JP2003284885A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine making it possible to surely pass a thread through the eye of a needle. <P>SOLUTION: A threading hook 35 is supported by a threading hook holding member 162, while the fore end part of a thread holding arm 62 on the left butts against the lower part of the threading hook holding member 162. Therefore the speed of rising of a thread holding member 50 by a moving mechanism is suppressed and the thread holding member 50 is prevented from moving one-sidedly above the eye of the needle 36. In other words, the load of the contact of the thread holding member 50 with the threading hook holding member 162 is imposed on a tension spring pulling back a second string-like member, so as to suppress (reduce) the speed of rising of the thread holding member 50. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine in which a retained thread is passed through a needle eye through a threading hook.

[0002]

2. Description of the Related Art Conventionally, a threading device of a sewing machine has a threading hook capable of passing through an eye hole of a needle, a threading rod for supporting the threading hook at its lower end, and a stopped needle at a predetermined height. A rotating member for rotating the threading hook and an operating member for manually raising and lowering and rotating the threading rod are provided only when the threading hook is in the above condition.

Further, the threading device includes a tensioning member for holding at least two positions of the thread and a moving mechanism for moving the tensioning member, which tensions the thread, in front of the eye hole of the needle. In addition to a hook and a threading rod, there is one in which the tensioned thread is pulled into the eye hole of the needle by the threading hook and the thread is passed through the eye hole of the needle. For example, Japanese Patent Publication No. 7-7159 by the applicant.
This is a threading device for a sewing machine described in Japanese Patent No.

[0004]

However, in the conventional sewing machine, when the operator operates the operating member quickly, the relative speed between the threading hook and the thread is also increased. Therefore, depending on the situation of the thread and the material of the thread, If the relative speed between the threading hook and the thread is slightly higher than the planned speed, there is a problem that the threading hook cannot catch the thread and threading cannot be performed.

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a sewing machine capable of reliably threading a thread through the eye hole of a needle.

[0006]

In order to achieve this object, a sewing machine according to claim 1 has a threading hook which is capable of entering and retracting into the eye hole of a needle, and the threading hook which is provided in the eye hole of the needle. The threading hook projecting to the opposite side of the eye hole of the needle, and then moving the threading hook back and forth, and a thread holding member for holding the thread on the opposite side of the eye hole of the needle. A moving mechanism that moves the yarn holding member so as to approach and separate, an operating member that is operated to manually operate the advancing / retreating mechanism and the moving mechanism, and the needle eye by the advancing / retreating mechanism. In the vicinity of the threading hook protruding from the opposite side of the hole, a speed suppressing mechanism that suppresses the moving speed of the thread holding member by the moving mechanism is provided.

In the sewing machine according to the first aspect, the advancing / retreating mechanism causes the threading hook to enter the eye hole of the needle, and the threading hook protrudes to the opposite side of the eye hole of the needle,
The threading hook is retracted. The moving mechanism moves the thread holding member such that the thread holding member holding the thread approaches the side opposite to the eye hole of the needle and then separates the thread holding member. The operating member is operated to manually operate the advancing / retreating mechanism and the moving mechanism. The speed suppression mechanism,
The moving speed of the thread holding member by the moving mechanism is suppressed in the vicinity of the threading hook protruding from the side opposite to the eye hole of the needle by the advancing and retracting mechanism.

A sewing machine according to a second aspect of the present invention suppresses a yarn holding member having a plurality of yarn holding portions separated from each other so as to extend and hold the yarn in a predetermined direction, and a moving speed of the plurality of yarn holding portions. And a speed suppressing mechanism that
It has a plurality of thread holding parts which are separated so as to extend and hold the thread in a predetermined direction, and the speed suppressing mechanism suppresses the moving speed of the plurality of thread holding parts.

A sewing machine according to a third aspect of the present invention includes a speed suppressing mechanism for suppressing a moving speed of the thread holding member until the threading hook retracts from the eye hole of the needle, and the speed suppressing mechanism includes the thread suppressing mechanism. The moving speed of the thread holding member is suppressed until the through hook retracts from the eye hole of the needle.

A sewing machine according to a fourth aspect of the present invention includes a thread holding member having a plurality of thread holding portions separated so as to extend and hold the thread in a predetermined direction, and a side opposite to the eye hole of the needle by the advancing and retracting mechanism. From the passage of the threading hook projecting from the plurality of thread holding portions with the plurality of thread holding portions sandwiched therebetween, until the thread passing hook retracts from the eye hole of the needle, at least one of the thread holding portions And a speed suppressing mechanism for suppressing the moving speed.

