front end of the guide groove 77a. Stops at the thread hooking position where it comes into contact with.
[0036]
Next, as shown in FIGS. 2 and 4, the worker places the thread T guided by the thread guides 85, 86 and the like on the thread hooking members 81, 82 from the right side, and holds the thread T in the second thread holding state. Cutting is performed by the blade 16a of the member 16, and the free end of the thread T is sandwiched and held between the holding portion 16b and the front surface of the needle bar case 5. At this time, as shown in FIGS. 9 and 10, the worker pulls the thread T hooked on the thread hooking members 81 and 82 upward, so that the thread T is inclined by the inclined portions 81a of the thread hooking members 81 and 82. Guided by 82a to the threading hook 83, the hook is hooked on the hook portion 83a.
[0037]
Next, when the threading switch 92 is again operated by the operator, the threading hook 83 is moved backward by a predetermined distance by the threading motor 70 and stopped at the loop-elimination position located on the rear side of the sewing needle 15. . Next, as shown in FIG. 8, the hook portion 62b of the threading member 62 is driven by the drive motor 46 to which a predetermined number of pulses are sent based on the origin position of the drive motor 46 detected when the needle bar is released. To the yarn pulling position below the yarn loop L through the same locus as that at the time of yarn removal, and engages the free end side F of the yarn loop L with the hook portion 62b.
[0038]
At this time, since the free end of the thread T is released from the thread holding of the second thread holding member 16 and the tension of the thread T is loosened, and the thread loop L is engaged with the threading hook 83, the state shown in FIG. Thus, the width in the left-right direction is increased without the thread loop L between the threading hook 83 and the eye hole 15a dropping downward, and further, as shown in FIG. Since the thread loop L is positioned below the eye 15a of the sewing needle 15 and is substantially perpendicular to the thread pulling member 62, the thread pulling member 62 reliably passes between the thread loops L and engages with the thread T. Can be combined.
[0039]
Next, when the threading member 62 is returned to the standby position by the drive motor 46 to which a predetermined number of pulses have been sent, the thread loop L held between the threading hook 83 and the eye 15a of the sewing needle 15 is moved. The free end side F is pulled out, comes out of the eye hole 15a and also comes off from the threading hook 83, the thread loop L is eliminated, and the threading member 62 further pulls the first free end side F of the thread T while pulling the first end. By passing through the thread holding member 14, the thread T is held by the thread holding tape 14 a of the first thread holding member 14. Then, the thread T is completely threaded through the eye 15a. Next, the threading hook 83 is returned to the standby position by the threading motor 70, and the threading is completed.
[0040]
The operation panel 9 is for inputting various commands related to sewing and the like, and includes an input unit 91 having a display 90, a threading switch 92, and the like, a flexible disk drive 93 (FDD), and the like. The threading switch 92 is for inputting a command for operating the threading mechanism 33 and for inputting a command for causing the threading mechanism 32 to eliminate the thread loop L.
[0041]
Next, the control unit 100 including the computer 101 will be described with reference to the block diagram of FIG. The control unit 100 controls the overall control of the embroidery sewing machines M1 to M3 such as the threading mechanism 33 and the threading mechanism 32. The control unit 100 includes a computer 101 including a CPU 102, a ROM 103, a RAM 104, a bus 105 for connecting these components, an input / output interface 106 for inputting / outputting data to / from the computer 101, and a sewing machine connected to the input / output interface 106. A drive circuit 107 for the motor 110, a drive circuit 108 for the drive motor 46, a drive circuit 109 for the threading motor 70, and the like are provided.
[0042]
The input / output interface 106 is also connected to an origin detector 61 for detecting the origin position of the drive motor 46 and a threading hook detector 111 for detecting the position of the threading hook 83. In the ROM 103, a control program for controlling an actuator for controlling the driving of the drive motor 46 and the like are recorded in a readable manner. The RAM 104 stores various data such as position data received from the origin detector 61, the threading hook detector 111, and the like.
[0043]
The actuator control program is executed by the computer 101 of the control unit 100 to control the drive of the drive motor 46, and is used to control the drive of the drive motor 46 to operate the needle bar release mechanism 31. One routine, a second routine for driving and controlling the drive motor 46 to operate the thread pulling mechanism 32 to remove the thread, and to eliminate the thread loop L of the thread T passed through the eye 15a of the sewing needle 15 And a third routine for controlling the drive of the drive motor 46.
