JP2000271364A - Cloth feeding mechanism for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce time for adjusting the tension of a thread by applying movement in a direction of moving away from a needle and crossing with a cloth feeding direction to both of or either of feed dogs in feeding cloth by the feed dogs by synthetic driving of the feed dogs by each driving means, so as to prevent puckering. SOLUTION: When starting driving, an up/down body 27 is vertically reciprocated along a groove via a shaft 28. When the body 27 is moved up, a shaft 30 is moved up in a vertical direction. Thus, feed dogs 16 and 16' respectively receive acting force in the direction of moving away from a needle N via feed dog links 29, 29', and are moved in parallel in a horizontal direction orthogonal to a cloth feeding direction along grooves 12, 12' of a feed table 1 with feed dogs 2 and 2'. The movement of the dogs 2 and 2' to right and left becomes the synthesized movement of the vertical and horizontal movement of the dogs 2 and 2' and by the movement of the dogs 2 and 2', the cloth receives acting force in the direction of moving away to right and left from the needle N to be sent in the cloth feeding direction stretched in a horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth feed mechanism for a sewing machine, and more particularly to a cloth feed mechanism in which a feed dog is provided with a vertical movement and a horizontal movement so that the feed dog performs four cloth feed movements. To a cloth feed mechanism of a sewing machine.

[0002]

2. Description of the Related Art A cloth feed mechanism of a sewing machine of this type is described below.
This will be described with reference to FIG. Reference numeral 1 denotes a feed table, on which a feed dog 2 is fixed above the right end, and an arm 3 extending downward is formed below the right end. Reference numeral 4 denotes a vertical feed shaft, and the vertical feed shaft 4 is provided with a vertical feed cam 5 as vertical drive means. Reference numeral 6 denotes a vertical feed link, the upper end of which is rotatably connected to the vertical feed cam 5, and the lower end which is rotatably connected to the arm 3 of the feed base 1. Reference numeral 7 denotes a horizontal feed shaft, which is swung by horizontal drive means (not shown), and has a horizontal feed arm 8 fixed to its shaft end. A left end of the feed base 1 is rotatably connected to an upper end of the horizontal feed arm 8 by a shaft 8 '.

[0003] The cloth feed mechanism comprises a vertical feed shaft 4
, The right end of the feed bar 1 is moved up and down via the vertical feed link 6, and the left end of the feed bar 1 is reciprocated in the horizontal direction by the swing of the horizontal feed shaft 7.
The feed dog 2 feeds the cloth by performing so-called cloth feed four movements by vertical movement and horizontal movement with respect to the upper surface of the feed dog groove 10 of the needle plate 9 shown in FIG.

[0004]

However, the conventional cloth feeding mechanism has the following problems.
With this conventional zigzag sewing machine with a cloth feed mechanism,
When the zigzag stitches as shown in FIG. 36 are formed, the stitches are alternately formed by swinging the needle left and right for each stitch, and each time the stitches are formed, the stitches are sewn by a balance or cloth feed. In order to tighten and tighten the thread, the right and left seams are pulled in the direction of the arrow approaching the seam due to the tension of the seam at the time of the thread tightening, and as a result, the cloth is wrinkled in the vertical direction, so-called puckering. This causes a problem that the commercial value of the product is reduced.

Further, two or three parallel stitches are formed on a cloth by a multi-needle sewing machine having a conventional cloth feed mechanism and having two or three needles, and the upper surface of the parallel seam is formed. Also, in a so-called upper decorative sewing machine in which the upper decorative thread is sewn in a zigzag shape, in order to sew the upper decorative thread by applying tension, the left and right seams are attracted to each other by the tension of the upper decorative thread, and as a result, the vertical Wrinkles in the direction,
There is a problem that so-called puckering occurs and the commercial value of the product decreases.

[0006] If the tension of the yarn is reduced to reduce the puckering, inconsistency such as inadequate tightening of the yarn occurs, and it takes time to adjust the tension of the yarn.
There were problems such as a decrease in sewing work efficiency.

[0007]

Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 comprises a feed dog divided into two parts on the left and right, a vertical drive means for imparting a vertical movement to these feed teeth, A horizontal drive means for imparting a horizontal motion to the feed dogs; and a left and right drive means for imparting a motion in a direction crossing the cloth feed direction to both or one of the feed dogs. By means of the combined driving of the feed dogs by means, when the cloth is fed by the feed dogs, a movement in a direction away from the needle and intersecting with the cloth feed direction is imparted to both or one of the feed teeth.

According to a second aspect of the present invention, in the cloth feeding mechanism for a sewing machine according to the first aspect, the movement of the feed dog apart from the needle in a direction crossing the cloth feeding direction is performed in a direction perpendicular to the cloth feeding direction. It was configured to move in parallel along the horizontal plane. According to a third aspect of the present invention, in the cloth feeding mechanism of the sewing machine according to the first aspect, the movement of the feed dog in a direction away from the needle and crossing the cloth feed direction is performed with the feed axis of the feed tooth centered on a vertical axis. The tip was configured to move in a sector along a horizontal plane away from the needle.

According to a fourth aspect of the present invention, in the cloth feeding mechanism for a sewing machine according to the first aspect, the movement of the feed dog in a direction away from the needle and crossing the cloth feeding direction is separated from the needle about the horizontal axis. The feed dog moved in a sector along the vertical plane. The invention according to claim 5 is
A feed dog that is divided into at least two right and left, a feed base that movably supports the feed dog in a direction that intersects the cloth feed direction, vertical drive means that imparts vertical movement to the feed dog, and the feed dog Horizontal drive means for imparting a horizontal motion to, and left and right drive means connected to the vertical feed shaft of the vertical drive means and capable of imparting motion to the feed dog in a direction intersecting the cloth feed direction. And a composite movement of the feed dog by the vertical drive unit, the horizontal drive unit, and the left and right drive unit, so that the feed dog can be moved away from the needle in a direction intersecting the cloth feeding direction.

According to the first, second, third, fourth, and fifth aspects of the present invention, when the cloth is fed by the feed dog at which the tension of the thread due to thread tightening is greatest, the cloth in the sewn portion is moved in the cloth feeding direction. Since the force acting in the direction away from the crossing needle acts, the fabric is not drawn inward by the tension of the thread due to the thread tightening, so that puckering is prevented from occurring and a good-looking sewing product is obtained. In addition, since the time required for adjusting the tension of the thread is not increased, the sewing operation efficiency is improved.

According to a sixth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the left and right driving means is rotatably supported by a horizontal feed shaft of the horizontal driving means. According to the sixth aspect of the invention, since the horizontal feed shaft is used as the support shaft, the size of the apparatus can be reduced.

According to a seventh aspect of the present invention, in the sewing machine cloth feed mechanism according to the fifth aspect, the feed dog is slidably supported by the feed table along a direction orthogonal to the cloth feed direction. . According to the seventh aspect of the invention, puckering is more reliably prevented. According to an eighth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the feed dog includes a support shaft (77, 78) and a support portion (73a, 74a, 94).
a, 97a), and these are the supported portions (71
ca, 71d, 93b, 93d, 81).

According to the eighth aspect of the present invention, the apparatus can be easily assembled and disassembled during maintenance. According to a ninth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the teeth of the feed dog are bevel teeth. According to the ninth aspect of the present invention, in the case where the amount of movement of the feed dog is the same, the beveled teeth have a larger stretching effect on the cloth than the parallel teeth, so that the occurrence of puckering can be reliably prevented. .

According to a tenth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the feed dog is divided into three parts, and the feed dog at the center is held by the feed base (1). The left and right feed dogs can be contacted and separated by the left and right driving means. According to the tenth aspect, the occurrence of puckering is reliably prevented while maintaining the straightness of the cloth.

According to an eleventh aspect of the present invention, in the sewing machine cloth feeding mechanism according to the tenth aspect, the feed dog at the central portion is a parallel tooth, and the left and right feed teeth are bevel teeth.
According to the eleventh aspect, the occurrence of puckering is more reliably prevented. According to a twelfth aspect of the present invention, in the cloth feeding mechanism for a sewing machine according to the fifth and eleventh aspects, the feed dogs that can be brought into contact with and separated from each other by the left and right driving means are configured such that the feed teeth can be supported mutually.

According to the twelfth aspect, the support structure of the feed dog is compact, and the feed dog moves smoothly. According to a thirteenth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the left and right driving members (29, 27) of the left and right driving means are arranged at a predetermined distance from the hook shaft center.

According to the thirteenth aspect, the shuttle can be easily attached and detached. The invention according to claim 14 is
The cloth feed mechanism of a sewing machine according to claim 5, wherein the left and right driving means are connected via adjustment members (84, 86) capable of changing at least one of a momentum and a phase of the vertical feed shaft. According to the invention of claim 14,
Optimal motion can be given to the feed dog according to the sewing conditions.

