JP2001025591A - Needle feed sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed needle with higher accuracy by simple constitution. SOLUTION: A needle feed means has a needle oscillation supporting member for freely oscillatably supporting a needle, a single pulse motor 37 for converting the rotating motion of a sawing machine drive shaft 6 to the oscillating motion of the needle oscillation supporting member and link mechanisms 21A, 21B, 21C and 21D for respectively changing the presence or absence of the needle oscillation supporting member as well as the oscillation angle and oscillation starting direction of the needle oscillation supporting member according to the rotating angle of an output shaft 38 of the pulse motor 37. The rotating angle of the output shaft 38 of the pulse motor 37 for setting a desired needle feed direction and needle feed angle is set at a certain corresponding angle, by which the revolutions of the sewing machine drive shaft 6 are transmitted via the link mechanisms 21A, 21B, 21C and 21D to the needle oscillation supporting member and the needle feed corresponding to a fabric feed may be carried out with the good accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine for continuously feeding fabric, and more particularly, to a needle feed sewing machine which feeds a needle in accordance with a cloth feed.

[0002]

2. Description of the Related Art In general, in a household sewing machine, a needle is stabbed into a fabric together with a needle thread when the fabric is stopped, and the needle thread and the lower thread are entangled. When the needle is released from the fabric, the fabric is fed. The fabric is sewn by alternately performing the vertical movement of the needle and the feeding of the fabric.

[0003] On the other hand, a sewing machine having a drive source such as a dedicated motor so as to be driven and controlled separately from the drive of the sewing machine, and having a fabric transport body for transporting the fabric by the drive source, has an inertia and the like. It was difficult to intermittently feed the fabric feed mechanism by the action. For this reason, in such a sewing machine, the cloth is continuously fed.

However, when the fabric is continuously fed,
Since the cloth is fed even when the needle is piercing the cloth, a load is applied to the cloth by the needle at this time, which may adversely affect the quality of the sewn product.

In view of such a point, there is known a needle feed sewing machine which feeds a needle in a cloth feeding direction according to a cloth feeding speed when the needle is pierced by the needle.

As an example of such a needle feed sewing machine, there is a needle feed sewing machine described in JP-A-3-254785.

[0007]

By the way, the conventional needle feed sewing machine described above has various problems due to its configuration.

For example, the needle feed sewing machine described in the above-mentioned publication has a motor for setting a needle feed direction and a motor for setting a needle feed amount, that is, a needle swing amount. Needle feed has been performed through a complicated drive transmission mechanism having a belt and gears.

However, the needle feed sewing machine described in this publication has a drive transmission mechanism having belts and gears that are liable to cause a transmission error. And a complicated drive transmission mechanism, resulting in high costs.

Further, the conventional needle feed sewing machine has a back tack stitch that forms a reverse stitch portion in which the cloth is fed in a direction opposite to the normal stitch portion in order to make it difficult to unravel the seam at the start and end of sewing. When performing the condensation stitching to form the condensed portion of the seam finer than the stitch pitch of the normal stitched portion, after the sewing of the reverse stitch portion or the condensed portion on the sewing start side is completed, the sewing machine is temporarily stopped and then the normal sewing is started. After that, after finishing the normal sewing, the sewing machine is temporarily stopped again, and then the sewing of the reverse stitch portion or the condensed portion on the end side of the sewing is started. That is, when changing at least one of the feed direction of the fabric and the needle feed amount during sewing, it is necessary to suspend the sewing machine to suspend the sewing operation,
There was a problem that productivity was not good.

Therefore, a needle feed sewing machine capable of performing accurate needle feed with a simple configuration, a needle feed sewing machine capable of changing at least one of the cloth feed direction and the needle feed amount during sewing, There is a need for a needle feed sewing machine that can perform accurate needle feed with a simple configuration and can change at least one of the cloth feed direction and the needle feed amount during sewing.

The present invention overcomes the above-mentioned problems in the prior art, and enables accurate needle feeding with a simple configuration, and at least one of the cloth feeding direction and the needle feeding amount. Needle that can be changed during sewing or that can perform accurate needle feeding with a simple configuration and can change at least one of the fabric feeding direction and needle feeding amount during sewing It is intended to provide a feed sewing machine.

