KR20060042371A - Thread feeding apparatus for an embroidering machine - Google Patents

Abstract

The present invention relates to an upper thread supplying device for an embroidery machine for supplying the upper thread with a needle from the thread supply unit, the thread tension adjusting body for winding the upper thread at least partially and providing resistance to the upper thread, and installed on a predetermined rotating shaft and spaced apart from the rotation axis. A thread tension adjusting unit for gripping and rotating the upper thread in a closed position, the thread winding member capable of winding the upper thread in the thread tension adjusting body to adjust tension of the upper thread; A thread take-up unit which has a thread hanger which takes the upper thread and swings a predetermined section and relaxes and relaxes the upper thread; A thread drawer having a thread drawer lever for reciprocating between a pullout position at which the upper thread is drawn out from the thread move path and a thread hanger position caught at the thread hanger, and which draws the upper thread on the thread move path and walks on the thread hanger; A driving unit for rotating the thread winding member and reciprocating the thread takeout lever; A rotational motion converting unit for converting the driving motion of the driving unit into a rotational motion and rotating the real winding member such that the upper thread is wound around the mounting force adjusting member; Converting the drive motion of the drive unit to a linear motion, characterized in that it comprises a linear motion conversion unit for moving the thread take-off lever so that the upper thread is caught on the thread hook portion. As a result, the productivity of the upper thread replacement work can be shortened, and the number of parts of the embroidery machine can be reduced.

Description

THREAD FEEDING APPARATUS FOR AN EMBROIDERING MACHINE}

1 is a perspective view of the upper thread supply apparatus for an embroidery machine according to the present invention,

FIG. 2 is a schematic perspective view of a drive related part of FIG. 1;

3 is a side view of main parts of the mounting force adjusting part of FIG. 1;

4 is an enlarged perspective view illustrating main parts of the mounting force adjusting part of FIG. 1;

5 is an exploded perspective view of FIG. 4;

Figures 6a and 6b, 7a and 7b is a partial enlarged perspective and side cross-sectional view showing a step of winding the upper thread to the mounting force regulator,

8 is an enlarged perspective view illustrating main parts of the thread drawing part of FIG. 1;

9 is a side view of main parts of FIG. 8;

10a to 10c is a plan view showing the operation of the thread take-up lever and the thread take-out lever,

11 is a partially enlarged perspective view illustrating a state in which a thread is caught in the thread take-up when the thread take-up is located at the bottom dead center;

12 is an enlarged perspective view of the main part showing a state in which a thread is caught in the thread take-up when the thread take-up is located at the top dead center;

13 is an exploded perspective view of the thread sewing apparatus of FIG. 1;                 

14 is an enlarged exploded perspective view of the main part of FIG. 13;

15 to 18 are perspective views sequentially showing a thread sewing operation of the thread sewing apparatus of FIG.

19 is an enlarged perspective view of a main part of a state in which a thread sewing operation process of the thread sewing apparatus of FIG. 13 is completed;

20 and 21 is a perspective view showing the main portion showing the operation of the thread moving portion of the thread sewing device,

It is a perspective view of the principal part in the operation | movement of the thread moving part of a thread sewing machine completed.

* Explanation of symbols for the main parts of the drawings

1: upper thread supply device 3: upper thread

9: needle 20: mounting force adjusting unit

21: thread tension regulator 25: thread winding member

31: rocking member 60: thread take-up

63: thread hanger 80: thread drawer

81: actual drawing lever 100: drive unit

105: lifting link 111: drive pin

113: drive cam 131: bracket

131a: long hole 135: moving pin

140: thread sewing machine 141: needle bar

143: needle bar lifting member 151: thread catcher

153: hook 155: hook body                 

161: thread catcher driving unit 165: thread catcher support unit

177: thread catcher driving link 179: slope for pin

183: thread transfer bracket 193: inclined portion for the needle bar

195: Thread Release Bracket

The present invention relates to an upper thread supply apparatus for embroidery machines, and more particularly, to an upper thread supply apparatus for embroidery machines in which the drive structure of the embroidery machine is improved.

In general, the automatic embroidery machine includes a head stem provided in front of the fixed frame, a upper thread feeder which is attached to the head stem to supply upper threads of various colors from a plurality of failures in a direction in which embroidery work is performed, and the upper threads supplied in this way. It includes a needle working portion for sewing embroidery work.

In addition, the automatic machine is classified into a single needle and a multi needle according to the number of needles mounted on the upper thread feeder and the needle working part.

An automatic machine for single needles has an upper thread feeding device for selectively feeding any one of a plurality of different colors of upper threads from a plurality of thread bobbins to a single needle work unit.

The multi-needle embroidery machine has an upper thread feeding device for supplying a plurality of different threads of different colors from a plurality of thread bobbins to a plurality of needle work units.

Hereinafter, the upper thread supply apparatus of the automatic machine for single needle will be described.

In the upper thread supply device of the conventional single needle automatic embroidery machine, any one upper thread selected from a plurality of thread bobbins from a plurality of thread bobbins passes through the thread tension regulator and is subjected to resistance to adjust tension and adjust tension. The upper thread is fitted into the needle hole by a thread sewing device having a hook passing through the needle hole of the needle after being caught by the thread hanger of the thread take-up that swings a predetermined section so as to relax and relax during stitching of the needle.

By the way, in the upper thread supply apparatus of the conventional single needle automatic embroidery machine, the upper thread is attached to the thread tension adjusting body, the upper thread is attached to the thread hanger part of the thread take-up, and the thread is inserted into the needle hole by the thread sewing device. Work lamps are carried out by the driving of separate driving units, or in some cases by hand, which requires a large number of driving units, which not only complicates the structure of the embroidery machine but also increases the manufacturing cost and also replaces the upper thread. Since the work is not performed at the same time, there is a problem that the productivity of the upper thread is reduced because the work takes a long time.

Accordingly, an object of the present invention is to partially wind the upper thread on the mounting force adjusting body by driving a single drive unit, and simultaneously perform the operation of hanging the upper thread on the thread hook portion of the thread take-up, thereby reducing the upper thread replacement work time and improving productivity. In addition, the number of parts of the embroidery machine is reduced, the structure is not only simple, but also to provide an upper thread supply device for the embroidery machine that can reduce the manufacturing cost.

