JP2002355478A - Sewing machine with thread winding function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the thread end of a needle thread from being pulled to a horizontally rotating shuttle in the case of supplying the needle thread to a bobbin and to surely supply the needle thread to the bobbin. SOLUTION: This sewing machine is provided with a bed part, a vertical body part erected at the rear part of the bed part, an arm part 203 extended parallelly to the bed part and a bobbin winding device. Also, on the tip part of the arm part 203, a thread holding part 220 is provided. The thread holding part 220 is provided with a shaft member 222 fixed to the arm part 203 and a wound spring 223 wound to the shaft member 222. Before the bobbin thread winding device winds the needle thread to the bobbin, an operator clamps the needle thread on a thread end side to the wound spring 223 and thus, the needle thread is held at the thread holding part 220. In the sewing machine, by the rotation of the rotating hook of the bobbin winding device, a sword tip disposed on the rotating hook catches the needle thread from a dropped needle and leads it to the thread hooking means of the bobbin winding device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine having a bobbin function capable of supplying a bobbin with a bobbin stored in a shuttle device.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 11-47480 describes a bobbin thread winding device capable of supplying a bobbin thread to a bobbin in a state where the bobbin is housed in a horizontal shuttle. This bobbin thread winding device can supply the bobbin with either an upper thread or a special thread as the lower thread. And
In this bobbin thread winding device, when the upper thread is supplied, the needle lowers once and the outer shuttle of the horizontal shuttle rotates, so that the upper thread is caught by the tip of the outer shuttle. Then, by further rotating the outer hook, the captured upper thread is hooked on the thread holding / capturing member, and the upper thread can be wound around the bobbin. Then, when the bobbin rotates, the upper thread is wound around the bobbin.

[0003]

However, in the conventional bobbin thread winding device, when the sword captures the upper thread and the captured upper thread is hung on the thread holding / combining member, the rotation of the sword is used. The upper thread is pulled. Therefore, the thread end side of the upper thread may be pulled to the horizontal hook, and the upper thread may not be hooked on the thread holding / capturing member, whereby the upper thread is not wound around the bobbin.

[0004] An object of the present invention is to suppress the yarn end of the upper thread from being pulled to the horizontal shuttle when the upper thread is supplied to the bobbin,
That is, the upper thread is reliably supplied to the bobbin.

[0005]

In order to solve the above-mentioned problems, according to the present invention, as shown in FIGS. 1 to 11, for example, a bed portion (20) having a substantially horizontal bed surface is provided.
1) and a vertical trunk (202) rising from the bed;
An arm portion (203) extending substantially in parallel with the bed portion from the vertical body portion, and a needle bar (2) having a needle (3) protruding downward from a distal end portion of the arm portion and moving up and down. ), An inner pot (18) capable of storing a bobbin (22),
And a shuttle device (horizontal shuttle 4) which accommodates the inner shuttle and is provided with a sword tip, and which is disposed in the bed portion, and guides the upper thread from the thread supply source to the bobbin. And a yarn hooking section (yarn hooking means 48) capable of hanging an upper thread so that the upper thread drawn out from the thread supply source while the bobbin is housed in the inner hook is provided. With the needle hooked, the needle descends into the bed portion, and the outer hook rotates to catch the upper thread from the needle, and the further rotation of the outer hook causes the needle point to capture the upper thread. A sewing machine with a thread winding function in which the upper thread is hooked on the thread hooking section by guiding the needle thread to the thread hooking section, and the bobbin rotates to wind the upper thread. Is provided on the arm portion. And wherein the door.

According to the first aspect of the present invention, the needle descends,
The upper thread is pulled when the tip of the needle captures the upper thread from the needle and the tip of the tip guides the upper thread to the thread hook. Here, since the upper thread on the thread end side of the needle is held by the thread holding section, the upper thread is pulled out from the thread supply source. Therefore,
The rotation of the outer hook allows the sword tip to reliably guide the upper thread to the thread hooking section, and then the upper thread is securely wound around the bobbin. Further, since the yarn end side of the upper thread is held by the yarn holding section, it is not necessary to grip the thread end of the upper thread with a finger so that the thread end of the upper thread is not pulled by the shuttle device.

Further, since the arm holding section is provided with the thread holding section, the work of holding the upper thread on the thread holding section is easy.
For example, if a thread holding section is provided near the needle bar, a hand must be inserted between the bed section and the arm section to hold the thread in the thread holding section. Since members and mechanisms such as a needle bar, a needle, and a presser are provided between the bed and the arm, a hand is inserted between the bed and the arm to hold the yarn. Difficult to hold in the department. However, according to the present invention, since it is not necessary to insert a hand between the bed and the arm, the operation of holding the upper thread in the thread holder is easy.

The invention described in claim 2 is, for example, shown in FIGS.
As shown in FIG. 1, the sewing machine with a thread winding function according to claim 1, wherein the thread holding section is provided with a winding spring (223) wound closely, and is inserted into the winding spring and the arm section. And a fixed shaft portion (shaft member 222).

According to the second aspect of the present invention, the upper thread is held by the winding spring so that the upper thread is held at the thread end. Since the shaft is inserted through the winding spring, the upper thread does not become entangled with the winding spring, and it is easy to remove the upper thread from the winding spring after the upper thread is wound on the bobbin. In addition, since only the configuration includes the winding spring and the shaft portion, the yarn end side of the upper thread can be held at a low cost configuration,
The cost increase of the sewing machine with the thread winding function can be suppressed.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a sewing machine with a thread winding function according to the present invention. However, the drawings are shown schematically,
The scope of the invention is not limited to the illustrated example.

As shown in FIG. 1, the sewing machine with a thread winding function according to the present embodiment is applied to a sewing machine 200 for performing embroidery stitching, and is wound around a bobbin 22 (shown in FIG. 2 and the like) during a thread winding operation. The dedicated thread EDS or the upper thread US can be selected as the lower thread DS (shown in FIG. 4 and the like) to be performed. The sewing machine 200 can supply the lower thread DS to the bobbin 22 without removing the bobbin 22 from the horizontal shuttle 4 (shown in FIG. 2 and the like).