In the sewing machine according to the present invention, the thread holding member has a plurality of thread holding portions which are separated from each other so as to extend and hold the thread in a predetermined direction. The speed suppressing mechanism allows the threading hook to pass through the threading hook projecting from the opposite side of the eye hole of the needle by the advancing / retreating mechanism while the plurality of thread holding portions are sandwiched between the threading hooks. The moving speed of at least one of the yarn holding portions is suppressed until the yarn holding portion retracts from the eye hole.

A sewing machine according to a fifth aspect of the present invention includes a speed suppressing mechanism that releases the restriction of the moving speed of the thread holding member when the threading hook retracts from the eye hole of the needle. When the threading hook retracts from the eye hole of the needle, the restriction of the moving speed of the thread holding member is released.

According to a sixth aspect of the present invention, a sewing machine holds a threading hook holding member for holding the threading hook, and restrains movement of the thread holding member until the threading hook retracts from the eye hole of the needle. In this way, the thread restraining hook holding member and the speed holding mechanism for bringing the thread holding member into contact with each other are provided. The threading hook holding member holds the threading hook. The speed suppressing mechanism brings the threading hook holding member and the thread holding member into contact with each other so as to suppress the movement of the thread holding member until the threading hook retracts from the eye hole of the needle. .

A sewing machine according to a seventh aspect of the present invention comprises a needle and a threading hook which are swung relative to the sewing machine frame, and a moving mechanism which is supported by the sewing machine frame and moves the thread holding member along a fixed path. The needle and the threading hook are swung relative to the sewing machine frame and the moving mechanism.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the sewing machine 10
Is a bed portion 12 having a horizontal plane, a pedestal portion 14 standing from the right end portion of the bed portion 12, an arm portion 16 extending leftward from the pedestal portion 14, and a head serving as a left end portion of the arm portion 16. And part 18. This head part 18
Include a needle bar drive mechanism 28 for vertically moving the needle bar 26 relative to the sewing machine frame 24 constituting the head portion 18 and the like, and a needle bar 26 relative to the sewing machine frame 24.
Needle bar swinging mechanism 30 for horizontally swinging the needle, needle bar 2
6, a balance driving mechanism 34 for moving the balance 32 up and down in a predetermined phase, and a threading mechanism 38 for passing the thread T through a needle 36 at the lower end of the needle bar 26 with a threading hook 35. . The needle 36 cooperates with the shuttle mechanism 40 in the bed, and the needle 36 and the balance 32 move up and down in a predetermined phase to form a seam.

This sewing machine 10 is provided in Japanese Patent Application No. 2001-172.
No. 264 (hereinafter referred to as "the above-mentioned applicant's application")
A thread cassette 44 for accommodating the thread spool 42 can be attached to and detached from the cassette mounting portion 46 in the same manner as the sewing machine described in
By the operation of mounting the thread cassette 44, the threading rod 4
7 is pushed down and the thread T is also applied to the balance 32 at the same time. Further, the sewing machine 10 is provided with a transmission member 48 for transmitting / blocking the force of pushing down the threading rod 47, and is basically similar to the sewing machine described in the above-mentioned applicant's application, focusing on different points. This will be described below.

Unlike the sewing machine filed by the present applicant, in this sewing machine 10, on the right side of the balance 32, as shown in FIG.
The thread holding member 50 is once lowered to the eye hole 51 of the needle 36, brought close to the eye hole 51 of the needle 36, and then raised.
A moving mechanism 52 that separates the eye 36 from the eye hole 51 of the needle 36 is provided. The moving mechanism 52 is fixed to the sewing machine frame 24 via a support block 54 and a mounting member 56 shown in FIGS. 4 and 5.

On the left side of the cassette mounting portion 46, the threading hook mechanism 55 related to the threading hook 35 of the threading mechanism 38 swings in an arc along with the needle bar 26 with the swing center axis 58 as the swing axis. It is located in. On the other hand, since the thread holding member 50 is fixed to the sewing machine frame 24 so as not to swing together with the needle bar 26, it is not necessary to increase the output of a pulse motor or the like that swings the needle bar 26 or the threading rod 47. Further, it is not necessary to provide a relief space for swinging the moving mechanism 52 inside the sewing machine 10, and the sewing machine 10 is downsized.

Next, the thread holding member 50 and the moving mechanism 52 will be described.

