JP2002346260A - Sewing machine cloth feeder - Google Patents

Abstract

(57) [Problem] To provide a cloth feeder which is compact and can move more accurately when moving in a sliding direction. SOLUTION: Right and left feed dogs (27, 28, 65, including a right feed dog and a left feed dog divided along the cloth feed direction) are provided.
66), a feed base (20) for movably supporting these left and right feed teeth in a direction intersecting with the cloth feed direction, and a vertical drive means (35) for applying a vertical movement to the left and right feed teeth.
Horizontal drive means (38) for imparting horizontal movement to the left and right feed dogs; and left and right drive means (51, 63, And a plurality of support shafts (29a, 29b, 67, 68) individually fixed to the left and right feed dogs and arranged along the sliding direction. A plurality of support holes (21c, 21d, 21m, 21n) formed at both ends in the slide direction of the feed table are provided to support the shafts so as to be individually movable along the slide direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth feeding device for a sewing machine, and more particularly, to a cloth feeding device for a sewing machine capable of imparting movement to a left and right feed dog in a direction intersecting a cloth feeding direction. It is.

[0002]

2. Description of the Related Art Conventionally, as a cloth feeder for a sewing machine of this kind, Japanese Patent Application Laid-Open No. 2000-2713 filed by the present applicant has been proposed.
No. 64 is known. FIG.
The apparatus shown in FIG. 1 has a flat U-shaped feed base 1, a right feed base 2 and a left feed base 3 mounted on the feed base 1, and one end fixed to the left and right feed bases 2, 3. At the same time, the gripping portions 6 and 7 whose other ends fix and hold the left and right feed teeth 4 and 5 individually.
And a shuttle 8 and the like arranged on the lower surface of the center notch of the feed base 1. The left and right feed teeth 4 and 5 have one ends fixed to the grips 6 and 7, and after assembly, the other ends are supported by the other grips 6 and 7.

The left and right feed tooth tables 2 and 3 have their worker-side tips 2a and 3a slidably supported by a feed tooth table guide groove 9, and support shafts 10 and 11 project from the opposite working side. Has been established. These support shafts 10, 11 are loosely fitted in support holes 1a formed in the cloth feed table. When a movement in the sliding direction Y intersecting with the cloth feeding direction is given to the left and right feed teeth tables 2 and 3 by the left and right driving means (not shown), the left and right feed teeth tables 2 and 3 are moved to the support holes 1a or the feed holes. It is guided by the abutment guide groove 9 and moves in the sliding direction Y.

[0004]

However, the conventional cloth feeder for a sewing machine is provided with two support shafts 1 for a left and right feed base.
0 and 11 are slidably supported in one support hole 1a. For this reason, the supporting length in the sliding direction cannot be sufficiently obtained, so that if the processing accuracy of the parts is loosened, there is a possibility that rattling occurs when the feed dog moves in the sliding direction. It is also conceivable to make the length of the support hole 1a longer in order to prevent the occurrence of the play.
Increasing the support hole length 1a inevitably increases the length (h) of the feed base 1 in the sliding direction, causing a problem that the feed base cannot be stored in a limited sewing machine bed space.

Further, the left and right feed teeth 4 and 5 have one end fixed to grips 6 and 7 and the other end supported by other grips 6 and 7. The cantilever structure of the left and right feed dogs 4, 5 is as follows.
If the load from the upper part is large, the rigidity may be insufficient. Then, when displacement due to the load occurs in the left and right feed dogs, there is a possibility that the straightness of the cloth may be impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has a length (h) of a feed base in a sliding direction.
It is a first object of the present invention to provide a cloth feeding device for a sewing machine which does not cause backlash when the left and right feed dogs are moved in the sliding direction without increasing the length of the cloth.

It is a second object of the present invention to provide a sewing machine cloth feed device capable of withstanding a large load on the left and right feed teeth from the upper surface due to a cloth presser or the like.

It is a third object of the present invention to provide a sewing machine cloth feeder capable of adjusting the amount of movement of the left and right feed dogs in the sliding direction and changing the state of movement.

It is a fourth object of the present invention to appropriately arrange a conventional linearly-moving feed dog that moves linearly in a four-way motion in addition to the feed dog that moves in the sliding direction to maintain the straightness of the cloth.

[0010]

In order to solve the above problems, the invention according to claim 1 is directed to a left and right feed dog (27, comprising a right feed dog and a left feed dog divided along the cloth feed direction).
28, 65, 66) and a feed base (20) for movably supporting these left and right feed teeth in a direction intersecting the cloth feeding direction.
Vertical drive means (35) for imparting vertical motion to the left and right feed dogs; horizontal drive means (38) for imparting horizontal motion to the left and right feed teeth; Left and right driving means (51, 63, actuator) capable of imparting a movement in a sliding direction intersecting with the cloth feeding device of the sewing machine. A plurality of disposed support shafts (29a, 29b, 67, 68);
A plurality of support holes (21c, 21d, 21m, 21n) formed at both ends in the slide direction of the feed table so as to individually support the support shafts in the slide direction.
And a configuration including:

According to a second aspect of the present invention, in the sewing machine cloth feeder according to the first aspect, the feed base is provided at a position separated from the support hole by a predetermined amount in the cloth feed direction. The structure is provided with engaging means (9, 26) that can guide the teeth in the sliding direction and regulate the teeth in the vertical direction.

According to a third aspect of the present invention, in the sewing machine cloth feeder according to the first or second aspect, the left and right feed teeth (2
7, 28, 65, 66) are individually left and right feed dogs (23,
24), the support shaft is fixed to the left and right feed dogs, and one of the left and right feed dogs is a cutout () for freely moving the support shaft fixed to the other feed dog. 23d, 24d).

According to the first, second, and third aspects of the present invention, it is possible to reduce the size of the apparatus without increasing the sliding direction length (h) of the cloth feed table, and to set the right and left feed teeth in the sliding direction. A cloth feeder for a sewing machine is provided, which prevents rattling during movement.

According to a fourth aspect of the present invention, in the sewing machine cloth feeder according to the second or third aspect, a square mounting hole (21) in which the left and right feed dogs are mounted is provided at a base of the feed base.
a) is formed and the left and right feed dogs (23, 2
4) is configured so that it can be locked to the side wall portions (21e, 21f) of the square mounting hole.

According to the fourth aspect of the present invention, since the side wall of the feed stage also serves as the stopper function of the left and right feed stages, the size of the cloth feeder can be further reduced.

The invention according to claim 5 is a method according to claim 1, 2, 3
In the sewing machine cloth feeder described above, the support shaft is a square pin (67, 68), and the support hole (21m, 21
n) has a square hole-like configuration that slidably supports the square pin.

According to the fifth aspect of the invention, the play of the feed dog in the sliding direction can be more reliably prevented.