In order to achieve the above object, the present invention, in the upper thread supply apparatus for embroidery machines for supplying the upper thread with a needle from the thread supply, the upper thread is wound at least in part and the mounting force adjusting body for giving resistance to the upper thread, and a predetermined rotation axis A thread tension adjusting unit which is installed and has a thread winding member capable of winding the thread above the thread tension adjusting body by holding and holding the upper thread at a position spaced apart from the rotation axis, and adjusting the tension of the upper thread; A thread take-up unit which has a thread hanger which takes the upper thread and swings a predetermined section and relaxes and relaxes the upper thread; A thread withdrawal lever for reciprocating between the withdrawal position from which the upper thread is withdrawn from the thread movement path and the thread hook position caught by the thread hanger portion; and a thread withdrawal portion for withdrawing the upper thread on the thread movement path and walking to the thread hanger portion; ; A drive unit for rotating the thread winding member and reciprocating the thread draw lever; A rotational motion converting unit for converting the driving motion of the driving unit into a rotational motion to rotate the thread winding member so that the upper thread is wound around the mounting force adjusting member; Converting the driving motion of the drive unit to a linear motion, the upper thread is provided with an upper thread supply device for a embroidery machine, characterized in that it comprises a linear motion conversion unit for moving the thread take-out lever so that the thread hook portion is caught.

Here, the driving unit further comprises an elevating link which is lifted by the driving of the drive unit, wherein the rotational motion converting portion, the driving pin protruding from one side of the elevating link; A drive cam having a predetermined camp profile to which the drive pin is movably coupled and rotatably coupled to a predetermined rotation shaft; It may also include a power transmission member for transmitting the rotational motion of the drive cam to the thread winding member.

The linear motion converting unit is provided on any one of the lifting link and the thread drawer, the bracket is formed with a long hole forming a predetermined angle with respect to the lifting direction of the lifting link; It may be provided on the other one of the lifting link and the thread lead-out, it may include a moving pin coupled to the long hole to move linearly.

A needle bar on which a needle is mounted is coupled to be liftable, and further includes a needle bar lifting member connected to the lifting link, wherein the driving unit moves the needle bar lifting member to move up and down the sewing work section to a predetermined thread sewing work section. It can be lifted and lowered, and the needle bar can be lifted and lowered by a single drive unit, and the thread of the needle can be threaded, and the needle replacement can be easily performed.

A thread catcher having a hook on which the upper thread is caught and a hook body supporting the hook, the hook reciprocating so as to pass through the needle hole of the needle and sewing the upper thread into the needle hole; And a thread catcher driving link having a thread catcher supporting portion for supporting the thread catcher, and an inclined portion for a pin formed at a predetermined angle with respect to the lifting direction of the lifting link so as to contact the driving pin within the thread sewing work section of the needle. And a thread catcher driving unit configured to reciprocate the thread catcher, wherein the driving unit moves the driving pin along the inclined portion for the pin so that the thread catcher driving link pressurizes and releases the thread catcher supporting unit to release the hook. It can pass through the needle hole.

A thread moving bracket having an inclined portion for the needle bar that forms a predetermined angle horizontally with respect to the lifting direction of the needle bar, and which is parallel to the plane formed by the needle hole and the hook of the needle and rotatably installed on a predetermined rotation axis; It is provided on the needle bar lifting member, and includes a thread release bracket for sliding the thread moving bracket in sliding contact with the inclined portion for the needle bar to take the upper thread caught on the hook to move to the hook body, the drive unit is the lifting link Lowers the thread moving bracket from the thread sewing work position to the sewing work section by rotating the thread moving bracket by the thread unwinding bracket, and moves the upper thread caught on the hook to the hook body to be released from the hook body and fitted into the needle hole; In this way, the threading operation can be performed in the needle hole of the needle by a single drive unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 1 and 2, the upper thread supply device 1 for the embroidery machine according to the present invention is a fixed frame 5, a head stem 7 provided in front of the fixed frame 5, and the head stem A thread supply unit (not shown) attached to (7) and supplying any one selected from a plurality of upper threads conveyed from a plurality of thread bobbins (not shown) having different colors to the needle 9, and a needle 9 from the thread supply unit. Thread tension adjusting unit 20 for adjusting the tension of the upper thread (3) to move to), thread take-up 60 for tension and relaxation of the upper thread (3) by taking the upper thread (3), and upper thread on the thread movement path ( 3) the thread take-out part 80 which draws out and hangs to the thread take-up 60, and the thread sewing device 140 for fitting the upper thread 3 into the needle hole 9a of the needle 9 (refer FIG. 19). .

The fixed frame 5 is mounted on a horizontal surface such as the ground, or is coupled to a wall or other mechanical device to serve to support the head stem 7 and the like.                     

The head stem 7 preferably has a substantially rectangular plate shape to support the thread supply part and the thread sewing device 140 on its front surface, but may be provided in various shapes to support the thread supply part.

The thread supply part is provided below the thread supply block 11 and the thread supply block 11 in which a single thread supply path 11a is formed, through which any one of the upper threads 3 selected from the plurality of upper threads having different colors moves. It forms a thread guide path (15a) in communication with the thread supply passage (11a) and has a thread guide block (15) for guiding the thread supplied from the thread supply portion to the needle (9).

Between the thread supply block 11 and the seal guide block 15 is provided with a spaced portion 17 spaced at a predetermined interval along the thread movement path.

The separation unit 17 is provided with a mounting force adjusting unit 20 for adjusting the tension of the upper thread 3 moving from the thread supply unit to the needle 9.

As shown in FIGS. 3 to 7, the mounting force adjusting unit 20 adjusts the tension of the upper thread 3 by partially winding and contacting the upper thread 3 passing through the spacer 17. A thread winding member 25 capable of winding the upper thread 3 on the mounting tension adjusting member 21 by rotating the gripper 21 and the upper thread 3 passing through the spacer 17 is provided.

The mounting force adjusting member 21 has a disc shape, and has a thread contact portion 23 formed in a recess along the outer circumference thereof so that the upper thread 3 is partially wound and contacted. The mounting force adjusting member 21 is receivably installed in the receiving groove 29 of the thread winding member 25 which will be described later. As the upper thread 3 contacts and passes through the thread contact portion 23, resistance is generated to adjust the tension of the upper thread 3. On the other hand, the mounting force regulator 21 is rotatably coupled to the second rotating shaft 123 to be described later.

The thread winding member 25 is disposed at the lower end of the thread supply block 11 and is rotatably coupled to the second rotary shaft 123, and separates the axis line and the spaced part 17 of the second rotary shaft 123. The moving paths of the upper thread 3 passing through are spaced apart at predetermined intervals. In addition, the thread winding member 25 is formed with a through hole through which the upper thread 3 passes as a holding part 27 for holding the upper thread 3 passing through the spaced part 17.

