TWI461583B - On the stitching sewing machine - Google Patents

Description

Decorative sewing sewing machine Technical field

SUMMARY OF THE INVENTION The present invention is directed to a decorative stitching sewing machine having an adjustable spacing of a plurality of sewing needles.

Background technique

As shown in Fig. 8, the upper decorative stitching sewing machine is a sewing machine in which a plurality of sewing stitches B are formed in a relatively parallel manner by a plurality of sewing needles, and the upper decorative thread K is sewn to the sewing machine of the parallel sewing stitches while being meandered.

The above-mentioned decorative sewing sewing machine is a so-called stitching type upper decorative sewing machine. As shown in Fig. 9, the sewing machine is operated by a fixed knife and a moving knife which are disposed on the presser foot 110 to press the edge portions to press each other to lift the two fabrics in an upwardly standing state, and the cutting edge is cut off. The upper end of the portion is erected so that the ends are aligned, and the aligned ends are lowered, and one of the ends is placed on the other side, and the stitching is performed on the overlapping portion.

The upper decorative stitching sewing machine 100 has a needle bar 105 having four sewing needles 101 to 104 arranged in a line in a direction perpendicular to the cloth transport direction (A arrow direction); the presser foot 110 is pressed from above The cloth sticking the object to be sewn; the pressing bar 111 is the bottom end supporting the pressing foot 110; the pressure spring 112 is the pressing cloth pressure generated by the pressing foot 110 through the pressing bar 111; The carrier 121 and the hook 122 are operated together while the upper decorative line K is held in an extended state, so that the upper decorative line K is transported between the sewing needles 102 and 103 at the time of the lower needle. The direction crosses the person; the main shaft 106 of the sewing machine is fully rotated by the sewing machine motor; the power transmission mechanism 130 transmits the shaking (reciprocating) motion to the swinging rotary shaft 107; the first transmission mechanism 140 The rocking rotary shaft 107 transmits the rocking power to the carrier 12; and the second transmission mechanism 150 transmits the rocking power to the hook 122 by the rocking rotary shaft 107. The lower end of the needle bar 105 is provided for holding the fourth The needle holder 108 of the root sewing needles 101 to 104.

The presser bar 111 holding the presser foot 110 at the lower end portion is adjacent to the needle bar 105 and supported by a sewing machine frame (not shown).

The swinging rotary shaft 107 has a cylindrical shape, and the aforementioned pressing rod 111 is inserted into the cylinder. The swinging rotary shaft 107 is rotatably supported by the metal bearing 109 by a sewing machine frame (not shown), and the center of rotation of the swinging rotary shaft 107 coincides with the axial center of the pressing rod 111.

The power transmission mechanism 130 that imparts the swinging and rotating shaft 107 to the swinging rotation shaft 107 is an eccentric cam 131 fixedly mounted on the main shaft 106, a reciprocating rod 132 that rotatably holds the eccentric cam 131 at one end portion, and a reciprocating rod The other end portion of the 132 is held by a shaft member 133 that swings the upper end portion of the swing shaft 107.

The reciprocating rod 132 is perpendicular to the main shaft 106 and faces an almost horizontal direction. Since the eccentric cam 131 is eccentric with respect to the main shaft 106, when the main shaft 106 is rotationally driven, one end portion of the reciprocating rod 132 performs a wraparound motion centering on the main shaft. When one end of the reciprocating rod 132 performs a circular motion, only the horizontal direction component is transmitted to the other end portion, and the other end portion performs an advancing and retreating motion almost in the horizontal direction. The other end portion of the reciprocating rod 132 is coupled to the wrap shaft member 133 through the spherical bearing 132a, and the forward and backward movement in the direction in which the reciprocating rod 132 extends is transmitted to the wrap shaft member 133. As a result, the wrap shaft member 133 performs a rotational motion centering on the press bar 111 together with the swing rotary shaft 107, and the swing rotary shaft 107 performs the wobble rotation. Although the other end portion of the reciprocating rod 132 is linearly moved, the operation of the circumference of the wrap shaft member 133 can be accommodated by the action of the spherical bearing 132a.

In FIGS. 10 and 11, the first transmission mechanism 140 has a rotation arm 141 coupled to the lower end portion of the swing rotary shaft 107, and a drive end coupled to the rotary end portion of the rotary arm 141 at one end. The lever 142 and the lever end are coupled to the lever shaft 143 at the other end of the transmission link 142.

The swing arm 141 has a recessed portion 141a that is locked with the hook portion 107a provided at the lower end portion of the swing rotary shaft 107, and is rotated integrally with the swing rotary shaft 107 around the presser bar 111. Further, the swing arm 141 extends in a radial direction centered on the press bar 105, and is coupled to one end of the drive link 142 in the vicinity of one of the side faces of the extended end portion.