According to a fifteenth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the fifth aspect, the left and right driving means includes a pair of feed dog links and an upper and lower body. According to the invention described in claim 15, it is possible to impart a predetermined motion to the feed dog with a simple configuration. According to a sixteenth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the eighteenth aspect, the upper and lower bodies are supported by a feed base so as to be vertically movable.

According to the sixteenth aspect of the present invention, since the upper and lower bodies are supported by the feed stand along the vertical direction,
The movement of the feed dog is performed more smoothly via the upper and lower bodies. According to a seventeenth aspect of the present invention, a feed dog that is divided into at least two right and left, a feed base that supports the feed dog so as to be movable in a direction intersecting with the cloth feed direction, and imparts a vertical motion to the feed dog. Vertical drive means, horizontal drive means for imparting horizontal motion to the feed dog, left and right drive members capable of imparting motion to the feed dog in a direction intersecting the cloth feed direction,
An actuator for vertically moving the left and right driving member; a direction intersecting the cloth feeding direction separated from the needle by the combined movement of the feeding teeth by the vertical driving means, the horizontal driving means and the left and right driving members. The exercise can be given.

The invention according to claim 18 is the sewing machine according to claim 17, wherein the actuator is a motor or a cylinder. Claim 1
According to the inventions described in 7 and 18, puckering can be reliably prevented by using an actuator that is driven independently. The invention according to claim 19 is the invention according to claims 1, 5, and 1.
7. In the cloth feeding mechanism for a sewing machine according to 7, the needle bar supporting member that movably supports the needle bar in a direction perpendicular to the cloth feeding direction, and a drive that imparts a swinging motion to the needle bar via the needle bar supporting member. And a motor.

According to the nineteenth aspect, even when the present invention is applied to a so-called electronic staggered sewing machine, puckering can be reliably prevented. According to a twentieth aspect of the present invention, in the sewing machine cloth feeding mechanism according to the nineteenth aspect,
There is provided control means for controlling the actuator in accordance with the swing amount of the needle bar swing movement.

According to the twentieth aspect, puckering can be more reliably prevented according to the sewing conditions.

[0023]

Embodiments of the present invention will be described below. First, the configuration of the first embodiment will be described with reference to FIGS. Reference numeral 1 denotes a feed base, in which a square hole 11 is formed in the center, and two parallel grooves 12, 12 'facing each other are formed in the feed base 1 before and after the hole 11. The feed base 1 has a vertically extending groove 1 extending downward.
A guide portion 14 formed with 3 and an arm 15 extending forward from below are formed.

Reference numerals 16 and 16 'denote a pair of feed dog bodies, on each of which upper surfaces are fixed with feed teeth 2 and 2' and formed with connecting portions 17 and 17 'projecting downward. 16, 16 ′ are loosely fitted to the two grooves 12, 12 of the feed base 1 so as to be movable left and right. 18
Reference numeral denotes a vertical feed shaft which is rotated by driving of the sewing machine. The vertical feed shaft 18 is provided with a vertical feed cam 5 as vertical drive means and an eccentric cam 19 as left / right drive means.

A horizontal feed shaft 33 is reciprocated by a horizontal feed mechanism (not shown) and has a
An interlocking body 23 integrally formed with an interlocking arm 20 and a drive arm 22 having a forked portion 21 is rotatably supported, and at the left end,
The lower end of the horizontal feed arm 8 is fixed. The upper end of the horizontal feed arm 8 is rotatably connected to the left end of the feed base 1 by a shaft 32.

Reference numeral 6 denotes a vertical feed link, the upper end of which is rotatably connected to the vertical feed cam 5 serving as the vertical drive means, and the lower end of which is rotatably connected to the arm 15 of the feed base 1 by means of a shaft 24. ing. Reference numeral 25 denotes a left-right feed link whose right end is connected to the eccentric cam 19 and whose left end is rotatably connected to the tip of the interlocking arm 20 of the interlocking body 23 by a shaft 26.

Reference numeral 27 denotes an upper and lower body, the left end of which is the guide 1
The shaft 28 fixed to the right end is loosely fitted to the forked portion 21 of the driving arm 22 and connected to the right end. 29, 29 'are feed dog links, and the lower ends of the feed dog links 29, 29' are rotatably connected to the upper and lower body 27 by a shaft 30 having a horizontal axis parallel to the cloth feeding direction. The upper end of the feed dog link 29 is rotatably connected to the connecting portion 17 of the feed dog base 16 by a shaft 31 having a horizontal axis parallel to the cloth feeding direction.
The upper end of 9 'is rotatably connected to the connecting portion 17' of the feed dog base 16 'by a shaft 31' having a horizontal axis parallel to the cloth feeding direction.

In this embodiment, the upper and lower bodies 27 and the feed dog links 29 and 29 'constitute left and right driving means. Next, the operation of the first embodiment will be described.
First, when the sewing machine is driven and the vertical feed shaft 18 rotates,
With the vertical feed cam 5, the feed base 1 via the feed link 6
And the horizontal feed drive mechanism (not shown) swings the horizontal feed shaft 33, and the swing of the horizontal feed shaft 19 causes the feed base 1 to move horizontally through the horizontal feed arm 8. give. The vertical motion and the horizontal motion of the feed base 1 cause the feed dog bodies 16 and 16 ′ to move.
Performs the same four movements of cloth feeding as before.

Further, in this embodiment, the rotation of the vertical feed shaft 18 causes the eccentric cam 19 to rotate, thereby horizontally moving the interlocking body 23 through the left and right feed link 25 and the interlocking arm 20 of the interlocking body 23. Swing about the axis 33,
By the swing of the interlocking body 23, the forked part 21 of the interlocking body 23 is
Swings, and the upper and lower body 27 reciprocates up and down along the groove 13 via the shaft 28. As shown in FIG. 5, when the upper and lower bodies 27 rise from the state shown in FIG. 5A due to the vertical movement of the upper and lower bodies 27, the shaft 30 rises in the vertical direction. The body 16, 16 'receives an acting force in a direction away from the needle N, and the acting force causes the feed dog bodies 16, 16' to move along the feed teeth 2, 2 'along the grooves 12, 12' of the feed base 1. 5b to move in parallel with the horizontal direction orthogonal to the cloth feeding direction, and reach the position shown in FIG. 5b.

Conversely, when the upper and lower body 27 is lowered from the position shown in FIG. 5B, the feed dog bodies 16, 16 'are moved via the feed dog links 29, 29' because the shaft 30 is lowered vertically.
The feed teeth 16 and 16 ′ are orthogonal to the cloth feed direction along the grooves 12 and 12 ′ of the feed base 1 together with the feed teeth 2 and 2 ′ by the action force in the direction approaching the needle N. It moves parallel to the horizontal direction and assumes the position of FIG. 5a.

The movement of the feed dogs 2 and 2 'in the left-right direction substantially starts from the timing when the tip of the needle N comes out of the cloth, that is, from the time when the feeding of the feed teeth 2, 2' starts in the cloth feed direction. The movement in the direction away from the needle N is started, and the movement in the direction approaching the needle N is started from the time when the needle N pierces the cloth, that is, the time when the cloth feeding by the feed dogs 2 and 2 'ends.

The movement of the feed dogs 2 and 2 'in the left and right direction is a combined movement of the vertical movement and the horizontal movement of the feed dogs 2 and 2'. The plane shape of the movement trajectory is as shown in FIG.
The cloth is fed to the cloth feeding direction while being stretched in the lateral direction by receiving an acting force in a direction away from the left and right. In addition, since the combined movement of the vertical movement, the horizontal movement, and the left-right movement of the feed dogs 2 and 2 ′ in each of the embodiments described below is the same as the above-described embodiment, In the example, the description of the combined movement of the feed dogs 2, 2 'will be omitted.

Next, the configuration of the second embodiment will be described with reference to FIGS. In the first embodiment described above, the feed dogs 2 and 2 'are separated from and approached to the needle N in opposite directions. However, in the second embodiment, one of the feed dogs is used. Only 2 is configured to be separated or approached from the needle N. Therefore, the feed dog body 16 having the feed dog 2a corresponding to the feed dog 2 'in the first embodiment.
a is fixed to the feed base 1 and the feed dog link 29 'for driving the feed dog body 16' of the first embodiment is removed, and the other configuration is the same as that of the first embodiment.
The same components as those of the first embodiment are denoted by the same reference numerals, and detailed description of the configuration and operation is omitted.

In this embodiment, the driving arm 22
The upper and lower body 27 and the feed dog link 29 constitute left and right driving means. Thus, when the sewing machine is driven, the upper and lower bodies 27 shown in FIG. 9 are reciprocated up and down by the same operation as in the first embodiment. First, when the upper and lower bodies 27 rise from the state of FIG. 9A, the shaft 30 rises in the vertical direction.
The acting force in the direction away from the needle N is received, and by this acting force, the feed dog 16 and the feed dog 2
Move parallel to the horizontal direction perpendicular to the cloth feed direction along with the position shown in FIG. 9B, but the feed dog 2a does not move rightward.