As shown in FIG. 6B, the thread holding member 50
Has two parallel thread holding arms 62 and 64, and these thread holding arms 62 and 64 extend from the connecting portion 66 in parallel with a space therebetween, and the thread holding arms 62 and 64 on the left side in FIG. An intermediate portion of a swinging member 68 is swingably supported on the left side surface of the holding arm 62. The swing shaft 70 of the swing member 68 is passed through a winding spring 72, and the winding spring 72 abuts on a fixed spring contact pin 74 at the upper end of the swing member 68 in FIG. The upper end of the swing member 68 in (a) is urged in the counterclockwise direction about the swing shaft 70, and the lower end of the swing member 68 in FIG. 6 (b) is the left yarn holding arm 62.
Located near the tip of the.

A contact pin 76 is fixed to the swing member 68 below the swing shaft 70 in FIG. 6 (b) so as to project leftward in FIG. 6 (b). 6 is pushed to the left in FIG. 6A against the elastic force of the winding spring 72, the lower end of the swinging member 68 is separated from the tip of the left thread holding arm 62 in FIG. 6B. To do. That is, the thread holding member 50 is configured to be openable and closable so that the thread T is sandwiched.

The connecting portion 66 extends rightward in FIG. 6B, and the first interlocking member 78 of the moving mechanism 52 is fixed to the connecting portion 66. The first interlocking member 78 protrudes to the right in FIG. 6B, and as shown in FIG. 6C, the protrusion 80 has a moving support plate 82 to the right in FIG. 6B. It is slidably attached to a guide groove 84 formed so as to penetrate therethrough. The width of the guide groove 84 extends in the longitudinal direction of the right moving support plate 82 in FIG. 6B, and the width thereof is substantially the same as the protruding portion 80 of the first interlocking member 78. In FIG. 6B, the right moving support plate 82 and the left moving support plate 86 have six spacing pins 88, 90, 92,
94, 96 and 98 are attached in parallel at regular intervals.

The upper two spacing pins 88 in FIG.
Pulleys 100 and 102 are rotatably supported on 90, respectively, and a pulley 104 is rotatably supported also on one lower spacing pin 98 in FIG. These pulleys 10
An intermediate portion of the first string-shaped member 106, which is a thin metal wire, is hung on 0, 102, and 104, as shown in FIG.
As shown in FIG. 5, the first string-like member 106 is folded back at the contact portion with the pulleys 100 and 104, as if the letter “N” was reversed horizontally. This first string-like member 106
Are the pulleys 100, 102, 104 and the moving support plate 8
It is movable relative to 2. That is, the pulleys 100 and 104 movably support the first string-shaped member 106. In the middle part of the first string-like member 106,
When the first interlocking member 78 is fixed and the first string-shaped member 106 moves, the first interlocking member 78 also integrally moves relative to the moving support plate 82. Both ends of the first string-shaped member 106 cannot be separated from the fixed support pins 110 and 112 protruding from the immovable support plate 108, but are attached slidably on the outer circumference of the fixed support pins 110 and 112. There is.

Thus, when the first string-like member 106 moves downward in FIG. 7, one side of the first string-like member 106 of the predetermined length cannot move. The fixed support pin 110 of the immovable support member 108
The other side is movably supported by a pulley 100 of a movable support member. The first support mechanism is composed of a fixed support pin 110 of the immovable support member 108 and a pulley 100 of the movable support plate 82, 86. The pulley 104 abuts as a first moving member on the first string-like member 106 while being supported by the first supporting mechanism, and moves the first string-like member 106. The first interlocking member 78 is the pulley 10 serving as the first moving member.
The thread holding member 50 as a threading mechanism is connected to the first string-like member 106 on the left side (the other side) of FIG. Further, when the first string-shaped member 106 moves upward in FIG. 7, the pulley 104 on the upper side in FIG. 7 acts as a movement support member for the first string-shaped member 106. In addition, the first string-shaped member 106 is shown in FIG.
7, the lower pulley 104 in FIG. 7 acts as a movement supporting member for the first string-like member 106.

Therefore, when the two moving support plates 82 and 86 move downward in FIG. 7 by the distance d, the pulleys 100 and 104 also move downward in FIG. 7 by the distance d.
Along with these movements, the intermediate portion of the first string-shaped member 106 is pushed downward by the pulley 104 in FIG.
The first string-shaped member 106 is fed by the length d from the right side (movable support side) of the pulley 100 to the left side (non-movable support side) by the rotation of the pulley 104. That is, this pulley 10
When 4 moves downward in FIG. 7, it functions as a moving pulley. Than the pulley 100 on the right side of this pulley 104,
Further, the first interlocking member 78 and the thread holding member 50 fixed to the first string-like member 106 on the right side move downward by a distance 2 × d. Thus, the moving mechanism 52 is configured so that the moving amount of the pulley 104 is doubled. In addition, as described above, which one of the pulleys 100 and 104 serves as the moving member depends on the moving direction of the first string-like member 106.