[0013]

According to a first aspect of the present invention, there is provided a needle feed sewing machine according to the present invention, wherein the needle feed means comprises a needle swing support member for swingably supporting a needle. A single pulse motor for converting the rotational motion of the sewing machine drive shaft into the oscillating motion of the needle oscillating support member, and the needle oscillating support member according to the rotation angle of the output shaft of the pulse motor. The present invention has a link mechanism for changing the presence or absence of swing, the swing angle, and the swing start direction. By adopting such a configuration, the rotation of the drive shaft of the sewing machine is set by setting the rotation angle of the output shaft of the pulse motor to a certain angle in order to set a desired needle feed direction and needle feed angle. Is transmitted to the needle swing support member via the link mechanism, and needle feeding corresponding to cloth feeding can be performed.

A feature of the present invention according to claim 2 is that a needle mechanism is provided with a crank mechanism for limiting the swing range of the needle swing support member. By adopting such a configuration, the swing range of the needle swing support member can be limited, and even if an abnormal operation occurs in the pulse motor, interference between the components can be prevented. it can.

According to a third aspect of the present invention, there is provided an operation panel for inputting a needle feed amount with respect to a stitch pitch, and a control unit for controlling the needle feed based on the input needle feed amount. And by adopting such a configuration,
The needle feed amount can be arbitrarily set by the operation panel, and an appropriate needle feed amount can be set according to the type of the sewing material.

According to a fourth aspect of the present invention, there is provided a sewing machine driving means for moving a needle up and down, a continuous cloth feeding means for feeding a cloth at a constant speed, and a needle for rocking the needle in a cloth feeding direction and a stitch pitch. A control having a needle feeding means capable of changing at least one of a needle feeding amount and a needle feeding direction, and a sewing program for controlling a sewing machine driving means, a continuous cloth feeding means and a needle feeding means to form a desired stitch on a cloth. And the control unit is configured to control at least one of the feed direction and the needle feed amount of the fabric to be changeable during sewing. By adopting such a configuration, the control unit can control the operation of each unit based on the sewing program and reliably change at least one of the feed direction and the needle feed amount of the fabric during sewing. .

According to a fifth aspect of the present invention, there is provided an input means for inputting a feed direction and a needle feed amount of the cloth, and when the sewing operation is performed, the control unit inputs the feed direction and the needle of the inputted cloth. The point is that the cloth feed and the needle feed are controlled by the feed amount. By adopting such a configuration, an appropriate cloth feeding direction and a needle feed amount can be arbitrarily set by input means for each type of sewing pattern. Sewing of a sewing pattern in which one or both of them changes can be performed easily and reliably.

A feature of the present invention according to claim 6 is that the control unit is provided with a sewing pattern storage unit in which the feeding direction and the needle feed amount of the fabric are stored for each sewing pattern as a part of the sewing pattern. A selection means for selecting a desired sewing pattern from a plurality of sewing patterns stored in the section is provided, and when the sewing operation is performed, the control unit performs, based on the sewing pattern selected by the selection means, the feed direction of the fabric and It is configured to control the needle feed amount. By adopting such a configuration, the feed direction and the needle feed amount of the fabric according to the type of the sewing pattern can be automatically set by executing a simple operation of operating the selection means, and the selected Sewing of the sewing pattern can be automatically executed.

The feature of the present invention according to claim 7 is the feature of claim 4
In any one of claims 6 to 6, the needle feeding means is the needle feeding means according to claim 1. By adopting such a configuration, accurate needle feeding can be performed with a simple configuration, and at least one of the feed direction and the needle feed amount of the fabric is easily and reliably changed during sewing. be able to.

The feature of the present invention according to claim 8 is that of claim 7
, The needle feed means is provided with the crank mechanism according to claim 2. By adopting such a configuration, accurate needle feeding can be performed with a simple configuration, and at least one of the feed direction and the needle feed amount of the fabric is easily and reliably changed during sewing. In addition, the swing range of the needle swing support member can be limited, and even if an abnormal operation occurs in the pulse motor, interference between the components can be prevented.