In addition, the actual winding member 25 is formed with a receiving groove 29 for receiving the mounting force adjusting body 21, the actual winding member 25 is rotated by the drive of the drive unit 100 to be described later mounting force The upper thread 3 is partially wound up to the thread contact part 23 of the regulator 21.

The thread winding member 25 is connected to the rotary motion conversion unit to be described later, and the upper thread 3 is rotated relative to the mounting force adjusting body 21 so that the upper thread 3 is wound around the mounting force adjusting body 21.

On the other hand, the upper thread 3 is caught by the lower side of the thread winding member 25, and the oscillation member 31 which swings in the predetermined | prescribed section by which the upper thread 3 is tensioned and relaxed by the stitching of the needle 9 is provided.

The swinging member 31 is coupled to a bush 35 rotatably coupled to the outer circumference of the second rotation shaft 123. The swinging member 31 has a direction change unit 31a for changing the direction of movement of the upper thread 3 toward the needle 9, and a bush 35 through the direction change unit 31a at a predetermined interval. The bush coupling portion 31b approaching and spaced apart from the magnetic sensor (not shown) to detect the rocking of the rocking member 31, and the one side edges of the direction switching portion 31a and the bush coupling portion 31b are mutually connected to each other. It has a connecting portion (31c) to maintain the gap between the switching portion (31a) and the bush coupling portion (31b). The thread-hanging hole 33 which bends and bends the upper thread 3 turned by the direction change part 31a is provided in the direction change part 31a of the oscillation member 31. As shown in FIG.

The swinging member 31 moves the threading hole 33 on the movement path of the upper thread 3 so that the upper thread 3 is caught by the threading hole 33 by the driving of the swinging member driving part 41. The rocking member driving unit 41 has a predetermined camp profile 43a formed on a side surface of the rocking member driving cam 43 and rotatably coupled to the outer circumference of the bush 35, and the rocking member driving cam 43. The cam pin 45 moving along the camp profile 43a and the cam pin 45 are moved along the camp profile 43a of the rocking member driving cam 43 to rotate the rocking member driving cam 43. The oscillating member driving cam 43 is connected to the driving unit (not shown), the oscillating member driving cam 43, and the head stem 7 so that the oscillating member driving cam 43 returns to its original position with a predetermined elastic force. It has the cam elastic member 49 to rotate.

On the other hand, the swinging member 31 is moved from the position where the upper thread 3 is tensioned by the swinging member elastic member 51 that provides a predetermined elastic force to the position where the upper thread 3 is relaxed.

The swinging member elastic member 51 is provided between the swinging member 31 and the swinging member drive unit 41. One end of the swinging member elastic member 51 is supported by the swinging member drive cam 43 to be described later, and the other end is supported by the swinging member 31.

As shown in FIGS. 8 to 12, the thread take-up 60 forms an arm 61 which swings between the top dead center and the bottom dead center, and an opening 65, and is provided in one region of the arm 61 and the upper thread. (3) The thread hanger part 63 which takes. And an arm driver 75 for oscillating the arm 61.                     

The arm 61 oscillates between the top dead center and the bottom dead center formed in front of the real movement path by the driving of the arm driving unit 75. As the arm drive unit 75, a fluid pressure cylinder, a motor, a cam device, a solenoid or the like can be applied.

The thread hook portion 63 is provided at the free end of the arm 61 and swings between the top dead center and the bottom dead center together with the arm 61. The thread hanger 63 forms an open portion 65 in which one side is opened so that the upper thread 3 is caught.

In addition, the thread hook portion 63 further has a flap 67 that prevents detachment of the upper thread 3 accommodated in the opening portion 65, and the flap 67 is located in an area adjacent to the opening of the thread hook portion 63. Rotably coupled to open and block the opening 65. One side of the flap 67 is elastically supported by the thread hanger 63 by the flap elastic member 69. The flap elastic member 69 provides an elastic force so that the flap 67 blocks the opening 65. In this embodiment, the coil spring is disclosed as the flap elastic member 69. In addition to the coil spring, the leaf spring is provided. Or spiral springs may be applied. In addition, the flap 67 is rotated by the flap elastic member 69 so that the free end of the flap 67 is provided in the opening area of the thread hanger 63 when the opening 65 is blocked. It is held in the lock and no longer rotates.

Accordingly, the flap 67 opens the open portion 65 by pressing the thread draw lever 81, which will be described later, blocks the open portion 65 by the flap elastic member 69, and opens the open portion 65. The separation of the upper thread (3) received in the prevent.

The thread take-out part 80 includes a thread take-out lever 81 for reciprocating between the withdrawal position where the upper thread 3 is withdrawn from the thread movement path and the thread hanger position that is caught by the thread hanger 63, and the thread take-out lever 81 ) Has a pullout lever bracket (91) rotatably supporting ().

The thread drawing lever 81 is installed in one region of the thread guide block 15 so as to be linearly movable along the cutout portion 19 cut at a predetermined angle with the movement path of the upper thread 3. One end of the actual drawing lever 81 is provided with a pair of holding ends 83a and 83b which are arranged to face each other at a predetermined interval. Hereinafter, for convenience of explanation, the grip end located on the upper side is referred to as the upper grip end 83a, and the grip end located below is referred to as the lower grip end 83b. The upper gripping end 83a and the lower gripping end 83b form a flap accommodating part 87 in which the flap 67 is accommodated together with the draw lever bracket 91 to be described later. In the upper gripping end 83a and the lower gripping end 83b, through-holes 85a and 85b through which the upper thread 3 passes are formed as gripping portions for holding the upper thread 3, respectively.

Accordingly, the thread take-off lever 81 moves linearly toward the thread hanger 63 located at the bottom dead center region in a plane that forms a predetermined angle with the thread movement path of the spacer 17 and passes through the spacer 17. Hold the upper thread (3) to hang on the thread hanger (63).

The take-out lever bracket 91 has a plate shape and presses the flap 67 together with the pull-out lever 81 to open the opening 65 of the thread take-up 60 so that the upper thread 3 in the opening 65 can be opened. Receive) The profile part 93 which has a predetermined shape is provided in the plate surface of the pullout lever bracket 91 located in the pair of holding | gripping ends 83a and 83b area | region of the real draw lever 81, and this profile part 93 The flap 67 is in sliding contact. The profile portion 93 is formed in parallel with the linear movement direction of the gripping ends 83a and 83b to linearly move the flap 67 accommodated in the flap accommodating portion 87 and the linear movement portion ( It has a horizontal moving part 93b formed horizontally in a predetermined inclination with respect to the linear movement direction of the holding | gripping ends 83a and 83b from one side of 93a). In addition, one side of the takeout lever bracket 91 is elastically supported by a takeout lever elastic member (not shown), and the takeout lever elastic member includes a flap 67 in which the takeout lever bracket 91 is accommodated in the flap accommodation portion 87. Elastic pressure to pressurize.

