JP3045242B2 - Scoop sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a scoop sewing machine, and particularly to a sewing needle formed by straight needles, which is easy to manufacture and which is suitable for the thickness of the cloth used. It is possible to adjust the depth of scooping and jump stitching, prevent skipping, keep sewing straight, equipped with thread trimming, and is economical in manufacturing. Regarding improvement.

[Prior Art] A scoop sewing machine using a curved needle is known (JP-B-39-28960, JP-B-43-26076, JP-B-45-20026, JP-B-45). No. -23980,
JP-B-45-37268, JP-A-58-105786, USP
3760747, 3986469, 4043284, 4416207).

This scooping sewing machine has a drive shaft, a needle reciprocally driven in an arc shape by the drive shaft, and a looper provided with a drive reversing at both ends of the ellipse in a slightly reciprocating elliptical motion in a relationship between the needle and the needle thread, A needle plate and a presser foot for sandwiching the cloth, a cloth lifting member for pushing up the cloth through an opening formed in the needle plate, and a cloth presser member for pressing the pushed up cloth, are provided. The needle portion is pierced in an arc shape into the cloth portion, and the needle thread is captured by the looper in cooperation with the looper, and the curved needle is entangled with the captured needle thread to perform the scooping by single thread ring sewing.

As shown in FIG. 15, in such a curved needle 301, the whole needle has an arc shape, and the gap between the needle tip 302 and the pointed tip of the cloth-raising member (not shown) is constant. The tip of the needle is formed eccentrically to the outer side of the arc 304 from the center line of the needle stem 303 so that the needle is sharpened toward this arc, so that there is an advantage that the needle is easily pierced into the cloth without resistance. .

However, on the other hand, production is extremely troublesome,
In addition, there is a disadvantage that the accuracy of the needle is apt to vary, and it is about five times as expensive as a straight needle of an ordinary household sewing machine. In addition, since the needle is a curved needle, the penetrating force is weak and unstable when the needle pierces the cloth, which deforms during scooping and stitches to cause stitch spots, lowering the quality of the sewn product, Needle replacement is frequent because the needle tip is easily damaged.It requires a high level of sewing skills, and it is difficult for a skilled person to perform sufficient scooping and stitching work. The drawback is that you have to pay attention.

In order to solve the above difficulties, the present applicant has proposed a scooping sewing machine and a scooping sewing method in which the needle is formed of a straight needle (an inexpensive sewing needle of an ordinary household sewing machine) and which is easy to manufacture (Japanese Patent Application No. 2002-214568). No. 63-231355). This scoop sewing machine
The needle is formed by straight needle, easy to manufacture, can produce beautiful high-quality sewing products without deformation during scooping and without scooping spots, without damaging the needle tip, advanced sewing skills Unnecessary
Even an inexperienced person can easily carry out scooping and stitching, and has the advantage that the needle management need only be paid to the same degree of care as a normal household sewing machine.

[Problems to be Solved by the Invention] By the way, in this scooping sewing machine, positioning at the time of insertion or at the start of sewing is easy, adjustment of scooping depth and jump stitching are possible, skipping is prevented, and sewing is straightened. A scoop sewing machine which is maintained, has thread trimming, has excellent sewing workability, and is economical in production has been desired.

[Object of the Invention] In view of the above demands, the present invention facilitates positioning at the time of insertion or at the start of sewing, enables adjustment of scooping depth and jump stitching, prevents skipping, and maintains sewing straight. The present invention is intended to provide a scoop sewing machine which is economical in production and has thread trimming.

[Means for Solving the Problems] In order to achieve such an object, according to the scooping sewing machine of the present invention, a drive shaft pivotally supported by a main body frame;
A needle and a looper respectively driven by a drive shaft, a needle plate and a presser for sandwiching the cloth, a cloth lifting member for pushing up the cloth through an opening formed in the needle plate, and a cloth holding member for pressing the pushed up cloth. In a scoop sewing machine that performs a scoop sewing by a single thread chain stitch in cooperation with the looper by piercing a needle into a pushed-up cloth portion with a stitch, forming a needle with a straight needle and pivoting a presser foot. And a cylinder body provided with a cloth lifting member is slidably mounted on the main body frame at a pivot portion so as to be slidable in parallel with the drive shaft, and the pivot portion is located closer to the drive shaft than an intermediate point between the drive shaft and the cylinder body. It is provided in.

ADVANTAGE OF THE INVENTION According to the scoop sewing machine of this invention, a pivoting part and a cylinder main body are connected with a connection member, and this connection member is provided with the index means which separates between a needle plate and a presser foot in a plurality of steps.

According to the scooping sewing machine of the present invention, the needles are formed by straight needles, and a cloth lifting shaft for rotating the cloth raising member is supported on the cylinder body having the cloth raising member, and the drive shaft and the cloth raising shaft are connected to each other. The first, which is connected at a reduction ratio of 2: 1 and provides a timing position where the cloth lifting member rotated by the cloth raising shaft is symmetrically arranged on the outer periphery and is pushed up until the straight needle pierces the cloth.
One of the first and second prongs is formed to be longer than the other by a predetermined amount in the circumferential direction, and the cloth-raising shaft is extended by a predetermined amount in the circumferential direction with respect to the drive shaft. A switching means is provided for switching the recording timing position to a jumping sewing position in which the other of the first and second protruding points makes the thrust amount smaller than that of the first and second protruding points.