[0021]

FIG. 1 shows a main part of a needle feed sewing machine according to the present invention. An upper part of one end inside a sewing machine main body 2 provided on a sewing machine bed 1 is provided. A support shaft 3 extending in the horizontal direction is supported. A needle swing support member 4 is supported on the support shaft 3 so that the upper end thereof can swing in the front-rear direction in FIG. The needle swing support member 4 supports a needle bar mechanism 5 composed of a needle bar 58 for attaching a needle 57 serving as a sewing needle, which will be described later, and a needle bar holder, which can move up and down.

An upper shaft 6 which is a sewing machine drive shaft which extends in the horizontal direction and is rotationally driven by a sewing machine drive motor (not shown) is provided in the sewing machine main body 2. A needle bar crank mechanism 7 for converting the rotational movement of the upper shaft 6 into a vertical movement of the needle bar mechanism 5 is provided at the tip of the upper shaft 6 such that the tip thereof is connected to the needle bar mechanism 5. Has been established.

Next, a specific configuration for needle feeding will be described with reference to FIGS.

The outer periphery of the intermediate portion of the upper shaft 6 is a cylindrical surface 9.
The eccentric cam 8 is fixed by a screw 10, and the annular portion 12 of the first crank 11 is fitted to the cylindrical surface 9 of the eccentric cam 8. The first crank 11 has a shaft portion 13, and the annular portion 12 protrudes from one end of the shaft portion 13. A small diameter hole 14 is formed at the other end of the shaft portion 13. The first crank 11 is reciprocated in the longitudinal direction by the rotation of the upper shaft 6.

In the vicinity of the first crank 11, there is provided a first swing member 16 which is swingable about a horizontal shaft 15. The lower end of the first swing member 16 has ,
The first crank 11 is connected to the pin 1 through the small-diameter hole 14.
7 so as to be relatively rotatable. The first swing member 16 has a pair of parallel bearings 1.
8 and 18 are protruded, and these bearing portions 18 and 18 are provided.
The upper end of the rod 19 is rotatably supported by a pin 20 penetrating the bearings 18, 18. Therefore, the rod 19 is swung by the swing of the first swing member 16.
Is reciprocated vertically.

At the lower end of the rod 19, four equal-length links 21A, 21B, 21
One end of each of C and 21D is swingably supported by a common pin 22 penetrating the rod 19. Of the links 21A, 21B, 21C and 21D, the link 21
A, 21B and links 21C, 21D are located on opposite sides of the rod 19 from each other.

In the vicinity of the rod 19, a rotating shaft 23 extending in parallel with the upper shaft 6 is mounted on a pair of brackets 24, 24 formed at intervals in the sewing machine main body 2 with bearings 25, 24. It is rotatably supported via 25 or the like. A second swing member 26 that can rotate together with the rotation shaft 23 is provided on the rotation shaft 23 between the brackets 24, 24.
7. At the top of the second swinging member 26, a connecting portion 28 is protrudingly provided. At the connecting portion 28, the two links 21B and 21C located inside are pivotally pivoted by pins 29. Is being worn.

The tip of the rotation shaft 23 faces the vicinity of the needle swing support member 4.
The swing rod 30 that can swing with the rotation shaft 23 is
It is fixed by 1. A pin 32 extending in parallel with the rotation shaft 23 is fixed to a lower end portion of the swing rod 30 with a screw portion 33 fixed by a nut 34. The pin 32 is provided with the needle swing support member. Square piece 3 fitted to 4
5 is rotatably supported. Therefore, the needle swing support member 4 is also swung by following the swing of the swing rod 30.