Conversely, when the upper and lower body 27 descends from the position shown in FIG. 9B, the shaft 30 descends vertically, so that the feed dog base 16 exerts an acting force in the direction approaching the needle N via the feed dog link 29. With this action, the feed dog body 16 moves along with the feed dog 2 along the groove 12 of the feed base 1 in a horizontal direction orthogonal to the cloth feed direction, and reaches the position shown in FIG. 9A. Does not move.

In the second embodiment, the embodiment in which only the feed dog 2 is reciprocated in the left-right direction has been described. On the contrary, the feed dog 2 is fixed, and only the feed dog 2 'is left and right. It is also possible to adopt a configuration of reciprocating in the direction. In the first embodiment described above, both the feed dogs 2 and 2 'are separated or approached in the opposite directions with respect to the needle N, respectively. Although the embodiment in which only the feed dog 2 or the feed dog 2 'separates from or approaches the needle N has been described, each embodiment described below has been described in the first embodiment. Only the embodiment in which both the feed dogs 2 and 2 ′ are separated from and approached to the needle N in the opposite direction will be described, and only one of the feed dogs is separated from the needle N, Although the description of the embodiment of the approaching configuration is omitted, in each of the embodiments described below, in the second embodiment, only one of the feed dogs 2 or 2 ′ described above is Of course, it can be configured to be separated or approached. It is a theory.

Next, the configuration of the third embodiment will be described with reference to FIGS. This embodiment, like the first and second embodiments, has a feed dog body 16, 16 'having a feed dog 2, 2'.
Are loosely fitted in the grooves 12 and 12 ′ of the feed base 1, and the upper and lower body 27 is moved up and down by the forked portion 21. The feature of the configuration of the third embodiment is that
A cam body 35 having a U-shaped groove cams 34, 34 'is provided, and the groove cams 34, 34' are connected to the connecting portions 17, 17 of the feed dog bodies 16, 16 'having the feed teeth 2, 2'. In this configuration, the shafts 31 and 31 'supported by' are loosely fitted.

In this embodiment, the left and right driving means are constituted by the upper and lower bodies 27 and the cam body 35. Thus, when the sewing machine is driven, the upper and lower bodies 27 shown in FIG. 1 are vertically reciprocated by the same operation as in the first embodiment. First, when the upper and lower bodies 27 rise from the state shown in FIG. 11A, the cam body 35 and the upper and lower bodies 27 rise in the vertical direction.
4 'receives an acting force in a direction away from the needle N, and the acting force moves the feed dog body 16 along with the feed dog 2 to the left in the horizontal direction orthogonal to the cloth feeding direction along the groove 12 of the feed base 1. Then, the feed dog body 16 'moves to the right in the horizontal direction orthogonal to the cloth feed direction along the groove 12 of the feed base 1 together with the feed dog 2', and assumes the position shown in FIG. 11B.

Conversely, when the upper and lower bodies 27 descend from the position shown in FIG. 11B, the cam body 35 descends in the vertical direction together with the upper and lower bodies 27, so that the feed dog bodies 16 and 16 '
4, 34 'receives the acting force in the direction approaching the needle N,
By this acting force, the feed dog body 16 moves to the right in the horizontal direction orthogonal to the cloth feed direction along the groove 12 of the feed base 1 together with the feed dog 2, and the feed dog body 16 'moves together with the feed dog 2' to the feed base. It moves to the left in the horizontal direction orthogonal to the cloth feeding direction along one groove 12, and reaches the position in FIG. 11A.

Next, the configuration of the fourth embodiment will be described with reference to FIGS. The features of the configuration of the fourth embodiment are as follows.
The U-shaped groove cams 34 and 34 'above the upper and lower bodies 27 in the configuration of the third embodiment are replaced with inverted U-shaped groove cams 34 and 34'.
A cam body 35 is provided.
Connecting part 1 of feed dog bodies 16 and 16 'having feed teeth 2 and 2'
In this configuration, the shafts 31 and 31 'supported by the shafts 7 and 17' are loosely fitted. In this embodiment, the upper and lower bodies 27 and the cam body 35
These form left and right driving means.

Thus, when the sewing machine is driven, the upper and lower bodies 2 shown in FIG.
7 is reciprocated up and down.
Since 4 'is inverted C-shaped, the moving direction of the feed dogs 2, 2' with respect to the vertical movement of the upper and lower body 27 is opposite to that of the third embodiment. That is, when the upper and lower bodies 27 descend from the state shown in FIG. 13A, the feed teeth 2, 2 '
When the upper and lower bodies 27 rise from the state shown in FIG. 13B, the feed teeth 2 and 2 'move toward the needle N as shown in FIG. 13A. It moves parallel to the horizontal direction perpendicular to the feed direction.

Accordingly, in the fourth embodiment, the feed teeth 2, 2 'are moved down by the lower
And the feed teeth 2 and 2 'approach the needle N by raising the upper and lower body 27, so that the drive arm 22 having the bifurcated portion 21 shown in the first and second embodiments is connected to the eccentric cam 19. Eccentric cam 19 having a phase 180 degrees different from the phase of
It needs to be driven by another eccentric cam.

Next, the configuration of the fifth embodiment will be described with reference to FIGS. The fifth embodiment is similar to the first embodiment shown in FIG.
Driven by an interlocking body 23 having
Are fixedly fitted in the grooves 12, 12 'of the feed table 1 of the first embodiment shown in FIG.

In the structure of the fifth embodiment, as shown in FIG. 16, a support arm 36 is provided on the feed base 1 and is suspended downward and bent at the lower end into an L-shape. The L-shaped interlocking body 37 is rotatably supported by a shaft 38. The interlocking body 37 has a bifurcated portion 39 formed on the upper side and one end of the interlocking body 2 of the first embodiment.
A shaft 40 that is loosely fitted to the forked portion 21 of the third shaft 3 is supported. 4
Reference numeral 1 denotes a sliding body, which is slidably supported on the feed table 1 in a horizontal direction parallel to the cloth feeding direction. The sliding body 41 is provided with a horizontal shaft 42 that is loosely fitted to the forked portion 39 of the interlocking body 37 and a shaft 43 that is perpendicular to the upper end. Reference numerals 44 and 44 'denote feed dog links. One end of each of the feed dog links 44 and 44' is rotatably connected to the shaft 43 of the interlocking body 37 as shown in FIG. The other end of the feed dog link 44 'is rotatably connected to the feed dog body 16' by a shaft 45 '.

In this embodiment, the interlocking member 37, the sliding member 41, and the feed dog links 44 and 44 'constitute left and right driving means. When the sewing machine is driven in the fifth embodiment, as in the first embodiment, the feed base 1 moves the feed teeth 2 and 2 'together with the feed tooth bases 16 and 16' in the same manner as in the prior art in four movements of cloth feed. Do.

In addition to the four movements of the feed dogs 2 and 2 'for feeding the cloth, the bifurcated portion 21 of the interlocking body 23 of the first embodiment provides
The shaft 40 in FIG. 16 is reciprocated. When the shaft 40 is reciprocated, the interlocking body 37 is reciprocated about the shaft 38, and this rotation is performed from the forked portion 39 of the interlocking body 37 to the shaft 4 of the sliding body 41.
15 and 17, the shaft 43 of the sliding body 41 shown in FIGS. 15 and 17 is reciprocated up and down, and the feed dogs 2 and 2 ′ are moved right and left in the direction of coming and going with respect to the needle N as described below. And reciprocate in parallel.

When the shaft 43 moves downward from the state shown in FIG. 17A, the feed dog body 1 is moved via the feed dog links 44 and 44 '.
6, 16 'receive an acting force in a direction away from the needle N, and the acting force causes the feed dog bodies 16, 16' along with the feed teeth 2, 2 'along the grooves 12, 12' of the feed base 1. It moves parallel to the horizontal direction perpendicular to the cloth feed direction,
7b.

Conversely, when the shaft 43 is raised from the position shown in FIG. 17B, the feed dog body 1 is fed via the feed dog links 44 and 44 '.
6, 16 'receive an action force in a direction approaching the needle N, and the feed teeth 16, 16' move along with the feed teeth 2, 2 'along the grooves 12, 12' of the feed base 1 by this action force. Moving in parallel to the horizontal direction orthogonal to the cloth feeding direction, FIG.
a.

Next, the structure of the sixth embodiment will be described with reference to FIGS. The sixth embodiment has a configuration that does not include the interlocking body 37 for driving the feed dog stages 16 and 16 ′ described in the fifth embodiment described above, and the other configurations are the same as those of the fifth embodiment. The same is true. The feature of the sixth embodiment is that a shaft 43 'corresponding to the shaft 43 rotatably supporting the feed dog links 44, 44' of the fifth embodiment has a lower end as shown in FIG. A collar 47 is formed on the frame 46 of the sewing machine so as to be freely movable up and down. The feed dog links 44, 4 are located above the flange 47 of the shaft 43 '.
4 ′ is rotatably supported, and a collar 48 is fixed to the upper end of the shaft 43 ′ with a screw 49, so that the feed dog link 4
4, 44 'is prevented from falling upward.