According to the scooping sewing machine of the present invention, the drive shaft pivotally supported by the main body frame, the needle and the looper respectively driven by the drive shaft, the needle plate and the presser holding the cloth, and the needle plate are provided. A cloth lifting member for pushing up the cloth through the opening, a cloth holding member for holding the pushed up cloth, and a cloth holding spring for repelling the cloth holding member; In a scoop sewing machine that performs scoop sewing by single-thread chain stitching in cooperation with a sewing machine, a needle body is formed with a straight needle, and a cylinder body that pivots a presser foot and has a cloth lifting member swings in parallel with the drive shaft. A cylinder spring movably pivotally attached to the body frame at a pivoting portion, and a cylinder spring is provided for repelling the cylinder body in a direction in which the presser foot is pressed against the needle plate. Cloth presser that moves the lifting member back and forth in the thickness direction of the cloth A topper is provided, and the presser foot member is formed from left and right presser members, and is pushed up by the left presser member in the case of thin fabric sewing, and by the right presser member in the case of sewing thicker than medium-thick fabric, by the fabric lifting member. The cloth holding spring is repelled in a direction for holding the cloth portion.

ADVANTAGE OF THE INVENTION According to the scoop sewing machine of this invention, while forming a needle with a straight needle, guide the approach of a straight needle to the opening perforated in the needle plate, Is provided with a protection member for preventing the feed through of the straight needle due to penetration resistance.

According to the scooping sewing machine of the present invention, the drive shaft pivotally supported by the main body frame, the needle and the looper respectively driven by the drive shaft, the needle plate and the presser holding the cloth, and the needle plate are provided. A cloth lifting member that pushes up the cloth through the opening, a cloth presser member that presses the cloth that has been pushed up, and a feed dog that has an elliptical motion in the opening and feeds the cloth in the sewing direction, and the needle is pushed up to the cloth portion. In a scoop sewing machine that pierces and cooperates with the looper to perform scoop sewing by single thread chain stitching, a needle is formed by a straight needle, and a feed dog has a cloth hem in a body side in a spreading direction of the cloth. It protrudes toward the cloth as compared to the side.

According to the scooping sewing machine of the present invention, a needle for forming a needle with a straight needle and pulling out a sewing product in a direction opposite to a sewing direction at the end of sewing, thereby cutting a sewing thread captured by a looper with a scalpel of an opening cloth. It is provided on the body side.

ADVANTAGE OF THE INVENTION According to the scooping sewing machine of this invention, the drive shaft pivotally supported by the main body frame, the needle driven by the drive shaft and the sword tip which catches a sewing thread, and the needle which forms a loop on the sewing thread captured by the sword tip A looper having a small claw for threading a looped sewing thread, a needle plate and a presser foot for sandwiching the cloth, a cloth raising member for raising the cloth through an opening formed in the needle plate, and a cloth raised In a scoop sewing machine that includes a cloth presser member that presses a needle, the needle is pierced into the pushed-up cloth portion and cooperates with a looper to perform scoop sewing by single thread chain stitching. In the Japanese Patent Application Laid-Open No. H11-260, the small nail is formed of a soft material, the point of the sword is formed of a hard material, and is detachably attached to the small nail.

According to the scooping sewing machine of the present invention, the needle is formed with a straight needle, and at the time of performing at least the sewing while intersecting in the sewing direction in parallel with the spreading direction of the cloth between the drive shaft and the straight needle, the needle is formed with the straight needle. A drive mechanism for providing a linear reciprocating motion is provided, and the drive mechanism has a universal joint including a ball and a socket that wraps the ball through an O-ring.

Hereinafter, an embodiment of a scoop sewing machine according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the scoop sewing machine according to the present invention has an external appearance in which various mechanisms described below are mounted on a main body frame 1 fixed on a main body base 14, and a frame cover 12,
It is covered by a top cover 15, a needle plate cover 16, and a cylinder cover 17. Furthermore, handle 19, scoop adjustment dial 76
d, a feed adjusting dial 42, a thread tension knob 81, a presser lifting lever 75a, a pulley grip 24 'formed integrally with the pulley 24, etc. are attached so that they can be operated from the outer surface of the cover. 18 has a bobbin receiver 18
a, a thread standing bar 18b, and a thread guiding rod 18c are attached, and the main body base 14 is vibration-proofed by a vibration-proof rubber 14a.

The basic structure of the scoop sewing machine according to the present invention is as follows.
As shown in FIG. 3, FIG. 3, FIG. 4 and FIG. 5, the drive shaft 21 supported by the main body frame 1, the needle 3 and the looper 5 respectively driven by the drive shaft 21, and the cloth 9 ( FIG. 11,
12) which sandwiches the needle plate 6 and the presser foot 79, and a cloth lifting member 73 which pushes up the cloth 9 through the opening 62 formed in the needle plate 6.
And a cloth holding member 63a, 63b for holding the pushed-up cloth 9 and piercing the needle 3 into the pushed-up cloth portion to form a looper 5.
The needle 3 is formed by a straight needle in a scoop sewing machine that performs scoop sewing by single thread chain stitching in cooperation with the above.