According to a sixth aspect of the present invention, a left and right feed dog (27, 28, 65, 66) composed of a right feed dog and a left feed dog divided along the cloth feed direction, and these left and right feed dogs are attached to a cloth. A feed base (1, 20) movably supporting in a direction intersecting a feed direction, a vertical drive means (35) for imparting a vertical motion to the left and right feed dogs, and a horizontal motion to the left and right feed teeth. Cloth feeding device for sewing machine, comprising: a horizontal driving means (38) for applying a force; and left and right driving means (51, 63, an actuator) capable of applying a movement to the left and right feed dogs in a sliding direction crossing the cloth feeding direction. In the above, the tooth portions (27, 28) of the left and right feed dogs are configured such that both end sides thereof are fixed by grip portions (27b, 28b).

According to the sixth aspect of the present invention, since the left and right feed dogs have rigidity capable of resisting a load from the upper surface, the straightness of the cloth is maintained.

According to a seventh aspect of the present invention, in the sewing machine cloth feeder according to the seventh or eighth aspect, the gripping portion has reinforcing ribs (27ba, 28ba, U-shaped, T-shaped, etc.). ) Is formed.

According to the present invention, the rigidity of the left and right feed dogs is further improved.

According to an eighth aspect of the present invention, in the sewing machine cloth feeder according to the sixth or seventh aspect, the grip portions of the left and right feed teeth are arranged so as to overlap each other with a predetermined gap (j). Configuration.

According to the invention described in claim 8, since the grip portions do not wear, the life of the device is improved.

According to a ninth aspect of the present invention, a right and left feed dog (27, 28, 65, 66) composed of a right feed dog and a left feed dog divided along the cloth feed direction, and these left and right feed dogs are attached to a cloth. A feed base (20) movably supporting in a direction intersecting with the feed direction, a vertical drive means (35) for applying vertical motion to the left and right feed dogs, and applying a horizontal motion to the left and right feed teeth. Horizontal drive means (38), and left and right drive means (51, 63, actuator) capable of imparting movement to the left and right feed dogs in a slide direction intersecting the cloth feed direction. An upper and lower body (44) slidably supported in a vertical direction, and a left and right feed dog link having one end connected to the upper and lower body and the other end connected to the left and right feed dog. (45, 46) A plurality of connecting pins for connecting the right feed dog links and vertically, or horizontally feed dog (47,4
8, 49), wherein at least one of the connecting pins is an eccentric pin (70, 71, 72) and the eccentric pin is held at a predetermined position.

According to the ninth aspect of the present invention, by changing the holding position of the eccentric pin and holding it at a predetermined position,
The position of the left and right feed dogs can be finely adjusted. For this reason, more optimal movement in the sliding direction can be given in consideration of the balance between the left and right feed dogs.

According to a tenth aspect of the present invention, there is provided a left and right feed dog (27, 28, 65, 66) composed of a right feed dog and a left feed dog divided along the cloth feed direction, and A feed base (1, 20) movably supported in a direction intersecting with the feed direction, and a vertical drive means (35) for imparting vertical movement to the left and right feed dogs via the cloth feed base.
A horizontal drive means (38) for imparting a horizontal movement to the left and right feed dogs via the cloth feed table; and a movement in a slide direction intersecting the cloth feed direction for the left and right feed teeth. In the cloth feeding device for a sewing machine having left and right driving units (51, 63, actuators), the left and right driving units are provided with a vertical movement and slidably supported in the vertical direction. Upper and lower body (44)
Left and right feed dog links (45, 46), one end of which is connected to the upper and lower body and the other end of which is connected to the left and right feed dogs
Phase changing means (4) for changing the phase of the upper and lower bodies with respect to the vertical movement of the needle bar with respect to the vertical movement phase of the feed table.
0, 75, 76, 77, 78, 79, 63, 60);
The configuration was provided with.

According to the tenth aspect of the present invention, the phase changing means changes the phase of the upper and lower bodies with respect to the vertical movement of the feed base, so that the movement of the left and right feed dogs in the sliding direction at the time of cloth feeding can be reduced. It can be moved closer to the needle (pulling the cloth), separated from the needle (stretching the cloth), and eliminated the movement in the sliding direction (there is no stretching action on the cloth).
Therefore, by adjusting the phase changing means, it is possible to give an optimal movement according to the sewing conditions.

[0028] The invention according to claim 11 is the invention according to claims 9 and 10.
The cloth feeder for a sewing machine according to claim 1, wherein the feed base (1,
20) is provided with a four-feed motion by a vertical feed shaft and a horizontal feed shaft, and the left and right feed teeth (80, 81, 8).
4, 85), a straight feed tooth (82, 83, 86) is arranged along the cloth feed direction, and the straight feed tooth is fixed to the feed table.

According to the eleventh aspect of the present invention, when the straight feed teeth are provided outside the left and right feed teeth along the cloth feed direction, the straight running property is stabilized. Further, if the straight feed teeth are provided downstream of the left and right feed teeth, the straight feed teeth feed the cloth after sewing, so that the straightness of the cloth is stabilized.

According to a twelfth aspect of the present invention, there is provided a feeder (1, 20) for supporting a slide feed dog (88) movably in a direction intersecting the cloth feed direction, and the slide feeder via the feeder. Vertical drive means (35) for imparting vertical motion to the teeth, and horizontal drive means (38) for imparting horizontal motion to the slide feed teeth via the feed stand.
Left and right driving means (51, 63, actuator) capable of imparting a movement to the slide feed dog in one direction intersecting with the cloth feed direction; A linear feed dog (87) to which four feed motions are given by the feed shaft is arranged.

According to the twelfth aspect of the present invention, it is possible to perform sewing with straight running stability while the sewn material is moved in one of the left and right directions. In particular, when the cloth presser is provided with a guide (wall) for guiding the cloth along the sewing direction, the cloth edge automatically follows the guide, thereby improving the quality of the sewn product.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, based on FIGS.
A first embodiment of the present invention will be described. The feed base 20 has an inverted U-shape in side view, and includes a main body 21 extending on the upper surface thereof in the cloth feeding direction X, and an L-shaped arm 22 extending downward from the main body 21. ing. The main body 21 of the feed base has a square mounting hole 21a formed on the rear side (non-operator side), and a support hole extends through the mounting hole 21a in the Y direction orthogonal to the cloth feeding direction. 21c and 21d are formed in parallel (facing). A recess 21b is formed on the front side (operator side) of the main body 21 of the feed base. A support plate 25 is fixed above the recess 21b, and a slide rail (engaging means) 26 is formed by the support plate 25 and the recess 21b.