The lever shaft 143 is integrally formed by the support shaft portion 143a and the lever portion 143b, wherein the support shaft portion 143a is rotatably supported by the presser foot 110 in a state in which the axial center is in the up and down direction, and the lever portion 143b The upper end portion of the support shaft portion 143a extends in the vertical direction. Further, the front end portion of the lever portion 143b is coupled to the other end portion of the transmission link 142, and the lower end portion of the support shaft portion 143a is supported as the shaft of the carrier 12.

According to the above configuration, the first transmission mechanism 140 constitutes a four-node link mechanism that swings the rotary shaft 107 as a section, and is configured to transmit the swing rotation to the carrier 12 in synchronization with the swinging of the rotary shaft 107. .

The second transmission mechanism 150 is configured to share the rotation arm 141 with the first transmission mechanism 140, and is composed of a rotation arm 141, a transmission link 152 whose one end is coupled to the rotation end of the rotation arm 141, and The lever shaft 153 is coupled to the lever shaft 153 at the other end of the transmission link 152.

The lever shaft 153 is integrally formed by the support shaft portion 153a and the lever portion 153b, wherein the support shaft portion 153a is rotatably supported by the presser foot 110 in a state in which the axial center is in the up and down direction, and the lever portion 153b The upper end portion of the support shaft portion 153a extends in the vertical direction. Further, the front end portion of the lever portion 153b is coupled to the other end portion of the transmission link 152, and the lower end portion of the support shaft portion 153a is supported as the shaft of the hook 122.

The second transmission mechanism 150 is the same as the first transmission mechanism 140, and also constitutes a four-node linkage mechanism that swings the rotary shaft 107, and transmits the swinging rotation to the hook 122 in synchronization with the swinging rotation shaft 107. Construction.

In Figs. 13 and 14, the carrier 121 is rotated by the rotation to repeatedly advance the rotating end portion (toward the sewing needles 101 to 104) and to retreat (from the sewing needles 101 to 104 toward the cloth). The conveying direction is in a direction away from one side of the self, and the rotating front end portion is formed by the cylindrical portion 121a and the claw portion 121b that guide the upper decorative line K. The tubular portion 121a maintains the upper decorative line regardless of whether the carrier 12 is moved in either of the front and rear directions, and the claw portion 121b holds the upper decorative line K only when advancing. When retreating, it becomes a liberate shape (for example, a shape that is open in front). Further, the tubular portion 121a is located outside the center of the rotation center of the claw portion 121b, and the cylindrical wire portion 121a is inserted from the outside by the wire supply source output upper decorative wire K. Further, when the carrier 12 is advanced, the tubular portion 121a reaches the outer side (left side) of the left outer needle (the leftmost sewing needle when the cloth transport direction A is the front), and the claw portion 121b reaches the left outer needle 101 and Between the left middle needle 102.

The hook 122 is swung by a swing so that the swivel end portion is repeatedly moved (advanced) and from the direction toward the right side (Fig. 13) of the sewing needles 101 to 104 at the same timing as the advance and retreat of the carrier 12 The sewing needles 101 to 104 are moved (retracted) in a direction opposite to the cloth transport direction and away from the left side (Fig. 14). The swivel front end portion of the hook 122 forms a hook portion 122a for catching the upper decorative line K. The hook portion 122a protrudes below the bottom surface of the hook and has a structure in which the sharp front end portion is retracted in the backward direction. Thereby, the hook 122 can be caught from the carrier 12 toward the fabric upper decorative line K as it advances.

In the above-described decorative sewing machine 100, the main shaft 106 is rotationally driven by driving the sewing machine motor, and the needle bar 105 is moved up and down. Then, the rotational driving of the main shaft 106 is converted into a rocking and rotating motion by the power transmission mechanism 130 and transmitted to the rocking rotary shaft 107, and the first transmission mechanism 140 and the second transmission mechanism 150 are synchronized with the sewing needles 101 to 104 to move up and down. The carrier 12 and the hook 122 are swung and rotated.

Then, as shown in Fig. 13, the carrier 12 and the hook 122 advance, and the annular portion 121a of the carrier 121 reaches the left of the left outer needle 101, and the claw 121b reaches the left outer needle 101. Between the left middle needle 102 and the hook 122a of the hook 122 reaches the right rear of the right outer needle 104. Thereby, the upstream portion (line supply source side) K1 of the upper decorative line K is held inside the left outer needle 101 and the left middle needle 102 in the transport direction, and the loop portion of the downstream portion (cloth side) K2 is The hook portion 122a is caught and passed between the left middle needle 102 and the right middle needle 103, and is held at the rear side in the transport direction of the right middle needle 103 and the right outer needle 104. Then, the lower needle is performed in this state to sew the upper decorative line K.