A second cord-shaped member 114, which is different from the first cord-shaped member 106, is attached to the immovable support plate 108, and one side of the left second cord-shaped member 114 in FIG. 7 is attached. The end portion of the fixed support pin 1 cannot be separated from the fixed support pin 116 protruding from the immovable support plate 108.
The outer circumference of 16 is attached slidably. Further, the end portion of the right second cord-shaped member 114 in FIG. 7 cannot be separated from the spacing pin 90 protruding from the moving support plates 82 and 86, but can slide on the outer periphery of the spacing pin 90. Is attached to.

In the middle portion of the second string-shaped member 114,
The pulley 118 is in contact, and the second string-shaped member 114 is folded back at a contact portion with the pulley 118 like a letter “V”. This pulley 118 is used for the cassette contact body 12.
The cassette contact body 120 is slidably attached to a guide groove (not shown) formed through the other immovable support plate 122 shown in FIG. ing. The cassette contact body 120 is the yarn cassette 4
4 so that it can be pushed down to the right part of 4
4 is arranged in the ascending / descending path and is configured to separate from the yarn cassette 44 when pushed down to a predetermined position.

Four spacing pins 122, 124, 126, 128 are provided between the two stationary support plates 108, 122.
Are fixed upright so as to be orthogonal to both the immovable support plates 108 and 122, and the two immovable support plates 108 and 122 are positioned in parallel with a space. In the meantime, the two movable support plates 82 and 86, the first string-shaped member 106, and the second string-shaped member 114 are located.

As described above, the fixed support pin 1 of the immovable support plate 108 is provided on one side of the other second string-shaped member 114 having a predetermined length.
16 is immovably supported, and the other side is movably supported by the spacing pin 90 of the movable support plates 82 and 86. Fixed support pins 11 of these immovable support plates 108
6, the second by the spacing pin 90 of the movable support plate 82,86
And a pulley 118 serving as a second moving member contacts the second string-shaped member 114 while being supported by the second support mechanism to move the second string-shaped member 114. To do. Moving support plates 82 and 8 as second interlocking members
The spacing pin 90 of No. 6 is connected to the second string-shaped member 114 on the other side of the portion in contact with the pulley 118, and the movable support plates 82,
They are connected via 86.

Further, a pulling spring 132 as an elastic body for pulling back the second string-like member 114 is provided, and the pulling spring 132 is integrated with the lower part of the movable support plates 82 and 86 in FIG. 6 and the pulley 118 integrally. It is hung between the moving pulley attachments 134 and is arranged to attract them to each other. The spacing pin 90 as the second interlocking member, the pulley 104 as the first moving member, and the pulley 100 as the movement supporting member that movably supports the other side of the first string-like member 106 are integrally formed. Moving support plate 8 to move
It is fixed to 2,86. Further, the first string-like member 106 on the further right side (the other side) of the pulley 100 as the moving support member is immovably supported by the fixed support pin 112 of the immovable support plate 108. Therefore, the pulling spring 132 may be shorter than that of the pulling spring that pulls back the first string-like member 106 that moves four times longer than the second cord-like member 114, and the size is reduced.

For example, this cassette contact body 120 is shown in FIG.
When the pulley 11 is moved downward by a distance d, the pulley 118 pushes the second cord-like member 114 downward,
8 and the cassette contact body 120.
By rotating the pulley 118 from the right side (movable support side) of the pulley 118 to the left side (non-movable support side), the second string-like member 114 is fed by the length d, and the second string-shaped member 114 on the right side in FIG.
The spacing pin 90 connected to the end of the cord-shaped member 114 of FIG. That is, this pulley 1
18 functions as a moving pulley.

At this time, the end portion of the right second cord-shaped member 114 in FIG. 7 is fixed to the spacing pin 90, and
A number of movable support plates 82, 86, pulleys 100, 102,
Similarly, 104 also moves downward integrally in FIG. 7 by a distance of 2 × d. As they move downward, the intermediate portion of the first string-shaped member 106 is pushed downward by the pulley 104 in FIG. 7, and the pulley 104 is moved from the right side (movable support side) to the left side (non-movable support). Rotation of the pulley 104 to the side) causes the first string-like member 106 to have a length of 2 ×
Only the d is sent, and the pulley 10 to the right of the pulley 104 is further transmitted.
The first fixed to the first string-like member 106 on the right side of 0
The interlocking member 78 and the yarn holding member 50 of FIG. 6 move downward in FIG. 6 by a distance of 4 × d. In this way, the cassette contact body 12
The moving mechanism 52 is configured so that a moving amount of 0 produces a moving amount of 4 times.