Thus, the thread takeout lever 81 and the takeout lever bracket 91 are connected to a linear motion converting unit to be described later, and reciprocate between the pullout position of the upper thread 3 and the thread hanger position.

On the other hand, the upper thread supplying apparatus 1 for the embroidery machine according to the present invention is connected to the driving unit 100 and the driving unit 100 to rotate the thread winding member 25 and to reciprocate the thread take-off lever 81, the driving unit 100 Mounting winding member 25 is mounted so that the upper link 3 is wound on the mounting force adjusting body 21 by converting the elevating link 105 and the driving motion of the driving unit 100 into the rotary motion. The rotational motion conversion unit for rotating relative to the force regulator 21 and the drive motion of the drive unit 100 are converted to linear motion so that the upper thread 3 is caught by the thread hanger 63 so that the thread take-out lever 81 It has a linear motion conversion unit for moving.

In this embodiment, the fluid pressure cylinder is provided as the drive unit 100.

The fluid pressure cylinder has a cylinder body 101 and a cylinder rod 103 that reciprocates by extending and contracting the length by the operation of the cylinder body 101. The cylinder body 101 is supported by the head stem 7, and the cylinder rod 103 is disposed in parallel with the lifting link 105 at a predetermined interval. Here, although the fluid pressure cylinder is disclosed as the driving unit 100 in this embodiment, a motor or the like may be applied in addition to the fluid pressure cylinder.

The lifting link 105 is erected in parallel with the cylinder body 101 at predetermined intervals, and further has a connecting link 107 connecting the cylinder rod 103 and the lifting link 105 to each other. The connecting link 107 is supported at one side of the free end of the cylinder rod 103 and the lifting link 105.

The rotational motion converting unit includes a driving pin 111 protruding from one side of the lifting link 105 and a predetermined camp profile 115 to which the driving pin 111 is movably coupled, and the first rotation shaft 117. It has a drive cam 113 rotatably coupled to the power transmission member for transmitting the rotational movement of the drive cam 113 to the actual winding member (25).

The drive cam 113 is coupled to the first rotation shaft 117, and the first rotation shaft 117 is rotatably installed on the support frame 8 supported by the head stem 7. The camp profile 115 of the drive cam 113 is a rise in which the drive pin 111 rises along the drive cam 113 in response to the lift link 105 so that the drive cam 113 rotates in only one direction. The driving section 111 has a descending profile section in which the driving pin 111 descends along the driving cam 113 in response to the lowering of the profile section and the lifting link 105. Here, the drive cam 113 is preferably only one rotation.

The power transmission member is spaced apart from the first rotation shaft 117 by a predetermined shaft distance, and the second rotation shaft 123 to which the actual winding member 25 is coupled, and a pair of pulleys coupled to each rotation shaft 117 and 123 ( 125 and a belt connecting the pulleys 125 and transmitting the rotational force of the first rotary shaft 117 to the second rotary shaft 123, that is, the rotational force of the drive cam 113 to the real winding member 25. Has 127. In addition, the bush 35 is coupled to the second rotation shaft 123, the second rotation shaft 123 is rotatably installed on the support frame (8).

The linear motion converting part is provided on the lifting link 105 and is provided on the bracket 131 having a long hole 131a formed at a predetermined angle with respect to the lifting direction of the lifting link 105, and the long lead portion 131a. It has a moving pin 135 is movably coupled to the linear movement. Here, although not shown, in another embodiment, the bracket 131 may be provided in the thread lead-out unit 80, and the moving pin 135 may be provided in the lifting link 105.

On the other hand, as shown in Figure 13 to 22, the thread sewing device 140, the needle 9 mounted on the needle bar 141 is out of the sewing operation section the upper thread (3) in the needle hole (9a) of the needle (9) The needle bar 141 has a needle bar lifting member 143 to which the needle bar 141 can be lifted and lowered so as to ascend to a thread sewing work section for sewing the thread.

The needle bar elevating member 143 is installed to be elevated on the head stem 7, and has a pair of guide parts 143a and 143b for partially accommodating the needle bar 141 and guiding the lifting of the needle bar 141. Hereinafter, for convenience of description, the guide portion located above the needle bar lifting member 143 is referred to as an upper guide portion 143a, and the guide portion located below is referred to as a lower guide portion 143b. The pair of guide parts 143a and 143b are arranged coaxially and spaced apart. The upper guide portion 143a of the needle bar lifting member 143 is coupled to the connecting link 107, and the elastic guide receiving groove 145 is partially accommodated in the needle guide elastic member 147 in the upper guide portion 143a. Formed.

The needle bar elastic member 147 is installed along one side outer circumference of the needle bar 141 and is accommodated in the elastic member accommodation groove 145 of the upper guide part 143a to elastically move the needle bar 141 and the needle bar lifting member 143. Connect with In addition, the needle bar elastic member 147 also serves as a buffer of the needle bar 141 during the sewing operation of the needle (9).                     

In addition, the thread sewing device 140 according to the present invention has a hook 153 on which the upper thread 3 is caught, and a hook body 155 supporting the hook 153, and stitches the upper thread 3 into the needle hole 9a. Thread moving part 181 which catches the thread catcher 151, the thread catcher drive part 161 which reciprocates the thread catcher 151, and the upper thread 3 which caught on the hook 153, and moves it to the hook body 155. Has

The thread catcher 151 has a hook 153 on which the upper thread 3 is caught, and a hook body 155 supporting the hook 153.

The hook 153 has a clasp shape, and one end of the hook 153 is supported by a long rod-shaped hook body 155 having a relatively large cross-sectional area.

The thread catcher driving unit 161 is a pair for supporting the main body 163, the thread catcher support 165 for supporting the thread catcher 151, and the thread catcher support 165 for reciprocating to the main body 163. The support shaft 171 and the thread catcher driving link 177 for reciprocating the thread catcher supporting portion 165.

The main body 163 has a block shape of which one side is opened and is coupled to the fixed frame 5. The upper surface of the main body 163 is formed with a slot 163a for preventing interference during the reciprocating movement of the rotating pin 207 to be described later.