In the vicinity of the first swing member 16, a pulse motor 37 for setting the swing start direction of the needle swing support member 4 and the swing amount thereof is supported by a support plate 36. It is arranged. An eccentric cam 39 having an outer periphery as a cylindrical surface 40 is fixed to an output shaft 38 of the pulse motor 37 by a screw 41. The cylindrical surface 40 of the eccentric cam 39 has an annular portion of a second crank 42. 43 are fitted. The second crank 42 has a shaft portion 44, and the annular portion 43 protrudes from one end of the shaft portion 44. A small-diameter hole 45 is formed in the other end of the shaft portion 44.
Are formed. And, the second crank 42,
The output shaft 38 of the pulse motor 37 is moved in the longitudinal direction by a predetermined angle of rotation.

In the vicinity of the second crank 42, a pair of pins 4 arranged in parallel with the upper shaft 6 on a pair of brackets 46, 46 formed at intervals in the sewing machine main body 2.
An intermediate transmission body 48 having a U-shape in a plane supported rotatably by 7, 47 is disposed rotatably. A protrusion 49 is provided on one side of the intermediate transmission body 48,
The second crank 42 is connected to the protrusion 49 via a small-diameter hole 45 so as to be relatively rotatable by a pin 50. Further, the two links 21 located on the outer side are respectively provided at a pair of tip portions of the intermediate transmission body 48.
A and 21D are pivotally connected to each other by a pin 51.

On the other hand, as shown in FIG. 3, the pulse motor 37 is controlled by a control unit 52 such as a CPU for controlling the sewing machine so that its output shaft 38 can be fed by a needle corresponding to the cloth feed. Is rotated by a predetermined angle in the direction of. The sewing machine drive motor 53 for rotating the upper shaft 6 and the cloth feed motor 54 for driving the cloth feed mechanism provided on the sewing machine bed 1 for feeding the cloth in one of forward and reverse directions are provided. It is connected to the controller 52 and is driven by the control of the controller 52. An operation panel 60 is electrically connected to the control unit 52, and a needle feed amount with respect to a stitch pitch can be set from the operation panel 60 according to the type of the sewing material. And the control unit 5
The creation of the needle feed data in 2 may be performed based on the input sewing data, or the operation on the operation panel 60 may be input to the control unit 52.

In FIG. 1, a pulley 55 for transmitting the rotation of the upper shaft 6 to a shuttle (not shown) is mounted on the upper shaft 6, and a belt 56 wound around the pulley 55 is mounted.
The drive is transmitted via the.

Next, the operation of this embodiment having the above-described configuration will be described.

FIG. 4, FIG. 7, and FIG. 10 are views schematically showing an embodiment of the needle feed sewing machine according to the present invention. The dimensions of each member are different from those in FIGS. FIGS. 5, 8 and 11 show the specific states of the respective members when the needle is pierced in accordance with the embodiment shown in FIGS. 1 and 2, corresponding to the schematic views. FIGS. And FIG. 12 is a view showing a specific state of each member when the needle comes off according to the embodiment of FIGS. 1 and 2 corresponding to the schematic view.

FIGS. 4 to 6 show a state in which the needle feed is not performed. In this state, four links 2 whose one end is pivotally connected to the lower end of the rod 19 are shown.
1A, 21B, 21C and 21D, the other end is pin 2
9, two inner links 21B and 21C pivotally attached to the second swinging member 26, and the other end is a pin 51, respectively.
Since the axes of the pins 29 and 51 of the two outer links 21A and 21D pivotally attached to the intermediate transmission body 48 coincide with each other, the rotation of the upper shaft 6 causes the first swing member 16 to rotate.
Swings and lowers the rod 19, the four links 2
1A to 21D simply swing about the pins 29 and 51. Therefore, no external force for rotating the second swing member 26 is generated, and the swing rod 30 for swinging the needle swing support member 4 remains stationary. As a result, the horizontal position of the sewing needle 57 in FIGS. 5 and 6 does not change.