Next, the threading hook 35 of the sewing machine 10
The threading hook mechanism 55 for moving the will be described. Similar to the sewing machine described in the above-mentioned applicant's application, as shown in FIG. 9, the threading hook 3 capable of entering the eye hole 51 of the needle 36.
5, a biasing member 136 that constantly biases the threading hook 35 upward, an advance / retreat mechanism 138 that moves the threading hook 35 into and out of the eye hole 51 of the needle 36, and the biasing force of the biasing member 136. Then, the transmission member 48 movable between the transmission position for transmitting the downward force for moving the threading hook 35 downward and the interruption position for interrupting the transmission of the downward force, and the yarn cassette 4
4 and a cassette contact body 139 provided in the cassette insertion portion 46 for lowering the threading rod 47 with the mounting of No. 4. A part of the lower side of the hook 35 is recessed upward, and the recessed part catches the thread.

The biasing member 136 is a tension spring for constantly biasing the threading rod 47 upward. Advance mechanism 13
The reference numeral 8 designates a rotating member 140 (see FIG. 10) mounted above the threading rod 47, a pin 142 protruding horizontally from the threading rod 47, and the like. This rotating member 140
According to the above, as the thread cassette 44 is attached, the threading rod 47
Of the adjusting pin 1 which is lowered and protrudes from the threading rod 47.
When 44 abuts on the height adjusting member 146 fixed to the needle bar 26, the pin 142 of the threading rod 47 descends along the linear groove 148 of the rotating member 140. And the threading rod 47
When the pin 142 descends to a predetermined position, the pin 142 moves to the rotating member 1.
40, the threading rod 47 and the threading hook 35 rotate, and the threading hook 35 moves to the eye hole 5 of the needle 36.
1 to project from the opposite side of the eye hole 51 of the needle 36. Then, when the transmission member 48 is in a blocking state close to the vertical posture and the threading rod 47 is lifted by the urging force of the urging member, the threading hook 35 rotates in the reverse direction, and the threading hook 35 of the needle 36 moves. It retreats from the eye hole 51.

The transmission member 48 is slidably passed through the guide shaft 151, the central portion of the transmission member 48 is rotatably supported, and the biasing member 152 which is a winding spring is located at the transmission position shown in FIG. Is urged by. When in the transmission position, the transmission member 48 is slightly inclined from the vertical posture, and the upper end 153 of the transmission member 48 comes into contact with the upper side of the abutting portion 154 of the upper portion of the rotating member 140 to move the threading rod 47. The descending force can be transmitted. Further, the transmission member 152 is rotated against the urging force of the urging member 152,
When moved to the cutoff position shown in FIG. 12, the upper end 153 of the transmission member 48 is separated from the contact portion 154. That is, the threading rod 47 can be raised by the urging force of the urging member 136. An ABS or polyacetate resin for protecting the contact portion 154 of the resin rotary member 140 is wound around the upper portion 153 of the metal transmission member 48.
The transmission member 48 is constantly urged upward by the urging member 155 which is a pulling spring.
When it is attached, it is moved downward against its urging force.

Unlike the above-mentioned applicant's application, this sewing machine 10 is provided with a contact member 158 for contacting the transmission member 48 and moving the transmission member 48 to the blocking position as follows. When the moving mechanism 52 moves the yarn holding member 50 to a predetermined position, the contact member 158 contacts the transmission member 48 and moves the transmission member 48 to the blocking position, so that the contact member 158 moves to the support block 54. It is fixed. That is,
The support block 54 is fixed to the sewing machine frame 24, and the abutting member 158 is arranged so as to be at a fixed position regardless of the vertical movement or horizontal swing of the needle bar 26 or the needle 36. There is. The predetermined position of the thread holding member 50 means the eye hole 5 of the needle 36 from which the threading hook 35 projects.
On the opposite side of 1, the threading hook 35 catches the thread T, so that the threading hook 3 protruding from the eye hole 51 of the needle 36
It is a position above 5. That is, the thread T rises so as to intersect with the threading hook 35 protruding from the eye hole 51 of the needle 36, and the thread T is positively pressed against the lower side of the threading hook 35 to bend the thread T slightly. It is the position where it is made.