As shown in FIG. 2, the drive shaft 21 of the scoop sewing machine
Is a motor pulley whose one end is connected to the motor 2.
22 is fixed to a drive shaft gear 29 driven by a small gear 24 "formed on the opposite side of a pulley grip 24 'of a pulley 24 rotated by a V-belt 23. The other end of the drive shaft 21 is The other end of the drive shaft 21 is connected to the straight needle 3 via a mechanism for causing the straight needle 3 to reciprocate linearly.
The looper 5 is connected to the looper 5 via a mechanism that gives a drive that is inverted at both ends of the ellipse.

As shown in FIG. 5, a cylinder 7 main body is provided inside the cylinder upper cover 17a and the cylinder lower cover 17b. One end of the cylinder body 7 has
A holding base 79b divided into pairs is attached. The presser foot 79b pivotally holds the presser foot 79, and is repelled by a presser spring 79a in a direction in which the cloth 9 is sandwiched between the needle plate 6 and the presser foot 79. Further, a cloth lifting member 73 that pushes up the cloth 9 through an opening 62 formed in the needle plate 6 is provided.

As shown in FIG. 4, under the needle plate cover 16, the needle plate 6 is mounted on the main body frame 1, and the cloth holding members 63a and 63b press the cloth portion 9 pushed up by the cloth raising member 73. And are provided.

As shown in FIG. 3, the scoop sewing machine according to the present invention includes a straight stitcher at least when sewing is performed between the drive shaft 21 and the needle 3 in the sewing direction in parallel with the spreading direction of the cloth 9. 3 is provided with a drive mechanism for giving a linear reciprocating motion. This drive mechanism is a needle drive cam fixed to the drive shaft 21
36, consisting of a needle drive rod 37 connected to this cam 36,
Thus, the rotational motion from the drive shaft 21 is converted into a reciprocating motion in the front-rear direction. The needle drive rod 37 is connected to a needle drive mechanism 38. The drive mechanism 38 is fixed to one end of the needle drive arm 35. By swinging this one end, the needle drive arm 35
Swing the whole. The other end of the needle drive arm 35 is pivotally connected to a needle drive link 34, and the link 34 is connected to a needle holder 33 composed of a needle holder 33a and a needle holder 33b, and the needle holder 33 is fixed to the needle plate 6. The needle pin 32 is slid to convert the oscillating motion into a linear reciprocating motion in the left-right direction, thereby giving the linear needle 3 removably fixed to the pin retaining member 33 a linear reciprocating motion.

The drive shaft 21 is connected to the looper 5 through a looper mechanism that gives the looper 5 a drive that is inverted at both ends of the ellipse (FIG. 4). That is, the drive shaft 21 is
The looper crank 54 has a looper crankpin base 54b fixed thereto. A looper joint 53 is rotatably connected to a looper crank pin 54a, and one end of a looper rod 52 is rotatably connected to the looper joint 53 by a looper joint pin 53a. The looper 5 is fixed to the other end of the looper rod 52. The looper rod 52 is connected to a looper drive mechanism 55 described later, and a ball (not shown) of the drive mechanism 55 is fixed to the looper 5.

A part of the looper crank 54 fixed to the drive shaft 21 includes:
A feed cam 46 is formed. One end of a feed rod 45 is pivotally attached to the feed cam 46, and the feed dog 4 is fixed to the other end. A feed adjusting link 43 is pivotally mounted on the fixed side of the feed dog 4. One end of a feed adjusting shaft 41 pivotally attached to the main body frame 1 is pivotally attached to a feed adjusting link 43, and a feed adjusting dial 42 is fixed to the other end. A feed adjustment shaft rotation stopper 44 is provided which is rotated by turning the feed adjustment dial 42 at the time of adjustment, and is fixed and does not rotate at the time of sewing.

In the scoop sewing machine according to the present invention, as shown in FIG.
The cylinder body 7 provided with 73 is pivotally attached to the body frame 1 at a pivoting portion 71 so as to be guided parallel to the drive shaft 21.
The pivot portion 71 is pivotally attached to the main body frame 1 directly below the drive shaft 21 on the opposite side of the pulley shaft 24 'of the pulley shaft 26 (FIG. 2), and is provided near an intermediate point between the drive shaft and the cylinder body. Closer to the drive shaft 21 than the
It is easy to swing up and down.

As shown in FIG. 5, the pivot portion 71 and the cylinder body 7 are connected by a connecting member 77.
Index means for separating the presser foot 79
75 are provided. As shown in FIG. 7, the indexing means 75 is fixed to the other of the presser lifting shaft 75b by raising and lowering a presser lifting lever 75a fixed to one of the presser raising shafts 75b with the pulley shaft 26 as a fulcrum. The presser-lifting cam 75c and the presser-lifting roller 75d that have been rotated are rotated, and are separated into substantially three stages of close contact, separation, and approach.

As shown in FIG. 5, a cloth raising shaft 72 for rotating the cloth raising member 73 is supported by the cylinder body 7 having the cloth raising member 73, and the other end of the cloth raising shaft 72 is connected to a cloth raising pulley 74c. The pulley 74c is fixed, and the drive shaft 21 and the cloth-raising shaft 72 are connected at a reduction ratio of 2: 1 to the pulley 29 'with the drive teeth of the timing belt 25 fixed to the drive shaft gear 29 by the timing belt 25. .