[0044]
Next, the first to third routines will be described with reference to the flowcharts in FIGS. Note that Si (i = 10, 11,...) Indicates a step number.
[0045]
First, the first routine will be described with reference to the flowchart in FIG. When releasing the needle bar 10, the first routine drives the drive motor 46 (S10) to rotate the sector gear 47 in the direction of arrow D. When the sector gear 47 is rotated by a predetermined angle and the origin position of the drive motor 46 is detected (S11; Yes), a predetermined number of pulses are transmitted to the drive motor 46 to further rotate the sector gear 47 in the direction of arrow D. Then, the contact post 42 is moved to the release position (S12), and the needle bar 10 is released by jumping. Next, a predetermined number of pulses are transmitted to the drive motor 46 to return the contact post 42 to the standby position (S13), and the first routine ends.
[0046]
Next, the second routine will be described with reference to the flowchart in FIG. When the thread T extending downward from the eye 15a of the sewing needle 15 is to be wiped, for example, at the time of thread change, the second routine transmits a predetermined number of pulses to the drive motor 46 through the thread pulling member 62 at the standby position. Thus, the thread T is moved to the thread-wiping position (see the two-dot chain line in FIG. 3) (S15), and the thread T is engaged with the hook portion 62b of the thread pulling member 62. Thereafter, the same number of pulses as the time of moving to the threading position and the same number of pulses are transmitted to the drive motor 46, the threading member 62 is returned to the standby position (S16), and the second routine ends. I do.
[0047]
Next, the third routine will be described with reference to the flowchart in FIG. When the thread T is passed through the eye 15a of the sewing needle 15 by the threading hook 83 and the thread loop L formed by the eye 15a and the threading hook 83 is to be eliminated, the third routine generates a predetermined number of pulses. The signal is transmitted to the drive motor 46, and the threading member 62 is moved to the threading position (S20), and the hook portion 62b of the threading member 62 is engaged with the free end side F of the thread loop L. Next, the same number of pulses are transmitted to the drive motor 46 in the opposite direction to the time when the thread is moved to the threading position, and the threading member 62 is returned to the standby position (S21), and the third routine ends. I do.
[0048]
The operation and effect of the embodiment described above will be described.
[0049]
In the multi-head sewing machine M, the needle bar release mechanism 31 and the thread pulling mechanism 32 are operated by driving and controlling the common drive motor 46, so that the configuration can be simplified and the manufacturing cost can be reduced. . When the drive motor 46 drives the needle bar release mechanism 31, the origin detector 61 detects the edge of the upper end of the detection target 60 formed on the sector gear 47, and determines the position as the origin position of the drive motor 46. Therefore, the origin position can be detected more quickly than when the origin position is detected when the threading mechanism 32 having a large driving amount is driven.
[0050]
When the needle bar release mechanism 31 is operated by the drive motor 46 to cause the needle bar 10 to jump, the thread pulling member 62 moves in a direction away from the needle bar 10 and is stored in the guide storage member 64, Since the needle 62 does not come into contact with the needle bar 10 or the like, safety is improved, and breakage of the stringing member 62 can be prevented.
[0051]
Next, a description will be given of a modification in which the above embodiment is partially modified.
[0052]
1) In the above-described embodiment, the present invention is applied to the embroidery sewing machines M1 to M3 including the needle bar case 5 provided with the plurality of sewing needles 15 and the needle bars 10 in one head portion 4. The present invention may be applied to a sewing machine provided with one sewing needle in one head.
[0053]
2) In the above-described embodiment, the present invention is applied to the multi-head sewing machine M including a plurality of embroidery sewing machines M1 to M3, but may be applied to a single-head sewing machine including a single sewing machine. Good.
[0054]
3) In the above-described embodiment, the present invention is applied to an industrial or professional multi-head sewing machine M. However, the present invention may be applied to a household sewing machine for individuals.
[0055]
4) In the above-described embodiment, the fabric moving mechanism, the lifting / lowering drive mechanism 30 for vertically moving the sewing needle 15 and the driving force transmission means are inseparable, but as shown in Japanese Patent No. 3178022. Alternatively, the cloth moving mechanism may be configured to be separable from the lifting drive mechanism, the driving force transmitting means, and the like.
