JP2008012053A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly perform threading work by solving the problem that a threading hook cannot catch a thread. <P>SOLUTION: The sewing machine includes: a needle bar 2 moving vertically by driving of a sewing machine motor; a needle 3 held at the tip of the needle bar and having a needle hole formed for putting the thread therethrough; and a threading device 4 having a thread drawing mechanism 42 which draws the thread to the vicinity of the needle hole and a threading mechanism 43 which locks the thread drawn by the thread drawing mechanism by a locking member to put it through the needle hole. The thread drawing mechanism includes a thread grasping part 54 which grasps the thread at least at two places on both of the sides of the needle and which is provided at a position where the thread grasped when the thread is drawn to the vicinity of the needle hole can be locked by the threading mechanism. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sewing machine including a threading device for threading a needle hole.

2. Description of the Related Art Conventionally, there is a sewing machine provided with a threading device that allows a thread to be easily passed through a needle hole of a needle by operating a lever in order to release the operator from an annoying work of passing the thread through a needle hole of a needle. When a thread is passed through the needle hole of the needle using the threading device, the thread is guided to the thread hooking part of the needle clamp, and the thread is hooked on the thread guide member and the thread is attached to the thread gripping part. Then, by pushing down the operating lever, the threading hook operates to capture the thread hooked on the thread gripping part and pass it through the needle hole (see, for example, Patent Document 1).
JP 2004-24539 A

  However, even if the yarn hooked from the yarn hooking portion to the yarn gripping portion is loose, or even when the yarn hooked from the yarn hooking portion to the yarn holding portion is stretched, the operation lever is not operated If the operation lever is interrupted and returned to the original position, the yarn hooked from the yarn hooking portion to the yarn gripping portion may be loosened. In such a case, the threading hook may not be able to catch the thread, and the threading operation could not be performed smoothly.

  Accordingly, the present invention has been made to solve the above-described problems, and solves the problem that the threading hook cannot capture the thread, and provides a sewing machine that can perform the threading operation smoothly. Objective.

  According to the first aspect of the present invention, in the sewing machine, a needle bar that moves up and down by driving a sewing machine motor, a needle that is held at the tip of the needle bar and has a needle hole through which a thread is passed, and a thread near the needle hole And a threading device having a threading mechanism for locking the thread pulled by the thread shifting mechanism with a locking member and inserting the threaded mechanism into the needle hole, and the thread shifting mechanism includes at least A thread gripping portion provided at a position where the thread gripped when the thread is pulled near the needle hole and held at two positions on both sides of the needle can be locked by the threading mechanism. It is characterized by providing.

According to the first aspect of the present invention, when the yarn gripping mechanism is provided with the yarn gripping portion, the yarn is gripped in a state where the yarn is stretched at least at two positions on both sides of the needle, and the yarn is pulled near the needle hole. The thread held by the thread can be locked by the threading mechanism.
Thereby, the problem that the threading hook cannot catch the thread can be solved, and the threading operation can be performed smoothly.

  According to a second aspect of the present invention, in the sewing machine according to the first aspect, the yarn shifting mechanism has a main body that is movable between a vicinity of the needle hole and a position retracted from the vicinity of the needle hole, The thread gripper is movable between a position where at least two parts abut against the main body part and a position where the part is separated from the main body part. An urging portion that urges the grip portion toward the main body portion so that the grip portion abuts on the main body portion, and after passing the thread through the needle hole by the threading mechanism, Is provided with a release part that separates the grip part from the main body part against the urging force of the urging part when retracting from the vicinity of the needle hole.