Further, as shown in FIG.
First and second positions symmetrically arranged on the outer circumference to provide timing positions for pushing up the cloth until the straight needle 3 pierces the cloth 9.
First and second prongs 73a, 73b
One 73a is formed longer by a predetermined amount in the circumferential direction than the other 73b,
The cloth raising shaft 72 is additionally rotated by a predetermined amount in the circumferential direction with respect to the drive shaft 21 by a half turn to set the timing position to the first and second protruding points 73.
A switching means 74 (FIG. 6) for switching to a jump stitching position in which the other one of the a and 73b reduces the amount of thrust is provided. As shown in FIG. 6, the switching means 74 is provided with a skip dial 74a at the end of the cloth raising shaft 72 inside the cloth raising pulley 74c, and a triangular hook 74e inside the cloth raising pulley 74c. Formed, corresponding to its hook 74e,
The skip dial 74a is provided with two triangular concave portions 74f at a timing position where the triangular concave portion 74f is additionally rotated half a predetermined amount in the circumferential direction. The concave portion 74f is configured such that the rotation transmitted to the cloth lifting pulley 74c is transmitted to the skip dial 74a in the driving direction, and the triangular hook 74e does not slide and transmit the triangular concave portion 74f in the opposite direction. ing. The skip dial 74a slides in the axial direction while the cloth raising shaft drive pin 74d fixed to the cloth raising shaft 72 is loosely fitted in the groove of the skip dial 74a and transmits the cloth raising shaft 72 in the rotation direction. 74a is repelled by a dial spring 74b fixed to the end of the cloth raising shaft 72 so as to press against the cloth raising pulley 74c, and by rotating the skip dial 74a a half turn, the cloth raising member 73 is fixed. By changing the timing position of the 72 with respect to the cloth pulley 74c, the normal sewing and the jumping sewing are selectively switched.

As shown in FIG. 5, a scooping depth adjusting section 76 for adjusting the scooping depth of the straight needle 3 with respect to the cloth 9 is provided so as to be connected to the cylinder body 7 having the cloth raising upper portion 73.

As shown in FIG. 8, the drive shaft 21
The scoop adjustment dial 7 is attached to one end of the
At the other end, a U-groove provided at the upper end of the scoop adjusting plate 76a is locked. A scoop adjusting washer 76e is pressed by a scoop adjusting pin 76c against the inclined scoop adjusting washer pressing portion 1a of the main body frame 1. Scoop adjustment dial 7
6d is rotated, and the scoop adjusting pin 76c fixed to the scoop adjusting shaft 76b is rotated to a position directly below the position directly above, so that the scoop adjusting pin 76c presses the scoop adjusting washer 76e while the main frame 1 The scooping adjustment shaft 76b slightly advances or retreats along the inclination of the scooping adjustment washer pressing portion 1a, and the scooping adjustment plate 76a locked on the scooping adjustment shaft 76b moves along with the movement of the scooping adjustment plate 76a. Fixed connecting member 7
7 slightly moves up and down, and finely adjusts the cloth lifting member 73 fixed to the cloth raising shaft 72 vertically.

As shown in FIG. 5, the cylinder body 7 pivotally attached to the presser foot 79 and provided with the cloth lifting member 73 is pivotally attached to the main body frame 1 at the pivoted portion 71 so as to be guided parallel to the drive shaft 21. A cylinder spring 70 is provided for repelling the cylinder body 7 in the direction in which the presser foot 79 is pressed against the needle plate 6. The cylinder spring 70 is adjusted so as to press the cloth lifting member 73 in the direction of the needle plate 6 with a pressure of 4 to 5 kg. A cloth holding stopper 68 for moving the cloth lifting member 73 forward and backward in the thickness direction of the cloth 9 against the cylinder spring 70 in accordance with the thickness of the cloth 9 has a base portion of an upper needle receiver 67 fixed to the needle plate 6. Are provided in parallel with the spread surface of the straight needle 3 and the cloth 9 (FIG. 10).

Further, as shown in FIG. 10, the presser foot member is formed of left and right presser foot members 63b and 63a. In the case of sewing thicker than thick fabric, the right-hand presser member 63a causes the presser spring 65 to repel the left and right presser members 63b and 63a in the direction in which the cloth 9 pushed up by the cloth lifting member 73 is held.

As shown in FIG. 11, an opening 62 formed in the needle plate 6 is provided.
In addition, there is provided a protective member 61a for guiding the entry of the straight needle 3 and preventing the cloth 9 pushed up by the cloth lifting member 73 from being entrained in the entry direction of the straight needle 3 due to penetration resistance. Is provided. The protection member 61a is provided on the side of the needle guide plate 61, which slightly projects from the opening 62 and is fixed to the needle plate 6 with a screw, on the side where the straight needle 3 enters. The end of the needle guide plate 61 is provided so as to slightly protrude toward the cloth lifting member 73 so as to be clamped.

As shown in FIG. 12 (a), the feed dog 4 which moves the cloth 9 in the sewing direction by performing an elliptical movement in the opening 62, as shown in FIG. The body side 4a protrudes toward the cloth 9 as compared with the hem-raising side 4b of the cloth 9, so that the cloth 9 is slightly pulled leftward as it advances.