Further, when the sewing needles 101 to 104 are raised to exit from the cloth. As shown in Fig. 14, the carrier 121 and the hook 122 are retracted, and the hook portion 122a of the hook 122 is disengaged from the curved portion of the downstream portion K2 of the upper decorative line K, and is retracted by the carrier 121. The hook 122 is caused to break into the triangular curved portion K3 newly formed by the upper decorative line K between the thread supply source and the previous stitching stitch. When the hook 122 is advanced for the next time, the hook portion 122a catches the upper decorative line K to form the curved portion of Fig. 13. Then, the upper decorative stitching is carried out in response to the aforementioned behavior. (Refer to Non-Patent Document 1)

[Non-Patent Document 1] JUKI Co., Ltd. issued "Send Out Wrist watch ” "36200Series P.30-37, issue date: December 2006

However, the above-described upper decorative sewing machine can exchange the needle holder 108 and the needle plate (not shown) in response to the change of the sewing stitch to perform the change adjustment of the needle width (the interval between the sewing needles). At this time, since the position of the needle under each sewing needle is also changed, the cylindrical portion 121a and the claw portion 121b of the above-described carrier 12 interfere with the sewing needle. Therefore, the necessity of changing the arm length of the carrier 12 is generated, however, since the carrier 111 is adjusted as such, the line path from the claw portion 121b to the hook portion 122a is changed, and the hook 122 cannot be caught. In the case of the line, the hook 122 also has the necessity of changing the length of the arm.

Thus, it is known that when the decorative sewing machine changes the needle width, there is a problem in that the carrier and the hook are exchanged.

Moreover, since the carrier 12, the hook 122, and the transmission mechanisms 140 and 150 are all united on the pressing foot 110, the adjustment of the needle width is performed by the pressing foot 110. However, the aforementioned presser foot 110 needs to be adjusted during installation to adjust the left and right positions or to avoid competition for up and down motion. In particular, it is difficult to smoothly adjust the position of the presser foot 110 so that the vertical movement does not compete without competing. If the adjustment is insufficient, the action of the presser foot 110 cannot follow the section of the cloth, etc., for the cause of poor stitching. . Therefore, there is also a problem in that the presser foot 110 that requires complicated and precise position adjustment is required when the needle width is changed.

Further, when the position of the lower needle is changed as the needle width is changed, the rocking angle of the carrier 12 and the hook 122 also needs to be changed. To change the rocking angle of the hook 122, the wrap member 133 is exchanged to change the inter-center distance from the center of rotation of the wrap member 133 to the center of the spherical bearing 132a. When the aforementioned shaft member 133 is exchanged, the presser foot 110 is removed from the press bar 111, and after the pressure spring 112 is removed, the press bar 111 is removed from the sewing machine frame, and the shaft member 133 is removed from the reciprocating rod 132. And the rocking and rotating shaft 107 is removed, and the shaft member 133 corresponding to the needle width is exchanged. Further, after the package shaft member 133 is exchanged, in order to operate the carrier slider 121 and the hook 122 in the correct phase in the swing rotation shaft 107, the phase adjustment operation of the shaft shaft member 133 and the rocking shaft 107 is also indispensable. problem.

In this way, when the needle width is changed, it is not only necessary to exchange the needle holder and the needle plate, and there is a problem that the complicated work of most other parts is exchanged and adjusted.

The invention aims to improve the working efficiency by changing the needle width without changing the carrier and the hook, and easily adjusting the carrier and the hook.

The invention described in claim 1 is an upper decorative stitching sewing machine having: a plurality of sewing needles arranged in a row in a direction intersecting the cloth conveying direction, and reciprocating up and down; The weft and the hook are kept together with the needle thread passing through the plurality of sewing needles, and the decorative thread forming the upper decorative sewing stitch is maintained, and the reciprocating movement of the sewing needle is linked to shake the swinging person; the rotating rotating shaft is shaken Linking to the main shaft of the sewing machine, and rotating the rotator about the vertical axis; the first transmission mechanism is disposed between the rocking rotary shaft and the carrier, and transmits the rocking power of the rocking rotary shaft to And a second transmission mechanism disposed between the rocking rotary shaft and the hook, transmitting the rocking power of the rocking rotary shaft to the puller, and having a first adjusting mechanism, adjusting from the foregoing The distance from the center of rotation of the carrier to the front end; and the second adjustment mechanism adjusts the distance from the center of rotation of the hook to the front end.