In this embodiment, the sliding body 41 and the feed dog links 44 and 44 'constitute left and right driving means. From the state shown in FIG. 18a of the sixth embodiment, when four movements of cloth feed are performed and the feed base 1 moves upward,
The shaft 4 to which one end of the feed dog link 44, 44 'is connected
5, 45 'also moves upward, but since the shaft 43' does not move, the feed dog link 44 moves clockwise about the shaft 43 'and the feed dog link 44' moves counterclockwise about the shaft 43 '. Respectively, and by this rotation, the feed dog bodies 16, 1
6 'is the groove 12, 1 of the feed base 1 together with the feed teeth 2, 2'.
Move in the horizontal direction perpendicular to the cloth feed direction along 2 ',
The position shown in FIG.

Conversely, when the feed base 1 is moved downward by the four movements of the cloth feed from the position of FIG. 18b, the shafts 45, 45 'to which one ends of the feed dog links 44, 44' are connected.
Also moves downward, but because the shaft 43 'does not move, the feed dog link 44 rotates counterclockwise about the shaft 43' and the feed dog link 44 'rotates clockwise about the shaft 43'. By this rotation, the feed dog bodies 16 and 16 'move in parallel with the feed teeth 2 and 2' in the horizontal direction orthogonal to the cloth feeding direction along the grooves 12 and 12 'of the feed base 1, and the feed dogs The positions 2 and 2 ′ approach the needle N as shown in FIG.

The feed dog links 44 and 44 'are also moved in the vertical direction together with the feed base 1 during the four movements of the cloth feed described above, but this vertical movement is such that the lower end of the shaft 43' is moved to the frame 46. It is absorbed by moving up and down. Next, FIG.
The configuration of the seventh embodiment will be described with reference to FIG. The feature of the seventh embodiment is that, as in the above-described embodiments, the feed dog bodies 16 and 16 ′ having the feed teeth 2 and 2 ′
Are not loosely fitted in the grooves 12, 12 'of the feed dog body 16,
16 ′ is connected to and supported by the feed dog links 44, 44 ′ on the feed base 1 and the feed dog links 50, 50 ′.

One end of each of the feed dog links 44 and 44 'is rotatably supported by the shaft 43 of the sliding body 41 in the same manner as in the fifth embodiment shown in FIGS. The other end of each of the feed teeth bodies 16 and 16 '
Are connected to each other by shafts 45 and 45 '. Also,
One end of each of the feed dog links 50 and 50 ′ is rotatably supported by a shaft 43 supported by the feed base 1.
The other ends of 0 and 50 'are rotatably supported by the shafts 51 and 51' with respect to the feed dog bodies 16 and 16 '.

In this embodiment, the sliding body 41, the feed dog links 44 and 44 'and the feed dog links 50 and 50' constitute left and right driving means. When the sewing machine is driven in the seventh embodiment, as in the fifth embodiment, the feed base 1 moves the feed teeth 2 and 2 'together with the feed tooth bases 16 and 16' in the same manner as in the prior art in four movements of cloth feed. Do.

In addition to the four movements of the feed teeth 2 and 2 'for feeding the cloth, the shaft 43 of the sliding body 41 shown in FIGS. 20 and 21 is reciprocated up and down similarly to the operation of the fifth embodiment. As described below, the feed dogs 2 and 2 'are reciprocated right and left in a direction of coming and going with respect to the needle N. When the shaft 43 moves downward from the state of FIG. 21a, the feed dog links 44, 44 '
, And the shaft 43 moves downward, so that the feed dog link 50,
50 'also pivots in opposite directions about the axis 43' in the fixed position, whereby the teeth 16, 16 'receive an acting force away from the needle N, respectively, as shown in FIG. 21b. . By this acting force, the feed dog bodies 16, 1
6 'moves in parallel with the feed dogs 2 and 2' in the horizontal direction orthogonal to the cloth feeding direction, and assumes the position shown in FIG. 21b.

Conversely, when the shaft 43 rises from the position shown in FIG. 21B, the feed dog links 44 and 44 'rotate around the shaft 43 in the opposite directions to the above, respectively.
The upward movement of the shaft 43 causes the feed dog link 5
0 and 50 'are also rotated in opposite directions about the shaft 43' in the fixed position, so that the tooth bodies 16 and 16 '
Receive the acting force in the direction approaching the needle N, respectively, as shown in FIG. 21a. By this action force, the feed dog body 16,
16 'moves in parallel with the feed dogs 2 and 2' in the horizontal direction orthogonal to the cloth feeding direction, and assumes the position of FIG. 21a.

Next, the configuration of the eighth embodiment will be described with reference to FIG. The feature of the eighth embodiment is that, as in the above-described embodiments, the feed dog bodies 16 and 1 having the feed teeth 2 and 2 'are provided.
6 'is not loosely fitted in the grooves 12, 12' of the feed base 1, and the feed dog bodies 16, 16 '
Upper feed dog links 52, 52 'and feed dog links 53, 5
3 'and connected and supported.

One end of each of the feed dog links 52, 52 'is rotatably supported on the feed table 1 (not shown) by shafts 54, 54', and the other end is provided by shafts 55, 55 '. 16, 16 'rotatably supported. In addition, one end of the feed dog links 53, 53 'is rotatably supported by the feed base 1 (not shown) by shafts 56, 56', and the other end is driven by the feed teeth 16, 16 by shafts 57, 57 '. 'Is rotatably supported.

Reference numeral 58 denotes a driving body, and the shafts 55 and 55 '
The driving body 58 is reciprocated up and down by the sliding body 41 shown in the fifth embodiment of FIGS. 14 to 17. In this example,
The driving body 58, the feed dog links 52 and 52 ', and the feed dog links 53 and 53' constitute left and right driving means.

When the sewing machine is driven in the eighth embodiment, the feed base 1 performs four feed-feed movements of the feed teeth 2, 2 'together with the feed tooth bases 16, 16' in the same manner as in the prior art. In addition to the four movements of the feed teeth 2 and 2 'for cloth feeding, a driving body 58 is reciprocated up and down by a slide body 41 (not shown), and the feed teeth 2 and 2' are moved to the needle N as described below. It is reciprocated right and left in the direction of coming and going.

When the driving body 58 moves downward from the state shown in FIG. 22A, the shafts 55 and 55 'are pushed downward from the groove 59. As a result, the feed dog links 52, 52 '
The rotation of the feed dog links 53 and 53 ′ is also caused by the rotation of
It rotates around 6 'in the opposite direction. As a result, the tooth bodies 16, 16 'move in parallel with the feed dogs 2, 2' in the horizontal direction perpendicular to the cloth feeding direction away from the needle N, and assume the position shown in FIG. 22B.

Conversely, when the driving body 58 moves upward from the position shown in FIG. 22B, the shafts 55 and 55 ′ are pushed upward from the groove 59. As a result, the feed dog links 52, 52 'rotate in the opposite directions about the shafts 54, 54', respectively.
By this rotation, the feed dog links 53 and 53 'are
It rotates in opposite directions about 6, 56 '.
As a result, the tooth bodies 16 and 16 'move in parallel with the feed teeth 2 and 2' in the horizontal direction orthogonal to the cloth feeding direction approaching the needle N, and assume the position shown in FIG. 22A.

In this embodiment, when the cloth is fed in the cloth feed direction, the shaft 55 at the tip of the feed dog link 52 rotates clockwise about the shaft 54 and the feed dog link 52 '. Is rotated counterclockwise about the shaft 54 'to move the feed dogs 2 and 2' away from the needle N, so that the feed dogs 2 and 2 ' It moves in the direction away from the needle N while moving in the direction opposite to the feed direction.

Next, the configuration of the ninth embodiment will be described with reference to FIGS. The feature of the ninth embodiment is that, as in the above-described embodiments, the feed dog body 1 having the feed teeth 2 and 2 'is provided.
6, 16 'are not loosely fitted in the grooves 12, 12' of the feed base 1 and the feed teeth 2, 2 'do not move parallel to the direction away from the needle N, The end of the cloth feeding direction 2 'moves in a sector shape about the vertical axis in a direction away from the needle N.

Reference numerals 60 and 60 'denote rotary links to which the feed dogs 2 and 2' are fixed. The bases are rotatably supported on the feed base 1 by shafts 61 and 61 'having a vertical axis, and are respectively provided at the tips. The feed dog links 62, 62 'are connected to the shafts 63, 63'.
To be rotatably connected. Feed dog link 62, 62 '
Is rotatably supported by a shaft 43 of a sliding body 41 which is driven by the same mechanism as the fifth embodiment shown in FIGS.