In this sewing machine 10, unlike the above-mentioned applicant's application, the slit type balance 32 and the balance 3 are provided.
A plate-shaped guide member 160 that extends to the left and right sandwiching 2 is provided, and when the thread T stretched horizontally from above the thread balance 32 by the thread cassette 44 descends along the upper end of this guide member 160, The sewing machine 10 is configured so that the thread T is guided to the balance 32.

Also, in this sewing machine 10, unlike the above-mentioned applicant's application, the thread cassette 44 has the above-mentioned balance 32.
There is a thread T stretched separately from the thread holding member 5
When the yarn cassette 44 is mounted, the yarn 0 catches another yarn T, and the yarn T is moved downward toward the eye hole 51 of the needle 36.

The threading operation when the thread cassette 44 is mounted on the sewing machine 10 having the above-described structure will be described.

The operator inserts the yarn cassette 44 into the cassette mounting portion 46 from above, and pushes the yarn cassette 44 downward until the yarn cassette 44 reaches the bottom of the cassette mounting portion 46. The threading on the balance 32 and the threading on the eye hole 51 of the needle 36 are completed. At this time,
A part of the right side of the yarn cassette 44 pushes the cassette contact body 120, and a part of the center side of the yarn cassette 44 pushes the cassette contact body 139 downward. That is, the manual operation of pushing the yarn cassette 44 downward causes the advancing / retreating mechanism 139 and the moving mechanism 52 of the threading mechanism 38 to operate manually. By that operation, the threading rod 47 descends.

Further, in front of the yarn cassette 44, the yarn T is stretched and stretched in a direction orthogonal to the paper surface of FIG. 6, and the stretched yarn T is lowered from the position of FIG. 13 to a yarn holding member. Captured by 50. Cassette contact body 12
At this time, the yarn holding member 50 moves about four times the distance that 0 has been pushed and moved by the yarn cassette 44. And
As shown in FIG. 14, the yarn holding member 50 is most lowered.
At this time, a predetermined upper and lower range (Fig.
5 shows a thread holding member 162 positioned for threading through the eye holes 51 of the needle 36 at the upper limit position and the lower limit position).
Below the position where the threading hook 35 projects from the opposite side of the eye hole 51 of the needle 36 that stops at the lowest position, the moving mechanism 52 moves both of the thread holding arms 62 and 64 of the thread holding member 50. After the movement, the threading hook 35 is projected by the advancing / retreating mechanism 138 from the opposite side of the eye hole 51 of the needle 36, as shown in FIG. As shown in FIG. 15, the positions of the thread holding arms 62 and 64 for holding the thread T are slightly shifted up and down, but all of the thread holding positions are at the lowest position of the threadable range. It is below the position where the threading hook 35 projects from the opposite side of the eye hole 51 of the stopped needle 36.

The moving mechanism 52 moves the thread holding member 50 upward so as to move the two thread holding arms 62 and 64 above the thread passing hook 35 protruding from the eye hole 51 of the needle 36. That is, when the eye hole 51 of the needle 36 is located in the upper and lower range in which the thread can be threaded as shown in FIG. 15, the thread holding member 50 is provided below the thread passing hook 35 protruding from the eye hole 51 of the needle 36. Since the thread holding member 50 moves up after the movement, unlike the conventional method in which the thread T is simply stretched, the thread T is positively crossed with the threading hook 35. It should be noted that, when threading, the moving mechanism 52, out of the predetermined vertical range in which threading can be performed on the needle 36, regardless of the vertical stop position of the needle bar 26 and the horizontal swing position.
Since the thread holding member 50 has only a certain moving path below the position where the threading hook 35 projects from the opposite side of the eye hole 51 of the needle 36 that stops at the lowest position, there is only a certain moving path. 52 has a simple structure.

At the time of this rise, the threading hook 35 is moved between the two thread holding arms 62 and 64 from the most lowered position shown in FIG. When the thread holding member 50 is moved to a predetermined position where the two thread holding arms 62 and 64 reach above the threading hook 35, the transmission member 48 abuts the abutment member 158 and the transmission is performed. From the position to the blocking position, the elastic force of the elastic body causes the threading bar 47
Rises upward.

In this ascending process, as shown in FIG. 17, the threading hook 35 is supported by the threading hook holding member 162, and the tip of the left thread holding arm 62 is located below the threading hook holding member 162. Therefore, the ascending speed of the yarn holding member 50 by the moving mechanism 52 is suppressed, and the yarn holding member 50 does not move unidirectionally above the eye hole 51 of the needle 36. That is, a load of contact between the thread holding member 50 and the threading hook holding member 162 is applied to the pulling spring 132 that pulls back the second string-shaped member 114, and the rising speed of the thread holding member 50 is suppressed. (Reduced). The thread holding member 50 and the threading hook thread holding member 1
62, the threading rod 47 rotates counterclockwise and the threading 35
Continues until it is completely separated from the eye hole 51 of the needle 36.
As shown in FIG. 18, the threading hook 35 is retracted from the eye hole 51 of the needle 36, the contact between the thread holding member 50 and the threading hook holding member 162 is released, and the second tension spring 132 causes the second thread to move. The string member 114 is pulled back, and the yarn holding member 50 increases in speed and rises.