The invention described in claim 2 has the same configuration as the invention described in claim 1, wherein the first adjustment mechanism has a first rotation axis and is disposed eccentrically with respect to the first rotation axis And supporting the first eccentric shaft portion of the carrier, the second adjustment mechanism has a second rotation shaft and a second eccentric shaft portion that is eccentric with respect to the second rotation shaft and supports the hook.

The invention described in claim 3 has the same configuration as the invention described in claim 1 or 2, and is fixed in the radial direction of the rocking shaft by being fixed to the rocking rotary shaft. An extending arm member and an advancing and retracting member at both ends of the arm member and the main shaft of the sewing machine are provided to impart a wobble motion to the swinging rotary shaft; and a connecting portion between the arm member and the advancing and retracting member is provided The connected positions are moved along the radial direction to adjust the adjustment of the rotation angle adjustment mechanism.

The invention described in claim 4 has the same configuration as the invention described in claim 3, wherein the rotation angle adjustment mechanism has a long hole formed in the arm member along the radial direction and A locking member that is locked in the longitudinal direction of the long hole is movable.

The invention described in the first aspect of the patent application can exchange the weft feeder and the hook when the needle width is changed. As a result, since it is not necessary to perform the work of exchanging the presser foot with the exchange of the carrier and the hook, it is not necessary to perform complicated work of adjusting the position of the presser foot.

Therefore, when the needle width of the sewing machine is changed, it is possible to easily adjust the needle width without performing complicated operations such as part exchange or position adjustment.

The invention described in claim 2 can adjust the distance from the rotary end of the carrier and the hook to the center of the rotation by operating and rotating the rotary shaft in accordance with the eccentric amount. Therefore, the adjustment of the rotational radius of the carrier and the hook accompanying the adjustment of the needle width can be easily performed.

In the invention described in claim 3, when it is necessary to change the needle width to change the rocking angle of the carrier and the hook, the adjustment swing angle can be changed only by the adjustment operation of the joint position, and it is not necessary to The power transmission mechanism that imparts power to the swinging shaft is subjected to component exchange work, and workability can be improved.

The invention described in claim 4 of the patent application can be more easily adjusted by a simple configuration to improve work efficiency.

Detailed description of the preferred embodiment

(The overall composition of the embodiment of the invention)

Hereinafter, the decorative stitch sewing machine 10 according to the embodiment of the present invention will be described with reference to Figs. 1 to 7 . The same components as those of the above-described decorative sewing machine 100 are designated by the same reference numerals and the description thereof will not be repeated.

As shown in FIGS. 1 and 2, the upper decorative sewing machine 10 has the above-described needle bar 105, presser foot 110, presser bar 111, pressure spring 112, carrier 12, hook 122, spindle 106, and shaking. The shaft 107 is rotated, and further includes a power transmission mechanism 30 that transmits power from the main shaft 106 to the swing rotary shaft 107, and a first transmission mechanism 40 that transmits the rocking power to the carrier 12 from the swing rotary shaft 107. The swinging rotary shaft 107 transmits the second transmission mechanism 50 for swinging the rotary power to the pull hook 122, the first adjustment mechanism 70 for adjusting the distance from the rotary end portion of the carrier 12 to the rotation center, and the rotation of the slave hook 122. The second adjustment mechanism 80, which is the distance from the end to the center of rotation, holds all of these components in the sewing machine frame 20.

In addition, the above-described upper decorative stitching sewing machine 10 is also a curved arm type decorative stitching sewing machine (stitching type), and conveys the cloth as a material to be sewn along the bed portion 21 of the sewing machine frame 20, and at the time of the sewing operation, The operator performs the sewing operation from the side of the vertical trunk portion 22, and the sewing machine frame 20 has a shape in which the bed portion 21 and the arm portion 23 do not overlap in order to make the hand movement easy to see. That is, the bed portion 21 and the arm portion 23 extend in different directions around the vertical trunk portion 22, and the arm portion 23 is designed to be bent in the middle so that the front end portion is directly above the end portion of the bed portion 21.

(power transmission mechanism)

In the third and fourth figures, the power transmission mechanism 30 that imparts the swinging rotation to the swinging rotary shaft 107 has an eccentric cam 31 fixedly mounted to the main shaft 106, and is rotatably fitted to the eccentric cam 31. a cam member 34 that is inserted and held, a shaft shaft member 33 fixed to an upper end portion of the swinging rotary shaft 107, a swing angle adjusting mechanism 35 that adjusts a swinging rotation angle of the swinging rotary shaft 107, and a transmission The rotation angle adjusting mechanism 35 is coupled to the shaft member 33 that is fixed to the swinging rotary shaft 107 and the reciprocating rod 32 of the cam member 34 that is supported by the spindle. That is, both ends of the reciprocating rod 32 are coupled to the swing rotary shaft 107 and the main shaft 106.