[0056]
5) In the above-described embodiment, the positions of the threading hook 83 and the threading member 62 are located rearward with respect to the sewing needle 15. One or both of the threading member and the threading member may be provided in front of or side of the sewing needle.
[0057]
6) In the above-described embodiment, in a state where the threading hook 83 and the thread T are engaged, the threading member 62 passes through the thread loop L and engages with the thread T. The yarn pulling member may be configured to engage with the yarn loop in a state where the engagement between the yarn and the yarn is released.
[0058]
7) In the above-described embodiment, the thread T is held between the thread holding tapes 14a of the first thread holding member 14, but the thread does not move carelessly, and the first thread holding member uses the first thread holding member when sewing. As long as the holding of the yarn can be appropriately canceled, the yarn may be held simply by placing the yarn on the member. Further, at the start of sewing, the first thread holding member 14 does not operate, and the thread T held by the first thread holding member 14 is pulled by the sewing needle 15 to cancel the thread holding. The holding member may be configured to positively cancel the holding of the yarn by an actuator or the like.
[0059]
8) In the above-described embodiment, the threading member 62 reciprocates along a linear path. However, the sewing machine is configured to reciprocate along an arcuate path or move the path in only one direction. Is also good. In the above-described embodiment, although the moving distance of the threading member 62 is different between the operation at the time of threading and the movement at the time of threading, the straight path is the same, but this linear path is You may change at the time of threading and at the time of thread removal.
[0060]
9) In the above-described embodiment, the present invention is applied to the multi-head sewing machine M in which the worker is located in front in FIG. 1, but in a single-head sewing machine or the like, the right or left in FIG. The present invention may be applied to a sewing machine in which an operator is located at the same time. In such a sewing machine, since the position of the worker changes, for example, the thread of the threading hook or the thread pulling member moves in the direction of the worker so that the thread is moved on a different track from the above-described embodiment. It is desirable that the through hook and the stringing member be configured to move.
[0061]
10) In the above-described embodiment, the present invention is applied to the multi-head sewing machine M for moving and sewing the workpiece with the cylindrical hat frame device. The present invention may be applied to a sewing machine that moves and sews.
Further, the sewing machine may be configured such that the feed dog, the feed roller, or the worker can manually move the sewing object without the embroidery frame.
[0062]
11) In the above-described embodiment, since the free end side F of the thread loop L is located on the left side with respect to the sewing needle 15 as shown in FIG. 11, the hook portion 62b of the threading member 62 is opened on the left side. However, the free end side of the thread loop may be configured to be located on the right side with respect to the sewing needle, and the hook portion of the threading member may be configured to be opened on the right side.
[0063]
12) In the above-described embodiment, a pulse motor is used as the drive motor 46, but other types of motors, solenoids, air cylinders, and the like may be used as the drive motor.
[0064]
13) The needle bar release mechanism 31 may be provided at a position where the threading mechanism 33 is provided in the above-described embodiment.
[0065]
14) In the above-described embodiment, the drive motor 46 and the thread pulling mechanism 32 are always connected, but a clutch mechanism is provided between the drive motor and the thread pulling mechanism, and the drive motor, the thread pulling mechanism, The transmission of the driving force between the two may be configured to be separable.
[0066]
15) The recording medium for recording the threading control program is not limited to the ROM, but may be a flexible disk or a CD-ROM.
[0067]
16) The above-described multi-head sewing machine M includes the bed 7 having the cylindrical cylinder bed 8, but may be a flat bed.
[0068]
The present invention is not limited to the embodiments described above, and those skilled in the art can implement various modifications to the above-described embodiments without departing from the spirit of the present invention. The present invention covers these modifications.
[0069]
According to the first aspect of the present invention, the structure of the sewing machine can be simplified by driving the needle bar releasing means and the stringing member by the common actuator, and the manufacturing cost of the sewing machine can be reduced. Can be reduced.
[0070]
According to the sewing machine of the second aspect, when the needle bar releasing means having a small driving amount is operated, the origin position of the actuator is detected by the origin detecting means, so that the origin position can be quickly detected. In addition, the same effects as those of the first aspect can be obtained.