FIGS. 7 to 9 show a state in which the needle feed is performed in the forward direction. The pulse motor 37 is driven by a control signal from the control unit 52 (FIG. 3) so as to be synchronized with the cloth feed. Then, the output shaft 38 of the pulse motor 37 shown in FIG. 2 is rotated by a predetermined angle in a predetermined direction, and the second crank 42 is moved in a longitudinal direction thereof in a direction in which the intermediate transmission body 48 is pulled. Then, the intermediate transmission body 48 is rotated counterclockwise about the pair of pins 47, 47 in FIG. 2, and is turned from the state of FIG. 4 by the angle θ in FIG. In this state, one end is connected to the rod 19
Links 21A to 21D pivotally attached to the lower ends of the
Of the two links, the other two inner links 21B and 21C pivotally connected to the second swinging member 26 by the pin 29, and the other end pivotally connected to the intermediate transmission body 48 by the pin 51, respectively. Pin 2 with the two outer links 21A, 21D
9 and the axis of the pin 51 are located at different positions, and the pin 5 which is the center of rotation of the two outer links 21A and 21D.
1 shows that the driving of the pulse motor 37 is stopped in this state, so that it takes a fixed position, whereas the center of rotation of the two inner links 21B and 21C is on the rotatable second swinging member 26. , It can move.

For this reason, when the first swinging member 16 swings from the solid line position to the broken line position in FIG. 7 with the rotation of the upper shaft 6, the two outer links 21A and 21D are brought into the fixed position by the pins 51. , The lower end of the rod 19 also swings about the pin 51, and assumes an inclined position so as to be located on the right side of the upper end in FIG.
Then, the two inner links 21B and 21C pivotally attached to the rod 19 move so as to be pushed rightward in FIG. Therefore, the second swing member 26
Is pivoted clockwise in FIG. 7, and as a result, the pivot rod 30 for pivoting the needle pivot support member 4 is pivoted,
The needle swing support member 4 is swung. The first swinging member 16 repeats swinging between the solid line position and the broken line position in FIG. 7 with the rotation of the upper shaft 6, so that the needle supported by the needle swinging support member 4. Moves in the same direction as the fabric feed at the same speed as the fabric feed in the state of piercing the fabric, and moves in the opposite direction to the fabric feed in the state of falling out of the fabric. That is, the position changes from the solid line position to the broken line position at a cycle of about 1/2 of one rotation of the upper shaft 6, and moves from the broken line position to the solid line position at almost the same cycle. Accordingly, as shown in FIGS. 8 and 9, the tip of the needle 57 draws an elliptical locus.

FIGS. 10 to 12 show a state in which the needle is fed in the reverse direction. The pulse motor 37 is synchronized with the cloth feed by a control signal from the control unit 52 (FIG. 3). 2 to rotate the output shaft 38 of the pulse motor 37 shown in FIG.
The crank 42 is moved in the longitudinal direction in a direction to push the intermediate transmission body 48. Then, the intermediate transmitter 48 is moved to the position shown in FIG.
In FIG. 10, it is rotated clockwise about a pair of pins 47, 47, and is turned from the state of FIG. 4 by the angle θ in FIG. Then, the needle swing support member 4 can be swung so that the swing start direction is opposite to that in FIG. Therefore, as shown in FIGS. 11 and 12, the tip of the needle 57 draws an elliptical trajectory in the opposite direction to FIGS.

Using the above configuration, for example, the control unit 5
2, first, the fabric is sent from left to right in FIGS. 5, 6, 8, 9, 11, and 12 to perform reverse stitching, the sewing machine is stopped, and then the fabric is sent from right to left to perform normal sewing. It can also be controlled to do so. That is, when the reverse stitching is started, as shown in FIGS. 11 and 12, the needle 57 rotates so as to draw an elliptical locus in a counterclockwise rotation, and the needle feed is performed following the cloth feed. The needle feed amount at this time is input in advance through the operation panel 60, and the pulse motor 37 is driven by a predetermined rotation angle according to the input value. When the reverse sewing is completed, the sewing machine is temporarily stopped, and when the normal sewing is started, the needle 57 is rotated clockwise to draw an elliptical locus as shown in FIGS. The needle feed is performed following the above. The needle feed amount at this time is input in advance through the operation panel 60, and the pulse motor 37
It is driven by a predetermined rotation angle by this input value.
Thus, in the present embodiment, the pulse motor 37
Is automatically controlled by the control unit 52, so that the cloth feed amount can be easily switched even during one cycle of sewing.