The sewing machine 200 has a bed portion 201 having a substantially horizontal bed surface on an upper surface, a vertical trunk portion 202 rising from a rear portion of the bed portion 201, and a bed portion 201 substantially above the vertical trunk portion 202. An arm 203 extending forward in parallel is provided with a needle bar 2 protruding downward from a front end of the arm 203. A needle bar 2 is provided on the arm 203 so as to be vertically movable, and a needle 3 is fixed to a lower end portion of the needle bar 2. The needle bar 2 and the needle 3 are moved upward by a needle bar mechanism (not shown). It is driven up and down in conjunction with (not shown). Above the arm portion 203, a thread spool storage section 205 for rotatably storing the upper thread spool 204 around which the upper thread US is wound is provided. 205 is detachable. In the sewing machine 200, the upper thread US is led out from the upper thread spool 204 and is guided to the needle 3 via a thread tension (not shown) and the balance device 208. Needle thread US
Is inserted. On the other hand, the bed 201 has a dedicated thread EDS
A thread spool storage section 207 is provided for rotatably storing the thread spool 206 for the dedicated thread wound with the thread.
Reference numeral 6 is detachable from the thread spool storage section 207.
On the right side of the needle bar 2, a presser bar 209 projecting downward and vertically movable is provided at the front end of the arm 203, and a presser 210 is provided at the lower end of the presser bar 209. Then, in order to clamp the cloth (sewn material) between the presser foot 210 and the bed surface, the presser bar 209 is urged downward, and is lifted upward when replacing the cloth. ing.

Further, the sewing machine 200 includes a lower thread winding device for supplying the lower thread DS to the bobbin 22. Hereinafter, the bobbin thread winding device will be described in detail. As shown in FIG. 2 and FIG.
The horizontal shuttle 4 is disposed inside the bed 201 and below the needle bar 2. At the time of sewing, the needle bar 2 moves up and down in conjunction with the upper shaft by the needle bar mechanism, and the horizontal shuttle 4 and the needle 3 cooperate to form a seam on the cloth. In the thread winding operation, a known needle bar cutting-off mechanism (not shown) releases the interlock between the upper shaft and the needle bar 2 by the needle bar mechanism at a predetermined timing. The position is held at the top dead center by the disconnecting mechanism. The upper shaft is connected to a sewing machine motor (not shown), and is rotated by the sewing machine motor.

The horizontal shuttle 4 has the following configuration. That is, the horizontal shuttle 4 has a bed portion 20 as a basic configuration.
An outer hook 7 rotatably attached to a hook mounting base 10 fixed to 1 and an inner hook 18 housed in the outer hook 7 are provided. A screw gear 8 is fixed to a lower portion of the outer hook 7, and the screw gear 8 meshes with a gear (not shown) fixed to a lower shaft (not shown). The outer hook 7 is configured to rotate when the lower shaft rotates in conjunction with the upper shaft.

The outer hook 7 is formed in a substantially cylindrical shape, and has a bottom surface at a lower portion inside the cylindrical portion. An opening 45 is formed on the outer peripheral surface of the outer hook 7. A sword tip 42 is provided on the inner surface of one of the openings 45 (the side opposite to the arrow A).
Is provided, and the other of the openings 45 (on the arrow A side)
A cutting blade 43 is provided on the inner surface of the. A jig portion 44 is provided below the opening 45. Cutting blade 43
Is fixed to the outer peripheral surface of the outer hook 7 in a direction substantially opposite to the sword tip 42 in a tangential direction, and an incision portion 44 is disposed between the sword tip 42 and the cutting blade 43. The sword point 42 captures an upper thread loop formed by the upper thread US hooked on the needle 3 when the needle 3 descends when the outer shuttle 7 rotates in the direction of arrow A. The threading part 44 is for threading the needle thread US and the special thread EDS into the cutting blade 43 after the needle thread US and the special thread EDS are wound around the bobbin 22, and the threaded needle thread US and the special thread EDS. The EDS is cut by a cutting blade 43. When the needle 3 is lowered, the needle 3 falls to the right inside the outer hook 7. That is, the rotation axis of the outer shuttle 7 is located to the left of the needle 3.

On the outer peripheral surface of the outer shuttle 7, a thread catching hook 46 is provided so as to project therefrom. The thread catching hook 46 is fixed to the outer peripheral surface of the outer shuttle 7 in a direction substantially opposite to the tangent to the blade tip 42. The yarn catching hook 46 is for catching the yarn in the outer hook 7 when the outer hook 7 rotates in the direction opposite to the arrow A, and also, when the outer hook 7 rotates in the arrow A direction, the yarn is held in the outer hook 7. Extruded in a direction away from the outer peripheral surface.

Inside the outer kettle 7 which is substantially cylindrical, an inner kettle 18 having an upper portion formed substantially on a cup having an opening is disposed. The inner pot 18 is arranged such that the axis of the inner pot 18 is shifted to the left with respect to the axis of the outer pot 7, and the inner pot 18 is rotatable about its axis so that the outer pot 7 is rotatable. It is supported by. The upper end of the inner pot 18 is located above the upper end of the outer pot 7. At the upper end of the outer peripheral surface of the inner pot 18, there is provided a projection 19 projecting above the upper end of the outer pot 7. A first stopper 20 is fixed to the bed 201 on the side of the projection 19 in the direction of the arrow A, and a flexible second stopper 21 is fixed on the side of the projection 19 in the direction opposite to the arrow A.
The inner shuttle 18 rotates with the outer shuttle 7 in the same direction due to friction with the outer shuttle 7 when the outer shuttle 7 rotates. When the inner pot 18 rotates in the direction of arrow A,
By the projection 19 abutting on the first stopper 20,
The rotation of the inner pot 18 is stopped. On the other hand, when the inner pot 18 rotates in the direction opposite to the arrow A, the projection 19
Is brought into contact with the second stopper 21 so that the inner hook 18
The rotation of is stopped.

The outer peripheral edge of the inner pot 18 has a concave groove 18a.
Is formed, and a space exists between the inner pot 18 and the outer pot 7 in the concave groove 18a. When the protrusion 19 is in contact with the first stopper 20, the concave groove 18a is located immediately below the needle 3, and when the needle 3 falls, a loop of the upper thread US is formed in the concave groove 18a. Is done. Then, the sword tip 42 catches the loop of the upper thread US when it moves to the vicinity of the concave groove 18a. Hereinafter, the position of the tip 42 when the tip 42 captures the loop of the upper thread US is referred to as a capture position.