In this embodiment, the sliding body 41 and the feed dog links 62 and 62 'constitute left and right driving means. In the ninth embodiment, when the sewing machine is driven, the feed dogs 2 and 2 'perform four cloth feeding movements together with the feed base 1 as in the prior art. In addition to the four movements of the feed dogs 2 and 2 'for feeding the cloth, the shaft 43 of the slide 41 is reciprocated up and down, and the tip of the feed dogs 2 and 2' is reciprocated in a fan shape as described below. .

When the shaft 43 moves downward from the state shown in FIG. 26a, the shafts 63, 6 are moved via the feed dog links 62, 62 '.
3 'are pushed away from each other, whereby the pivot links 60, 60' are pivoted in opposite directions about the axes 61, 61 ', respectively. As a result, the feed dogs 2 and 2 '
As shown in FIG. 6b, the leading ends of the feed dogs 2 and 2 'in the cloth feeding direction move in a sector shape about the shafts 61 and 61' in a direction away from the needle N.

By the fan-shaped movement of the feed dogs 2 and 2 ', the cloth fed in the cloth feeding direction is fed while being stretched in the lateral direction away from the needle N. When the shaft 43 moves upward from the state of 26b where the cloth feed ends, the feed dog link 62,
The shafts 63 and 63 ′ are pushed in the directions approaching each other via 62 ′, whereby the rotating links 60 and 60 ′
Each is rotated in the opposite direction about 61 '. As a result, the feed teeth 2, 2 'are moved in the direction of the cloth feed direction of the feed teeth 2, 2' toward the needle N as shown in FIG.
The fan moves in a fan-shaped manner around 1, 61 'to obtain the state shown in FIG. 26A.

Next, the configuration of the tenth embodiment will be described with reference to FIG. The feature of the tenth embodiment is that, similarly to the above-described embodiment, the leading ends of the feed teeth 2 and 2 ′ in the cloth feed direction move in a sector shape about the vertical axis in a direction away from the needle N.
The driving of the fan-shaped movement utilizes the movement of the feed base 1 in the cloth feeding direction. 60 and 60 'are the same as in FIG.
This is a rotary link to which the feed dogs 2 and 2 'are fixed. The base is rotatably supported on the feed base 1 by shafts 61 and 61' having a vertical axis. The contact portions 64, 64 'are formed. Numeral 65 denotes a cam body, which fixes the base to the frame, and has slopes 66, 6 at portions facing the contact portions 64, 64 ', respectively.
6 'is formed. 67 is a rotating link 6 at each end.
The springs 67 extend between the ends 0 and 60 ′, and the contact portions 64 and 64 ′ are pressed against the slopes 66 and 66 ′ of the cam body 65 by the tensile force of the spring 67.

In this embodiment, the cam body 65 and the rotating links 60 and 60 'constitute left and right driving means. In this tenth embodiment, when the sewing machine is driven, the feed dogs 2 and 2 'together with the feed base 1 perform four cloth feeding movements as in the conventional case. In addition to the four movements of the feed dogs 2 and 2 'for cloth feeding, the feed dogs 2 and 2' are reciprocated right and left in a direction of coming and going with respect to the needle N as described below.

When the feed base 1 moves upward for cloth feeding from the state shown in FIG. 27A, the abutting portions 64, 64 'make contact with the slopes 66, 66' of the cam body 65 at the fixed position. The width of the 66, 66 'is gradually increased, and the abutment portions 64, 64' are spread left and right against the tension of the spring, so that the feed dogs 2, 2 'are shown in FIG. 27b. As described above, the leading ends of the feed teeth 2 and 2 ′ in the cloth feeding direction move in a sector shape about the shafts 61 and 61 ′ in a direction away from the needle N.

By the fan-shaped movement of the feed dogs 2 and 2 ', the cloth fed in the cloth feeding direction is fed while being stretched in the lateral direction away from the needle N. When the feed base 1 moves downward from the state of 27b where the cloth feeding ends, the abutting portions 64 and 64 'come into contact with the slopes 66 and 66' of the cam body at the fixed position.
However, due to the tension of the spring 67, the spring 67 moves in a direction in which the width is reduced while being in contact with the slopes 66, 66 ', and the contact portions 64, 64'
The tip gradually approaches. With this, the feed dog 2, 2 '
As shown in FIG. 27a, the leading end of the feed dogs 2 and 2 ′ in the cloth feeding direction moves sectorally about the shafts 61 and 61 ′ in a direction approaching the needle N.

Next, the configuration of the eleventh embodiment will be described with reference to FIGS. The feature of the eleventh embodiment is that, at the time of cloth feeding, the movement of the feed dogs 2 and 2 'in the direction away from the needle N in the direction crossing the cloth feeding direction is as the distance from the needle about the horizontal axis is increased. , The feed dog moves in a fan shape along the vertical plane. The mechanism for driving the feed dog in the direction away from the needle N in this embodiment is the same as that in the first embodiment shown in FIGS. Description will be given with numbers.

Reference numerals 68, 68 'denote interlocking links, and the interlocking links 68, 68' have a shaft 69 having a horizontal axis at the center with respect to the guide portion 14 integrally extending downward from the feed base 1. And are rotatably supported. Further, feed teeth 16, 16 'to which the feed teeth 2, 2' are fixed are fixed to the distal ends of these interlocking links 68, 68 ', respectively. Reference numerals 70 and 70 'denote drive links, and the lower portions of the drive links 70 and 70' are slidably and loosely fitted into the grooves 13 of the guide portions 14 and move up and down by a drive mechanism interlocked with the sewing machine mechanism. Is rotatably supported on a shaft 30 of the motor. The leading ends of the interlocking links 68, 68 'and the driving links 70, 70' are respectively connected to the feed dog bodies 16, 1
It is rotatably connected to shafts 71, 71 'supported by 6'.

In this embodiment, the left and right driving means are constituted by the upper and lower bodies 27, the interlocking links 68 and 68 'and the driving links 70 and 70'. In this eleventh embodiment, when the sewing machine is driven, the feed dogs 2 and 2 'together with the feed base 1 perform four cloth feeding movements as in the conventional case. In addition to the four movements of the feed dogs 2 and 2 'for cloth feeding, the feed dogs 2 and 2' are reciprocated right and left in a direction of coming and going with respect to the needle N as described below.

When the shaft 30 of the upper and lower body 27 moves downward from the state shown in FIG. 31a in conjunction with the driving of the sewing machine, the shafts 71 and 71 'move downward via the drive links 70 and 70', respectively. The downward movement of the shafts 71, 71 'causes the interlocking links 68, 68' to rotate in opposite directions about the shaft 69, and the feed dogs 2, 2 'to move along the vertical plane about the shaft 69. Then, it moves in a fan shape in a direction away from the needle N to reach the state of FIG. 31B.

From the state shown in FIG.
Move the shafts 71, 71 'upward via the drive links 70, 70', respectively. This axis 7
The upward movement of 1, 71 'causes the interlocking links 68, 6
8 'rotates in opposite directions about the axis 69, and the feed dogs 2, 2' move the needle N along the vertical plane about the axis 69.
31b and moves in a fan-shaped direction in a direction approaching the state of FIG.

Next, the configuration of the twelfth embodiment will be described with reference to FIGS. 32 and 33. The feature of the twelfth embodiment is that, at the time of cloth feeding,
The movement of the feed dogs 2, 2 'away from the needle N in the direction crossing the cloth feeding direction is such that the feed dog moves in a fan shape along the vertical plane as it moves away from the needle about the horizontal axis. .

Since this embodiment is basically a configuration obtained by partially changing the configuration of the eleventh embodiment, only the changed portions will be described. This embodiment is different from the eleventh embodiment in that the axes 69 of the interlocking links 68, 68 '
Is divided into two shafts 69, 69 ', and the shaft 30 of the upper and lower body 27 of the drive link 70, 70' is changed to the shafts 70, 7 '.
This is a configuration separated into 0 '.

In this embodiment, the left and right driving means are constituted by the upper and lower bodies 27, the interlocking links 68 and 68 'and the driving links 70 and 70'. In this twelfth embodiment, when the sewing machine is driven, the feed dogs 2 and 2 'together with the feed base 1 perform four cloth feeding movements as in the conventional case. In addition to the four movements of the feed dogs 2 and 2 'for cloth feeding, the feed dogs 2 and 2' are reciprocated right and left in a direction of coming and going with respect to the needle N as described below.

When the shafts 30, 30 'of the upper and lower bodies 27 move downward from the state shown in FIG.
The shafts 71, 71 'are respectively moved downward via the drive links 70, 70'. The downward movement of the shafts 71, 71 'causes the interlocking links 68, 68' to move the shafts 69, 69 '.
33, the feed dogs 2 and 2 'move in a fan shape along the vertical plane about the shafts 69 and 69' in a direction away from the needle N to the state shown in FIG. 33b. .