According to the second aspect of the present invention, when the yarn is gripped by the yarn gripping portion, the gripping portion is biased toward the main body by the biasing force of the biasing portion, and the gripping portion abuts on the main body. The thread is gripped. By moving the main body to the vicinity of the needle hole while the thread is gripped by the thread gripping part, the threading mechanism can thread the needle hole. In this state, after passing the thread through the needle hole by the threading mechanism, when the thread shifting mechanism retreats from the vicinity of the needle hole, the release part separates the grip part from the main body part against the biasing force of the biasing part. . Thereby, after the threading is finished, the yarn is quickly released from the yarn gripping portion.
Accordingly, it is not necessary for the operator to directly carry the thread through and release the thread after the thread gripping part grips the thread, and therefore the work can be simplified.

According to the first aspect of the present invention, the yarn gripping mechanism is provided with the yarn gripping portion so that the yarn is gripped in a state where the yarn is stretched at at least two places, and is gripped when the yarn is pulled near the needle hole. The thread can be locked by the threading mechanism.
Thereby, the problem that the threading hook cannot catch the thread can be solved, and the threading operation can be performed smoothly.

According to the second aspect of the present invention, when the yarn is gripped by the yarn gripping portion, the gripping portion is biased toward the main body by the biasing force of the biasing portion, and the gripping portion abuts on the main body. The thread is gripped. By moving the main body to the vicinity of the needle hole while the thread is gripped by the thread gripping part, the threading mechanism can thread the needle hole. In this state, after passing the thread through the needle hole by the threading mechanism, when the thread shifting mechanism retreats from the vicinity of the needle hole, the release part separates the grip part from the main body part against the biasing force of the biasing part. . Thereby, after the threading is finished, the yarn is quickly released from the yarn gripping portion.
Accordingly, it is not necessary for the operator to directly carry the thread through and release the thread after the thread gripping part grips the thread, and therefore the work can be simplified.

Hereinafter, the best mode of a sewing machine according to the present invention will be described in detail with reference to the drawings.
<Configuration of sewing machine>
As shown in FIG. 1, the sewing machine 100 has a body portion 102 erected on the upper surface of the base 101 on a base 101 serving as a base, and is integrally formed with the body portion 102 and extends along the upper surface of the base 101. The arm part 103 formed as described above is provided. At the upper part of the arm portion 103, a bobbin 1 is provided as a yarn supply source that rotates by driving a built-in sewing machine motor (not shown) and feeds the upper yarn T. Near the tip of the arm portion 103, there is provided a needle bar 2 connected to an upper shaft (not shown) that is rotated by driving a sewing machine motor via a crank rod or the like. The needle bar 2 moves up and down by converting the rotational motion of the upper shaft into the vertical motion by the crank rod. At the tip (lower end) of the needle bar 2, a needle 3 having a needle hole through which the upper thread T from the bobbin 1 is passed is held. A groove 103a is formed in the vicinity of the tip of the arm portion 103 along the vertical direction of the sewing machine 100, and the tip of the balance 104 for adjusting the tension applied to the upper thread T is provided so as to protrude from the groove 103a. ing. The balance 104 is connected to the upper shaft and operates in synchronization with the needle bar 2 with the upper thread T passed through the tip. A threading device 4 for passing the upper thread T through the needle 3 is provided adjacent to the needle bar 2 near the tip of the arm portion 103.

(Threading device)
As shown in FIGS. 2 to 4, the threading device 4 is a device that passes the upper thread T through the needle hole of the needle 3.
The threading device 4 includes a holder 41 provided with each mechanism. The holder 41 is formed with an operation lever 41a for pushing down the holder 41 itself.
The holder 41 includes a thread shifting mechanism 42 that pulls the thread toward the vicinity of the needle hole of the needle 3, and a threading mechanism 43 that locks the thread pulled by the thread shifting mechanism 42 and inserts the thread through the needle hole. ing.