The thread catcher supporting portion 165 has a block shape, is provided in the main body 163 so as to be reciprocated, and one end thereof protrudes from the main body 163. At one end of the thread catcher supporting portion 165 protruding from the main body 163, the thread catcher 151 is supported so that the hook 153 faces the needle hole 9a of the needle 9. In addition, a pair of hook guides 167 are provided on both sides of the hook 153 to guide the movement of the hook 153 so that the hook 153 smoothly passes through the needle hole 9a of the needle 9. The hook guide 167 is supported by the thread catcher support 165. The thread catcher supporting portion 165 is provided with a link receiving groove 169 in which one end of the thread catcher driving link 177 to be described later is accommodated.

The thread catcher support part 165 is supported by the pair of support shafts 171 provided in the main body 163 so that reciprocation is possible. A support shaft elastic member 173 is provided between the inner wall of the main body 163 and the thread catcher support 165, and the support shaft elastic member 173 is provided on the outer circumference of the support shaft 171. The support shaft elastic member 173 serves to allow the hook 153 passing through the needle hole 9a of the needle 9 to exit from the needle hole 9a and return to its original position while the upper thread 3 is hooked. Do it.

The thread catcher driving link 177 is rotatably mounted to the head stem 7 so as to approach and space the thread catcher support 165. At the upper end of the thread catcher driving link 177, the inclined portion 179 for the pin contacting the driving pin 111 is provided as the needle bar elevating member 143 and the elevating link 105 rise within the thread sewing work section. The inclined portion 179 is formed at a predetermined angle horizontally in the lifting direction of the needle 9.

Accordingly, when the needle bar elevating member 143 and the elevating link 105 are raised within the thread sewing work section by the driving of the driving unit 100, the pin inclination provided at the upper end of the thread catcher driving link 177 is inclined. The lower portion of the thread catcher driving link 177 is rotated toward the thread catcher support part 165 to press the thread catcher support part 165 and the thread catcher support part 165 along the part 179. Is advanced along the support shaft 171 forward from the rear of the main body 163 and the hook 153 passes through the needle hole (9a).                     

The thread moving part 181 which catches the upper thread 3 caught by the hook 153 and moves it to the hook body 155 passes through the needle hole 9a, and catches the upper thread 3 of the state caught by the hook 153. It has a thread moving bracket 183 for moving to the hook body 155, and a thread moving part 191 for driving the thread moving bracket 183.

The thread moving bracket 183 is rotatably installed in the main body 163 in parallel with the plane formed by the needle hole 9a and the hook 153. A thread take-up part 185 is provided in one region of the thread moving bracket 183 to hold the upper thread 3 hooked on the hook 153 through the needle hole 9a. The thread moving bracket 183 is rotatably coupled to the auxiliary support 187 coupled to the inner side of the main body 163. In addition, the thread movement bracket 183 is elastically supported by the auxiliary support part 187 by the elastic member 189 for thread movement brackets.

The thread movement driving part 191 moves in contact with the needle bar inclination portion 193 formed on one side of the thread movement bracket 183 along the needle bar inclination portion 193 by the lowering of the needle bar 141, and thus the thread movement bracket. The thread release bracket 195 which rotates the 183 is provided.

The inclined portion 193 for the needle bar has a predetermined width horizontally with respect to the longitudinal direction of the thread movement bracket 183 so that one end surface of the thread release bracket 195, which will be described later, contacts one side of the thread movement bracket 183, and can be elevated. As much as it is cut off.

Thread release bracket 195 is coupled to the lower end of the needle bar lifting member 143, the tip portion in contact with the needle bar inclined portion 193 has a triangular cross-sectional shape. The thread release bracket 195 is spaced and in contact with the inclined portion 193 for the needle bar formed on the thread movement bracket 183 according to the lifting and lowering of the needle bar 141 and the needle bar lifting member 143.                     

Therefore, the needle bar 141 and the needle bar lifting member 143 are lowered together as the needle 9 descends from the thread sewing work section to the sewing work section, so that the thread release bracket 195 is also formed on the thread moving bracket 183. The thread moving bracket 183 rotates toward the rear of the main body 163 while descending while being in contact with the substitute inclined portion 193, passing through the needle hole 9a to be hooked to the hook 153. ) Is moved to the hook body (155).

On the other hand, the thread sewing device 140 guides the upper thread 3 provided from the thread supply part to the plane formed by the needle hole 9a and the hook 153 of the needle 9 and guides the thread guide part 111 to hang on the hook 153. Have more)

The thread guide part 111 includes a rotation bracket 203 having a predetermined thread guide inclination part 205 formed on one side thereof, and a rotation pin 207 which is in contact with the thread guide inclination part 205 of the rotation bracket 203. And a thread guide bracket 209 for guiding the upper thread 3 provided from the thread supply part to a plane formed by the needle hole 9a and the hook 153, a rotation bracket 203, and a thread guide bracket 209. And an auxiliary link 215 for interconnecting and transmitting the rotation of the rotation bracket 203 to the thread guide bracket 209.

Rotating bracket 203 is rotatably coupled to the upper surface of the main body 163. One side of the rotation bracket 203 is formed with a thread guide inclined portion 205 forming a predetermined angle horizontally with respect to the longitudinal direction of the rotation bracket 203.

The pivot pin 207 protrudes upward from the upper surface of the thread catcher support 165, and moves in contact with the thread guide inclined portion 205 of the pivot bracket 203 by the reciprocating movement of the thread catcher support 165. The rotation bracket 203 is rotated. In addition, the pivot pin 207 is reciprocated along the slot 163a of the main body 163, and thus no interference with the main body 163 occurs.

The thread guide bracket 209 has a pair of seal guides 211 protruding from one end at predetermined intervals. Each seal guide 211 is formed with a thread through hole 211a through which the upper thread 3 passes to fill the upper thread 3 provided from the thread supply part. In addition, the other end of the thread guide bracket 209 is connected to the auxiliary link (215).

The auxiliary link 215 connects the rotation bracket 203 and the thread guide bracket 209 to each other, and transmits the rotation of the rotation bracket 203 to the thread guide bracket 209 to rotate. The auxiliary link 215 passes through the through hole 211a of the thread guide bracket 209 so that the upper thread 3 is positioned in the plane formed by the needle hole 9a and the hook 153. The rotation is transmitted to the thread guide bracket 209 to rotate.

On the other hand, the rotation bracket 203 is provided with a stopper 221 extending from the distal end of the thread guide inclined portion 205. The stopper 225 formed on the lower side of the elevating bracket 223 is in contact with the stopper 221 so that the upper thread 3 is rotated so as to be positioned in a plane formed by the needle hole 9a and the hook 153 ( 203 restricts the return to the original position.