Further, a bobbin storage hole 23 in which the bobbin 22 is stored is formed in a shaft center inside the inner hook 18. A lower thread tension means 25 is provided in a part of the upper part of the bobbin storage hole 23 in the circumferential direction. The lower thread tension means 25 is a part of the inner surface of the bobbin storage hole 23. The bobbin thread tension means 25 is for applying an appropriate tension to the bobbin thread DS during sewing, and has a substrate 26 formed in an arc shape as shown in FIG. Substrate 2
The inner peripheral surface 6 has substantially the same curvature as the inner diameter of the bobbin storage hole 23 or has a curvature slightly larger than the inner diameter of the bobbin storage hole 23 so as to form a part of the inner surface of the bobbin storage hole 23. I have. In the substrate 26, a threading slit 28 descending from the upper edge of the substrate 26 in the direction opposite to the arrow A is provided.
Are formed. At the end of the threading slit 28, the substrate 2
6, the thread locking hole 29 penetrating in the thickness direction is formed in the thread hook slit 2.
8 are formed continuously. Further, a groove-shaped thread outlet 30 is formed on the upper end edge of the substrate 26 on the side opposite to the arrow A of the thread locking hole 29. Also, the leaf spring 31
The plate spring 31 is attached to the outer peripheral surface of the substrate 26 by mounting screws 32 and is in close contact with the outer peripheral surface of the substrate 26 by the urging force.

As shown in FIGS. 1 and 2, the bobbin 22
Is detachable from the bobbin storage hole 23.
The bobbin 22 includes a center shaft 36 serving as a rotation shaft, and a substantially disk-shaped upper flange 37 formed at the upper end of the center shaft 36.
And a substantially disk-shaped lower flange 38 formed at the lower end of the central shaft 36. The upper flange 37 faces the lower flange 38. The lower thread DS is wound around the center shaft 36. A bobbin driven gear 35 is provided on the lower end surface of the lower flange 38 on the extension of the central shaft 36. Further, a slit 39 opened at the outer peripheral edge of the upper flange 37 is formed so as to penetrate the upper flange 37 vertically.

On the other hand, the shaft center of the screw gear 8 and the hook mount 1
A bobbin drive shaft 11 penetrates vertically through 0, and the bobbin drive shaft 11 is rotatable with respect to the screw gear 8 and the shuttle mount 10, and is also movable vertically. The lower end of the bobbin drive shaft 11 protrudes downward from the hook mount 10. At the lower end of the bobbin drive shaft 11,
The end of the biasing spring 12 in a compressed state is fixed, and the other end of the biasing spring 12 is in contact with the lower end of the shuttle mount 10. The biasing spring 12 is provided on the bobbin driving shaft 1.
1 is urged downward.

A bobbin driving gear 14 is fixed to an upper end of the bobbin driving shaft 11. This bobbin drive gear 14
Are always meshed with a gear hole (not shown) formed to penetrate the bottom of the outer hook 7 vertically, and the bobbin drive gear 14 and the bobbin drive shaft 11 rotate with the outer hook 7. I have. The bobbin driving gear 14 is slidable up and down with respect to this gear hole. Further, a through hole (not shown) penetrating vertically is formed on the bottom surface of the inner pot 18, and the bobbin driving gear 14 penetrates into the bobbin housing hole 23 from below through the through hole. When the bobbin drive shaft 11 moves upward against the biasing force of the biasing spring 12 when the bobbin 22 is stored in the bobbin storage hole 23, the bobbin drive gear 14
The second bobbin driven gear 35 meshes with the second bobbin driven gear 35.
Even when the bobbin driving gear 14 meshes with the bobbin driven gear 35, the bobbin driving gear 14 meshes with the gear hole of the outer shuttle 7. On the other hand, when the bobbin drive shaft 11 moves downward by the urging force of the urging spring 12, the bobbin driving gear 14
And the bobbin driven gear 35 are disengaged from each other.

As shown in FIGS. 2 to 3 and FIGS. 5 to 6, the lower thread winding device 1 includes a thread hooking means 48 disposed behind the horizontal shuttle 4. A special thread EDS or upper thread US is used as the lower thread DS supplied to the bobbin 22 during the thread winding operation.
Even if either one of the above is selected, the thread hooking means 4
8 can hold or hang one of the special thread EDS and the upper thread US. Less than,
The thread hooking means 48 will be described in detail. That is, the thread hooking means 48 is configured by attaching various members to a plate-shaped attachment member 49. The attachment member 49 includes a substantially plate-shaped support portion 50 extending on a substantially vertical surface, a substantially plate-shaped first extension portion 51 extending rightward from a lower end of the support portion 50, A second extending portion 52 extending upward from the front end of the right end portion of the extending portion 51 and a yarn holding hook portion 53 extending forward from the upper end of the second extending portion 52. ing.

On the upper surface of the rear end of the thread holding hook 53, a thread guide tongue piece 54 is formed to protrude upward. In front of the thread guide tongue piece 54, the thread holding leaf spring 70
Thus, it is closely attached to the upper surface of the yarn holding hook 53. Then, as shown in FIG. 6, when viewed from the side, the thread holding hook 53 and the thread holding leaf spring 70 are formed in two steps and are formed in a substantially stepped shape.

At the rear end of the thread holding leaf spring 70, an approximately saw blade-shaped upper hanging groove 71 is formed on the left edge of the thread holding leaf spring 70. A hook groove 55 having substantially the same shape as the upper hook groove 71 is formed substantially at the center of the yarn holding hook portion 53 in the front-rear direction, and the upper hook groove 71 and the hook groove 55 substantially coincide with the front, rear, left and right. . At a position adjacent to the front of the hook groove 55, a rear tongue piece 56 is formed in the thread holding hook 53 so as to extend leftward. Thereafter, the tongue piece 56 is bent so as to be inclined downward. After this, the tongue piece 56
The upper rear tongue piece 72 is formed on the left edge of the thread holding leaf spring 70 so as to be positioned above the left side. This tongue piece 72
Is bent so as to be inclined upward.

In front of the rear tongue piece 56, a projecting portion 57 projecting to the left is provided at an appropriate interval with a thread holding hook 53
Is formed. A front tongue piece 58 extending rearward is formed on the left side of the protrusion 57, and the front tongue piece 58 is bent so as to be inclined upward. The projecting portion 57 and the front tongue piece 58 do not overlap with the thread holding leaf spring 70. Further, the thread holding hook 53 is provided with a protrusion 57
And an extending portion 60 extending forward from the upper end of the upright portion 59. The upright portion 59 has a stepped shape extending from the upper end of the upright portion 59 toward the front. It has become. The extending portion 60 is formed so that the left-right width becomes smaller toward the front from the upper end of the upright portion 59, and the front end of the extending portion 60 is a blade portion 61.