(Thread gathering mechanism)
The yarn gathering mechanism 42 is provided with a yarn gathering shaft 51 so that its axis extends in the vertical movement direction of the holder 41. The yarn gathering shaft 51 is formed in a columnar shape, and is inserted through the holder 41 so as to be rotatable about the axis in the vicinity of the middle of the yarn gathering shaft 51. A gear 52 for rotating the yarn gathering shaft 51 by its own rotation is inserted into the yarn gathering shaft 51 and fixed to the yarn gathering shaft 51. At the lower end of the yarn gathering shaft 51, a yarn gathering main body portion 53 is fixed as a main body portion that rotates around the predetermined position along with the rotation of the yarn gathering shaft 51 and brings the upper thread T near the needle hole of the needle. That is, the yarn gathering main body 53 is movable between the vicinity of the needle hole and the position retracted from the vicinity of the needle hole by the rotation of the yarn gathering shaft 51.

The yarn gathering main body portion 53 is formed in a plate shape, and is formed at one end of the plate portion 53 a and a plate portion 53 a extending in a substantially horizontal direction substantially orthogonal to the axial direction of the yarn gathering shaft 51. Is inserted and is fixed to the thread guide shaft 51, and the two wall portions 53c, which are formed in the vicinity of the other end of the plate portion 53a and are erected with respect to the surface of the plate portion 53a, 53d is integrally formed.
The lower ends of the wall portions 53c and 53d are formed so as to protrude in the standing direction of the wall portions 53c and 53d, and the contact portions 53f and 53g whose lower ends are formed in a planar shape are integrally formed with the wall portions 53c and 53d. Has been. The abutting portions 53f and 53g grip the upper thread T with the thread gripping portion 54, which will be described later, at the flat portion at the lower end. The wall portion 53c and the wall portion 53d are formed at an appropriate distance in the longitudinal direction of the plate portion 53a, and the upper thread T is gripped by the contact portions 53f and 53g, so The upper thread T can be gripped in two places. The abutting portions 53f and 53g are formed such that their tip portions are inclined upward.

The yarn gathering main body portion 53 is provided with a yarn gripping portion 54 that grips the yarn gathering main body portion 53 in a state where the upper yarn T is stretched at least at two places. The thread gripping portion 54 is provided at a position where the upper thread T gripped when the upper thread T is pulled to the vicinity of the needle hole can be locked by the threading mechanism 43.
The thread gripping portion 54 is formed in a substantially L shape in a side view, and a bent portion when viewed from the side surface is rotatably attached in the vicinity of the lower ends of the wall portions 53c and 53d of the yarn gathering main body portion 53. The thread gripping portion 54 is spanned between the wall portions 53c and 53d of the yarn gathering main body portion 53, and a shaft portion 55 serving as a rotation shaft when the thread gripping portion 54 rotates, and the axis of the shaft portion 55 The locking portion 56 that is provided in parallel and operates so as to follow an arcuate locus centering on the shaft portion 55 in a state in which a claw portion 72 described later is locked, and the shaft portion 55 and the locking portion 56 are connected. The connecting portion 57 is formed so as to extend substantially orthogonal to the shaft portion 55 and the connecting portion 57, and between the position where the contact portion 53f, 53g of the yarn gathering main body portion 53 abuts and the position where it separates. And gripping portions 58f and 58g for gripping the upper thread T by contact with the contact portions 53f and 53g.

The shaft portion 55 is provided with an urging member such as a spring along the axial direction thereof, and when the shaft portion 55 is attached to the yarn gathering main body portion 53, the gripping portions 58f and 58g are applied by the urging force. It contacts the contact portions 53f and 53g. Therefore, this biasing member functions as the biasing portion 59.
The gripping portions 58f and 58g are formed in a substantially flat surface so that the upper surface can be in close contact with the contact portions 53f and 53g, and the tip end portions thereof are inclined downward. As a result, when the contact portions 53f and 53g and the gripping portions 58f and 58g are in contact with each other by the urging force of the urging portion 59, the tips extend in a direction away from each other. The upper thread T can be easily inserted between the gripping portions 58f and 58g.