From the state shown in FIG.
When 0, 30 'moves upward, the drive links 70, 7
The shafts 71, 71 'are respectively moved upward through 0'. Due to the upward movement of the shafts 71, 71 ', the interlocking links 68, 68' rotate in opposite directions about the shafts 69, 69 ', respectively, and the feed dogs 2, 2' move about the shafts 69, 69 '. Then, it moves in a fan shape along the vertical plane in a direction approaching the needle N to reach the state shown in FIG. 33B.

Next, a thirteenth embodiment of the present invention will be described.
This will be described with reference to FIGS. 37 and 38. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. FIG. 37 is an exploded perspective view of the thirteenth embodiment, and FIG.
38 is a detailed view of a J part in FIG. 37. The feed base 71 has a square hole 71b formed at the center of a flat surface 71a, and a shuttle 91 is disposed below the hole 71b.
Then, along the direction (the Y direction in the drawing) orthogonal to the cloth feeding direction, side walls 71c and 71d are provided on the side of the flat surface 71a.
Are formed facing each other. Further, an arm 72 having a side L shape is fixed to a lower portion of one side of the flat surface 71a. The feed teeth 79, 80 are
It is composed of feed teeth 73 and 74 and teeth 75 and 76. To the pair of feed teeth 73, 74, teeth 75, 76 are fixed to the upper surface, respectively, so that side ends (supports) 73a, 74a extend. In addition, the feed dog 7
One end of each of the support shafts 3 and 74 has a support shaft 77 and 7 along the Y direction.
8 are protruded.

The feed teeth 73 and 74 placed on the flat surface 71a of the feed table have their support shafts 77 and 78 formed by holes 71ca (supported portions) formed in the side wall 71c of the feed table.
It is loosely fitted along the Y direction so as to be movable. A support plate (upper side) 81 is fixed to the upper part of the side wall 71d of the feed stand by a screw (not shown).
The side wall 71d forms a U-shaped groove 82 (supported portion). Side ends (supporting portions) 73a and 74a of the feed dog body are loosely fitted in the grooves 82 (supported portions) along the Y direction.

As shown in FIG. 38 (1), the first adjusting member 83 is attached to the vertical feed shaft 18 which rotates by driving the sewing machine.
Is provided. The first adjusting member 83 includes the vertical feed shaft 1
8, a plate-shaped adjustment table 84, an adjuster 86 slidably supported by the adjustment table along the X direction, and a screw 85 for fixing the adjuster 86 at a predetermined position. . The adjuster 86 is formed with a groove 86a slidably supported by upper and lower portions 84a and 84b of the adjusting table, and a long hole 86b for loosely fitting the vertical feed shaft 18.

Further, as shown in FIG. 38 (2), a second adjusting member 110 can be used in place of the first adjusting member 83. The second adjusting member 110 includes an eccentric cam 111 rotatably supported by the vertical feed shaft 18 and a screw 112. The eccentric cam 111 includes a supported shaft 111a and an eccentric cam portion 111b. 37, the right end is connected to the adjuster 86 of the first adjustment member or the eccentric cam portion 108 of the second adjustment member, and the left end is connected to the interlocking arm 20 of the interlocking body 23 by the shaft 26. . The interlocking body 23 is rotatably supported by the horizontal feed shaft 33 and includes an interlocking arm 20 and a bearing 87.

The pin 28, one end of which is fixed to the bearing 87 by a screw (not shown), has the other end loosely fitted into the elongated hole 88a of the upper and lower body 88. The upper and lower body 88 has a box-shaped main body 88c, a horn-shaped protrusion 88b formed on the right side of the main body, an arc-shaped protrusion 88d formed by projecting on the upper part of the main body, and a direction orthogonal to the cloth feeding direction. A long hole 88a formed in the main body along the direction (Y direction in the drawing), a support shaft 89 protruding from both ends of the main body along the Y direction, and both ends of an arc-shaped projection along the X direction. And a shaft 30 protruding from the side.

Further, shafts 31a and 31b are provided at lower connecting portions of the feed dog bodies 73 and 74, respectively.
One end of a connection hole formed at both ends of the plate-shaped feed dog link 29a is connected to the shaft 31a at the other end, and one end of the plate-shaped feed dog link 29b is connected to the shaft 31b.
Are rotatably connected to each other. The angular projections 88 b of the upper and lower bodies 88 are formed in the vertical grooves 7 formed in the lower portion of the arm 72.
2a, and is supported movably in the vertical direction. The support shaft 89 is loosely fitted to the arc portions 90aa and 90bb of the pair of regulating members 90a and 90b fixed to both sides of the arm 72 by screws (not shown), and is supported movably in the vertical direction. That is, the upper and lower bodies 88 are provided with the vertical grooves 7 of the arm 72.
2a and the arc portions 90aa and 90bb of the regulating member are movably supported in the vertical direction.

The eccentric cam 5 attached to the end of the vertical feed shaft 18 is rotatably connected to the upper end of the vertical link 6. The lower end of the upper and lower link 6 is rotatably connected to the arm 72 of the feed stand via the shaft 24. The lower end of the horizontal feed arm 8 is fixed to the end of the horizontal feed shaft 33.
The upper end of the horizontal feed arm 8 is rotatably connected to a feed table 71 via a shaft 32.

Next, the operation of the thirteenth embodiment will be described.
First, when the sewing machine is driven and the vertical feed shaft 18 rotates,
With the vertical feed cam 5, the feed base 1 via the feed link 6
, And the horizontal feed shaft 33 is rotated (oscillated) by a horizontal feed drive mechanism (not shown),
By the rotation of the horizontal feed shaft 33, a horizontal motion is given to the feed base 71 via the horizontal feed arm 8. This slide 7
The feed dog 7 is moved by the vertical movement and the horizontal movement of 1.
Nos. 9 and 80 perform four cloth feeding movements as in the prior art.

Further, in this embodiment, the rotation of the vertical feed shaft 18 causes the adjuster 86 of the first adjustment member or the eccentric cam portion 108 of the second adjustment member to rotate. The interlocking body 23 and the pin 28 are swung about the horizontal feed shaft 33 via the arm 20. The swing of the pin 28 is transmitted only by the vertical movement of the pin 28 by the long hole 88a of the upper and lower body, and moves the upper and lower body 88 up and down. At this time, the upper and lower bodies 88 are vertically movably supported by the vertical grooves 72a and the regulating members 90a and 90b, and thus smoothly reciprocate in the vertical direction without rattling.

When the upper and lower bodies 88 move up, the shaft 30 moves up in the vertical direction, so that the feed dogs 79 and 80 receive an acting force in the direction away from the needle via the feed dog links 29a and 29b, respectively. The feed teeth 79 and 80 move in parallel in the horizontal direction (Y direction) perpendicular to the cloth feeding direction by the holes 71ca and the grooves 82, which are the supported portions of the feed table.

On the other hand, when the upper and lower bodies 88 move down, the feed dogs 79 and 80 move parallel to the Y direction so as to approach the needle. The amount of movement of the feed teeth 79 and 80 in the Y direction (to approach and separate from each other) is shown by loosening the screw 85 of the first adjusting member in FIG. It is adjusted by moving a predetermined amount in the direction. That is, the swing amount and phase of the adjuster 86 due to the rotation of the vertical feed shaft 18 change, and the interlock 23 and the pin 28
The vertical movement (phase, amount of movement) of the upper and lower body 88 changes. 38. The opening and closing amounts of the feed teeth 79 and 80 for moving the adjuster 86 to the right side in FIG. , The opening and closing amounts of the feed dogs 79 and 80 are set to increase.

When the screw 112 of the second adjusting member shown in FIG. 38 (2) is loosened and the eccentric cam 111 is rotated and fixed at a predetermined position, the momentum of the upper and lower body 88 changes. Next, a fourteenth embodiment of the present invention will be described with reference to FIGS. The fourteenth embodiment is different from the thirteenth embodiment in the shape of the feed bar and the feed dog, but the other configurations are the same.
The description is omitted.

FIG. 39 is an exploded perspective view of a main part of the fourteenth embodiment, and FIG. 40 is an assembled side view of the fourteenth embodiment. The feed stand 93 is a member having a U-shape in a plane, and a shuttle 91 is arranged on the lower surface of the center notch. A side wall 93d is formed on the right end surface of the feed base along the Y direction in the figure, and a groove 82 (supported part) is formed by a support plate 81 fixed on the upper side by a screw (not shown). An L-shaped side arm 72 is fixed to a lower portion of the feed base 93.

The left feed dog 96 of the feed dog mounted on the flat surface of the feed table 93 is from the feed tooth body 94 and the tooth part 95 fixed to the upper surface thereof, and the right feed tooth 99 is the feed tooth body 97 and the upper surface thereof. Is fixed to the tooth portion 98. Further, one end of each of the feed dog bodies 94 and 97 has a support shaft 7 along the Y direction.
7, 78 are protruded respectively. Feed dogs 94, 9
Reference numeral 5 denotes one end 94 of the feed dog body which is placed on the flat surface 93a of the feed base 93 and is loosely fitted in the groove 82 which is a supported part of the feed base.
a, 97a and a support shaft 77 loosely fitted in the engagement hole 93b;
From 78, the feed dog bodies 94 and 95 are movably supported along the Y direction in the figure.