As shown in FIG. 10, the scalpel 85 for cutting the sewing thread 8 (FIG. 1) captured by the looper 5 by pulling out the sewn material in the direction opposite to the sewing direction at the end of sewing causes the body It is provided on the side. The scalpel 85 is stored under the upper needle receiver 67, and a commercially available cutter knife blade is suitable.

As shown in FIG. 13, the blade 5 for catching the sewing thread 8
a, and a small claw that forms a loop in the sewing thread 8 captured by the sword tip 5a and ties the looped sewing thread to the needle 3
The looper 5 having 5b has a small claw 5b formed of an inexpensive soft material such as a superalloy, a tip 5a formed of a hard material such as steel, and is detachably attached to the small claw 5b with a screw. You.

As shown in FIGS. 14 (a) and 14 (b), the straight needle 3 is interposed between the drive shaft 21 and the straight needle 3 in the sewing direction in parallel with the spreading direction of the cloth 9 and at least in the sewing direction. A needle driving mechanism 38 for providing a linear reciprocating motion of the needle is provided. The universal joint, which is the driving mechanism 38, has a ball 38d
And a socket lid 38a that wraps the ball 38d through an O-ring 38e.

[Operation of the Invention] The operation of the scoop sewing machine according to the present invention thus configured will be described.

In the scoop sewing machine according to the present invention, the cylinder body 7 is swingably connected to the drive shaft 21 in parallel with the drive shaft 21 via the connection member 77, and the pulley shaft immediately below the drive shaft 21 is connected to the cylinder body 7. The separation of the cylinder body 7 provided at one end of the cylinder 26 and repelled in the direction of the needle plate 6 by the cylinder spring 70
Switching to a plurality of stages is possible by the index means 75.
Therefore, the gap between the needle plate 6 and the presser foot 79 when the cloth 9 is taken in and out, the approach between the needle plate 6 and the presser foot 79 when the cloth 9 is positioned, and the holding of the cloth 9 at the time of scooping ( Selection of each step of (contact) can be easily performed by operating the presser lifting lever 75a.

According to the scooping sewing machine according to the present invention, the drive shaft 21 and the cloth raising shaft 72 are connected at a reduction ratio of 2: 1 and the cloth raising member 73 fixed to the cloth raising shaft 72 is symmetrically arranged on the outer periphery. The first and second prongs 73a, 73b are provided, and one 73a of the first and second prongs 73a, 73b is formed to be longer than the other 73b by a predetermined amount in the circumferential direction. On the other hand, a switching means for switching the timing position to a jumping sewing position in which one of the first and second protruding tips 73a and 73b makes the pushing-up amount smaller than one of the first and second prongs 73a and 73b by rotating the cloth raising shaft 72 an extra half turn in the circumferential direction. 74 are provided. When ordinary sewing (continuous scooping sewing) is selected by rotating the skip dial 74a of the switching means 74, the xx line of FIG. The peak of the protruding point 73a and the peak of the point 73b push up the cloth 9, and scooping is continuously performed. When skip sewing is selected by rotating the skip dial 74a, the yy line in FIG. 9 acts on the protruding point of the cloth lifting member 73, and is formed to be longer by a predetermined amount in the circumferential direction for each rotation of the cloth raising member 73. The peak of the protruding tip 73a pushes up the cloth 9, and the protruding tip 73b at the half rotation does not push up the cloth 9 in a valley state, and alternate jumping and scooping is performed. xx
The angle α between the line and the yy line is preferably about 7 ° to 10 °.

According to the scooping sewing machine according to the present invention, the scooping depth adjusting section 76 is provided so as to be connected to the cylinder body 7 having the cloth lifting member 73, and as shown in FIG. By doing so, the scoop adjusting shaft 76b slightly advances or retreats, and accordingly the scoop adjusting plate 76a locked on the scoop adjusting shaft 76b moves, and the connecting member 77 fixed in the middle of the scoop adjusting plate 67a. Swings up and down slightly to finely adjust the cloth lifting member 73 fixed to the cloth raising shaft 72 up and down. This is suitable for selecting the depth of scooping so that when the thickness of the cloth 9 is small, the scooping lines are not conspicuous in the table.

According to the scoop sewing machine according to the present invention, a cylinder spring
A cloth holding stopper 68 for moving the cloth lifting member 73 in the thickness direction of the cloth 9 against the cloth raising member 73 is provided at the base of the upper needle receiver 67 fixed to the needle plate 6 with the spread surface of the straight needle 3 and the cloth 9. And are provided in parallel. As shown in FIG. 10, when the cloth 9 is pressed and lifted between the front ends of the cloth pressing members 63a and 63b and the upper end of the cloth lifting member 73, the right cloth pressing member 63a is moved to the cloth pressing spring 65.
If the cloth 9 is thicker than the medium-weight material, or if the cloth 9 is particularly thick at the cross seam portion, the compressed cloth thickness of the cloth 9 The cloth lifting member 73 is moved forward and backward in the thickness direction of the cloth 9 by
A constant scooping depth is maintained irrespective of the change in the cloth thickness, and a stable and beautiful seam can be created. According to the scoop sewing machine according to the present invention, the protection member 61a for preventing the cloth 9 pushed up by the cloth lifting member 73 from being entrained in the direction of entry of the straight needle 3 due to penetration resistance due to the needle is provided with the needle. The guide plate 61 is provided. As shown in FIG. 11, the straight needle 3 guided by the upper and lower needle receivers 67 and 66 at the position of a normal cloth.
Penetrates, but the protection member 61
If there is no a, it is fed to the position where it is pushed by the straight needle 3, and when the needle retreats, the cloth that has been fed back with the needle does not form a thread loop at the needle tip, and the looper blade tip catches the needle thread. It can cause skipping because it cannot be performed.