On the other hand, the front portion of the thread holding leaf spring 70 overlaps with the upright portion 59 and a part of the extending portion 60 to form a step. The right edge of the front portion of the thread holding leaf spring 70 is inclined to the left as it goes forward, and a convex portion 73 protruding rightward is formed in the middle thereof. The right edge of the thread holding leaf spring 70 is bent at the convex portion 73. The projecting portion 73 overlaps with the extension portion 60, and the distal end portion 74 of the thread holding leaf spring 70 does not overlap with the blade portion 61, and the distal end portion 74 is disposed on the left side of the blade portion 61. Then, in plan view, the right edge of the thread holding leaf spring 70 and the left edge of the extension 60 intersect. Hereinafter, the crossing point is referred to as a locking point 120.

On the other hand, at the rear end of the thread holding leaf spring 70, a hook groove 75 is formed on the right edge of the thread holding leaf spring 70. In a position adjacent to the rear of the hanging groove 75,
The threading tongue piece 76 extending rightward is a thread holding leaf spring 70.
Is formed at the right end. The threading tongue piece 76 is bent so as to be inclined upward.

As shown in FIGS. 2 and 3, the lower thread winding device 1 further includes a moving means 80 for moving the yarn hooking means 48. The moving means 80 is provided at the front end of the yarn hooking means 48. Is moved between an initial position separated from the horizontal shuttle 4 rearward and a close position close to the horizontal shuttle 4 above the horizontal shuttle 4. Further, this moving means 80
Moves the bobbin drive shaft 11 up and down so that the bobbin drive gear 14 and the bobbin driven gear 35 can mesh and release the mesh. Hereinafter, the moving means 80 will be described in detail.

The moving means 80 includes a guide member 81 fixed to the bed 201, a first drive member 84 movably attached to the guide member 81, and a first drive member 84. A second driving member 87 movably attached to the front and rear, and a motor 93 serving as a power source.

The guide member 81 is a plate-shaped member, and the guide member 81 has a first cam groove 82 penetrating right and left. The first cam groove 82 includes a horizontal portion 82a which is long in the front and rear direction and is formed substantially horizontally, and an arc portion 82b which is convex toward the rear and formed in a substantially arc shape. The arc portion 82b is elongated in the vertical direction, and is continuous with the rear end of the horizontal portion 82a at an intermediate portion thereof. On the other hand, a front pin 77 and a rear pin 78 protruding leftward are provided on the support portion 50 of the attachment member 49 at appropriate intervals. And the front pin 77 and the rear pin 78
The first cam groove 82 is slidable along the first cam groove 82 and is fitted in the first cam groove 82. Thereby, the thread hooking means 48
Is guided by the first cam groove 82 and is movable with respect to the guide member 81. The front pin 77 is disposed in front of the rear pin 78, and the front pin 77 and the rear pin 78
Is substantially parallel to the extension 60 of the thread hooking means 48. In a state where the rear pin 78 is located at the upper end of the arc portion 82b and the front pin 77 is located at the middle of the horizontal portion 82a, the front end of the thread hooking means 48 is located at the initial position.

Below the first cam groove 82, a second cam groove 83 penetrating left and right is formed in the guide member 81, and the second cam groove 83 is elongated horizontally and formed substantially horizontally. ing. On the other hand, the first drive member 84 is a plate-shaped member, and slide pins 85, 85 protruding rightward are provided on the right surface of the first drive member 84. Sliding pin 85,
85 is slidably fitted in the second cam groove 83.

At the rear end of the first drive member 84, a guide rod 86 extending in the front-rear direction is fixed to the upper end of the first drive member 84. A plate-shaped second drive member 87 is slidably inserted in and out of the guide rod 86. A spring 88 is inserted through the guide rod 86. One end of the spring 88 is connected to the first drive member 84, and the other end of the spring 88 is connected to the second drive member 87. . The spring 88 urges the second drive member 87 forward with respect to the first drive member 84, and the urged second drive member 87 is moved forward by a stopper 89 provided on the first drive member 84. Movement to is deterred. The second drive member 87 does not rotate with respect to the first drive member 84 about the guide rod 86.

The second driving member 87 has a third cam groove 90 which is inclined downward from the front to the rear. A rear pin 78 is in contact with the third cam groove 90, and the rear pin 78 is slidable with respect to the third cam groove 90. When the second drive member 87 moves forward,
The rear pin 78 moves downward along the arc portion 82b by the third cam groove 90.

On the other hand, at the lower end of the first driving member 84, racks 91 arranged in front and rear are formed. A pinion 92 meshes with the rack 91, and the pinion 9
2 is directly connected to the drive shaft of the motor 93. The motor 93 is fixed to the bed 201, and the first driving member 84 is moved back and forth by the motor 93.

On the other hand, as shown in FIGS. 2, 3, and 7, at the front portion of the guide member 81, the intermediate portion of the link 94 is rotatable about an axis 95 extending in the left-right direction, and is guided. It is attached to the lower end of the member 81. An operation plate 96 is provided at the front end of the link 94.
Extends below the bobbin drive shaft 11 from the front end of the link 94. One end of a tension spring 97 is hung on the operation plate 96, and the other end of the tension spring 97 is
It is hung on. A stopper pin 107 is disposed below the operation plate 96, and the stopper pin 107 is fixed to a front end of the guide member 81. And the tension spring 97 urges the operation plate 96 downward,
The downward movement of the operation plate 96 is suppressed by the contact of the operation plate 96 with the stopper pin 107. In this state, the operation plate 96 is separated from the lower end of the bobbin drive shaft 11.

A cam 98 is formed at the upper end edge of the rear portion of the link 94 so as to be inclined downward toward the rear. Below the cam 98, a vertically extending contact edge 99 is formed in the link 94, and a groove 100 that is concave from the upper end of the contact edge 99 toward the front is formed in the link 94. On the other hand, below the shaft 95, an intermediate portion of the stopper member 102 is provided with a shaft 1 extending in the left-right direction.
It is rotatable around 01 and attached to the lower end of the guide member 81. At one end of the stopper member 102, a stopper rod 104 extending left and right is provided. The other end of the stopper member 102 has a tension spring 10
3 is hooked, and the other end of the tension spring 103 is hooked on the bed 201. Then, the tension spring 103 urges the other end of the stopper member 102 downward, and the stopper rod 104 contacts the contact edge 99, whereby the rotation of the stopper member 102 is suppressed.