  When the yarn gripping portion 54 is attached to the yarn gathering main body portion 53, the latching portion 56 and the connecting portion 57 are along the surface of the plate portion 53a of the yarn gathering main body portion 53 by the urging force of the urging portion 59. That is, the extending direction of the connecting portion 57 is arranged along the vertical direction of the needle 3, and in this state, the contact portions 53f and 53g and the grip portions 58f and 58g are in contact.

(Threading mechanism)
The threading mechanism 43 is provided with a threading shaft 61 so that its axis extends in the vertical movement direction of the holder 41, that is, in parallel to the thread shifting shaft 51. The threading shaft 61 is formed in a columnar shape, and a protrusion 61a is formed in the vicinity of the upper end of the threading shaft 61. The protrusion 61a is fitted in a cam groove 41b formed in the vicinity of the upper end of the holder 41 as shown in FIG. That is, the cam groove 41 b and the protrusion 61 a convert the vertical movement of the holder 41 into the rotational movement of the threading shaft 61. A gear 62 that rotates with its own rotation is inserted through the threading shaft 61 and is fixed to the threading shaft 61. The gear 62 is provided so as to mesh with a gear 52 provided on the yarn gathering shaft 51, and the rotation of the threading shaft 61 is transmitted to the yarn gathering shaft 51 via the gears 62, 52, so Rotates.

The upper end of the threading shaft 61 is rotatably inserted into the holder 41, and a spring 63 is provided coaxially with the threading shaft 61 between the upper end and the protrusion 61a.
In addition, the needle bar 2 is provided with a stopper 64 that abuts the protrusion 61 so that the threading shaft 61 does not descend more than a predetermined distance.
A threading arm 65 is fixed to the lower end of the threading shaft 61. The threading arm 65 rotates around the one end as the threading shaft 61 rotates. The threading arm 65 is movable between the vicinity of the needle hole and the position retracted from the vicinity of the needle hole by the rotation of the threading shaft 61.

The threading arm 65 approaches the vicinity of the needle hole when the threading shaft 61 rotates and the rotation is transmitted to the thread gathering shaft 51 and the thread gripping portion 54 of the thread gathering main body 53 approaches the vicinity of the needle hole. When the thread gripping part 54 is separated from the vicinity of the needle hole, it is attached so as to be separated from the vicinity of the needle hole. In other words, the approach and separation of the thread gripping part 54 and the threading arm 65 of the thread gathering body part 53 in the vicinity of the needle hole are synchronized.
The tip of the threading arm 65 is formed to branch into two branches, and a threading hook 66 is provided between the two branches as a locking member that locks the upper thread T and passes it through the needle hole. When the threading arm 65 approaches the vicinity of the needle hole, the threading hook 66 locks the upper thread T gripped by the thread gripping portion 54 while passing through the needle hole and passing through the needle hole. Then, the threading arm 65 moves away from the vicinity of the needle hole to escape from the needle hole, and the upper thread T is passed through the needle hole by this operation.

  In the vicinity of the lower end of the threading shaft 61 and immediately above the threading arm 65, the threading hook 66 passes the thread through the needle hole by the rotational operation of the threading arm 65, and then the thread gripping portion 54 is near the needle hole. A release portion 70 is provided that separates the gripping portions 58f and 58g of the yarn gripping portion 54 from the contact portions 53f and 53g of the yarn gathering main body portion 53 against the biasing force of the biasing portion 59 when retracting from the position. Yes. The release portion 70 is fixed to the threading shaft 61 at one end, and is formed to protrude below the other end of the arm portion 71 and the arm portion 71 rotating with the rotation of the threading shaft 61, and the thread-feeding body portion 53. And a claw portion 72 that is locked to the locking portion 56 of the thread gripping portion 54 when the thread gripping portion 54 approaches the vicinity of the needle hole.