As described above, according to the needle feed sewing machine of the present embodiment, needle feed corresponding to cloth feed can be performed, and a load of a needle does not act on the cloth. Obtainable. Also, in some cases,
It is also possible to control so as not to perform the needle feed.

On the other hand, the needle feed sewing machine of the present embodiment does not use gears or belts, so that accurate needle feed without errors can be performed. Further, since the needle feed sewing machine of the present embodiment uses the crank mechanism, the swing range of the needle swing support member 4 can be limited, and the pulse motor 37 prevents the abnormal operation from interfering with each part. can do.
Furthermore, it can be manufactured at a low cost by a simple configuration using only a single pulse motor 37.

Next, another embodiment of the needle feed sewing machine according to the present invention will be described.

FIGS. 13 to 17 show another embodiment of the needle feed sewing machine according to the present invention. FIG. 13 is a perspective view showing a main part of the whole structure, and FIG. 14 is a structure of a main part of the sewing machine main body. FIG. 15 is a block diagram showing a control system, FIG. 16 is a plan view showing a main part of the operation panel together with an initial screen, and FIG. 17 is a plan view showing a main part of the operation panel together with a detailed screen.

The needle feed sewing machine according to the present embodiment automatically performs decorative stitching such as a bead (split ball) on a pocket opening of slacks, a jacket, work clothes and the like, and a mounting opening of a zipper such as a jumper and a duvet cover. It can be applied.

As shown in FIG. 14, the needle feed sewing machine of this embodiment has a sewing machine main body 71 having two needles 57, a cloth feed means 72 as a continuous cloth feed means for feeding cloth at a constant speed, and a ball. Cloth folding means 73.

The sewing machine body 71 performs sewing in a state in which a ball cloth (both not shown) is superimposed on a body cloth as a cloth, and the sewing machine body 71 provided on the sewing machine bed 74 is sewn. As shown in FIG. 14, a needle bar mechanism 5 similar to the needle feed sewing machine of the above-described embodiment, an upper shaft 6 serving as a sewing machine drive shaft, and a sewing machine driving motor 53A for rotatingly driving the upper shaft 6 as sewing machine driving means. (FIG. 15), needle bar crank mechanism 7, needle feed means for needle feed capable of swinging needle 57 in the cloth feed direction and changing at least one of the needle feed amount and the needle feed direction with respect to the stitch pitch. The needle swing support member 4 for swingably supporting the needle 57 described above, a single pulse motor 37 for converting the rotational movement of the upper shaft 6 into the swing movement of the needle swing support member 4, and this pulse Motor 3 Output shaft link mechanism 21A for changing respectively the presence and the swinging angle and the swing start direction of the swing of the needle swing support member 4 in accordance with the rotation angle of 38, 21B of,
21C, 21D and the like are provided. Furthermore, upper shaft 6
A needle bar crank mechanism 7 for converting the rotational movement of the upper shaft 6 into a vertical movement of the needle bar mechanism 5 is connected to a tip of the needle bar crank mechanism 7.

The configuration of these needle feeding means is the same as the configuration of the needle feeding means of the embodiment of the needle feeding sewing machine according to the present invention described above, and the detailed description of the configuration and operation will be omitted.

The configuration of the needle feeding means may be any as long as the needle 57 can be swung in the cloth feeding direction and at least one of the needle feeding amount and the needle feeding direction with respect to the stitch pitch can be changed. In particular, it is not limited to the configuration of the needle feeding means of the present embodiment.