The feed dog is composed of a right feed dog 27 and a left feed dog 28 which are divided into two parts along the cloth feed direction. The right feed dog 27 includes a tooth portion 27a and a right grip portion 27b having a U-shape in a plan view for fixing and holding both ends of the tooth portion 27a. The right grip 27b is placed on the upper flat surface of the right feed dog stand 23, and is fixed by screws (not shown).
The right feed tooth base 23, whose long side is arranged along the cloth feed direction X, includes a front (operator side) slide portion 23a and a rear support portion 23b. Support part 23b
Is formed with a fitting hole 23c along the sliding direction Y (a direction perpendicular to the cloth feeding direction), and a notch (notch portion) 23d is provided near the fitting hole 23c. Is formed. Further, on the lower surface of the support portion 23b, two projecting connection portions 23e, 23e are provided along the Y direction.

Similarly, the left feed dog 28 is composed of a tooth portion 28a and a left grip portion 28b, a fitting hole 24c formed in the left grip portion, and a notch hole (notch portion) 24d. It is fixed to the tooth base 24.

The left and right feed dogs 23 and 24 set in the mounting holes 21a of the feed base 20 are supported by the support holes 21 on the side of the feed base.
A right support shaft 29a and a left support shaft 29b are inserted through c and 21d, respectively. The inserted right support shaft 29a and left support shaft 29b are respectively fitted into the fitting holes 23 of the left and right feed dogs.
c and 24c, and is fixed at a predetermined position by a screw (not shown).

The right support shaft 29a is in the support hole 21c formed along the sliding direction Y, and the left support shaft 29b is in the support hole 2c.
Both ends are slidably supported by 1d. A cutout hole (a cutout portion) 24d is formed in the left feed tooth base 24 corresponding to the portion where the right support shaft 29a is inserted. Notch holes (notch portions) 23 are formed in the right feed dog stand 23 in correspondence with portions where the left support shaft 30 is inserted.
d is formed.

As is well known, the lower surface of the sewing machine bed has a Y
A vertical feed shaft 30 and a horizontal feed shaft 31 are arranged along the direction. A vertical feed cam 3 is provided at the end of the vertical feed shaft 30.
2 is fixed. Projection 32a of vertical feed cam 32
Is connected to one end of the vertical feed link 33, and the other end of the vertical feed link 33 is connected to the arm 22 of the feed base via a shaft 34.
b. The sewing machine is driven to move the vertical feed shaft 30
Rotates, the vertical feed cam 32, the vertical feed link 3
3. Feed shaft 20 and left and right feed teeth 27, 2 via shaft 34
8 moves up and down. The vertical feed shaft 30, the vertical feed cam 32, the vertical feed link 33, and the shaft 34 are vertically driven means 35.
Is configured.

The horizontal feed shaft 31 reciprocates and swings in conjunction with the driving of the sewing machine by a well-known horizontal feed mechanism (not shown). The left end of the horizontal feed shaft 31 is fixed to the lower end of the horizontal feed arm 36. The upper end of the horizontal feed arm 36 is rotatably connected to the rear end of the feed base 1 via a shaft 37. When the sewing machine is driven and the horizontal feed shaft 31 swings back and forth, the horizontal feed arm 3
6, feed shaft 20 and left and right feed teeth 27, 2 via shaft 37;
8 reciprocates in the horizontal direction X (cloth feeding direction). The horizontal feed shaft 31, the horizontal feed arm 36, and the shaft 37 constitute horizontal drive means 38.

An eccentric cam 40 is fixed to the vertical feed shaft 30. The eccentric cam 40 is connected to the left / right feed link 41. The free end side of the left and right feed link 41 is connected to an interlocking arm 42a of an interlocking body 42 by a shaft 41a. The U-shaped interlocking member 42 is rotatably supported by the horizontal feed shaft 31. One of the protrusions is an interlocking arm 42a and the other is a bearing 42b. The bearing portion 42 is formed by screws (not shown).
b fixes one end of the shaft 43. The other end of the shaft 43
It is loosely fitted in the long hole 44c of the upper and lower body formed along the X direction.

The upper / lower body 44 has a box-shaped main body 44a, a horn-shaped projection 44b formed on the right side of the main body, and a pair of parallel protruding upper parts of the main body. Arc-shaped protrusions 44d and 44e, a through groove 44f formed along the sliding direction Y, and a long hole 44 formed along the sliding direction Y and having a longer axis aligned with the cloth feeding direction X.
c.

One end of the left and right feed dog links 44 and 45 disposed between the pair of arc-shaped projections 44d and 44e is rotatably supported by a shaft 47 supported by the arc-shaped projection. The other end of the right feed dog link 45 is disposed between the pair of connecting portions 23e of the right feed dog, and is rotatably connected to the right feed dog 23 by pins 48.
The other end of the left feed dog link 46 is disposed between the pair of connecting portions 24e, 24e of the left feed dog, and is rotatably connected to the left feed dog 24 by pins 49.

The angular projection 44b of the upper and lower body 44 is
2 is loosely fitted in a vertical groove 22a formed in the lower part of the second member 2 and is supported movably in the vertical direction. Also, the L-shaped guide member 50 has a bent one end side having a through groove 44 of an upper and lower body.
f, and the other end is fixed to the side surface of the arm 22 by a screw (not shown). As described above, the upper and lower bodies 44 are provided with the vertical grooves 2.
2a and the guide member 50 movably support up and down directions. The sewing machine is driven and the vertical feed shaft 3
When 0 rotates, the upper / lower body 44 reciprocates in the vertical direction via the left / right feed link 41, the interlocking body 42, and the shaft 43. The reciprocating motion of the upper and lower bodies 44 includes the left and right feed dog links 45 and 4.
6, a movement in the sliding direction Y orthogonal to the cloth feeding direction is given to the left and right feed dog stands 23 and 24. The upper and lower feed shaft 30, the interlocking body 42, the shaft 43, the upper and lower bodies 44, the left and right feed dog links 45 and 46, etc., constitute the left and right driving means 51.

The left and right feed teeth 27 and 28 are supported by the feed table 20 so as to be slidable in the sliding direction, and are connected to upper and lower bodies 44 constituting left and right driving means. The difference (relative amount) between the vertical motion vector (the former) of the upper and lower body 44 given by the left / right driving means 51 and the vertical motion vector (the latter) of the feed table 20 given by the vertical driving means 35 is obtained. , And give a movement in the sliding direction to the left and right feed dogs. When the difference between the former and latter motion vectors is zero, the movement of the left and right feed dogs in the sliding direction is zero. In addition, when ascending, if (momentum of feed bar 20)> (momentum of upper and lower body 44), the movement of the left and right feed dogs in the sliding direction is the direction approaching the needle (the action of shrinking the cloth or moving the cloth). Out. Also, when ascending, (momentum of the feed bar 20) <
In the case of (the amount of movement of the upper and lower bodies 44), the movement of the left and right feed dogs in the sliding direction is the direction in which the left and right feed dogs are separated from the needle (the action of stretching the cloth).