On the other hand, an operating arm 105 is fixed to the front end of the first driving member 84, and the operating arm 105 is disposed in front of the stopper rod 104. Further, an operation pin 106 is fixed to a front and rear intermediate portion of the first drive member 84,
The operating pin 106 is located behind the cam 98. When the first drive member 84 moves forward, the operating pin 106 comes into contact with the cam 98 and pushes down the rear portion of the link 94. As a result, the operation plate 96 rises against the urging force of the tension spring 97, and the operation plate 96
Thereby, the bobbin drive shaft 11 is pushed up. When the rear portion of the link 94 is pushed down, the contact between the stopper rod 104 and the contact edge 99 is released, and the stopper rod 104 is locked in the groove 100 by the urging force of the extension spring 103. I have. Thus, even when the first drive member 84 moves rearward and the operation pin 106 separates from the cam 98, the operation plate 96 is not pressed down by the urging force of the tension spring 97. From this state, when the first drive member 84 moves further backward together with the operation arm 105, the operation arm 105
Pushes the stopper rod 104 backward, the locking of the groove 100 and the stopper rod 104 is released, and the tension spring 97
The actuation plate 96 is pushed down by the urging force of.

Further, as shown in FIG.
Is the upper thread U when the upper thread US is supplied as the lower thread DS.
The thread holding section 220 for holding the thread end side of S is provided.
The thread holding section 220 is provided at the front end of the arm section 203. Specifically, the thread holding section 220 is disposed to the right and forward of the needle bar 2, and is disposed to the right and forward of the capturing position when the blade 42 captures the upper thread US. As shown in FIG. 9 to FIG.
Reference numeral 20 denotes a support plate 221, a shaft member 222, and a coil spring 2
23.

At the lower right corner of the front end face of the arm 203,
A protruding portion 224 protruding forward is formed,
A thread guiding slit 225 is formed at the rear of the protruding portion 224 so as to extend along the front end surface of the arm portion 203, and the thread guiding slit 225 opens upward. An opening 226 penetrating from the yarn guiding slit 225 to the internal space of the arm 203 is formed on the front end surface of the arm 203. In the internal space of the arm 203, the support plate 221 is
It is fixed to 3. A shaft member 222 extending forward and backward is fixed to the support plate 221, and the shaft member 222 passes through the opening 226 and extends to the yarn guiding slit 225. The rear part of the shaft member 222 is a large-diameter large-diameter shaft part 222a.
The front portion of the shaft member 222 is a large-diameter shaft portion 222a.
The smaller diameter shaft portion 222b has a smaller diameter. The small diameter shaft portion 222b is eccentric with respect to the large diameter shaft portion 222a, and the axis of the small diameter shaft portion 222b is lower than the axis of the large diameter shaft portion 222a. The shaft member 222 is inserted through a wound spring 223 wound closely. Then, the winding spring 223 comes into close contact with the large-diameter shaft portion 222a by its urging force, so that the winding spring 223 is almost fixed to the shaft member 222. The upper side of the small-diameter shaft portion 222b is separated from the coil spring 223.

The sewing machine 200 is provided with a control device for controlling the entire machine. The control device operates and stops the motor 93, the sewing machine motor, and the needle bar disconnection mechanism at a predetermined timing, And the drive speed of the motor 93 and the sewing machine motor.

Next, the operation of the sewing machine 200 will be described. First, a description will be given of a thread winding operation when a dedicated thread EDS is supplied to the bobbin 22 as the lower thread DS.

Before the thread winding operation is started, the sliding pin 85 after (1) is located at the rear end of the second cam groove 83, (2) the front pin 77 is located at the middle of the horizontal portion 82a, and 3) The rear pin 78 is located at the upper end of the arc portion 82b and the front end of the third cam groove 90, (4) the operating pin 106 is located rearward from the cam 98, and (5) the stopper rod 104 is The needle 3 is in contact with the contact edge 99, and (6) the needle 3 has not fallen and is located almost at the top dead center. As a result, the operating plate 96 is separated downward from the bobbin drive shaft 11, and the front end of the thread hooking means 48 is located behind the horizontal shuttle 4, that is, at the initial position. 2 and FIG.

The special thread EDS derived from the special thread spool 206 is guided to the thread tension. The dedicated yarn EDS guided to the thread tension is guided in the following order toward the yarn end in the yarn hooking means 48. That is, the special thread EDS is (1) hooked on the thread guide tongue piece 54,
(2) hooked on the lower part of the thread hooking tongue piece 76;
5 to the upper surface of the thread holding leaf spring 70, (4) from the rear end of the projection 57 to the lower surface of the projection 57, (5)
Guided from the lower end of the upright portion 59 (hereinafter, referred to as a support portion 121) to the convex portion 73, (6) between the convex portion 73 and the extending portion 60 (hereinafter, referred to as a thread clamping portion 122). It is held in the sandwiched state, and (7) it is guided to the upper surface of the extension portion 60 and becomes a yarn end.

First, the first drive member 84 and the second drive member 87 move forward along the second cam groove 83 by the forward rotation drive of the motor 93. By the advance of the second drive member 87,
The rear pin 78 is pushed down along the arc portion 82b, and the thread hooking means 48 rotates around the front pin 77 clockwise as viewed from the direction of FIG. Thereby, the thread hooking means 48
At the position where the front end of the
The bobbin 22 is located above the upper flange 37. In addition,
The position of the leading end of the thread hooking means 48 in this state will be referred to as a separated position.

Further, when the first driving member 84 and the second driving member 87 move forward by the driving of the motor 93, the thread hooking means 48 moves forward along the horizontal portion 82a, and the front pin 77 moves to the front end of the horizontal portion 82a. By contact, the thread hooking means 48
Is stopped at a position above the inside of the inner hook 18 (a proximity position close to the bobbin 22). When the thread hooking means 48 has entered the close position, the extending portion 60, the blade portion 61, and the tip portion 74 are located on the upper flange 37, and the upright portion 59 is located behind the outer peripheral edge of the upper flange 37. The lower end of the upright portion 59 is located below the lower surface of the upper flange 37. Therefore, the exclusive thread EDS connecting the support section 121 and the thread holding section 122 is pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22.

The first drive member 84 moves forward by the further drive of the motor 93 (the second drive member 87 does not move forward).
As a result, the operating pin 106 pushes down the cam 98. As a result, the link 94 rotates, the operation plate 96 abuts on the lower end of the bobbin drive shaft 11, and the operation plate 96 pushes up the bobbin drive shaft 11 against the urging force of the urging spring 12, and as a result, the bobbin The driving gear 14 meshes with the bobbin driven gear 35. At the same time, the stopper rod 104 and the contact edge 99
The stopper rod 104 is released from contact with the groove 100.
This prevents the operating plate 96 from being separated from the lower end of the bobbin drive shaft 11 by the urging force of the tension spring 97. At this time, the motor 93 stops.