Returning to FIG. 13, the cloth feeding means 72
Is provided with a pair of cloth holding parts 76 for holding the ball cloth on the body cloth at the tip end thereof, and these cloth holding parts 76 are a forward / reverse rotatable servomotor or pulse motor. Cloth feed motor 54A (FIG. 1)
With the driving force of 5), the sewing table 77 is
At the sewing position P2 where sewing is performed on both cloths from the set position P1 where both cloths on the upstream side in the sewing direction are set as indicated by imaginary lines.
Corner knife position P on the downstream side in the corner sewing direction through
3 is provided so as to be able to reciprocate and move up and down along the sewing direction indicated by the arrow in FIG. In addition, each of the cloth holding portions 76 is provided with a folding plate 78 having both functions of holding and folding the ball cloth.
Reference numeral 8 is provided so as to be individually movable in a direction orthogonal to the sewing direction by a driving force of an actuator such as an air cylinder (not shown). In other words, it is formed so as to be freely movable toward and away from the cloth presser foot 79 of the below-described blanket folding means 73 at the set position.

The blanket folding means 73 has a fabric presser foot 79 having an inverted T-shaped cross section which can be lowered onto the blanket.
The cloth presser foot 79 is disposed so as to be able to move up and down at a set position P1 on the sewing table 77 with a driving force of an actuator such as an air cylinder (not shown).

Further, the center knife 8 is located at the sewing position P1.
Numeral 0 is provided so as to be able to move up and down with the driving force of an actuator such as an air cylinder (not shown). At the corner knife position P3, two corner knives 81 are provided at intervals in the sewing direction. It is arranged to be able to move up and down with driving force.

On the other hand, as shown in FIG. 15, a control unit 82 for controlling the sewing machine includes at least a CPU 83,
And a memory 84 formed of ROM, RAM or the like having an appropriate capacity. The control unit 82 is electrically connected to various switches such as a pulse motor 37, a sewing machine driving motor 53A, a cloth feed motor 54A, an operation panel 85, an origin sensor 86, a power switch (not shown), and a sewing start switch. ing. The sewing machine driving motor 53A that rotates the upper shaft 6 has a function as a sewing machine driving unit that moves the needle 57 up and down.

The origin sensor 86 comprises, for example, an encoder or the like, and detects the origin position of the pulse motor 37, more specifically, the reference position of the rotation angle and the rotation direction of the output shaft 38 of the pulse motor 37. Thus, the detection signal can be sent to the control unit 82. And
The control unit 82 controls the number of input pulses for driving the output shaft 38 of the pulse motor 37 and the direction of rotation of the output shaft 38 based on the detection signal input from the origin sensor 86, so that the needle feed amount and the The direction can be controlled.

As shown in FIGS. 16 and 17, the operation panel 85 has at least display means 87, display item selection means 88, input means 89, reset switch 90,
A ready switch 91, a ready light 92, and the like are provided.

The display means 87 is formed of, for example, a touch panel. The display section 87A has an initial screen at power-on as shown in FIG. 16 and a sewing pattern, needle feed direction, and needle shown in FIG. Feed amount, fabric feed direction,
A detailed screen on which input (setting), change, and selection of a seam pitch and the like can be executed can be switched.

On one of the initial screens, as shown in FIG. 16, a pictorial symbol 87 of a pattern number representing the type of sewing pattern such as back tack sewing and condensed sewing is provided.
a, a pictorial symbol 87b representing a sewing pattern and the like can be displayed, and various error displays are possible. The pictorial symbol 87b of the present embodiment can be displayed together with a numerical value of the sewing length.

On the other detail screen, as shown in FIG. 17, a pictorial symbol 87a of a pattern number representing the type of sewing pattern and sewing conditions (data) are displayed. For example, a pictorial symbol 87ba indicating the feed direction and needle feed of the fabric when used for sewing that sends the fabric in the opposite direction to the normal sewing on the sewing start side required when performing back tack sewing, the needle feed amount, A pictogram 87bb representing the feed direction and needle feed of the fabric when used for sewing to send the fabric in the reverse direction to the normal sewing on the sewing end side necessary for performing the tack sewing, and the needle feed amount, used for the normal sewing. The pictogram 87bc indicating the feed direction of the fabric and the needle feed at the time, the needle feed amount thereof, and the time required for performing the condensed sewing. The symbol 87bd indicating the feed direction of the fabric and the needle feed, the needle feed amount, and the like can be displayed.

In the display of the needle feed amount, the value of the needle feed amount itself may be displayed as a numerical value. However, it is necessary to treat the needle feed amount as a percentage of the stitch pitch. This is preferable in that the ratio of the stitch pitch does not need to be changed when the stitch pitch is changed.