As shown in FIG. 2, the left and right feed dogs 23, 24 after assembly are set in the mounting holes 21a, and the left and right support shafts 29a, 29b fixed to each feed dog are moved along the sliding direction Y. , Are slidably supported by the feed base support holes 21c and 21d. In addition, the slide portion 23 of each feed dog
The slide rails a and 24a are slidably supported in a slide direction Y by slide rails (engaging means) 26. When the left and right feed tooth blocks are moved by the left and right driving means 51 in a direction in which the right and left feed tooth blocks are separated from each other, the right feed tooth base side wall 23f and the left feed tooth base side wall 24f are respectively attached to the mounting hole side wall 21e of the cloth feed table. , 21f. The mounting hole side walls 21e and 21f have a stopper function for locking the left and right feed dog stands 23 and 24.

As shown in FIGS. 2 to 6, the tooth portions of the left and right feed teeth 27 and 28 have respective gripping portions 27b at both ends.
28b. For this reason, it has the rigidity which can resist the load from an upper surface. Therefore, when the cloth is fed, even if a large load is applied to the feed dog from the upper surface, the feed dog does not tilt, and the straightness of the cloth is maintained. And, when the device is assembled,
The gripping portions 27b and 28b of the left and right feed dogs are arranged (laminated) so as to overlap with a certain gap J. Further, the reinforcing rib 27 is provided on the left end side from the grip portion 27b.
ba, a reinforcing rib 28ba on the right end side from the grip portion 28b.
Are protruding respectively. For this reason, the side surface shape of the grip portion is L-shaped or inverted L-shaped.

As described above, since the grip portions 27b and 28b do not wear, the life of the device is improved,
Further, since the reinforcing ribs are provided, the rigidity can be increased without taking more space.

The operation of the first embodiment will be described. First, when the sewing machine is driven and the vertical feed shaft 30 rotates,
The vertical feed cam 32 imparts vertical movement to the feed base 20 via the vertical feed link 33. Further, the horizontal feed shaft 31 is rotated (oscillated) by a horizontal feed drive mechanism (not shown), and a horizontal motion is given to the feed table 20 via the horizontal feed arm 36 by the rotation of the horizontal feed shaft 31.
Due to the vertical movement and the horizontal movement of the feed base 20, the left and right feed teeth 27 and 28 perform the same four-feed movement as in the related art.

In this embodiment, the vertical feed shaft 30
The rotation of the eccentric cam 40 rotates. As a result, the shaft 43 swings about the horizontal feed shaft 31 via the left and right feed link 41 and the interlocking body 42. Then, only the vertical movement of the shaft 43 is transmitted as the movement of the shaft 43 by the elongated hole 44c of the upper and lower body 44, thereby moving the upper and lower body 44 up and down. At this time, since the upper and lower bodies 44 are movably supported only in the vertical direction by the vertical grooves 22a and the guide members 50, they reciprocate smoothly in the vertical direction.

When the amount of elevation of the upper and lower bodies 44 is greater than the amount of elevation of the feed base 20, the shaft 47, the left and right feed dog links 45,
46 Left and right feed dogs 2 via the left and right feed dog stands 23 and 24
7, 28 each move away from the needle and act to stretch the fabric. Then, the left and right feed dogs 23, 24
Are supported slidably in support holes 21c and 21d formed in the feed table. In addition, slide portions 23a and 24a of the left and right feed tooth bases.
Are slidably supported in the guide groove 26. For this reason, the left and right feed dogs 23 and 24 smoothly slide in the Y direction.
To move along.

When the lowering amount of the upper and lower bodies 44 is larger than the lowering amount of the feed base 20, the shaft 47, the left and right feed dog links 45,
46 Left and right feed dogs 2 via the left and right feed dog stands 23 and 24
7, 28 move so as to approach the needle, respectively, and approach along the sliding direction.

The movement of the left and right feed teeth 27 and 28 in the sliding direction substantially occurs when the needle tip comes out of the cloth (the left and right feed teeth 27 and 28).
28), the movement in the direction away from the needle starts, and when the needle pierces the cloth (when the cloth feed by the left and right feed teeth 27, 28 ends), the movement in the direction approaching the needle starts. Exercise is set to begin. This is because the eccentric cam 40 with respect to the vertical shaft feed shaft 30
Is set according to the mounting angle. And at the time of cloth feeding,
The movement of the left and right feed teeth 27 and 28 in the sliding direction Y is a composite movement of the vertical movement and the horizontal movement of the left and right feed teeth 27 and 28, and the cloth receives the acting force in the direction away from the needle left and right, While being stretched in the horizontal direction, it is fed to the front side in the cloth feeding direction X. For this reason, if the cloth feeding device of the first embodiment is used for a staggered sewing machine, an upper stitch sewing machine, or the like in which sewing wrinkles are likely to occur (called puckering), puckering hardly occurs.

According to the first embodiment, the left and right feed dogs 27,
28, a plurality of support shafts 29a, 29b arranged along the sliding direction, and the feed shafts 29a, 29b for supporting the support shafts 29a, 29b individually and movably along the slide direction Y. Since the support holes 21c and 21d are formed at both ends in the slide direction of the table 20, the length (h) of the cloth feed table in the slide direction can be reduced, that is, the cloth feed apparatus can be downsized. At the same time, when the left and right feed dogs move in the sliding direction, play is prevented, and puckering is reliably prevented.

Further, support holes 21c, 21d are provided in the feed table.
In contrast, a slide rail (engaging means) 26 capable of guiding the left and right feed teeth 27 and 28 in the slide direction Y and restricting the vertical feed direction is provided at a position separated by a predetermined amount in the cloth feed direction X. Therefore, the cloth feeder can be reduced in size, and at the time of moving the left and right feed dogs in the sliding direction, play is prevented and puckering is reliably prevented.

Further, one of the left and right feed dogs has cutouts 23d and 24d for freely moving the support shaft fixed to the other feed dog, so that the support shaft is separated from the feed dog. Since the support shaft is not disposed, the support shaft does not interfere with the shuttle of the sewing machine or the shuttle shaft, and the size of the cloth feeder can be reduced.

At the base of the feed base, there is formed a square mounting hole 21a in which the left and right feed teeth are mounted, and the left and right feed teeth (23, 24) are formed on the side walls of the square mounting hole. Since the structure can be locked to the portions 21e and 21f, the side wall portion of the feed base 1 also serves as the stopper function of the left and right feed tooth bases, so that the cloth feeder can be further downsized.

The teeth 27, 28 of the left and right feed teeth are fixed at both ends by gripping portions 27b, 28b, so that the left and right feed teeth resist the load from the upper surface. The rigidity of the cloth allows the cloth to move straight.

Further, the grip portions of the left and right feed dogs or the grip portions having ribs are arranged so as to overlap with a predetermined gap (j).
Since the grip portions do not wear, the life of the device is improved.

Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in the left and right driving means. The other same components are denoted by the same reference numerals, and description thereof will be omitted.

The left and right driving means 63 are fixed to a motor 61 fixed to the sewing machine frame, a swing plate 62 fixed to the output shaft of the motor 61, and one end separated from the center of rotation of the swing plate 62. And a shaft 43 whose other end is loosely fitted in the elongated hole 44c of the upper and lower body 44.