As in the thirteenth embodiment, the left and right feed dogs 9
Reference numerals 6 and 99 are mounted on the feeder 93 and connected to the upper and lower bodies 88 via the feed dog links 29a and 29b. At this time, the tooth lower surface 95a of the left feed dog is supported by the support 98b of the right feed dog, and the tooth lower surface 98a of the right feed dog is supported by the support 95b of the right feed dog. That is, the left and right feed dogs are mutually supported.

Further, as shown in FIG. 40, the feed dog links 29a and 29b and the upper and lower
Is arranged at a predetermined distance from the hook shaft center 91a, so that the hook 91 can be easily attached and detached. The expression “separated by the predetermined amount” means that the overlapping area of the left and right driving members is preferably 以下 or less of the hook projection plane (the hook 91 in FIG. 40), and more preferably there is no overlapping portion.

Next, a fifteenth embodiment of the present invention will be described.
A description will be given based on FIG. 41 which is an exploded perspective view of this embodiment. In the thirteenth embodiment, the upper and lower bodies 88 constituting the left and right driving members are connected to the vertical feed shaft 18, whereas in the fifteenth embodiment, the upper and lower bodies 88 are driven by the motor 102. Are different. The description of the same configuration as that of the thirteenth embodiment is omitted.

The left and right driving members capable of imparting Y-direction motion to the feed dogs 79 and 80 are a pair of feed dog links 29a and 29.
b and an upper and lower body 88 for opening and closing them. The output shaft end of the motor 102 fixed to the sewing machine frame is fixed to the center of the swing plate 101. Rocking plate 10
The other end of the pin 28 whose one end is loosely fitted in the elongated hole 88a of the upper and lower body 88 is fixed to one end. When the motor 102 rotates, the swing plate 101 and the pin 28 swing to move the upper and lower body 88 in the up and down direction.
The opening and closing of 29b causes the feed dogs 79 and 80 to approach and separate in the Y direction.

A controller (control means) 103 for controlling the rotation of the motor 102 is connected to the motor 102. The control means 103 has a CPU, ROM,
An input setting means having a RAM and a needle position signal for detecting the vertical position of the needle and an operator can arbitrarily set by a key switch are connected to the CPU input side. Then, after these input signals and data are calculated by the CPU, a drive signal is output to the motor 102 via the driver circuit. With this drive signal, the feed dog can be moved toward and away in the Y direction as in the first and thirteenth embodiments. That is, when the needle tip comes off the cloth according to the needle position signal, the motor 102 is rotated clockwise and the feed teeth 79,
80 is separated in the Y direction, and the motor 102 is rotated in the counterclockwise direction from the time when the cloth feeding ends, so that the feed dog approaches in the Y direction. Further, the motor 102 can arbitrarily control the drive timing and the drive amount of the motor 102 by the input setting means according to the sewing conditions such as the material and thickness of the cloth, and form stitches without puckering. be able to.

The fifteenth embodiment is not limited to the cam-driven staggered sewing machine in which the needle bar is swung in a direction perpendicular to the cloth feeding direction by a cam interlocking with the main shaft of the sewing machine.
For example, the present invention can be easily applied to an electronic staggered sewing machine in which the needle bar 107 is swung in the Y direction via the needle bar support member 106 by the stepping motor 105 shown in FIG. In this electronic staggered sewing machine, the amount of needle swing (the amount of needle bar swing) of the stepping motor 105 is controlled by pattern data selected by the operator.

It is easily conceivable to control the driving amount of the motor 102 in accordance with the amount of swing. That is, the amount of needle swing is input to the control means 102, and the amount of drive of the motor 102 is increased or decreased in accordance with the amount of needle swing (the amount of swing of the needle bar swinging motion) to increase or decrease the amount of movement of the feed dog in the Y direction. In this way, an optimum seam can be formed. When the amount of needle swing increases, the amount of movement of the feed dog in the Y direction is increased to prevent occurrence of puckering.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the first embodiment, the thirteenth embodiment, the fourteenth embodiment, and the fifteenth embodiment, the left and right driving means capable of imparting a motion to the feed dog in a direction intersecting the cloth feeding direction opens and closes. It is composed of a pair of feed dog links, an upper and lower body movably supported by a feed base in the vertical direction, and an actuator or a vertical feed shaft for moving the upper and lower bodies in the vertical direction.

Instead, a plurality of cylinders capable of moving the individual feed dogs in the Y direction are fixed to the feed table, and by controlling these cylinders, the feed dogs are moved toward and away from the Y direction to perform puckering. It is easy to prevent it. Although the motor is used as the actuator in the fifteenth embodiment, an electromagnetic cylinder may be used instead. That is, it is also conceivable that the rod of the electromagnetic cylinder is fixed to the sewing machine frame so as to move in the vertical direction, and the vertical body 88 is moved up and down by driving the rod.

In the above-described embodiment, the parallel feed teeth are used. Instead, as shown in FIG. 43, the pair of feed teeth 108 and 109 are formed in a C-shape along the cloth feeding direction. It is easily conceivable to use beveled teeth. This bevel 108,
If 109 is used, even if the amount of movement of the feed dog in the Y direction is the same,
This has the effect that the stretching action on the cloth is greater than when using parallel teeth.

In the above-described embodiment, the feed dog is divided into two parts on the left and right. Alternatively, the feed dog at the center fixed to the feed table shown in FIG. It is also conceivable that a left feed dog and a right feed dog are provided on the left and right, and the left and right feed dogs can be brought into and away from each other by left and right driving means. The use of the three divided central feed dogs and left and right feed dogs can reliably prevent puckering while maintaining the straightness of the cloth. It is also conceivable that the left and right feed teeth are beveled.

In the above embodiment, the left and right driving means are rotatably supported by the horizontal feed shaft. Alternatively, for example, the left and right driving means may be supported by a shaft protruding in one horizontal direction on the sewing machine frame. It is easy to think about it. Further, the feed teeth of the first embodiment, the thirteenth embodiment, the fourteenth embodiment, and the fifteenth embodiment are slidably supported by the feed table along a direction orthogonal to the cloth feeding direction. I have. Instead of this, for example, it is easily considered that a groove is formed in the feed base in an inverted C-shape in the cloth feeding direction, and the feed dog is slid along the inverted C-shaped groove. Can be At this time, a universal joint may be easily used for a connecting portion between the feed dog and the feed dog link.

[0109]

As described above, claims 1, 2, 3, 4, 5
According to the invention described, at the time of feeding the cloth by the feed dog in which the tension of the thread due to the thread tightening is greatest,
Since a force is applied in the direction crossing the cloth and moving away from the needle, the cloth is not drawn inward due to the tension of the thread due to thread tightening. As a result, the commercial value of the product is improved, and the time required for adjusting the tension of the thread is not required, so that the sewing operation efficiency is improved.

According to the invention of claim 6, since the horizontal feed shaft is used as the support shaft, the size of the apparatus can be reduced. According to the seventh aspect of the invention, puckering is more reliably prevented. According to the eighth aspect of the present invention, the assembling work of the apparatus and the disassembling work at the time of maintenance can be easily performed.

According to the ninth aspect of the present invention, when the amount of movement of the feed dog is the same, the beveled teeth have a greater effect of stretching the cloth than the parallel teeth, so that the occurrence of puckering is reliably prevented. be able to. According to the tenth aspect, the occurrence of puckering is reliably prevented while maintaining the straightness of the cloth.

According to the eleventh aspect, the occurrence of puckering is more reliably prevented. According to the twelfth aspect of the present invention, the support structure of the feed dog is compact,
The feed dog moves smoothly. According to the thirteenth aspect, the hook can be easily attached and detached.

According to the fourteenth aspect of the present invention, an optimal movement can be given to the feed dog according to the sewing conditions.
According to the invention described in claim 15, it is possible to impart a predetermined motion to the feed dog with a simple configuration. According to the sixteenth aspect of the present invention, since the upper and lower bodies are supported by the feeder along the vertical direction, the movement of the feed dog is performed more smoothly via the upper and lower bodies.

According to the seventeenth and eighteenth aspects of the present invention, puckering can be reliably prevented by using an independently driven actuator. According to the nineteenth aspect, even when the present invention is applied to a so-called electronic staggered sewing machine, puckering can be reliably prevented.
According to the twentieth aspect, puckering can be more reliably prevented according to the sewing conditions.

[Brief description of the drawings]

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

FIG. 2 is a front view of the first embodiment of the present invention.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a left side view of FIG.

FIG. 5 is an explanatory diagram for explaining the operation of the first embodiment of the present invention.

FIG. 6 is a diagram of a movement trajectory of a feed dog according to the first embodiment of the present invention.