When the cassette contact member 120 is pushed by the yarn cassette 44 and moved by a predetermined amount, it retracts from the movement path of the yarn cassette 44 and the pulling spring 132 comes into effect so that When the string-shaped member 114 is pulled back, as shown in FIG.
Return to the original state as shown in. That is, the thread holding member 50 moves up.

In the above-described embodiment, the invention of the present application is implemented in the sewing machine 10 using the thread cassette 44. However, as compared with the sewing machine 10 not using the thread cassette 44,
The present invention may be implemented. In that case, a threading operation lever is provided, and the threading mechanism 38 is configured to be operated by the manual operation of the threading. In the above-described embodiment, the invention of the present application is implemented in the sewing machine 10 that swings the needle 36 horizontally relative to the sewing machine frame 24, but is used in the sewing machine 10 that does not swing the needle 36 in the horizontal direction. May be.

In the above-described embodiment, the thread T is stretched in the horizontal direction, but the thread T may be stretched in the vertical direction. In that case, the thread T is moved horizontally and the threading hook 3 is moved.
5 and the thread T intersect. In the above-described embodiment, the two thread holding arms 62 and 64 are moved, but at least one thread holding member 50 may be used as long as the thread T intersects the threading hook 35.

In the above-described embodiment, the thread holding member 50 is moved using the moving pulley, but the threading hook 3 is used.
You may move 5. Further, in the above-described embodiment,
Although a thin wire is used, a toothless belt, a timing belt, a gear or the like may be used. Although the movable pulley is used in the above-described embodiment, a simple columnar member may be used as long as the string-like member can be moved in the same manner.

In the above-described embodiment, the needle 3 is moved in the left-right direction.
Although the invention of the present application is applied to the sewing machine 10 that swings the needle 6, the sewing machine 10 that swings the needle 36 in the front-rear direction may be used.

In the above-described embodiment, the thread holding member 50 descends in parallel with the needle 36 in the predetermined range near the needle 36 after the thread holding member 50 has approached the needle 36, and again moves to the needle 36. Although the moving mechanism 52 is configured to rise in parallel, the moving mechanism 52 may move the thread holding member 50 obliquely with respect to the needle 36 instead of being parallel to the needle 36. In the embodiment described above, the thread holding member 5
The thread holding member 5 is moved during both movements of 0 when descending and 1 when ascending.
Although the moving mechanism 52 moves 0 in parallel with the needle 36, the moving mechanism 5 moves the thread holding member 50 in parallel with the needle 36 only when moving either downward or upward.
2 may move.

[0052]

As is apparent from the above description,
In the sewing machine according to claim 1, the moving speed of the thread holding member by the moving mechanism is suppressed in the vicinity of the threading hook protruding from the side opposite to the eye hole of the needle by the advancing / retreating mechanism, so that the thread is inserted in the eye hole of the needle. The thread can be reliably threaded.

In the sewing machine according to the second aspect, since the moving speeds of the plurality of thread holding portions are suppressed, the thread can be surely threaded through the eye hole of the needle.

In the sewing machine according to the third aspect, since the moving speed of the thread holding member is suppressed until the threading hook retracts from the eye hole of the needle, the thread can be reliably threaded through the eye hole of the needle. .

In the sewing machine according to the fourth aspect, the threading hooks projecting from the opposite side of the eye hole of the needle by the advancing / retreating mechanism are passed through with the plurality of thread holding parts sandwiched therebetween, and then the threading hooks are Since the moving speed of at least one of the thread holding portions is suppressed until the thread is retracted from the eye hole of the needle, the thread can be reliably threaded through the eye hole of the needle.

In the sewing machine according to the fifth aspect, when the threading hook retracts from the eye hole of the needle, the restriction of the moving speed of the thread holding member is released, so that the thread can be surely threaded through the eye hole of the needle. it can.

In the sewing machine according to the sixth aspect, the threading hook holding member and the thread holding member are brought into contact with each other to suppress the moving speed of the holding member until the threading hook retracts from the eye hole of the needle. The thread can be surely threaded through the eye hole of the needle.