The cam follower 34 rotatably supports the eccentric cam 31, and performs a wraparound motion by the eccentric cam 31 as the main shaft 106 rotates.

The shaft shaft member 33 is fixedly disposed at an upper end portion of the swing rotary shaft 107 by a lock screw.

A spherical bearing 32a is provided at both end portions of the reciprocating rod 32, and the cam member 34 and the bobbin member 33 are coupled to the spherical bearing 32a.

The extension portion (swirl arm portion) 36 is integrally formed on the shaft shaft member 33 and extends from the radial direction of the swing rotary shaft 107, and the extension portion 36 is along the extending direction thereof (shake the radial direction of the rotation shaft 107) In the direction), a long hole 36a is formed, and the screw bearing 37 passes through the spherical bearing 32a of the reciprocating rod 32, and is inserted into the long hole 36a, and is locked by a nut to be joined together.

Since the reciprocating rod 32 holds the spherical bearing 32a at both end portions thereof, when the cam subordinate member 34 performs the encircling motion, only the reciprocating displacement along the longitudinal direction of the reciprocating rod 32 can be transmitted to the side of the wrap shaft member 33.

Thus, the screw rod 37 can be arbitrarily adjusted along the long hole 36a by loosely opening the nut at the lower end portion thereof, and can be fixed at any position by the lock nut. The locking member can be formed by the screw lever 37 and the nut 38.

Thereby, when the screw lever 37 is fixed toward the inner side of the swivel radius of the extending portion 36, since the inter-center distance from the center of rotation of the bobbin member 33 to the center of the spherical bearing 32a is shortened, the reciprocating rod 32 can be reciprocated. The swinging rotation angle of the swinging rotation shaft 107 caused by the movement is increased, and when the screw rod 37 is brought closer to the outside of the rotation radius of the extending portion 36, since it is fixed from the rotation center of the shaft shaft member 33 to the spherical bearing 32a Since the center-to-center distance becomes long, the swinging angle of the swinging rotary shaft 107 caused by the reciprocating motion of the reciprocating rod 32 can be made small. That is, the amplitude of the swing angle of the swing rotary shaft 107 can be arbitrarily adjusted by adjusting the position of the screw lever 37. Therefore, the rotation angle adjusting mechanism 35 can be configured by the long hole 36a, the screw shaft 37, and the nut 38.

In Fig. 5, the first transmission mechanism 40 has a rotation arm 141 coupled to the lower end portion of the swing rotary shaft 107, a transmission link 142 whose one end portion is coupled to the rotation end portion of the rotary arm 141, and The lever tip is coupled to the lever shaft 43 at the other end of the transmission link 142.

The lever shaft 43 is constituted by a support shaft 43a of an individual member and an arm member 43b, wherein the support shaft 43a is a first rotation shaft supported by the rotatably pressed foot 110 in a state where the shaft center is in the up and down direction. The arm member 43b is attached to the upper end portion of the support shaft 43a and extends in the direction perpendicular to the support shaft 43a, and the lower end portion of the support shaft 43a is transmitted through the rotation of the front end portion of the carrier weft 121. The first adjustment mechanism 70 of the moving radius is coupled to the carrier 121.

According to the above configuration, the first transmission mechanism 40 is configured to swing the rotary shaft 107 as a four-node link mechanism, and is configured to transmit the swing rotation to the carrier 12 in synchronism with the swing rotation shaft 107. .

[0026]

The second transmission mechanism 50 is configured to share the rotation arm 141 with the first transmission mechanism 40, and is composed of a rotation arm 141, a transmission link 152 whose one end is coupled to the rotation end of the rotation arm 141, and The lever shaft 53 is coupled to the lever shaft 53 at the other end of the transmission link 152.

The lever shaft 53 is formed by a support shaft 53a and a lever portion 53b, wherein the support shaft 53a is a second rotation shaft supported by the rotatably pressed foot 110 in a state in which the axial center is in the up and down direction, the lever The portion 53b is attachable to the upper end portion of the support shaft 53a and extends in the direction of the vertical support shaft 53a, and the lower end portion of the support shaft 53a is transmitted through the second adjustment of the rotational radius of the rotary front end portion of the adjustment hook 122. The mechanism 80 is coupled to the base end of the hook 122.

The second transmission mechanism 50 also has the same configuration as the first transmission mechanism 40, and is configured to swing the rotary shaft 107 as a four-node linkage mechanism, and to swing and rotate it synchronously with the swinging rotary shaft 107. Communicated to the construction of the hook 122.