  The claw portion 72 is always urged downward by a spring (not shown) and is formed from a material having a slight elasticity such as a resin, and when the yarn gathering main body portion 53 and the yarn gripping portion 54 approach each other near the needle hole. The upper part of the engaging part 56 is overtaken by the engaging part 56. The claw portion 72 moves while being locked to the locking portion 56 when the yarn gathering main body portion 53 and the yarn gripping portion 54 are separated from the vicinity of the needle hole. The yarn gripping portion 54 is rotated about the shaft portion 55 as a fulcrum against the urging force of the urging portion 59. Further, when the thread holding main body 53 and the thread gripping part 54 are separated from the vicinity of the needle hole, the locking part 56 moves downward by the rotation of the thread gripping part 54, so that the claw part 72 is engaged with the locking part 56. It is released from the stopped state.

<Threading procedure with threading device>
Next, a procedure for threading the needle 3 into the needle hole by the threading device 4 will be described.
First, as shown in FIG. 2, the operator removes the upper thread T wound around the bobbin 1 in a state in which the main body 53, the threading arm 65, and the release portion 70 are sufficiently separated from the vicinity of the needle hole. The upper thread T thus pulled out is passed through predetermined parts such as the balance 104, and the vicinity of the tip of the upper thread T is contacted with the contact portions 53f and 53g of the yarn gathering main body 53 and the gripping portions 58f and 58g of the thread gripping portion 54. To hold the upper thread T. Here, since the gripping portions 58f and 58g are urged to abut against the abutting portions 53f and 53g by the urging force of the urging portion 59, the state where the upper thread T is gripped can be maintained.

  The holder 41 is always urged upward by the spring 73. After the upper thread T is gripped by the thread gripping portion 54, when the operation lever 41a of the holder 41 is pushed down, the spring 63 is contracted and its restoring force is increased. The holder 41 moves down and stops once by the stopper 64. When the holder 41 is further lowered, the protrusion 61a fitted in the cam groove 41b formed in the holder 41 operates along the cam groove 41b, so that the threading shaft 61 rotates around the axis. By the rotation of the threading shaft 61, the threading arm 65 and the release portion 70 provided in the vicinity of the lower end of the threading shaft 61 rotate and move so as to approach the needle hole.

The gear 62 is also rotated by the rotation of the threading shaft 61, and the gear 52 that meshes with the gear 62 is rotated in the reverse direction with respect to the gear 62 by the rotation of the gear 62. As the gear 52 rotates, the yarn gathering shaft 51 also rotates, and the yarn gathering main body 53 rotates and moves so as to approach the needle hole.
When the operating lever 41a is pushed down to the limit, that is, when the projection 61a moves to a predetermined position of the cam groove 41b, the upper thread T gripped by the thread gripping portion 54 is brought near the needle hole as shown in FIGS. The threading hook 66 disposed and provided at the tip of the threading arm 65 passes through the needle hole and locks the upper thread T. At the same time, the claw portion 72 of the release portion 70 gets over the locking portion 56 of the thread gripping portion 54 and is locked to the locking portion 56.

Next, when the depressed operation lever 41 a is released, the holder 41 moves upward by the restoring force of the springs 63 and 73. As the holder 41 is raised, the protrusion 61a moves in the direction opposite to that when the cam groove 41b is pushed down. As a result, the threading shaft 61 rotates in the direction opposite to that when the holder 41 is pressed down, and the threading arm 65 and the release portion 70 provided on the threading shaft 61 rotate and move away from the needle hole. .
The gear 62 is also rotated by the rotation of the threading shaft 61, and the gear 52 that meshes with the gear 62 is rotated in the reverse direction with respect to the gear 62 by the rotation of the gear 62. As the gear 52 rotates, the yarn gathering shaft 51 also rotates, and the yarn gathering main body 53 rotates and moves away from the needle hole.