When the motor 61 rotates, the swing plate 61 and the shaft 43 swing, and the upper and lower bodies 44 move in the vertical direction. As described in the first embodiment, the right and left feed dog links 45 and 46 are opened and closed by the vertical movement of the vertical body 44 and the vertical movement of the feed base 20, and the left and right feed teeth 27 and 28 are moved in the Y direction. Move closer and farther away.

A controller (control means) 60 for controlling the rotation of the motor 61 is connected to the motor 61. The control means 60 has a CPU, ROM, RA
A needle position signal for detecting the vertical position of the sewing needle and an input setting means that can be arbitrarily set by a worker using a key switch are connected to the CPU input side. After these input signals and data are calculated by the CPU, a drive signal is output to the motor 61 via a driver circuit. With this drive signal, the left and right feed dogs 27 and 28 can be moved toward and away from or separated from each other in the Y direction.

Then, at the time of cloth feeding, the motor 61 is rotated clockwise from the initial position by a predetermined amount (so that the raising amount of the upper and lower bodies 44 is larger than the raising amount of the feed base 20) by the needle position signal, and The teeth 27, 28 are separated in the Y direction. Thereafter, the motor 61 is rotated counterclockwise from the end of the cloth feeding to return to the initial position, thereby bringing the left and right feed teeth 27 and 28 closer to the Y direction and returning to the initial position. By moving the left and right feed teeth 27 and 28 in the sliding direction, stitches without puckering are formed.

Conversely to the above control, at the time of cloth feeding, the motor 61 is rotated clockwise from the initial position by a predetermined amount (so that the rising amount of the upper and lower bodies 44 is smaller than the rising amount of the feed base 20), The left and right feed dogs 27 and 28 are made to approach in the Y direction (cloth is moved). Thereafter, it is also possible to control the motor 61 to rotate counterclockwise from the end of the cloth feeding to return to the initial position. With this control, the cloth is sewn while being moved inward, so that there is an effect of preventing puncturing (preventing the seams of the cloths from shifting when joint sewing is performed).

Also, at the time of cloth feeding, the feed base 20 and the upper and lower
It is also possible to set the amount of rise and the speed so that the feed dog does not move in the sliding direction.

As described above, the left and right driving means 63 including the motor 61 and the like and the controller (control means) 60 for controlling the motor 61 constitute a phase changing means. By this phase changing means, the phase of the upper and lower bodies 44 is changed with respect to the vertical movement of the feed base 20, and the movement of the left and right feed teeth in the sliding direction at the time of feeding the cloth is brought closer to the needle, and the cloth is moved from the needle. The separated cloth can be stretched or lost. Therefore, by adjusting the phase changing means, an optimal movement in the sliding direction can be given in accordance with the sewing conditions.

Next, a third embodiment of the present invention will be described with reference to FIG.
An embodiment will be described. The third embodiment differs from the first embodiment in the support structure for the left and right feed dogs and the like. The other same components are denoted by the same reference numerals, and description thereof will be omitted. The left and right feed dogs are composed of a right feed dog 65 and a left feed dog 66 divided into two along the cloth feed direction.

The right feed dog 65 is composed of a tooth portion 65a and a right grip portion 65b shaped like a plane L for fixing and holding one end of the tooth portion. The right end 65b is placed on the upper flat surface of the right feed dog stand 23, and is fixed by screws (not shown). Similarly, the left feed dog 66 includes a tooth 66 a and a left grip 6.
6b, and the left grip 66b is provided with the left feed tooth base 24.
Is mounted on the upper flat surface and fixed by screws (not shown).

The left and right feed dogs 65 mounted on the feed base 20,
66 is connected to the upper and lower bodies 44, the upper and lower shafts 30 and the like via left and right feed dog links 45 and 46. Then, the lower surface 65aa of the other tooth side of the right feed dog is supported by the grip portion 66bb of the left feed dog. Also, the lower surface 66aa of the other tooth side of the left feed dog
Are supported by the gripping portion 65bb of the right feed dog. That is,
The free end side of the left feed dog is supported by the grip portion of the right feed dog, and the free end side of the right feed dog is supported by the grip portion of the left feed dog. The feed teeth are mutually supported.

In the third embodiment, similarly to the first embodiment, the size of the cloth feeder can be reduced, and at the time of moving the left and right feed teeth in the sliding direction, play is prevented.
And puckering is reliably prevented.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is different from the first embodiment in the shapes of the support shaft and the support hole for guiding the left and right feed tooth blocks in the sliding direction. The other same components are denoted by the same reference numerals, and description thereof will be omitted.

Square pins 67 and 68 are individually fixed to the left and right feed dog stands 23 and 24 along the sliding direction. Then, on the side surface of the feed base 20, there are formed two-way square holes 21m and 21n penetrating along the sliding direction. The square holes 21m and 21n are provided with the square pins 67 and 68, respectively.
Are individually slidably supported. According to the fourth embodiment,
The occurrence of play is more reliably prevented.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. The fifth embodiment is different from the first embodiment in that the upper and lower bodies 44 and the left and right feed dog links 45, 4 are provided.
6 in that an eccentric pin is used as a connecting pin that connects one end of the left and right feed teeth links 45 and 46 and a connecting pin that connects the other end of the left and right feed dog links 23 and 24 to the left and right feed dog stands 23 and 24. Further, the structure of the vertical feed shaft 30 and the eccentric cam 40 fixed thereto will be described in more detail. The same components are denoted by the same reference numerals, and description thereof will be omitted.

First, the eccentric pin will be described. FIG.
The eccentric pin support holes 44da, 44d are formed on the arc-shaped projections 44d, 44e of the upper and lower body 44 along an axis parallel to the X direction.
44ea are formed. The eccentric pin 70 includes a concentric front support portion 70b, a rear support portion 70a, and an eccentric portion 70c eccentric to both support portions between both support portions. The support portions 70a and 70b are rotatably supported by support holes 44da and 44ea of the upper and lower bodies, respectively, and both ends of the left and right feed dog links are mounted on the eccentric portion 70c. When the eccentric pin 70 is rotated, the right and left feed teeth 27 and 28 move in the sliding direction via the left and right feed dog links 45 and 46, and the balance can be adjusted. After this adjustment, the eccentric pin 70 is fixed at a predetermined position by screws or nuts (not shown).

The left and right eccentric pins 71 and 72 have the same configuration as the eccentric pin 70 described above. The right eccentric pin 71
The two supporting portions 71a and 71b are connected to the connecting portion 23 of the right feed dog.
e, and the left eccentric pin 72 is also rotatably supported by the connecting portion 24e of the left feed dog. The right eccentric pin 71 adjusts the initial position in the sliding direction of the right feed dog 27 via the right feed dog stand 23 by its rotation. Then, it is fixed at a predetermined position by screws or nuts not shown. Similarly, the left eccentric pin 72 is connected to the connecting portion 2 of the left feed dog.
4e rotatably supported, and sets an initial position of the left feed dog in the sliding direction.