(first and second adjustment mechanisms)

In FIGS. 6 and 7, the first adjustment mechanism 70 has a first planar portion 71 and a second planar portion 72, a locking screw 73, an eccentric shaft portion 74, and a locking screw 75, wherein the first planar portion 71 And the second flat portion 72 is formed on the outer edge of the outer edge of the support shaft 43a of the first transmission mechanism 40, and the locking screw 73 can select and fix the relative angle of the arm member 43b with respect to the support shaft 43a, and the eccentric shaft portion The 74-series is fitted to the base of the carrier 12 integrally formed at the lower end portion of the support shaft 43a, and as the first eccentric shaft portion, the lock screw 75 can fix the carrier 12 at an arbitrary angle to the eccentric shaft. Part 74. Further, the second adjustment mechanism 80 has the same configuration as the first adjustment mechanism 70, and has a first planar portion 81 and a second planar portion 82, a locking screw 83, and a base portion that is fitted to the hook 122 as a second eccentricity. The eccentric shaft portion 84 of the shaft portion and the lock screw 85.

As shown in Fig. 7, since the center line of the eccentric shaft portion 74 (84) with respect to the support shaft 43a (53a) is eccentric, the arm member 43b (53b) with the support shaft 43a (53a) as the center is maintained while the rotation is maintained. When the angle of the carrier 121 (the hook 122) is the support shaft 43a (53a), the distance from the front end of the carrier 121 (the hook 122) to the center of the rotation (the support shaft 43a (53a)) change.

In the present embodiment, since it is conceivable that there are two types of needle widths that can be changed, it is necessary to switch the length of the swirl radius of the carrier 12 and the hook 122 between the two types. Therefore, the upper end portion of the support shaft 43a (53a) is provided with two flat portions 71, 72 (81, 82), and the opposite arms of the two types of the support shafts 43a (53a) are respectively supported by the lock screws 73 (83). The axis angle of the member 43b (53b) is selected and fixed.

As a result, in a state in which the angle of the arm member 43b (53b) centering on the support shaft 43a (53a) and the carrier 12 (the hook 122) is maintained, the flat portion 71 (81) is locked by the lock screw 73 (83). When the shaft angle is fixed, the turning radius of the carrier 12 (the hook 122) (the distance from the center of the rotation to the front end of the rotation) is set to L1, and the locking portion 73 (83) is opposed to the flat portion 72. (82) When the shaft angle is fixed, the turning radius of the carrier 121 (the hook 122) (the distance from the center of the rotation to the front end of the rotation) is set to L2.

Further, the end surface of the support shaft 43a (53a) is subjected to a machining operation by a tool such as the slit 76 (86) so that the angle of the switching shaft can be easily performed.

Further, the position of each of the flat portions 71, 72 (81, 82) and the eccentric amount of the eccentric shaft portion 74 (84) can be appropriately set in accordance with the adjustment amount of the needle width. Further, the flat portion is not limited to two types, and may be provided in a larger number, and may be set to an arbitrary angle without being arranged in a plane.

(Description of the operation of the upper sewing sewing machine)

Since the sewing operation of the upper decorative stitching sewing machine 10 itself is the same as that of the above-described conventional decorative sewing sewing machine 100, the description thereof will be omitted.

Here, the setting switching operation of each part performed by switching the needle width will be described.

When the needle width is switched by exchanging the needle holder 108, first, a pulley (not shown) fixed to the main shaft 106 is operated and rotated to match the phase of the carrier 12 to the most advanced position. Further, in order to change the position of the sewing needles 101 to 104 caused by the change in the needle width, the turning radius of the carrier 121 and the hook 122 is adjusted. That is, in a state where the angle of the arm member 43b (53b) centering on the support shaft 43a (53a) and the carrier 12 (the hook 122) is maintained, the lock screws 73, 83, 75, 85 are loosened, and The fulcrum 43a, 53a is operated by a tool to rotate it by 180 degrees. As a result, the individual turning radii of the carrier 121 and the hook 122 are switched. After the switching, the locking screws 73, 83, 75, 85 are locked.

Further, the rotation stroke of the carrier 12 and the hook 122 is adjusted by the rotation angle adjustment mechanism 35. That is, the nut 38 of the rotation angle adjusting mechanism 35 is loosened, and the screw rod 37 is moved along the long hole 36a of the extending portion 36. Thereby, since the most advanced position, the retracted position, and the swivel stroke of the carrier 121 and the hook 122 are changed, the position of the screw lever 37 is fitted to an appropriate position, and the nut 38 is locked and fixed.

Thereby, the adjustment of each part caused by the change of the needle width is completed.