At this time, as shown in FIG. 6, the threading hook 66 escapes from the needle hole while the upper thread T is locked, so that the upper thread T passes through the needle hole, and the upper thread T passes through the needle 3. Is passed through the needle hole. Further, since the claw portion 72 is locked to the locking portion 56 of the thread gripping portion 54, when the thread gripping portion 54 and the release portion 70 are separated from each other, the locking portion 56 is pulled by the claw portion 72. The force is applied. When the locking portion 56 is pulled by the claw portion 72, the thread gripping portion 54 rotates against the urging force of the urging portion 59, and the gripping portions 58f and 58g thereby cause the thread gathering main body portion 53 to rotate. It moves away from the contact parts 53f and 53g. When the gripping portions 58f and 58g are separated from the contact portions 53f and 53g, the upper thread T held by the contact portions 53f and 53g and the gripping portions 58f and 58g is released, and the threading hook 66 is released. Pulled on.
With the above operation, the upper thread T is passed through the needle hole of the needle 3 and at the same time, the upper thread T can be removed from the thread gripping portion 54.

<Effect>
According to the sewing machine 100 provided with the threading device 4 as described above, the upper thread T is gripped in a state where the upper thread T is stretched at at least two locations by providing the thread gripping mechanism 54 in the thread shifting mechanism 42. The upper thread T gripped when the thread T is pulled near the needle hole can be locked by the threading mechanism 43.
Thereby, the problem that the threading hook 66 cannot catch the upper thread T is solved, and the threading operation can be performed smoothly.
When the upper thread T is gripped by the thread gripping portion 54, the gripping portions 58f and 58g are biased toward the contact portions 53f and 53g by the biasing force of the biasing portion 59, and the gripping portions 58f and 58g are The upper thread T is gripped by coming into contact with 53f and 53g. By moving the yarn gathering main body 53 to the vicinity of the needle hole while the upper thread T is gripped by the thread gripping portion 54, the threading mechanism 43 can thread the needle hole. After the upper thread T is passed through the needle hole by the threading mechanism 43 in this state, the claw portion 72 provided in the release portion 70 is provided on the urging portion 59 when the thread gathering main body portion 53 is retracted from the vicinity of the needle hole. The gripping portions 58f, 58g are separated from the contact portions 53f, 53g against the urging force. Thereby, after threading is finished, the upper thread T is released from the thread gripping portion 54 immediately.
Therefore, after the upper thread T is gripped by the thread gripping portion 54, it is not necessary for the operator to perform threading and release the upper thread T directly with the upper thread T, so that the work can be simplified. .

The present invention is not limited to the above embodiment. For example, as shown in FIG. 7, a threading device 8 in which the thread gripping portion 84 is formed in a substantially I-shaped plate shape in a side view may be used.
Specifically, the thread gripping portion 84 is rotatably attached near the lower ends of the wall portions 83c and 83d of the yarn gathering main body portion 83 near the center thereof. The yarn gripping portion 84 is spanned between the wall portions 83c and 83d of the yarn gathering main body portion 83, and the shaft portion 85 that serves as a rotation shaft when the yarn gripping portion 84 rotates, and the axis of the shaft portion 85 And a locking portion 86 that operates so as to follow an arcuate locus centered on the shaft portion 85 with the claw portion 72 locked, and a connection that connects the shaft portion 85 and the locking portion 86. It is formed so as to extend continuously with respect to the extending direction of the connecting portion 87 and the connecting portion 87, and is movable between a position where the contacting portion 83f, 83g of the yarn gathering main body 83 abuts and a position where it is separated. And gripping portions 88f and 88g for gripping the upper thread T by contact with the contact portions 83f and 83g.

The shaft portion 85 is provided with an urging member such as a spring along its axial direction. When the shaft portion 85 is attached to the yarn gathering main body 83, the gripping portions 88f and 88g are applied by the urging force. It abuts on the contact portions 83f and 83g. Therefore, this biasing member functions as the biasing portion 89.
The gripping portions 88f and 88g are formed in a substantially flat surface so that one surface thereof can be brought into close contact with the surface of the contact portions 83f and 83g formed so as to be along the vertical direction of the needle 3, and the tip portion thereof is on the surface side. It is formed so as to be inclined. As a result, when the contact portions 83f and 83g and the gripping portions 88f and 88g contact each other, the tips extend in directions away from each other, so that the contact portions 83f and 83g and the gripping portions 88f and 88g It becomes easy to insert the upper thread T between them.