In the fifth embodiment, three eccentric pins 70,
The relative position of the left and right feed dogs is adjusted using 71 and 72, but it is also easy to change the relative position of the left and right feed dogs using at least one eccentric pin to give optimal sliding direction motion. Can be considered. Further, although the two links are connected in a V-shape with the upper and lower body 44 left and right feed tooth blocks of this embodiment, four eccentric pins may be easily used instead of the parallel connection.

Next, the coupling structure between the vertical feed shaft and the eccentric cam will be described. The eccentric cam 75 of FIG. 14 describes the eccentric cam portion 40 of FIG. 12 in detail, and includes a cylindrical main body 75a and a cam portion 75b formed on the outer periphery of the main body. The outer circumference 75b of the eccentric cam 75 fits into the connection hole 41b of the left and right feed link 41. After passing through the vertical feed shaft 30, the cylindrical main body 75 a is rotatably supported by the vertical feed shaft 30. Then, the operator fixes the eccentric cam 75 at a predetermined position with the screw 76.

As described above, the movement of the left and right feed dogs in the sliding direction is a relative movement caused by the relationship between the vertical movement of the vertical body 44 and the vertical movement of the feed base 20. When the fixed position is changed by rotating the eccentric cam 75, the vertical movement phase of the upper and lower bodies 88 changes with respect to the feed base 20 that moves up and down at a constant cycle by the vertical feed shaft 30. Therefore, the left and right feed dogs 2
3, 24 movement in the sliding direction changes.

For example, in the present invention, when the eccentric amount and phase of the eccentric cam 75 are fixed so that the vertical amount and the phase of the pin 43 coincide with the vertical amount of the feed base 20, the left and right feed teeth 23 and 24 are fixed. No movement in the sliding direction occurs. From this state, when the eccentric cam 75 is rotated and fixed approximately 45 degrees in the counterclockwise direction, the left and right feed teeth move in a direction away from the needle during cloth feeding, and attempt to stretch the cloth. Further, when the eccentric cam 75 is rotated and fixed approximately 45 degrees clockwise, the left and right feed teeth move in the direction approaching the needle during cloth feeding,
Try to move the cloth inward. Thus, the eccentric cam 75
The screw 76 and the screw 76 constitute a phase changing unit that changes the phase of the upper and lower bodies 44 with respect to the vertical movement phase of the feed base 20.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. The sixth embodiment is a fifth embodiment.
The structure of the eccentric cam differs from that of the embodiment.

The vertical feed shaft 30 shown in FIG. 15 has an adjustment table 77 having a rectangular shape as viewed from the front and having a long side disposed in the horizontal direction.
Has been fixed. The adjuster 78 has a cylindrical shape,
The axis 0 and the axis of the adjuster 78 are arranged in parallel. The adjuster 78 has a groove 78a formed along the horizontal direction at a position shifted from the center of the diameter by a predetermined amount. The outer shape 78 c of the adjuster 78 fits into the connection hole 41 b of the left and right feed link 41.

An elongated groove 78b penetrating therethrough is formed in the groove 78a of the controller. Also, this adjusting groove 78a
Are formed slightly wider in the vertical direction than the adjustment table 77. Therefore, when the adjuster 78 is mounted on the adjusting table 77, the adjuster 78 is slidably supported in the horizontal direction, and is fixed at a predetermined position by a screw 79. FIG.
It is explanatory drawing of the state change of the adjustment position. Vertical feed shaft 3
0, the outer diameter reference center line P of the adjuster 78 is on the same line with respect to the vertical line Q of the vertical feed axis. For Q
Are arranged in the right direction (b), and the case where Q is in the left direction with respect to P is (c). In the adjustment position of (a), the vertical movement amount of the upper and lower bodies 44 and the feed base 20 is set as a reference position in which the amount of movement coincides with the phase. For this reason, the adjuster 78 is fixed to the adjustment table 77 at the position (a),
When the vertical feed shaft 30 and the left / right feed link 41 are connected, no movement of the left / right feed teeth 23 and 24 in the sliding direction occurs.
In the adjustment position (b), the left and right feed dogs move in the direction approaching the needle during cloth feeding, and try to move the cloth inward. (C)
In the adjustment position of, the left and right feed dogs move in a direction away from the needle when the cloth is fed, and try to extend the cloth. (B),
In (c), as the distance of the straight line Q from the straight line P increases, the momentum of the left and right feed dogs in the sliding direction increases.
Thus, when the fixed position of the adjuster 78 is changed, the phase and the momentum of the upper and lower bodies are changed with respect to the vertical movement phase of the feed bar 20. The adjuster 78, the adjusting table 77, and the screw 79 constitute a phase changing unit.

Next, seventh, eighth, and ninth embodiments of the present invention will be described with reference to FIGS. In the seventh, eighth and ninth embodiments, the sliding direction (the direction intersecting the cloth feeding direction)
This is a modified example of the cloth feeder provided with the conventional linear feed dog performing the four feed motions in addition to the left and right feed dogs provided with the movement to the right.

In the seventh embodiment shown in FIG. 17, left and right feed dogs 80 (right feed dogs),
On both sides of the (left feed dog), straight feed teeth 82 and 83 are provided along the cloth feed direction. These left and right feed dogs 8
Numerals 0 and 81 are C-shaped oblique teeth symmetrical along the cloth feeding direction. The linear feed teeth 82 and 83 are fixed to the feed base 20 and perform a conventional four-feed motion. Since the feed dogs are arranged in this way, even if the cloth is stretched or shifted by the left and right feed teeth 80, 81, the straightness of the cloth is maintained by the straight feed teeth 82, 83. In addition, since the left and right feed teeth are beveled, the cloth holding force in the left and right direction is improved, and the action on the cloth becomes effective.

In the eighth embodiment shown in FIG. 18, left and right feed dogs 84 (right feed dog) and 85 (left feed dog) to which a movement in the sliding direction is given are arranged upstream of the cloth feed direction. Then, the rectilinear feed teeth 86 were arranged on the downstream side in the cloth feed direction.
The needle drop point is set between the left and right feed dogs and the straight feed dog. For this reason, even if the cloth before sewing is extended or moved (shrinked), the cloth is fed by the straight feed teeth 86 after sewing (after the needle drop point), so that the straightness of the cloth is stabilized. In addition, since the left and right feed teeth 84 and 85 are symmetrical C-shaped oblique teeth along the cloth feed direction, the cloth holding force in the left and right directions is improved, and the action on the cloth is made effective.