(effect of the implementation)

In the decorative stitching sewing machine 10 which is formed by the above-described configuration, since it has the first adjusting mechanism 70 which can adjust the distance from the rotating front end portion of the carrier 12 to the center of the rotation, and the adjustable rotation from the hook 122 Since the second adjustment mechanism 80 of the distance from the front end portion to the center of the rotation is moved, the carrier 12 and the hook 122 may not be exchanged when the adjustment of the needle width is changed. As a result, since it is not necessary to exchange the presser foot with the exchange of the carrier 12 and the hook 122, the complicated presser foot position adjustment work can be omitted.

Further, the support shafts 43a and 53a supported as the shafts of the carrier 12 and the hook 122 are respectively coupled to the eccentric shaft portions 74 and 84 that are eccentric with respect to the center of the rotation, and are coupled to the carrier 121 and the hook 122, respectively. Therefore, the rotational radius of the carrier 12 and the hook 122 can be adjusted by operating the rotating shafts 43a, 53a corresponding to the eccentric amount. Therefore, it is possible to easily perform the adjustment of the turning radius of the carrier and the hook accompanying the adjustment of the needle width.

Therefore, when the needle width of the sewing machine is changed, complicated work such as replacement of parts or position adjustment is not required, and needle width adjustment can be easily performed.

Further, since the upper decorative stitching sewing machine 10 is provided between the connecting rod 32 of the drive transmission mechanism 30 and the extending portion 36, the turning angle adjusting mechanism 35 that can adjust the connecting position along the radial direction is required, so that the needle width is required. When the rotation stroke of the carrier 12 and the hook 122 is changed by the change, the adjustment rotation angle can be changed only by the cooperation of the screw rod 37 and the nut 38, without the need to impart the power for shaking the rotation shaft 107. Exchange work to improve workability.

(other)

Although the upper decorative sewing machine 10 performs the change of the needle width by exchanging the needle holder 108, the method is not particularly limited. For example, the sewing needles 101 to 104 can be used to adjust the movement of the needles 101 to 104.

Further, although the carrier 121 and the hook 122 pass through the main shaft 106 to obtain the driving force of the spinning operation from the sewing machine motor, they may have independent common or individual driving sources.

Further, although either of the first and second adjustment mechanisms 70, 80 adjusts the rotational radius of the carrier 12 and the hook 122 by the eccentric shaft portions 74, 84, the length of the rotation radius can be adjusted as long as Yes, but not particularly limited to this method. For example, it is also possible to use a configuration in which the carrier 12 (the hook 122) is disposed so as to be slidably movable in the direction in which the fulcrum radius is displaced along the fulcrum 43a (53a), and has a fixing mechanism fixed at an arbitrary position. .

Further, the rotation angle adjusting mechanism 35 for adjusting the swinging rotation angle of the swinging rotary shaft 107 can be said to be the same. For example, in the turning angle adjusting mechanism 35, although the turning radius of the extending portion 36 is adjusted by the sliding operation of the screw lever 37, the present invention is not limited to this method, and the adjusting cam radius may be changed by the eccentric cam structure.

10. . . Decorative sewing sewing machine

20. . . Sewing machine frame

twenty one. . . Bed

twenty two. . . Longitudinal trunk

twenty three. . . Arm

30. . . Power transmission mechanism

31. . . Eccentric cam

32. . . Reciprocating rod

32a. . . Spherical bearing

33. . . Package shaft member

34. . . Cam slave

35. . . Rotation angle adjustment mechanism

36. . . Extension

36a. . . Long hole

37. . . Screw rod

38. . . Nut

40. . . First transmission

43. . . Lever shaft

43a. . . Support shaft

43b. . . Arm member

50. . . Second transmission mechanism

53. . . Lever shaft

53a. . . Support shaft

53b. . . Lever department

70. . . First adjustment mechanism

71. . . First plane

72. . . Second plane

73. . . Locking screw

74. . . Eccentric shaft

75. . . Locking screw

76. . . Slit

80. . . Second adjustment mechanism

81. . . First plane

82. . . Second plane

83. . . Locking screw

84. . . Eccentric shaft

85. . . Locking screw

86. . . Slit

100. . . Decorative sewing sewing machine

101. . . Sewing needle (left outer needle)

102. . . Sewing needle (left middle needle)

103. . . Sewing needle (right middle needle)

104. . . Sewing needle (right outer needle)