The lifting bracket 223 is disposed above the rotation bracket 203 and is elastically supported by the stopper elastic member 227 which provides a predetermined elastic force so that the stopper 225 presses the upper part of the main body 163. . One end of the stopper elastic member 227 is supported by the lifting bracket 223, and the other end is supported by the main body 163. An elevating rod 231 is erected on an upper side of the elevating bracket 223 facing the stopper 225, and the elevating rod 231 is provided on an elevating bracket 223 by elevating the elevating link 105. In contact and spaced apart, the stopper 225 provided on the lower side of the lifting bracket 223 is spaced and in contact with the stopper 221.

The lifting rod 231 has a rod shape, and is liftably coupled to the extension 143 extending from the bracket 131. The lower end of the elevating rod 231 is in contact with and spaced apart from the upper side of the elevating bracket 223, the other end of the elevating bracket 223 at the upper end of the elevating rod 231 when the elevating link 105 is lowered within the thread sewing work section. An elevating rod elastic member 235 is mounted to elastically press the end portion.

The elevating rod 231 is raised together with the needle elevating member 143 when the needle bar elevating member 143 ascends to a predetermined top dead center position within the thread sewing work section, and the lower end of the elevating rod 231 is raised and lowered. The lifting bracket 223 is released from pressure from the upper side of 223. At the same time, the stopper 225 provided in the elevating bracket 223 presses the upper surface of the rotation bracket 203 by the elastic force of the stopper elastic member 227.

Subsequently, when the thread 3 held on the thread guide bracket 209 is rotated so as to be positioned in the plane formed by the needle hole 9a and the hook 153, that is, when the rotation bracket 203 is rotated by a predetermined angle, the stopper 225 is detached from the upper surface of the rotating bracket 203 and in contact with the upper surface of the main body 163 by the elastic force of the stopper elastic member 227 and in close contact with the stopper 221 of the rotating bracket 203 The rotation bracket 203 does not return to its original position.

Then, when the needle (9) is lowered from the thread sewing work section to the sewing work section, the lifting rod 231 together with the needle bar lifting member 143 is lowered, and the lower end of the lifting rod 231 is a lifting bracket ( When pressing the upper side of the 223, the stopper 225 is spaced apart from the upper portion of the main body 163 and the stop jaw 221, the rotation bracket 203 is returned to its original position.

By such a configuration, when replacing the upper thread (3) or changing the single thread to replace the upper thread (3) in accordance with the change of color during embroidery, the operation process of the upper thread supply device (1) for the embroidery machine according to the present invention will be described as follows. same.

First, the holding part 27 of the thread winding member 25 is positioned on the thread movement path of the spaced part 17 provided between the thread supply block 11 and the seal guide block 15.

At the same time, the through-holes 85a and 85b of the respective grip ends 83a and 83b of the thread takeout lever 81 and the thread guide path 15a of the seal guide block 15 are communicated.

Further, the cam pin 45 is driven to drive the cam pin 45 so that the thread engaging hole 33 of the rocking member 31 and the grip portion 27 of the thread winding member 25 which are mutually biased are coaxial. It moves along the camp profile 43a of (43). As the cam pin 45 moves up and down the camp profile 43a of the rocking member driving cam 43, the rocking member 31 is rotated while the rocking member driving cam 43 rotates, as shown in FIGS. 6A and 6B. As described above, the thread hook hole 33 of the swinging member 31 is in coaxial communication with the gripping portion 27 of the thread winding member 25.

Subsequently, any one of the upper threads 3 selected from the plurality of upper threads of different colors waiting in the thread supply part passes through the spaced part 17 via the thread supply path 11a of the thread supply block 11 by compressed air. Through the thread guide path (15a) of the guide block 15 is directed to the needle (9).                     

At this time, the upper thread (3) exiting the thread supply path (11a) passes through the gripping portion (27) of the thread winding member (25) and the thread hook hole (33) of the swinging member (31) to guide the thread (15a). Through, through the thread through holes (85a, 85b) of each holding end (83a, 83b) of the thread take-out lever 81, it is guided to the needle (9) located at the bottom dead center of the sewing work section.

Next, the driving unit 100 is driven to raise the lifting link 105 so that the needle 9 is positioned at the top dead center of the sewing work section.

At this time, as the lifting link 105 rises, the thread winding member 25 is rotated in one direction by the driving of the driving cam 113, and the upper thread held by the grip portion 27 of the thread winding member 25 ( 3) is drawn out from the thread movement path of the spaced portion 17 and wound along the thread contact portion 23 of the mounting force adjusting member 21, and the upper thread wound on the thread contacting portion 23 of the mounting force adjusting body 21. (3) resistance is generated while passing through the thread contact portion 23 of the mounting force adjusting member 21, and tension is generated in the upper thread 3 moving along the thread contact portion 23.

That is, as the lifting link 105 rises, the driving pin 111 moves along the rising profile section of the driving cam 113 to rotate the driving cam 113 in one direction. As the driving cam 113 rotates, the first rotating shaft 117 rotates so that the rotational force of the first rotating shaft 117 is transmitted to the second rotating shaft 123 via each pulley 125 connected by the belt 127. , The real winding member 25 is rotated in one direction.

On the other hand, the upper thread (3) moving through the mounting force adjusting member (21) to the thread guide block (15) is caught by the upper thread (3) in the thread hook hole (33) of the swinging member (31), and then the cam elastic member The swinging member 31 returns to its original position by the elastic force of 49, and the returned swinging member 31 swings by the elastic force of the elastic member 51 for the swinging member. Thus, the upper thread 3 passing through the rocking member 31 is tensioned and relaxed by the rocking of the rocking member 31 as well as the tension of the upper thread 3 itself applied by the mounting force adjusting member 21.

At the same time, as the lifting link 105 ascends, as shown in FIG. 81 approaches the thread hanger 63 of the thread take-up 60 located at the bottom dead center together with the draw lever bracket 91, and presses the flap 67 of the thread take-up 60, as shown in FIG. 10B. As described above, the flap 67, which has blocked the open portion 65 of the thread hanger 63, is rotated into the open portion 65 to open the open portion 65, and then the When the upper thread 3 held by the through holes 85a and 85b reaches a predetermined position in the opening 65, the flap 67 is returned to its original position by the elastic force of the flap elastic member 69. That is, it returns to the position which cuts off the opening part 65. FIG.

Then, the flap 67 is accommodated in the flap receiving portion 87 formed by the thread takeout lever 81 and the takeout lever bracket 91, and the flap 67 is also a profile portion 93 of the takeout lever bracket 91. To contact.