In the ninth embodiment shown in FIG. 19, a straight feed tooth 87 is arranged on the right side and a slide feed tooth 88 is arranged on the left side along the cloth feeding direction. The slide feed dog 88
It is fixed to one of the left and right feed dogs 23 and 24 that slide by the left and right driving means described above. And
A linear feed dog 87 to which four feed motions are given by a vertical feed shaft and a horizontal feed shaft is arranged rightward where the slide feed dog 88 is given a motion. The left and right feed dogs 8
Reference numeral 8 denotes a bevel which is inclined in the cloth feeding direction. In the case of this configuration, even if the slide feed dog 88 moves the cloth toward the linear feed tooth 87, since the linear feed tooth 87 is arranged in the direction in which the cloth is moved, the straightness of the cloth is stabilized. In particular, when a guide for guiding the cloth to the cloth presser is provided along the sewing direction, the cloth end automatically follows the guide, thereby improving the quality of the sewn product.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the first embodiment, the right and left feed teeth 27 and 28 are provided with ribs,
Is an inverted-L shape in a side view, and the left feed dog 28 is an L-shape in a side view, so that rigidity of the feed dog can be obtained without taking a space. Instead, as shown in FIG. 10, it is easily conceivable that the right feed dog 27 has an L-shape in side view and the left feed dog 28 has an inverted L-shape in side view. Also, the right feed dog is combined with a U-shape in side view, the left feed dog is combined with a U-shape in side view, or the right feed dog is formed in a T shape in side view, and the left feed dog is formed in a U shape in side view. It is also conceivable that the ribs are alternately formed in a staggered manner when viewed from above.

In the first embodiment, the left and right feed dogs 2
The left and right drive means 51 capable of imparting a movement in the slide direction intersecting the cloth feed direction to the first and second feeders 7 and 28 include a vertical feed shaft 30, an interlocking body 42, a shaft 43, an upper and lower body 44, and a left and right feed dog link 4.
5, 46 and the like.

Alternatively, the left and right driving means may include, along the sliding direction Y, two cylinders fixed to the feed base and a left and right feed tooth base 2 connected to a rod of the cylinder.
It is also conceivable that the configuration is made up of 3, 24. That is, by controlling the plurality of cylinders in synchronization with the vertical movement of the left and right feed dogs, the left and right feed dogs can be separated and approached to prevent puckering.

In the second embodiment, a motor is used as the left and right driving means. However, it is easily conceivable to use one electromagnetic cylinder instead. That is, the electromagnetic cylinder rod is fixed to the sewing machine frame so as to face vertically upward, and this rod and the upper and lower bodies 44 are connected. The upper and lower bodies 44 are moved by moving the electromagnetic cylinder up and down.
The puckering can be prevented by separating and approaching the left and right feed dogs through such as. The motor, the electromagnetic cylinder, the pneumatic cylinder, and the like are collectively referred to as an actuator.

In the above embodiment, the sliding direction Y
Although only the direction perpendicular to the cloth feed direction was used, the slide direction may be easily changed to a right and left feed direction opposite to the cloth feed direction. These directions and the like are collectively referred to as directions crossing the cloth feed.

It is also conceivable to easily control the left and right feed dogs so as not to move in the sliding direction at the time of reverse feed by using the phase changing means such as the motor.

Further, the feed dogs 4 and 5 of the conventional feed device shown in FIG.
Even if it is replaced with 7, 28, the rigidity of the left and right feed dogs is increased, and it is easily conceivable that wear and the like do not occur between the feed dogs.

In the above embodiment, one support shaft is fixed to each of the left and right feed dogs. Instead, two support shafts are fixed to each of the left and right feed dogs to support each of them. It is easily conceivable to have four support holes corresponding to the shaft.

In the above-described embodiment, the upper and lower bodies 44 and the left and right feed dog stands 23 and 24 are connected to the left and right feed dog links 45 and 4.
The connection shape is V-shaped, and the connection shape may be a parallel link shape.

In the phase changing means of the above embodiment, the eccentric cam 75, the adjusting table 78 and the adjuster 78 are used for the connecting portion between the vertical feed shaft 30 and the left and right feed link 41. Instead of this, it is easily conceivable to use the above-mentioned phase changing means in the connecting portion between the vertical feed shaft 30 and the vertical feed cam 32.

[0096]

As described above, according to the first and second aspects of the present invention, when the left and right feed dogs are moved in the sliding direction without increasing the length of the support holes and the length h of the cloth feed base in the sliding direction. The occurrence of backlash is prevented. Further, there is provided a sewing machine feeding device in which puckering is prevented.

According to the third aspect of the present invention, since the support shaft is arranged without being separated from the feed dog table, there is no possibility that the support shaft interferes with the shuttle of the sewing machine or the shuttle shaft. The device can be downsized.

According to the invention described in claim 4, since the side wall portion of the feed dog table also serves as the stopper function of the left and right feed tooth tables, the cloth feeder can be further miniaturized.

According to the invention as set forth in claim 5, rattling of the feed dog in the sliding direction can be more reliably prevented.

According to the invention described in claim 6, since the left and right feed dogs have rigidity capable of resisting a load from the upper surface, the straightness of the cloth is maintained.

According to the invention, the rigidity of the left and right feed dogs is further improved.

According to the invention described in claim 8, since the grip portions do not wear, the life of the device is improved.

According to the ninth aspect of the present invention, by changing the holding position of the eccentric pin and holding it at a predetermined position,
The position of the left and right feed dogs can be finely adjusted. For this reason, more optimal movement in the sliding direction can be given in consideration of the balance between the left and right feed dogs.

According to the tenth aspect of the present invention, the phase changing means changes the phase of the upper and lower bodies with respect to the vertical movement of the needle bar, so that the movement of the left and right feed dogs in the sliding direction at the time of cloth feeding is reduced. It can be moved closer to the needle (shrinking the cloth), separated from the needle (stretching the cloth), and can eliminate the movement in the sliding direction (no expansion or contraction to the cloth). Therefore, by adjusting the phase changing means, it is possible to give an optimal movement according to the sewing conditions.

According to the eleventh aspect of the present invention, when the straight feed teeth are provided outside the left and right feed teeth along the cloth feed direction, the straight running property is stabilized. Further, if the straight feed teeth are provided downstream of the left and right feed teeth, the straight feed teeth feed the cloth after sewing, so that the straightness of the cloth is stabilized.

According to the twelfth aspect of the present invention, it is possible to perform sewing with straight running stability while the sewn material is moved in one of the left and right directions. In particular, when the cloth presser is provided with a guide (wall) for guiding the cloth along the sewing direction, the cloth edge automatically follows the guide, thereby improving the quality of the sewn product.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a front view of the first embodiment after assembly.

FIG. 3 is an exploded view of each part in FIG. 2;

FIG. 4 is a side view of each part shown in FIG. 2;

FIG. 5 is an exploded view and an assembly view of a feed dog.

FIG. 6 is a sectional view taken along line KK of FIG. 5;

FIG. 7 is an exploded perspective view of the second embodiment.

FIG. 8 is an exploded perspective view of the third embodiment.