[0071]
According to the sewing machine of the third aspect, when the needle bar is released, the thread pulling member does not come into contact with the sewing needle or the like, thereby improving safety. In addition, the same effect as the first or second aspect can be obtained.
[0072]
According to the sewing machine of the fourth aspect, when releasing the needle bar, the threading member is stored in the guide storage member, so that breakage of the threading member can be prevented. In addition, the same effects as any of the first to third aspects can be obtained.
[0073]
According to the sewing machine of the fifth aspect, sewing with a plurality of types of embroidery threads can be performed. In addition, the same effects as any of claims 1 to 4 can be obtained.
[0074]
According to the control program for controlling an actuator according to the sixth aspect, the needle bar releasing means and the thread removing means are driven and operated by driving the common actuator, so that the configuration of the sewing machine can be simplified, and Manufacturing costs can also be reduced.
[0075]
According to the recording medium for controlling the actuator according to the seventh aspect, it is easy to apply the threading control program to the sewing machine. In addition, the same effects as those of the sixth aspect can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall view of a multi-head sewing machine according to an embodiment of the present invention.
FIG. 2 is a front view of a needle bar case.
FIG. 3 is a left side view of a main part of the embroidery sewing machine.
FIG. 4 is a right side view of a main part of the embroidery sewing machine.
FIG. 5 is a front view of a main part of the embroidery sewing machine.
FIG. 6 is a plan view of a main part of the embroidery sewing machine.
FIG. 7 is a right side view illustrating the threading operation of the embroidery sewing machine.
FIG. 8 is a right side view illustrating the threading operation of the embroidery sewing machine.
FIG. 9 is a longitudinal sectional view around the eye hole of the sewing needle in a threading state.
FIG. 10 is a plan view around the eye hole of the sewing needle in a threaded state.
FIG. 11 is a plan view around the eye hole of the sewing needle in a state where a thread loop is formed.
FIG. 12 is a block diagram of a schematic configuration of a control unit.
FIG. 13 is a diagram of a first routine of a control program for controlling an actuator.
FIG. 14 is a diagram of a second routine of the control program for controlling the actuator.
FIG. 15 is a diagram of a third routine of the control program for controlling the actuator.
[Explanation of symbols]
M Multi-head sewing machine 10 Needle bar 15 Sewing needle 15a Eye hole 31 Needle bar release mechanism 32 Threading mechanism 46 Drive motor 61 Origin detector 62 Threading member 64 Guide storage member 83 Threading hook T Thread L Thread loop

Claims (7)

A sewing machine provided with a needle bar releasing means capable of cutting off transmission of a driving force to a needle bar, and a threading means including a threading member for threading a thread extending downward through an eye of a sewing needle;
A sewing machine provided with a common actuator for driving the needle bar releasing means and the thread pulling means. 2. The sewing machine according to claim 1, further comprising an origin detecting means for setting an origin position of the actuator near a position at which the needle bar releasing means is operated, and detecting the origin position. The sewing machine according to claim 1, wherein, when the needle bar releasing unit is driven by the actuator, the stringing member moves in a direction away from the needle bar. A guide accommodating member that can guide and accommodate the threading member, wherein the threading member is accommodated in the guide accommodating member when the actuator drives the needle bar releasing means. The sewing machine according to any one of claims 1 to 3. The sewing machine according to any one of claims 1 to 4, comprising a plurality of needle bars, and the plurality of needle bars each provided with a sewing needle. A thread loop including a threading member for threading a thread extending downward through the eye of the sewing needle, and pulling the loop-shaped thread threaded through the eye of the sewing needle by the threading hook with the threading member. Threading means for eliminating the problem, a needle bar releasing means capable of cutting off the transmission of the driving force to the needle bar, a common actuator for driving the threading means and the needle bar releasing means, and driving the actuator An actuator control program executed by a computer of the control unit to drive and control the actuator in a sewing machine having a control unit that controls the actuator.
A first routine for driving and controlling the actuator to operate the needle bar releasing means;
A second routine for driving and controlling the actuator to drive the thread by activating the thread pulling means;
A control program for controlling an actuator, comprising: a third routine for driving and controlling the actuator to eliminate a thread loop of a thread threaded through the eye of the sewing needle. An actuator control recording medium on which the actuator control program according to claim 6 is recorded in a readable manner.

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