Next, the elevating link 105 is raised by driving the driving unit 100 to move the needle 9 out of the top dead center of the sewing work section to the thread sewing work position of the needle 9.

At this time, as the elevating link 105 is raised, the link link 107 is raised, and the needle to elevating member 143 is also raised.

As the needle bar lifting member 143 rises, the needle bar 141 is raised by the elastic force of the needle bar elastic member 147. At this time, the connection between the needle bar 141 and the needle bar drive unit is released by a clutch (not shown) so that trouble with the needle bar drive unit (not shown) due to the rise of the needle bar 141 does not occur. In addition, as the needle bar 141 is raised, the needle 9 rises by a predetermined height from the top dead center of the sewing work section so that the needle hole 9a of the needle 9 is hook 153 of the thread catcher 151. It is positioned on the same plane as that of the needle thread 9a and the hook 153 as shown in FIG.

On the other hand, after the upper thread (3) is coupled to the thread through hole (211a) of the thread guide bracket 209 and the needle bar lifting member (143) is raised to the thread sewing work position, the needle (9) and the needle bar (141) are aligned with thread sewing. Only the needle bar elevating member 143 ascends to the thread sewing operation position while maintaining the position. As the needle bar lifting member 143 ascends to the thread sewing operation position, as shown in FIG. 16, the inclined portion for the pin having the driving pin 111 protruding on one side of the lifting link 105 is provided on the thread catcher driving link 177. 179 is in contact with the ascending movement, so that the lower end of the thread catcher driving link 177 is received in the link receiving groove 169 while rotating forward from the rear of the main body 163 to the thread catcher supporting portion 165. Pressurized. At the same time, the elevating rod 231 which has pressed the elevating bracket 223 also rises, and the elevating bracket 223 is depressurized by the elevating rod 231.

As the thread catcher supporting portion 165 is pressed, the thread catcher supporting portion 165 is advanced from the rear of the main body 163 to the front, thereby being located on the same plane as the needle hole 9a of the needle 9. The hook 153 of the thread catcher 151 is advanced toward the needle hole 9a and passes through the needle hole 9a.                     

On the other hand, as the thread catcher 165 moves forward from the rear of the main body 163 to the front, the pivot pin 207 provided on the upper side of the thread catcher 165 moves forward along the slot of the main body 163. The stopper 225 provided on the lifting bracket 203 is provided with a stopper 225 formed on the rotating bracket 203 by the stopper 225 provided in the lifting bracket 223 to rotate the rotating bracket 203 in contact with the thread guide inclined portion 205 formed on the rotating bracket 203. In close contact with the 221, the rotation bracket 203 no longer rotates.

In addition, as the rotation bracket 203 rotates, the auxiliary link 215 rotates, so that the thread guide bracket 209 rotates at an approximately 90-degree angle, as shown in FIG. 17, of the thread guide bracket 209. The upper thread 3 passing through the through hole 211a is guided onto the plane formed by the needle hole 9a of the needle 9 and the hook 153, and the upper thread 3 is hung on the thread catcher 151. give. At this time, the thread catcher 151 and the hook guide 167 are positioned between the pair of seal guides 211 of the thread guide bracket 209.

Next, the needle bar elevating member 143 raised to the thread sewing operation position drives the driving unit 100 to move to the thread sewing alignment position, as shown in FIG. 18, to lower the lifting link 105.

At this time, as the needle bar elevating member 143 descends, the elevating rod 231 spaced apart from the elevating bracket 223 also begins to descend. In addition, as the needle bar elevating member 143 descends, the driving pin 111 protruding on one side of the elevating link 105 contacts and descends along the inclined portion 179 provided in the thread catcher driving link 177. The lower end of the thread catcher driving link 177 rotates toward the rear of the main body 163 to release and release the thread catcher support 165.                     

As the thread catcher support part 165 is depressurized by the thread catcher driving link 177, the thread catcher support part 165 moves to the rear of the main body 163 by the elastic force of the support shaft elastic member 173. The thread catcher 151 supported by the thread catcher support part 165 also moves to the rear of the main body 163 so that the hook 153 of the thread catcher 151 has the needle thread of the needle 9 with the upper thread 3 hanging. It exits 9a and is spaced apart from the needle 9 at predetermined intervals. At this time, the upper thread 3 passes through the needle hole 9a of the needle 9 to hold the hook 153 of the thread catcher 151.

Next, when the needle 9 is lowered by driving the drive unit 100 so that the needle 9 moves from the thread sewing work section to the sewing work section, the needle 9 and the needle 9 are lowered at the same time. The needle bar 141 descends. At the same time, the elevating rod 231 is also lowered to press the one side of the elevating bracket 223, so that the stopper 225 of the elevating bracket 223 is spaced apart from the upper surface of the main body 163 while stopping the rotation bracket 203. 221 is brought into close contact, and the rotation bracket 203 returns to its original position while rotating in the other direction. Then, as the rotation bracket 203 is rotated to return to the original position, the auxiliary link 215 rotates in the other direction so that the thread guide bracket 209 also returns to the original position.

Then, as shown in FIG. 20, the thread release bracket 195 provided on the needle bar lifting member 143 and spaced apart from the thread moving bracket 183 by a predetermined distance is disposed on the needle bar 141 and the needle bar lifting member 143. Accordingly, as shown in FIG. 21, the needle movement inclined portion 193 formed in the thread movement bracket 183 comes into contact with the lower portion to rotate the thread movement bracket 183 in one direction. At this time, the thread take-up portion 185 of the thread movement bracket 183 passes through the needle hole 9a of the needle 9 and catches the upper thread 3 spanning the hook body 155 to move to the hook body 155. Let's go.

Next, the lifting link 105 is lowered by driving the driving unit 100 so that the needle 9 is located at the bottom dead center of the sewing work section from the thread sewing work section.

At this time, as the lifting link 105 is lowered, the driving pin 111 moves along the lowering profile section of the driving cam 113, so that the actual winding member 25 is mounted as shown in FIGS. 7A and 7B. Winding the upper thread (3) to the force regulator 21 is rotated in one direction, whereby the holding portion 27 of the thread winding member 25 is in communication with the thread supply path (11a) of the thread supply block (11) Return to the first position.

At the same time, as the lifting link 105 descends, the thread take-out lever 81 moves backward from the thread hanger position of the upper thread 3 to the pull-out position of the upper thread 3, and the flap 67 of the thread hanger 63 After sliding the linear part along the linear moving part 93a of the profile part 93 of the draw lever bracket 91 in the state which cut off the opening part 65, it reaches the horizontal moving part 93b of the profile part 93, Then, the flap receiving portion 87 is opened while the free end portion of the pullout lever bracket 91 is gradually rotated apart from the thread takeout lever 81 by sliding along the horizontal moving portion 93b. The flap accommodating part 87 of the lead part 80 is separated.