Next, the needle bar disconnecting mechanism releases the link between the upper shaft and the needle bar 2 by the needle bar mechanism. Next, the forward rotation of the sewing machine motor causes the outer hook 7 via the upper shaft and the lower shaft.
Rotates forward (rotates in the direction of arrow A), the bobbin drive shaft 11 and the bobbin drive gear 14 rotate forward together with the outer shuttle 7, and the bobbin 22 rotates in the reverse direction (rotates in the direction opposite to the arrow A). Since the exclusive thread EDS is pressed against the outer peripheral edge of the upper flange 37, the exclusive thread EDS is caught by the slit 39 by the reverse rotation of the bobbin 22, and the exclusive thread EDS is wound around the central shaft 36. When the bobbin 22 further rotates in the reverse direction, the special thread EDS is wound around the central shaft 36 and pulled out from the special thread spool 206. And
When the winding amount of the dedicated thread EDS (bobbin thread DS) wound on the bobbin 22 reaches a predetermined thread winding amount, the sewing machine motor stops, and the rotation of the bobbin 22 and the outer shuttle 7 also stops.

Next, the first drive member 84 and the second drive member 87 are moved rearward by the reverse rotation of the motor 93, and the front end of the thread hooking means 48 returns to the initial position. When the front end of the thread hooking means 48 returns to the initial position, the motor 9
3 stops. Until the motor 93 stops, the operating arm 105 does not come into contact with the stopper rod 104, and the stopper rod 104 is kept locked in the groove 100. Therefore, the bobbin 22 remains fixed until the thread hooking means 48 returns to the initial position. Then, when the thread hooking means 48 returns to the initial position, the exclusive thread EDS between the bobbin 22 and the thread hooking means 48 is bent downward at the upper end of the outer peripheral edge of the outer hook 7,
Is locked at the locking point 120 of Next, the sewing machine motor drives the upper shaft to rotate forward by one rotation of the upper shaft. The outer hook 7 rotates forward, and the thread catching hook 46 pushes the dedicated thread EDS between the upper end of the outer peripheral edge of the outer hook 7 and the locking point 120 in a direction away from the outer peripheral surface of the outer hook 7. For this reason, the exclusive yarn EDS is held by the yarn holding portion 122.

Next, by the reverse rotation of the motor 93,
The operating arm 105 moves rearward together with the first drive member 84, and the operating arm 105 pushes the stopper rod 104 rearward, so that the engagement between the groove 100 and the stopper rod 104 is released. As a result, the operation plate 96 and the bobbin drive shaft 11 are lowered, and the engagement between the bobbin drive gear 14 and the bobbin driven gear 35 is released. Then, the motor 93 stops. Next, the outer hook 7 rotates in the reverse direction by the reverse rotation drive of the sewing machine motor, and the thread catching hook 46 catches the dedicated thread EDS between the bobbin 22 and the thread hooking means 48. When the outer shuttle 7 further rotates in the reverse direction, the dedicated thread EDS between the thread catching hook 46 and the bobbin 22 is inserted into the thread catch slit 28 of the substrate 26 by the thread catching hook 46. By the further reverse rotation of the outer hook 7, the exclusive thread EDS between the thread catching hook 46 and the bobbin 22 is moved to the thread locking hole 29 of the substrate 26 and the thread outlet 3.
0, it is sandwiched between the leaf spring 31 and the substrate 26. Further reversal of the rotation of the outer hook 7 causes the yarn catching hook 4
The special thread EDS between the thread hook 6 and the thread hooking means 48 is wound around the outer peripheral surface of the outer hook 7 and the cutting blade 4
3 and pressed against the cutting blade 43 to be cut. Next, the sewing machine motor stops, and the needle bar disconnection mechanism connects the upper shaft and the needle bar 2. Thus, one thread winding operation is completed.

Next, the thread winding operation when the upper thread US is supplied to the bobbin 22 as the lower thread DS will be described.

Before starting the bobbin winding operation, the lower bobbin winding device 1
Is in a state as shown in FIG. 2 or FIG.
Is located at the initial position.

First, the operator prepares for thread winding. That is, the operator uses the needle thread US derived from the needle thread spool 204 to transfer the needle thread US via the thread tension and the balance device 208 to the needle 3.
And thread the needle thread US through the hole of the needle 3. Then, the operator guides the upper thread US from the needle 3 to below the presser foot 210, lowers the presser foot 210, and sandwiches the upper thread US between the presser foot 210 and the bed surface. And the upper thread US presser foot 21
It is guided from 0 to the yarn holding section 220. In the thread holding section 220, the operator passes the upper thread US from above through the thread guiding slit 225, and sandwiches the upper thread US between the winding springs 223.
Since the shaft member 222 is inserted through the winding spring 223, the upper thread US abuts on the shaft member 222, and
Cannot move below 22. Therefore, the winding spring 223
The upper thread US does not get entangled in The upper thread US is set when the upper thread US is set.

As described above, the upper thread US is set,
After holding the thread end side of the upper thread US with the thread holding section 220,
The thread winding operation starts.

First, the forward drive of the motor 93 causes the first drive member 84 to move forward along the second cam groove 83,
The second drive member 87 also moves forward. As the second drive member 87 advances, the rear pin 78 is moved by the third cam groove 90 from the upper end of the arc portion 82b to the rear end of the horizontal portion 82a.
, The thread hooking means 48 rotates clockwise about the front pin 77. As a result, the front end of the yarn hooking means 48 is located at the separated position.

Further, when the motor 93 advances the first driving member 84, the rear pin 78 is pushed forward by the second driving member 87, whereby the front pin 77 and the rear pin 78 are moved.
Moves forward along the horizontal portion 82a, and the thread hooking means 48 moves forward. Then, when the front pin 77 abuts on the front end of the horizontal portion 82a, the front end of the thread hooking means 48 stops in a state in which it enters inside the inner hook 18 (close position). When this state is reached, the motor 93 stops. In the state where the thread hooking means 48 has entered the close position, the extension 60, the blade 61, and the tip 74 are located on the upper flange 37,
The upright portion 59 is located behind the outer peripheral edge of the upper flange 37,
The lower end of the upright portion 59 is located below the lower surface of the upper flange 37.