FIG. 9 is an explanatory diagram of the fourth embodiment.

FIG. 10 shows a modified example of the feed dog rib structure.

FIG. 11 shows a conventional feed dog device.

FIG. 12 is an exploded perspective view of the fifth embodiment.

FIG. 13 is a side view of a main part of the fifth embodiment.

FIG. 14 shows details of a cam portion according to the fifth embodiment.

FIG. 15 shows details of a cam portion according to the sixth embodiment.

FIG. 16 is an explanatory diagram of a cam portion adjusting position according to the sixth embodiment.

FIG. 17 is an explanatory diagram of the seventh embodiment.

FIG. 18 is an explanatory diagram of the eighth embodiment.

FIG. 19 is an explanatory diagram of the ninth embodiment.

[Explanation of symbols]

 27 right feed dog 28 left feed dog 65 right feed dog 66 left feed dog 20 feed bar 35 vertical drive 38 horizontal drive 51 left and right drive 63 Left and right driving means 29a Right support shaft (support shaft) 29b Left support shaft (support shaft) 67 Square pin (support shaft) 68 Square pin (support shaft) 21c Support hole 21d Support Hole 21m square hole (support hole) 21n square hole (support hole) 26 slide rail (engaging means) 9 guide groove (engaging means) 23 right feed tooth block 24 left Feeding tooth base 23d Notch 24d Notch 27b Right grip (grip) 28b Left grip (grip) 27ba Rib 28ba Rib 80, 81 Left-right feed Teeth 84, 85 ... left and right feed teeth 82, 83, 86 ... straight forward feed teeth 88 ... Ride the feed dog 87 ... straight feed dog

Claims (12)

[Claims] 1. A right feed dog divided along a cloth feed direction.
Left and right feed dogs comprising a left feed dog, a feed base for supporting these left and right feed teeth movably in a direction intersecting with the cloth feed direction, and vertical drive means for imparting a vertical motion to the left and right feed teeth, A cloth feeder for a sewing machine, comprising: a horizontal drive unit that applies a horizontal movement to the left and right feed dogs; and a left and right drive unit that can apply a movement in a slide direction intersecting the cloth feed direction to the left and right feed dogs. , A plurality of support shafts individually fixed to the left and right feed dogs and arranged along a sliding direction, and at least the feed base for supporting the support shafts so as to be individually movable along the sliding direction. And a plurality of support holes formed at both ends of the sewing machine. 2. The cloth feeder for a sewing machine according to claim 1, wherein the feed base guides the left and right feed teeth in a slide direction at a position separated from the support hole by a predetermined amount in the cloth feed direction. A cloth feeding device for a sewing machine, comprising an engaging means capable of being restricted in a vertical direction. 3. The cloth feeder for a sewing machine according to claim 1, wherein said left and right feed dogs are individually held by a left and right feed dog, and said support shaft is fixed to said left and right feed dog. A cloth feeding device for a sewing machine, characterized in that one of the left and right feed dogs has a notch for freely moving a support shaft fixed to the other feed dog. 4. A cloth feeding device for a sewing machine according to claim 2, wherein a horn-shaped mounting hole in which said left and right feed dog rest is mounted is formed in said main body of said feed base, and said left and right feed is carried out. A cloth feeder for a sewing machine, characterized in that a tooth base can be locked on a side wall of the square mounting hole. 5. The cloth feeding device for a sewing machine according to claim 1, wherein said support shaft is a square pin, and said support hole is a square hole slidably supporting said square pin. A cloth feeder for a sewing machine. 6. A right feed dog divided along a cloth feed direction.
Left and right feed dogs comprising a left feed dog, a feed base for supporting these left and right feed teeth movably in a direction intersecting with the cloth feed direction, and vertical drive means for imparting a vertical motion to the left and right feed teeth, A cloth feeder for a sewing machine, comprising: a horizontal drive unit that applies a horizontal movement to the left and right feed dogs; and a left and right drive unit that can apply a movement in a slide direction intersecting the cloth feed direction to the left and right feed dogs. The cloth feeder for a sewing machine according to any one of claims 1 to 6, wherein the teeth of the left and right feed teeth are fixed at both ends by gripping portions. 7. The cloth feeding device for a sewing machine according to claim 6, wherein a reinforcing rib is formed on the grip portion. 8. The sewing machine cloth feeder according to claim 6, wherein the grip portions of the left and right feed teeth are arranged so as to overlap with a predetermined gap. Cloth feeder. 9. A right feed dog divided along a cloth feed direction.
Left and right feed dogs comprising a left feed dog, a feed base for supporting these left and right feed teeth movably in a direction intersecting with the cloth feed direction, and vertical drive means for imparting a vertical motion to the left and right feed teeth, A cloth feeder for a sewing machine, comprising: a horizontal drive unit that applies a horizontal movement to the left and right feed dogs; and a left and right drive unit that can apply a movement in a slide direction intersecting the cloth feed direction to the left and right feed dogs. An upper and lower body slidably supported in a vertical direction, a left and right feed dog link having one end connected to the upper and lower body and the other end connected to the left and right feed dog. A plurality of connecting pins for connecting the left and right feed dog links and the upper and lower bodies or the left and right feed teeth, wherein at least one of the connecting pins is an eccentric pin, and the eccentric pin is held at a predetermined position. That sewing machine of the cloth feed device. 10. A left and right feed dog comprising a right feed dog and a left feed dog divided along the cloth feed direction, and a feed base for supporting these left and right feed teeth movably in a direction intersecting the cloth feed direction. Vertical drive means for applying a vertical motion to the left and right feed dogs via the feed table; horizontal drive means for applying a horizontal motion to the left and right feed teeth via the feed table; Left and right driving means capable of imparting a movement to a left and right feed dog in a slide direction intersecting with the cloth feeding direction, wherein the left and right driving means is provided with a vertical movement, An upper and lower body slidably supported along the up and down direction; a left and right feed dog link having one end connected to the upper and lower body and the other end connected to the left and right feed dog; On the other hand, the phase of the upper and lower Cloth feed device of a sewing machine, characterized by comprising a phase changing means for further. 11. The cloth feeder for a sewing machine according to claim 9, wherein the feed base is provided with four feed movements by a vertical feed shaft and a horizontal feed shaft, and is located outside or downstream of the left and right feed teeth. , A straight feed dog is arranged along a cloth feed direction, and the straight feed dog is fixed to the feed table. 12. A feed base for supporting the slide feed dog so as to be movable in a direction intersecting with the cloth feed direction; and vertical drive means for applying a vertical movement to the slide feed tooth via the feed base. A horizontal drive unit that applies a horizontal motion to the slide feed dog via the feed table; a left and right drive unit that can apply a motion in one direction intersecting the cloth feed direction to the slide feed dog; A cloth feeder for a sewing machine, comprising a linear feed dog provided with four feed motions by a vertical feed shaft and a horizontal feed shaft on one side of the movement of the slide feed dog.