As soon as the flap 67 deviates from the flap accommodating part 87 of the thread drawing part 80, the drawing lever bracket 91 is rotated to the side of the thread drawing lever 81 by the elastic force of the drawing lever elastic member, thereby turning the original part out of the flap receiving part 87. Restore to the location.

And, as shown in Fig. 11, the thread guide lever 81 so that the thread guide path 15a of the seal guide block 15 communicates with the thread of the grip ends 83a and 83b and the balls 85a and 85b. ) Returns to the original position of the spacer 17.

10C and 11, the upper thread 3 passes through the thread guide path 15a of the upper thread guide block 15 to pass through the thread through hole 85a of the upper grip end 83a. After passing through the flap (67) to change the direction, passing through the through hole (85b) of the lower gripping end (83b) to the needle (9) through the thread guide path (15a) of the lower thread guide block (15) do.

Subsequently, as shown in FIG. 12, when the thread hanger 63 of the thread take-up 60 is positioned at the top dead center by the arm driving unit 75, the upper thread 3 caught by the thread hanger 63 is tensioned. Therefore, the upper thread 3 caught on the thread hanger 63 by the rocking drive of the arm driving unit 75 swings between the bottom dead center and the top dead center, and is tensioned and relaxed.

In addition, as the lifting link 105 descends, the needle bar 141 and the needle bar lifting member 143 descend from the thread sewing work section to the sewing work section, and the upper thread 3 spans the hook body 155 of the thread catcher 151. ) Is inserted into the needle hole (9a) while naturally released from the hook body 155, the thread sewing operation is completed as shown in Figs.

In this way, the upper thread is partially wound on the mounting force adjusting body by the driving of the single driving unit, and the operation of hanging the upper thread on the thread hook portion of the thread take-up can be performed simultaneously, and the needle of the needle is driven by the driving of the single driving unit. It is possible to additionally perform thread sewing in the hole, thereby improving productivity by shortening the time of changing the upper thread, and also reducing the number of parts of the embroidery machine, thereby simplifying the structure and reducing the manufacturing cost.

On the other hand, it is apparent to those skilled in the art that the idea of the present invention can be applied to various sewing machines such as a single needle automatic machine, a multi needle automatic machine, a sewing machine, and the like. will be.

As described above, according to the present invention, the upper thread is partially wound on the mounting force adjusting unit by the driving of a single drive unit, and the upper thread replacement work is shortened by simultaneously performing the operation of hanging the upper thread on the thread hook portion of the thread take-up. In order to improve productivity, the number of parts of the embroidery machine is reduced, and the upper thread supply device for the embroidery machine, which not only has a simple structure but also reduces the manufacturing cost, is provided.

Claims (6)

In the upper thread supply apparatus for embroidery machines for supplying the upper thread from the thread supply unit with a needle, A thread winding adjuster that at least partially winds the upper thread and resists the upper thread, and is mounted on a predetermined rotating shaft to hold and rotate the upper thread at a position spaced apart from the rotation axis to wind the upper thread on the mounting force adjusting member. A mounting force adjusting unit having a catching member and adjusting a tension of the upper thread; A thread take-up unit which has a thread hanger which takes the upper thread and swings a predetermined section and relaxes and relaxes the upper thread; A thread withdrawal lever for reciprocating between the withdrawal position from which the upper thread is withdrawn from the thread movement path and the thread hook position caught by the thread hanger portion; and a thread withdrawal portion for withdrawing the upper thread on the thread movement path and walking to the thread hanger portion; ; A drive unit for rotating the thread winding member and reciprocating the thread draw lever; A rotational motion converting unit for converting the driving motion of the driving unit into a rotational motion to rotate the thread winding member so that the upper thread is wound around the mounting force adjusting member; And a linear motion converting part for converting the driving motion of the driving part into a linear motion and moving the thread takeout lever so that the upper thread is caught by the thread hook part. The method of claim 1, And a lifting link connected to the driving part to move up and down by driving the driving part. The rotational motion conversion unit, A driving pin protruding from one side of the lifting link; A drive cam having a predetermined camp profile to which the drive pin is movably coupled and rotatably coupled to a predetermined rotation shaft; Embroidery upper thread supply device comprising a power transmission member for transmitting the rotational motion of the drive cam to the thread winding member. The method of claim 2, The linear motion conversion unit, A bracket provided in one of the elevating link and the thread drawing part and having a long hole formed at a predetermined angle with respect to the elevating direction of the elevating link; The upper thread supply apparatus for the embroidery machine, characterized in that provided on the other one of the lifting link and the thread lead portion, the moving pin coupled to the long hole to move linearly. The method according to claim 2 or 3, The needle bar on which the needle is mounted is coupled to be liftable, and further includes a needle bar lifting member connected to the lifting link. And the drive unit lifts the needle bar elevating member so that the needle moves up and down the sewing work section to a predetermined thread sewing work section. The method of claim 4, wherein A thread catcher having a hook on which the upper thread is caught and a hook body supporting the hook, the hook reciprocating so as to pass through the needle hole of the needle and sewing the upper thread into the needle hole; And a thread catcher driving link having a thread catcher supporting portion for supporting the thread catcher, and an inclined portion for a pin formed at a predetermined angle with respect to the lifting direction of the lifting link so as to contact the driving pin within the thread sewing work section of the needle. Further comprising a thread catcher driving unit for reciprocating the thread catcher, The driving unit moves the driving pin along the inclined portion for the pin, the thread catcher driving link presses and releases the thread catcher supporting portion to pass the hook through the needle hole of the needle. . The method of claim 5, A thread moving bracket having an inclined portion for a needle bar having a predetermined angle horizontally with respect to a lifting direction of the needle bar, parallel to a plane formed by the needle hole of the needle and the hook, and rotatably installed on a predetermined rotation shaft; A thread release bracket provided on the needle bar elevating member and sliding the thread moving bracket by sliding contact with the inclined portion for the needle bar so as to catch the upper thread caught by the hook and move the hook body; The driving unit lowers the lifting link from the thread sewing work position to the sewing work section to rotate the thread moving bracket by the thread unwinding bracket, and moves the upper thread caught on the hook to the hook body to release it from the hook body. Upper thread supply device for an embroidery machine characterized in that inserted into the needle hole.

Images