Next, the sewing machine motor rotates the upper shaft by one rotation. During one rotation of the upper shaft, the needle 3 is
a, the outer hook 7 makes one rotation in the direction of arrow A, and the rotation of the outer hook 7 causes the blade 42 to move from the needle 3 to the upper thread US.
And the upper thread US is guided to the tip of the thread hooking means 48. That is, when the needle 3 rises from the concave groove 18a, the blade 42 moves to the capturing position and captures the upper thread US derived from the needle 3. Here, since the yarn end side of the upper yarn US is held by the yarn holding portion 220, that is, to the right of the needle 3, when the needle 3 falls into the groove 18a, the yarn is pulled from the groove 18a. The path of the needle thread US to the end intersects the rotation orbit of the sword tip 42. That is, since there is a path for the upper thread US surely at the capturing position, the sword tip 42 can surely capture the upper thread US, and the loop of the captured upper thread US is not twisted,
Hitch stitching is prevented. By the further rotation of the sword tip 42, the loop of the upper thread US is divided into upper and lower portions of the inner shuttle 18, the upper thread US on the thread end side passes over the inner shuttle 18, and the upper thread US of the needle 3 is moved. It passes through a gap between the inner hook 18 and the bobbin drive gear 14 (FIG. 12).

Further rotation of the sword tip 42 causes the inner pot 18 to rotate.
The upper thread US passing through the upper part is inserted into the locking point 120. By the further rotation of the sword tip 42, the upper thread US passing over the inner hook 18 passes below the protrusion 57 and is placed on the rear tongue 5
6 and the upper rear tongue piece 72. Thereafter, the upper thread US comes off from the inner hook 18 and is hooked on the hook groove 55 and the upper hook groove 71. In a state where the upper thread US is hooked on the thread hooking means 48 (detailed in FIGS. 5 and 6), the upper thread US is moved between the needle 3, the upper hook groove 71, the rear tongue piece 56 and the upper rear tongue piece 72. , Protrusion 5
7, the lower end of the upright portion 59 (the support portion 121) and the locking portion 120 are guided in this order, and reach the yarn end. Also, the support portion 1
The upper thread US connecting the portion 21 and the locking portion 120 is pressed against the outer peripheral edge of the upper flange 37 of the bobbin 22.

Next, the needle bar disconnecting mechanism releases the interlock between the upper shaft and the needle bar 2 by the needle bar mechanism.

Next, the forward drive of the motor 93 causes the first drive member 84 to move forward along the second cam groove 83 against the spring 88, but the front pin 77 moves to the front end of the horizontal portion 82a. Because of the contact, the thread hooking means 48 and the second driving member 87 do not move forward. When the operating pin 106 moves forward together with the first drive member 84, the operating pin 106
8 and depress the rear part of the link 94. As a result, the link 94 rotates, the operating plate 96 contacts the lower end of the bobbin drive shaft 11, and the operating plate 96 pushes up the bobbin drive shaft 11 against the urging force of the urging spring 12. When the bobbin drive shaft 11 is pushed up, the bobbin drive gear 14 meshes with the bobbin driven gear 35. At this time, at the same time, the contact between the stopper rod 104 and the contact edge 99 is released, and the stopper rod 104 is locked in the groove 100 by the urging force of the pulling spring 103, whereby the operating plate 96 is pressed by the urging force of the tension spring 97. From the lower end of the bobbin drive shaft 11. When this state is reached, the motor 93 stops.

Next, by the forward rotation of the sewing machine motor,
The outer shuttle 7 rotates forward through the upper shaft and the lower shaft, the bobbin drive shaft 11 and the bobbin drive gear 14 rotate forward with the outer shuttle 7, and the bobbin 22 rotates reversely.

Here, since the upper thread US is pressed against the outer peripheral edge of the upper flange 37, the upper thread US is caught by the slit 39 by the reverse rotation of the bobbin 22, and the upper thread US is wound around the central shaft 36. Will be done. When the bobbin 22 further rotates in the reverse direction, the upper thread US is unwound from the upper thread spool 204 and wound around the center shaft 36. While the upper thread US is being wound, the upper thread US is rubbed by the blade portion 61 and cut between the thread end and the bobbin 22. Then, when the winding amount of the upper thread US (the lower thread DS) wound around the bobbin 22 reaches a given thread winding amount, the sewing machine motor stops.

Next, the first drive member 84 and the second drive member 87 are moved rearward by the reverse rotation of the motor 93, and the front end of the thread hooking means 48 returns to the initial position. By the further reverse rotation of the motor 93, the operating arm 105 moves backward together with the first drive member 84, and the operating arm 105 pushes the stopper rod 104 backward, so that the engagement between the groove 100 and the stopper rod 104 is released. Therefore, the tension spring 9
7, the operating plate 96 is pushed down, and the bobbin drive shaft 11 is pushed down by the urging force of the urging spring 12, so that the engagement between the bobbin driving gear 14 and the bobbin driven gear 35 is released. Then, the motor 93 stops.
Next, the outer hook 7 is rotated in the reverse direction by the reverse rotation drive of the sewing machine motor, and the thread catching hook 46 is connected to the bobbin 22 and the thread hooking means 4.
8 to catch the upper thread US. When the outer hook 7 further rotates in the reverse direction, the upper thread US between the thread catching hook 46 and the bobbin 22 is rotated.
Is inserted into the threading slit 28 of the substrate 26 by the thread catching hook 46. By further reverse rotation of the outer hook 7, the upper thread US between the thread catching hook 46 and the bobbin 22 is moved.
Is sandwiched between the leaf spring 31 and the board 26 between the thread locking hole 29 of the board 26 and the thread outlet 30. By the further reverse rotation of the outer hook 7, the upper thread US between the thread catching hook 46 and the thread hooking means 48 is wound around the outer peripheral surface of the outer hook 7,
It is squeezed into the cutting blade 43 by the cutting portion 44 and pressed against the cutting blade 43 to be cut. And
The sewing machine motor stops and the needle bar disconnection mechanism uses the upper shaft and needle bar 2
And concatenate. Thus, one thread winding operation is completed.

According to the above-described embodiment, the upper thread US is pulled when the upper thread US is caught by the sword tip 42 and is hooked on the tip of the thread hooking means 48. Since the upper thread US is held by the holding section 220, the upper thread US is pulled out from the upper thread spool 204. That is, since the thread end of the upper thread US is not pulled to the horizontal shuttle 4 and the upper thread US does not come off from the blade point 42, the upper thread US is securely hooked on the thread hooking means 48. Therefore, the needle thread US is reliably wound around the bobbin 22 by the subsequent rotation of the bobbin 22.

Further, since the thread end of the upper thread US is held by the thread holding section 220 before the thread winding operation is started, during the thread winding operation, particularly, the sword tip 42 catches the upper thread US and the thread hooking means 4
It is not necessary to grasp the thread end of the upper thread US with a finger so that the thread end of the upper thread US is not pulled to the horizontal shuttle 4 when the thread is wound on the hook 8.