105. . . Needle bar

106. . . Spindle

107. . . Shake the rotating shaft

107a. . . Hook

108. . . Needle clip

109. . . Metal bearing

110. . . Pressing foot

111. . . Pressing bar

112. . . Pressure spring

121. . . Carrier

121a. . . Cylindrical part

121b. . . Claw

122. . . Pull hook

122a. . . Hook

130. . . Power transmission mechanism

131. . . Eccentric cam

132. . . Reciprocating rod

132a. . . Spherical bearing

133. . . Package shaft member

140. . . First transmission

141. . . Rotating arm

142. . . Transmission link

143. . . Lever shaft

143a. . . Support shaft

143b. . . Lever department

150. . . Second transmission mechanism

152. . . Transmission link

153. . . Lever shaft

153a. . . Support shaft

153b. . . Lever department

A. . . Cloth shipping direction

B. . . Sewing stitch

K. . . Decorative line

K1. . . Upstream part

K2. . . Downstream part

K3. . . Bending

L1. . . Rotation radius

L2. . . Rotation radius

[Fig. 1] A perspective view showing the overall configuration of a decorative stitching sewing machine on the embodiment of the invention.

[Fig. 2] A perspective view of the main configuration of the sewing machine frame.

[Fig. 3] A perspective view of the power transmission mechanism.

[Fig. 4] A perspective view of an important part of the power transmission mechanism.

[Fig. 5] A perspective view showing the carrier, the hook, and the transmission mechanisms.

[Fig. 6] A perspective view of a shaft portion of a lever shaft of the first (second) transmission mechanism.

[Fig. 7] An explanatory diagram of the adjustment operation by the first (second) adjustment mechanism, in which (A) shows a case where the rotation radius is short, and (B) shows a case where the rotation radius is long.

[Fig. 8] A plan view showing a sewing stitch of a conventionally decorated sewing machine.

[Fig. 9] A perspective view of a main configuration of a conventional sewing machine frame.

[Fig. 10] An enlarged perspective view showing the surrounding structure of a conventional presser foot.

[Fig. 11] A perspective view showing a conventional carrier, a hook, and a transmission mechanism.

[Fig. 12] An operation explanatory diagram showing the state in which the carrier and the hook are kept in the decorative line state.

[Fig. 13] An operation explanatory diagram showing the state in which the carrier and the hook are held in the decorative line state, and shows the most advanced state of the carrier.

[Fig. 14] An operation explanatory diagram showing the state in which the carrier and the hook are held in the decorative line state, and the final state of the carrier is displayed.

43a. . . Support shaft

43b. . . Arm member

53a. . . Support shaft

53b. . . Lever department

70. . . First adjustment mechanism

71. . . First plane

72. . . Second plane

73. . . Locking screw

74. . . Eccentric shaft

80. . . Second adjustment mechanism

81. . . First plane

82. . . Second plane

83. . . Locking screw

84. . . Eccentric shaft

121. . . Carrier

122. . . Pull hook

L1. . . Rotation radius

L2. . . Rotation radius

Claims (3)

An upper decorative sewing sewing machine, comprising: a plurality of sewing needles arranged in a row in a direction crossing the cloth conveying direction, and moving up and down; the carrier and the hook are held by the plurality of sewing needles The needle thread cooperates to form a decorative line of the decorative suture stitch, and is connected to the reciprocating movement of the sewing needle to shake the swirling person; the rotating rotating shaft is linked to the main shaft of the sewing machine, and the rotating shaft can be shaken around the vertical axis. a first transmission mechanism disposed between the rocking rotary shaft and the carrier, transmitting the rocking power of the rocking rotary shaft to the carrier; and the second transmission mechanism is disposed in the rocking The swinging rotary power of the rocking rotary shaft is transmitted to the puller between the moving shaft and the hook, and the upper decorative stitching sewing machine is characterized by: a first adjusting mechanism for adjusting the rotation center from the carrier to the front end a distance adjusting portion; and a second adjusting mechanism for adjusting a distance from a center of rotation of the hook to a front end portion, wherein the first adjusting mechanism has a first rotating shaft and Positioning a first eccentric shaft portion eccentric with respect to the first rotation axis and supporting the carrier, the second adjustment mechanism having a second rotation shaft and eccentricity disposed opposite to the second rotation shaft and supporting the hook The second eccentric shaft portion. The decorative stitch sewing machine according to claim 1, wherein the arm member and the both ends are coupled to the arm member by being fixed to the rocking rotary shaft and extending in a radial direction of the rocking rotary shaft a forward/backward member of the main shaft of the sewing machine to impart a swinging motion to the swinging rotary shaft; and a turning angle adjusting mechanism, wherein the turning angle adjusting mechanism is provided at a connecting portion between the arm member and the forward and backward member, and the same The joint position is moved and adjusted along the aforementioned radial direction. The decorative stitch sewing machine according to the second aspect of the invention, wherein the rotation angle adjusting mechanism has a long hole formed in the radial direction along the radial direction and is movably locked in a longitudinal direction of the long hole. The locking member.