In the scooping sewing machine according to the present invention, the cloth lifting member 73 and the protective member 61a support the cloth (), and even when the cloth has poor needle passage, the accompanying movement of the straight needle 3 in the entering direction is prevented, and the cloth when the needle is retracted is moved by the needle. At the same time, the thread loop of the needle tip is formed without retreating, and the looper blade tip catches the needle thread and secure scooping is performed.

According to the scoop sewing machine according to the present invention, as shown in FIGS. 12 (a) and 12 (b), the feed dog is such that the body side 4a of the cloth 9 in the spreading direction of the cloth 9 is smaller than the hemming side 4b of the cloth 9. Cloth 9
The cloth 9 is slightly pulled to the left in the spreading direction by feeding more on the body side 4a than on the hem-raising side 4b by the amount protruding beyond the back of the needle plate. Sent while being sent. As a result, the edge of the folded back portion of the cloth 9 is constantly brought into contact with the cloth guide 63b 'of the left cloth pressing member 63b, and the straightness is extremely improved, so that the operation is easy and a stable sewing is obtained. Can be.

In the scoop sewing machine according to the present invention, as shown in FIG. 10, a scalpel 85 provided on the body side of the cloth in the opening 62.
Furthermore, at the end of sewing, the sewing material is pulled out in the direction opposite to the sewing direction, so that the sewing thread 8 can be easily cut.

According to the scoop sewing machine according to the present invention, as shown in FIG. 13, the looper 5 has a main body including a small claw 5b formed of an inexpensive soft material such as a superalloy, and only the blade 5a is made of steel. Since it is formed of such a hard material and is detachably attached to the small claw 5b with a screw, the cost is much lower than that of a conventional looper.

According to the scoop sewing machine according to the present invention, as shown in FIGS. 14 (a) and 14 (b), a needle driving mechanism 38 for providing the linear needle 3 with a linear reciprocating motion is provided.
The universal joint is a ball 38d, a socket 38c that wraps the ball 38d via an O-ring 38e,
It consists of a socket lid 38a. Socket 38c is needle drive rod 37
And the ball 38d is fixed to the needle driving arm 35. The reciprocating motion of the needle driving rod 37 in the front-rear direction is converted into a swinging motion of the entire needle driving arm 35 by the needle driving mechanism 38.
The other end of the needle drive arm 35 is pivotally connected to a needle drive link 34, and the link 34 is connected to a needle holder 33 including a needle holder 33a and a needle holder 33b, and the needle holder 33 is fixed to the needle plate 6. The needle pin 32 is slid to convert the swinging motion into a linear reciprocating motion in the left-right direction, thereby giving a linear reciprocating motion to the straight needle 3 detachably fixed to the pin retaining member 33.

The conventional drive mechanism, the universal ball joint, required high precision in manufacturing and was expensive.
It is manufactured at a much lower price by the combination of e and the ball 38d.

This combination of the O-ring and the ball is also suitably used for the drive mechanism 55 of the looper.

[Effects of the Invention] As is clear from the above description, according to the scooping sewing machine according to the present invention, by forming the needle with a straight needle,
Inexpensive sewing needles of ordinary household sewing machines that are easy to manufacture and have high precision quality of the manufactured needles can be used.