Further, since the thread holding section 220 is disposed to the right and forward of the needle bar 2 (capture position), a good needle thread loop is formed when the needle 3 descends, and It becomes easy to catch the upper thread.

Further, since the thread holding section 220 is provided on the front end surface of the arm section 203, there is a space margin around the thread holding section 220. Therefore, the work of holding the yarn end of the upper thread US in the yarn holding section 220 is easy.

Further, since the structure of the thread holding section 220 is only the structure of the winding spring 223 and the shaft member 222, the thread end side of the upper thread US can be held at a low cost, and the cost of the sewing machine 200 increases. Can be suppressed.

The present invention is not limited to the above embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention. For example, in the sewing machine 200 of the above-described embodiment, the lower thread DS supplied to the bobbin 22 is the special thread EDS and the upper thread US
Is selectable, but a configuration using only the upper thread US may be adopted.

The yarn holding section 220 is not limited to the structure of the above embodiment as long as it can hold the upper thread US. For example, as shown in FIG.
A shaft member 230, a holding spring 231, and a plate member 232 are provided, and have the following configuration. That is, the shaft member 230 penetrates the front end face of the arm portion 203,
The lower part of the plate member 232 is fixed to one end of the shaft member 230. The plate member 232 is curved, and the plate member 23
The lower part of 2 is in contact with the front end surface (surface) of the arm 203, and the upper part of the plate member 232 is separated from the front end of the arm 203. A washer 234 is inserted through the shaft member 230 inside the arm 203, and a retaining ring 233 is fixed to the other end of the shaft member 230. The shaft member 230 is inserted through the holding spring 231 between the washer 234 and the retaining ring 233. One end of the holding spring 231 is in contact with the retaining ring 233, the other end is in contact with the washer 234, and the washer 234 is in contact with the back surface of the front end of the arm 203.
When the holding spring 231 urges the shaft member 230, the lower portion of the plate member 232 comes into close contact with the front end surface of the arm 203. In the above-described thread holding section of another example, before the thread winding operation of the sewing machine, the operator places the upper thread US on the thread end side from above between the front end surface of the arm section 203 and the plate member 232, The upper thread is sandwiched between the lower part of the plate member 232 and the front end face of the arm 203 by the urging force of the holding spring 231. Thereby, the upper thread on the thread end side is held at the front end of the arm 203.

[0071]

According to the first aspect of the present invention, since the upper thread on the thread end side of the needle is held by the thread holding section, the upper thread is guided when the sword point guides the upper thread to the thread hooking section. Is withdrawn from the yarn supply. Therefore, the rotation of the outer hook allows the blade point to reliably guide the upper thread to the thread hooking portion, and thereafter the upper thread is securely wound around the bobbin. Further, since the yarn end side of the upper thread is held by the yarn holding section, it is not necessary to grip the thread end of the upper thread with a finger so that the thread end of the upper thread is not pulled by the shuttle device. Further, since the thread holding section is provided on the arm section, the operation of holding the upper thread on the thread holding section is easy.

According to the second aspect of the present invention, the upper thread is held by the winding spring so that the thread end of the upper thread is held. Since the shaft is inserted through the winding spring, the upper thread does not become entangled with the winding spring, and it is easy to remove the upper thread from the winding spring after the upper thread is wound on the bobbin. In addition, since only the configuration includes the winding spring and the shaft portion, it is possible to hold the thread end side of the upper thread with an inexpensive configuration, and it is possible to suppress an increase in cost of the sewing machine with the thread winding function.

[Brief description of the drawings]

FIG. 1 is a side view showing a specific mode of a sewing machine according to an embodiment.

FIG. 2 is a perspective view showing a specific mode of a lower thread winding device provided in the sewing machine.

FIG. 3 is a side view showing a specific mode of the lower thread winding device.

FIG. 4 is a perspective view showing a lower thread tension means attached to a horizontal hook of the lower thread winding device.

FIG. 5 is a plan view showing a specific mode of a yarn hooking means provided in the lower thread winding device.

FIG. 6 is a side view showing a specific mode of the yarn hooking means.

FIG. 7 is a side view showing a part of moving means provided in the lower thread winding device.

FIG. 8 is a front view showing a specific mode of the sewing machine.

FIG. 9 is a sectional view showing a ZZ section of FIG. 8;

FIG. 10 is a cross-sectional view showing a YY cross section of FIG. 8;

11 is a drawing viewed in the direction of arrow P in FIG. 10, in which the illustration of the arm portion of the sewing machine and the like is omitted.

FIG. 12 is a view for explaining the operation of the sewing machine;
2 is a view mainly showing a horizontal shuttle provided in the bobbin thread winding device.

FIG. 13 is a cross-sectional view in which a front end of an arm of a sewing machine having another example of a thread holding unit is cut away.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 bobbin thread winding device 2 needle bar 3 needle 4 horizontal hook (hook device) 7 outer hook 18 inner hook 22 bobbin 42 sword point 48 thread hooking means (thread hook section) 200 sewing machine (sewing machine with thread winding function) 201 bed section 202 vertical barrel Section 203 Arm section 204 Thread spool for upper thread (thread supply source) 220 Thread holding section 222 Shaft member (shaft section) 223 Winding spring US Upper thread

Claims (2)

[Claims] A bed portion having a substantially horizontal bed surface; a vertical trunk portion rising from the bed portion; an arm portion extending substantially parallel from the vertical trunk portion along the bed portion; A needle bar that projects downward from the tip of the part and moves up and down and has a needle, an inner pot that can store a bobbin, and an outer pot that stores the inner pot and is provided with a sword point; and A hook device arranged in the bed portion; and a yarn hooking section for hanging the upper thread so as to guide the upper thread from the thread supply source to the bobbin, wherein the bobbin is housed in the inner hook and The needle descends into the bed portion while the needle thread led out from the thread supply source is hung on the needle, and the tip of the needle catches the needle thread from the needle by the rotation of the outer hook, and With the further rotation of the shuttle, the tip of the knife guides the upper thread to the thread hook. A sewing machine with a bobbin winding function in which the upper thread is hung on the thread hooking section, and the bobbin rotates to wind the upper thread, wherein the thread holding section for holding the upper thread on the thread end side of the needle is the A sewing machine with a thread winding function, which is provided on an arm portion. 2. The sewing machine with a thread winding function according to claim 1, wherein the thread holding portion is a wound spring wound closely, and a shaft inserted through the wound spring and fixed to the arm portion. A sewing machine with a thread winding function.