When the yarn gripping portion 84 is attached to the yarn gathering main body portion 83, the locking portion 86, the connecting portion 87, and the gripping portions 88f, 88g are in a state along the surface of the plate portion 83a of the yarn gathering main body portion 83, that is, The extending direction of the connecting portion 87 and the direction along the contact surface of the gripping portions 88f, 88g with the contact portions 83f, 83g are arranged along the vertical direction of the needle 3, and in this state, the contact portions 83f, 83g And the gripping portions 88f and 88g are in contact with each other.
Further, the gripping portions 88f and 88g of the yarn gripping portion 84 are located on the back side of the contact portions 83f and 83g of the yarn gathering main body portion 83, that is, between the contact portions 83f and 83g and the plate portion 83a. Has been placed.
Thereby, after the upper thread T is passed through the needle hole, when the claw portion 72 pulls the locking portion 86, the locking portion 86 rotates to the front side in FIG. 7, whereas the gripping portions 88f, 88g It rotates to the back side (side approaching the plate part 83a) in FIG. 7, and leaves | separates from contact part 83f, 83g.
The yarn gripping portion 84 as described above can achieve the same effects as the yarn gripping portion 54 of the above embodiment.
In addition, the present invention can be freely changed and improved within the scope of the invention.

The schematic front view of a sewing machine. The perspective view of a threading device. The perspective view from the upper side which expanded and looked at the threading mechanism and the threading mechanism when threading the needle hole of the needle. The perspective view from the lower side which expanded and looked at the threading mechanism and the threading mechanism when threading the needle hole of the needle. The perspective view which shows the relationship between the cam groove and protrusion in a threading mechanism. When the upper thread is passed through the needle hole of the needle, the thread gripping part is rotated by the claw, and the gripping part of the thread gripping part is released from the contact part of the thread gathering main body part to release the upper thread. The perspective view from the lower part which expanded and looked at the thread gathering mechanism and the threading mechanism. The perspective view which shows other embodiment of the threading apparatus which changed the holding | grip form of the upper thread | yarn by the thread holding part.

Explanation of symbols

2 Needle bar 3 Needle 4 Threading device 42 Threading mechanism 43 Threading mechanism 53 Threading main body (main body)
54 thread gripping part 58f gripping part 58g gripping part 59 biasing part 66 threading hook (locking member)
70 Release part 100 Sewing machine T Upper thread (thread)

Claims (2)

A needle bar that moves up and down by the drive of the sewing machine motor;
A needle held at the tip of the needle bar and formed with a needle hole for threading;
A threading device having a thread shifting mechanism that pulls the thread near the needle hole and a threading mechanism that locks the thread pulled by the thread shifting mechanism with a locking member and inserts the thread into the needle hole;
The thread pulling mechanism is gripped in a state where the thread is stretched at least at two positions on both sides of the needle, and the thread gripped when the thread is pulled close to the needle hole is positioned so that the thread can be locked by the threading mechanism. A sewing machine comprising a provided thread gripper. The yarn shifting mechanism has a main body that is movable between the vicinity of the needle hole and a position retracted from the vicinity of the needle hole,
The thread gripping part is movable between a position where at least two parts abut against the main body part and a position where the part is separated from the main body part, and a gripping part for gripping the thread by contact with the main body part; An urging portion that urges the grip portion toward the main body portion so that the grip portion abuts on the main body portion;
A release part that separates the grip part from the main body part against the urging force of the urging part when the threading mechanism retracts from the vicinity of the needle hole after passing the thread through the needle hole by the threading mechanism. The sewing machine according to claim 1, comprising:

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