Further, according to the scooping sewing machine according to the present invention, the cylinder body is pivotally attached to the body frame in a pivotable manner in parallel with the drive shaft, and directly below the drive shaft, so that a gap between the needle plate and the presser foot is provided. Since the index means is provided in a plurality of stages, positioning at the time of insertion or at the start of sewing can be easily performed. Further, the cloth raising member is formed so that one of the first and second protruding points is formed to be longer than the other by a predetermined amount in the circumferential direction, and is provided with a switching means for switching to the jumping sewing position, thereby adjusting the scooping depth of the straight needle with respect to the cloth. Since the scooping depth adjusting section is provided, jumping sewing and scooping depth adjustment can be performed. Furthermore, a cloth presser stopper that moves the cloth lifting member in the thickness direction of the cloth against the cylinder spring in accordance with the thickness of the cloth, and the cloth is fed in the direction in which the straight needle enters due to penetration resistance. Protective members are provided to prevent skipping. Further, since the body of the feed dog protrudes toward the cloth as compared with the hem-raising side of the cloth, the sewing is maintained straight. A scalpel that cuts the sewing thread facilitates thread trimming. Further, the looper has a body including a small claw formed of a soft material, a sword tip formed of a hard material, detachably attached to the small claw, and a driving mechanism for giving a linear reciprocating motion to the straight needle. Since there is a universal joint consisting of a socket that wraps the ball through an O-ring, manufacturing costs are significantly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a scoop sewing machine according to the present invention, FIG. 2 is an explanatory view of a drive mechanism and a feed relation, FIG. 3 is an explanatory view of a needle relation, and FIG. And an explanatory diagram of a needle plate relationship,
FIG. 5 is an explanatory view of a cylinder, FIG. 6 is an explanatory view of a switching means, FIG. 7 is an explanatory view of an operation of a press-up shaft, FIG. 8 is an explanatory view of a scooping adjustment mechanism, and FIG. Explanatory drawing of the tenth
FIG. 11 is an explanatory view of a presser foot stopper and thread cutting, FIG. 11 is an explanatory view of a protective member, FIGS. 12 (a) and 12 (b) are explanatory views of a feed dog, FIG. 13 is an explanatory view of a looper, FIG. Figures (a) and (b)
Is an explanatory view of a needle driving mechanism, and FIG. 15 is a view showing a conventional curved needle. 1 ... body frame 1a ... scooping adjustment washer pressing part 12 ... frame cover 14 ... body base 14a ... vibration-proof rubber, 15 ... top cover 16 ... needle plate cover 17 ... cylinder cover 17a ... cylinder Upper cover 17b Cylinder lower cover 18 Thread stand 18a Thread spool 18b Thread stand 18c Thread guide rod 19 Handle 2 Motor 21 Drive shaft 22 Motor pulley 23 ... V-belt 24 ... Pulley 24 '... Pulley grip 24 "... Small gear 25 ... Timing belt 26 ... Pulley shaft 29 ... Drive shaft gear 29' ... Pulley with drive teeth for timing belt 3 ... Needle 32 Needle shaft 33 Needle member 33a Needle holder 33b Needle stay 34 Needle drive link 35 Needle drive arm 36 Needle drive cam 37 Needle drive rod 38 … Needle drive mechanism 38a… Socket lid 38c… Socket 38d… Ball 38e… O Group 4: Feed dog 4a ... Body side 4b ... Hem raised side 41 ... Feed adjustment shaft 42 ... Feed adjustment dial 43 ... Feed adjustment link 44 ... Feed adjustment shaft rotation stopper 45 ... Feed rod 46 ... … Feed cam 5 …… Looper 5a …… Sword tip 5b …… Small claws 52 …… Looper rod 53 …… Looper joint 53 …… Looper joint pin 54 …… Looper crank pin base 55b …… Looper crank pin base 55 …… Looper driving mechanism 55a Socket cover 55c Socket 55e O-ring 6 Needle plate 61 Needle guide plate 61a Protective member 62 Opening 63a Right fabric holding member 63b Left fabric holding member 63b ' … Fabric guide part 65… Fabric holder spring 66… Lower needle holder 67… Upper needle holder 68… Fabric holder stopper 7… Cylinder body 70… Cylinder spring 71… pivot part 72… Shaft 73: Cloth lifting member 73a: First protruding point 73b: Second protruding point 74: Switching means 74a … Skip dial 74b… Dial spring 74c… Cloth lifting pulley 74d… Cloth raising shaft drive pin 74e… Triangular hook 74f… Triangular recess 75… Indexing means 75a… Presser lifting lever 75b… … Lifter shaft 75c… lifter cam 75d… lifter roller 76… scooping depth adjustment part 76a… scooping adjustment plate 76b …… scooping adjustment shaft 76c …… scooping adjustment pin 76d …… scooping adjustment dial 76e… ... Scoop adjustment washer 77 ... Connecting member 79 ... Presser foot 79a ... Presser spring 79b ... Presser base 8 ... Thread 81 ... Thread tension knob 85 ... Female 9 ... Cloth 90 ... Poor needle passing cloth

Claims (10)