In the sewing machine according to the seventh aspect, the needle and the threading hook are swung relative to the sewing machine frame and the moving mechanism, without increasing the size of the sewing machine and the swinging mechanism.
The thread can be reliably threaded through the eye hole of the needle.

[Brief description of drawings]

FIG. 1 is an external view of the entire sewing machine according to the present embodiment.

FIG. 2 is a perspective view of the entire sewing machine according to the present embodiment.

FIG. 3 is a diagram showing a side surface of a yarn holding member and a moving mechanism thereof according to the present embodiment.

FIG. 4 is a diagram showing a front surface of a balance mechanism or the like according to the present embodiment.

FIG. 5 is a diagram showing components to which the moving mechanism according to the present embodiment is attached.

FIG. 6 is a diagram showing components constituting the moving mechanism according to the present embodiment.

FIG. 7 is an overall view showing a moving mechanism according to the present embodiment.

FIG. 8 is an overall view showing a moving mechanism according to the present embodiment.

FIG. 9 is a diagram showing a transmission member and a contact member according to the present embodiment.

FIG. 10 is a diagram showing a rotating member according to the present embodiment.

FIG. 11 is a diagram showing a transmission member and an abutting member in a transmission position according to the present embodiment.

FIG. 12 is a diagram showing a transmission member and an abutting member in a blocking position according to the present embodiment.

FIG. 13 is an overall view showing a thread holding member and a moving mechanism in a raised position according to the present embodiment.

FIG. 14 is an overall view showing a yarn holding member and a moving mechanism at a lowermost position according to the present embodiment.

FIG. 15 is a diagram showing a thread holding member at an upper limit position and a lower limit position of a threadable range according to the present embodiment.

FIG. 16 is a view showing a state where the threading hook according to the present embodiment projects from the side opposite to the eye hole of the needle.

FIG. 17 is a view showing a state where the threading hook holding member and the thread holding member according to the present embodiment are in contact with each other.

FIG. 18 is a view showing a state where the threading hook holding member and the thread holding member according to the present embodiment are in contact with each other.

[Explanation of symbols]

10 sewing machine 24 sewing machine frame 36 needles 48 Transmission member 50 Thread holding member 51st hole 52 moving mechanism 106 first string-shaped member 114 Second string-shaped member 140 rotating member 162 threading hook holding member T thread

Claims (7)

[Claims] 1. A threading hook capable of entering and retracting into the eye hole of a needle, and causing the threading hook to enter the eye hole of the needle, the threading hook projecting to the opposite side of the eye hole of the needle. A moving mechanism that moves the thread holding member so that the thread holding member that holds the thread moves away from the thread holding member that approaches the opposite side of the eye hole of the needle. In the vicinity of the operating member operated to manually operate the advancing / retreating mechanism and the moving mechanism, and the threading hook protruding from the side opposite to the eye hole of the needle by the advancing / retreating mechanism, A sewing machine, comprising: a speed suppressing mechanism that suppresses a moving speed of the thread holding member. 2. The yarn holding member has a plurality of yarn holding portions separated from each other so that the yarn holding member extends and holds the yarn in a predetermined direction, and the speed suppressing mechanism has a moving speed of the plurality of yarn holding portions. The sewing machine according to claim 1, wherein 3. The sewing machine according to claim 1, wherein the speed suppressing mechanism suppresses the moving speed of the thread holding member until the threading hook retracts from the eye hole of the needle. 4. The yarn holding member has a plurality of yarn holding portions which are separated so as to extend and hold the yarn in a predetermined direction, and the speed suppressing mechanism is configured to move the needle eye hole by the advancing / retreating mechanism. After passing through the threading hook projecting from the opposite side of the plurality of thread holding parts sandwiched between them,
The sewing machine according to claim 1, wherein a moving speed of at least one of the thread holding portions is suppressed until the threading hook retracts from the eye hole of the needle. 5. The speed suppressing mechanism releases the restriction of the moving speed of the thread holding member when the threading hook retracts from the eye hole of the needle. Sewing machine described in. 6. A threading hook holding member for holding the threading hook, wherein the speed suppressing mechanism suppresses movement of the thread holding member until the threading hook retracts from the eye hole of the needle. The sewing machine according to any one of claims 3 to 5, wherein the threading hook holding member and the thread holding member are brought into contact with each other. 7. The needle and the threading hook are oscillated relative to a sewing machine frame, and the moving mechanism is supported by the sewing machine frame to move the thread holding member in a fixed path. A mobile device that moves.
The sewing machine according to any one of 1 to 6.