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

FIG. 8 is a front view of a second embodiment of the present invention.

FIG. 9 is an explanatory diagram for explaining the operation of the second embodiment of the present invention.

FIG. 10 is a front view of a third embodiment of the present invention.

FIG. 11 is an explanatory diagram for explaining the operation of the third embodiment of the present invention.

FIG. 12 is a front view of a fourth embodiment of the present invention.

FIG. 13 is an explanatory diagram for explaining the operation of the fourth embodiment of the present invention.

FIG. 14 is a front view of a fifth embodiment of the present invention.

FIG. 15 is a plan view of FIG.

FIG. 16 is a left side view of FIG.

FIG. 17 is an explanatory diagram for explaining the operation of the fifth embodiment of the present invention.

FIG. 18 is an explanatory diagram for explaining the operation of the sixth embodiment of the present invention.

FIG. 19 is a sectional view taken along line AA of FIG. 18a.

FIG. 20 is a plan view of a seventh embodiment of the present invention.

FIG. 21 is an explanatory diagram for explaining the operation of the seventh embodiment of the present invention.

FIG. 22 is an explanatory diagram for explaining the operation of the eighth embodiment of the present invention.

FIG. 23 is a front view of a ninth embodiment of the present invention.

FIG. 24 is a plan view of FIG. 23;

FIG. 25 is a left side view of FIG.

FIG. 26 is an explanatory diagram for explaining the operation of the ninth embodiment of the present invention.

FIG. 27 is an explanatory diagram for explaining the operation of the tenth embodiment of the present invention.

FIG. 28 is a front view of an eleventh embodiment of the present invention.

FIG. 29 is a plan view of FIG. 28.

FIG. 30 is a left side view of FIG. 28.

FIG. 31 is an explanatory diagram for explaining the operation of the eleventh embodiment of the present invention.

FIG. 32 is a front view of a twelfth embodiment of the present invention.

FIG. 33 is an explanatory diagram for explaining the operation of the twelfth embodiment of the present invention.

FIG. 34 is a side view of a conventional cloth feeding mechanism.

FIG. 35 is a plan view of a feed dog in a conventional cloth feed mechanism.

FIG. 36 is a plan view of a zigzag seam.

FIG. 37 is an exploded perspective view of a thirteenth embodiment of the present invention.

38 is a detailed view of a portion J in FIG. 37.

FIG. 39 is an exploded perspective view of a fourteenth embodiment of the present invention.

FIG. 40 is a side view of the fourteenth embodiment.

FIG. 41 is an exploded perspective view of a fifteenth embodiment of the present invention.

FIG. 42: Needle bar drive unit of an electronic staggered sewing machine

FIG. 43 is an explanatory diagram in the case of bevel teeth

[Explanation of symbols]

 Reference Signs List 1 feed table 2, 2 'feed dog 5 vertical feed cam (vertical drive means) 6 feed link (vertical drive means) 18 vertical feed shaft (vertical drive means) 19 eccentric cam (left / right drive means) 23 interlocking body (left / right drive means) 25 left-right feed link (left-right drive means) 27 vertical body (left-right drive means) 29 feed dog link (left-right drive means) 29 'feed dog link (left-right drive means) 35 cam body 35 (left-right drive means) 41 sliding body ( Left and right driving means) 44 Feed dog link (Left and right driving means) 44 'Feed dog link (Left and right driving means) 50 Feed dog link 50' Feed dog link 52 Feed dog link 52 'Feed dog link 53 Feed dog link 53' Feed dog link Reference Signs List 60 rotating link 60 'rotating link 62 feed dog link 62' feed dog link 65 cam body left and right driving means 68 feed dog link 68 ' Feed dog link 70 feed dog link 70 'feed dog link 71 feed stand 79 feed dog 80 feed dog 81 arm 29a feed dog link 29b feed dog link 88 up and down body 84 adjusting stand 86 regulator 96 feed dog 99 feed dog 93 feed stand 91 Hook 102 Motor 108 Bevel 109 Bevel

Claims (20)

[Claims] A feed dog which is divided into two parts to the left and right, up and down drive means for giving vertical movement to these feed teeth, horizontal drive means for giving horizontal movement to those feed teeth, Left and right driving means for imparting a movement in a direction intersecting the cloth feeding direction to both or one of the feed dogs. A cloth feed mechanism for a sewing machine, characterized in that both or one of the feed dogs is provided with a movement in a direction away from the needle and crossing the cloth feed direction. 2. A movement according to claim 1, wherein the movement of the feed dog away from the needle in a direction crossing the cloth feeding direction moves in parallel along a horizontal plane perpendicular to the cloth feeding direction. Sewing machine cloth feed mechanism. 3. The movement of the feed dog away from the needle in the direction intersecting with the cloth feeding direction, wherein the movement of the feed tooth in the feed direction of the feed tooth moves about a vertical axis along a horizontal plane separated from the needle. The cloth feed mechanism for a sewing machine according to claim 1, wherein: 4. The movement of the feed dog in a direction away from the needle and crossing the cloth feeding direction is such that the feed dog moves sectorally along a vertical plane as the distance from the needle is centered on the horizontal axis. The cloth feed mechanism for a sewing machine according to claim 1. 5. A feed dog which is divided into at least two sides, a feed base for supporting the feed dog so as to be movable in a direction intersecting with the cloth feed direction, and a vertical drive means for applying a vertical motion to the feed dog. Horizontal drive means for imparting horizontal movement to the feed dog, and coupled to an up-down feed shaft of the up-down drive means,
Left and right driving means capable of imparting a movement to the feed dog in a direction intersecting the cloth feeding direction; and a needle for the feed dog by a combined movement of the feed dog by the vertical driving means, the horizontal driving means and the left and right driving means. A cloth feed mechanism of a sewing machine that can move in a direction that crosses the cloth feed direction by separating from the cloth feed direction. 6. The cloth feeding mechanism for a sewing machine according to claim 5, wherein said left and right driving means is rotatably supported on a horizontal feed shaft of said horizontal driving means. . 7. The sewing machine according to claim 5, wherein said feed dog is slidably supported by a feed base along a direction orthogonal to a cloth feed direction. Cloth feeding mechanism. 8. The sewing machine cloth feed mechanism according to claim 5, wherein said feed dog has a support shaft and a support portion, and these are supported by a supported portion of the feed base. Cloth feed mechanism. 9. The cloth feeding mechanism for a sewing machine according to claim 5, wherein the teeth of said feed dog are beveled teeth. 10. The cloth feeding mechanism for a sewing machine according to claim 5, wherein said feed dog is divided into three, a feed dog at a central portion is held by a feed table, and left and right feed teeth are driven by said left and right drive. A cloth feeding mechanism for a sewing machine, wherein the cloth feeding mechanism is capable of coming and going by means. 11. The cloth feeding mechanism for a sewing machine according to claim 10, wherein the feed dog at the center is a parallel tooth, and the left and right feed teeth are bevel teeth. 12. The cloth feed mechanism for a sewing machine according to claim 5, wherein said feed dogs which can be separated from each other by said left and right driving means can support each other. Feed mechanism. 13. The cloth feeding mechanism for a sewing machine according to claim 5, wherein the left and right driving members of the left and right driving means are arranged at a predetermined distance from the shuttle shaft center. . 14. A cloth feeding mechanism for a sewing machine according to claim 5, wherein said left and right driving means are connected via an adjusting member capable of changing at least one of a momentum and a phase of a vertical feeding shaft. Sewing machine cloth feed mechanism. 15. The cloth feeding mechanism for a sewing machine according to claim 5, wherein said left and right driving means comprises a pair of feed dog links and upper and lower bodies. 16. A cloth feeding mechanism for a sewing machine according to claim 15, wherein said upper and lower bodies are supported by a feed table so as to be movable in a vertical direction. 17. A feed dog which is divided into at least two right and left sides, a feed base for supporting the feed dog so as to be movable in a direction intersecting with the cloth feed direction, and a vertical drive means for applying a vertical motion to the feed dog. Horizontal driving means for applying a horizontal motion to the feed dog; a left and right drive member capable of applying a motion to the feed dog in a direction intersecting the cloth feeding direction; and moving the left and right drive member in the vertical direction. A sewing machine cloth which is capable of imparting a movement in a direction intersecting with the cloth feed direction by separating the feed dog from the needle by a combined movement of the feed dog by the vertical drive means, the horizontal drive means, and the left and right drive member. Feed mechanism. 18. The cloth feeding mechanism for a sewing machine according to claim 17, wherein said actuator is a motor or a cylinder. 19. A needle feeder according to claim 1, 5 or 17, further comprising: a needle bar support member for movably supporting a needle bar in a direction perpendicular to the cloth feed direction; And a drive motor for imparting a swinging motion to the needle bar. 20. A cloth feeding mechanism for a sewing machine according to claim 19, further comprising control means for controlling said actuator in accordance with a swing amount of said needle bar swinging movement. mechanism.