(57) [Claims] 1. A drive shaft rotatably supported by a body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth through an opening formed in the needle plate. A cloth lifting member for pushing up the cloth, and a cloth holding member for holding the cloth pushed up. The needle is pierced into the cloth part which has been pushed up, and the scoop sewing by single thread chain sewing is performed in cooperation with the looper. In a scooping sewing machine, the needle is formed by a straight needle, and a cylinder body pivotally attached to the presser foot and provided with the cloth lifting member is slidably slidably parallel to the drive shaft. A scooping sewing machine which is pivotally attached to a frame, and wherein the pivoting portion is provided near the drive shaft from an intermediate point between the drive shaft and the cylinder body. 2. The apparatus according to claim 1, wherein said pivoting portion and said cylinder body are connected by a connecting member, and said connecting member is provided with index means for separating said needle plate and said presser foot into a plurality of steps. Item 2. A scoop sewing machine according to Item 1. 3. A drive shaft rotatably supported by the body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth passed through an opening formed in the needle plate. A cloth lifting member for pushing up the cloth, and a cloth holding member for holding the cloth pushed up. The needle is pierced into the cloth part which has been pushed up, and the scoop sewing by single thread chain sewing is performed in cooperation with the looper. In the scooping sewing machine, the needle is formed by a straight needle, and a cloth-up shaft for rotating the cloth-up member is supported on a cylinder body having the cloth-up member, and the drive shaft and the cloth-up shaft are connected to each other. The cloth lifting member connected at a speed reduction ratio of 2: 1 and rotated by the cloth raising shaft is symmetrically disposed on the outer periphery and gives a timing position for lifting the cloth until the straight needle pierces the cloth. 1. The first and second protruding points, and the first One of the second prongs is formed to be longer by a predetermined amount in the circumferential direction than the other, and the cloth lifting shaft is further rotated by a predetermined amount in the circumferential direction with respect to the drive shaft, and the timing position is set to the first position. A scooping sewing machine provided with switching means for switching to a jumping sewing position in which the other of the second protruding points has a smaller amount of thrust than the one of the second protruding points. 4. A drive shaft rotatably supported by the main body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth through an opening formed in the needle plate. A cloth lifting member for pushing up the cloth, and a cloth holding member for holding the cloth pushed up. The needle is pierced into the cloth part which has been pushed up, and the scoop sewing by single thread chain sewing is performed in cooperation with the looper. In the scooping sewing machine, the needle is formed by a straight needle, and a scooping depth adjusting unit that is connected to a cylinder body having the cloth lifting member and that adjusts a scooping depth of the straight needle with respect to the cloth is provided. The scoop sewing machine according to any one of claims 1 to 3, characterized in that: 5. A drive shaft rotatably supported by a main body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth through an opening formed in the needle plate. A cloth lifting member, a cloth presser member for pressing the pushed up cloth, and a cloth presser spring for repelling the cloth presser member. In a scoop sewing machine that performs scoop sewing by single thread chain stitching in cooperation with the above, the cylinder body having the needle formed by straight needles, the presser foot pivotally attached, and the cloth lifting member is provided on the drive shaft. A cylinder spring pivotally attached to the body frame at a pivot portion so as to be swingable in parallel with the cylinder body, and repelling the cylinder body in a direction in which the presser foot is pressed against the needle plate; In response to the cylinder spring A cloth presser stopper for moving the lifting member forward and backward in the thickness direction of the cloth is provided, and the cloth presser member is formed of left and right cloth presser members. In the case of (1), the cloth presser spring is repelled by the right cloth presser in a direction of holding the cloth portion pushed up by the cloth raising member. 6. A drive shaft rotatably supported by the body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth through an opening formed in the needle plate. A cloth lifting member for pushing up the cloth, and a cloth holding member for holding the cloth pushed up. The needle is pierced into the cloth part which has been pushed up, and the scoop sewing by single thread chain sewing is performed in cooperation with the looper. In a scooping sewing machine, the needle is formed with a straight needle, and an opening formed in the needle plate is
A protection member is provided for guiding the entry of the straight needle, and preventing the cloth pushed up by the cloth lifting member from being entrained in the entry direction of the straight needle due to penetration resistance. A unique scoop sewing machine. 7. A drive shaft rotatably supported by the main body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth passed through an opening formed in the needle plate. A cloth raising member, a cloth pressing member that presses the cloth that has been raised, and a feed dog that moves the cloth elliptically in the opening and feeds the cloth in the sewing direction. In a scoop sewing machine that pierces and cooperates with the looper to perform scoop sewing by single thread chain stitching, the needle is formed by a straight needle, and the feed dog has a body side of the cloth in a direction in which the cloth spreads. A scoop sewing machine, wherein the sewing machine protrudes toward the cloth as compared with a raised side of the cloth. 8. A drive shaft rotatably supported by the body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding the cloth, and a cloth passed through an opening formed in the needle plate. A cloth lifting member for pushing up the cloth, and a cloth holding member for holding the cloth pushed up. The needle is pierced into the cloth part which has been pushed up, and the scoop sewing by single thread chain sewing is performed in cooperation with the looper. In the scoop sewing machine, the needle is formed with a straight needle, and at the end of sewing, a scalpel for cutting a sewing thread captured by the looper is pulled out in a direction opposite to a sewing direction at the end of the sewing, so that a scalpel for the cloth at the opening is provided. Scooping sewing machine characterized by being provided on the side. 9. A drive shaft pivotally supported by the body frame, a needle driven by the drive shaft and a sword tip for capturing a sewing thread, and a loop formed on the sewing thread captured by the sword tip to form a loop on the needle. A looper having small claws to knit the sewing thread, a needle plate and a presser foot for sandwiching the cloth,
A cloth lifting member that pushes up the cloth through an opening formed in the needle plate; and a cloth holding member that presses up the cloth that has been pushed up. The needle pierces the cloth part that has been pushed up and cooperates with the looper. In a scoop sewing machine that performs scoop stitching by single thread chain stitching by operation, the needle is formed by a straight needle, and the looper is formed by forming a small nail of a soft material, and a sword tip is formed of a hard material and is removable. A scoop sewing machine attached to the small claw. 10. A drive shaft pivotally supported by a main body frame, a needle and a looper respectively driven by the drive shaft, a needle plate and a presser holding a cloth, and an opening formed in the needle plate. A cloth lifting member that pushes up the cloth and a cloth holding member that presses the pushed up cloth are provided, and a needle is pierced into the pushed up cloth portion to perform scooping sewing by single thread chain sewing in cooperation with the looper. In the scoop sewing machine, the needle is formed by a straight needle, and the straight needle is interposed between the drive shaft and the straight needle in a sewing direction at least in a sewing direction in parallel with a spreading direction of the cloth. A scooping sewing machine comprising a drive mechanism for providing a linear reciprocating motion, the drive mechanism having a universal joint consisting of a ball and a socket for wrapping the ball through an O-ring.