The items to be displayed on the initial screen and the detail screen may be set as required according to the design concept and the like, and are not particularly limited to the configuration of the present embodiment.

Further, the display means 87 allows the picture display portion of the item selected by the display item selection means 88 to be easily visually recognized by blinking or the like.

The display item selecting means 88 includes the display means 8
7 is used to switch the display items displayed on the display 7 and has four direction keys 88a arranged in a cross shape. Each time the upward direction key 88a is pressed once, the display part blinking on the display means 87 moves to the display part of the item adjacent to the upper side, and each time the right direction key 88a is pressed once. The display part blinking on the display means 87 moves to the display part of the item adjacent to the right, and the display part blinking on the display means 87 each time the downward direction key 88a is pressed once. Moves to the display part of the item adjacent to the lower part, and every time the left direction key 88a is pressed once, the display part blinking on the display means 87 moves to the display part of the item adjacent to the left. It is supposed to. Further, the display item selecting means 88 of the present embodiment is also used for inputting a needle feed amount with respect to a fabric feed direction and a stitch pitch according to a sewing pattern, as described later.

The input means 89 includes numerical keys of 0 to 9 used for inputting at least the needle feed amount with respect to the stitch pitch, and + and-symbols used for inputting a feed direction of the fabric according to the sewing pattern. And a total of 12 input keys 89a.

That is, the input means 89 of this embodiment is
The feed direction and the needle feed amount of the fabric can be input.

The input means 89 of this embodiment has a function as a selection means 93 for selecting a sewing pattern necessary for a sewing operation to be executed from a plurality of sewing patterns stored in the memory 84, as described later. Has both.

The preparation completion switch 91 is turned on and used when executing a sewing operation.

The ready indicator light 92 is turned on when the ready switch 91 is turned on, so that the ready state can be easily visually recognized by the operator. It is formed by LEDs.

Returning to FIG. 15, the memory 84 has at least a sewing pattern storage section 94 and a program storage section 95.
And

One sewing pattern storage section 94 stores sewing data necessary for sewing such as a pattern number indicating a plurality of sewing patterns, a feed direction of the fabric, and a needle feed amount with respect to a stitch pitch. ing. That is, in the sewing pattern storage unit 94, the needle feed amount with respect to the cloth feeding direction and the stitch pitch is stored for each sewing pattern as a part of the sewing pattern. In the present embodiment, a plurality of sewing patterns are stored in advance together with the pattern numbers.

The other program storage section 95 stores sewing programs as various control programs for controlling the operation of the sewing machine. This program storage unit 9
When executing the sewing operation, the sewing program stored in the sewing program 5 stores the needle feed amount set by the input from the operation panel 85 or the needle feed amount of the sewing pattern selected from the operation panel 85. Is controlled so as to correspond to the fabric feed, and the needle feed amount is set to an appropriate amount according to the type of the fabric, or one or both of the feed direction and the needle feed amount of the fabric are changed during sewing. According to the type of sewing pattern, an appropriate cloth feeding direction and needle feed amount can be set, and sewing of a selected sewing pattern can be automatically executed.

Note that each of the storage units 94 and 95 can be constituted by areas having different addresses of one element or individual elements.

Here, an example of the needle feed data input by the configuration of the control unit 82 and the operation panel 85 will be described.

FIG. 18 is a flow chart showing an example of data input for needle feed.

As shown in FIG. 18, the data input for the needle feed of the needle feed sewing machine of this embodiment is started by turning on the power by turning on a power switch (not shown).
Then, in step ST01, it is determined whether or not to change the pattern number representing the type of the sewing pattern on the initial screen displayed on the display section 87A of the display means 87 of the operation panel 85 shown in FIG.

It should be noted that the pattern number on the initial screen may be the first of the pattern numbers or may be the pattern number selected when the power was last turned off. It can be set as required.

If the determination in step ST01 is NO (the pattern number is not changed), the process proceeds to step ST02, where it is determined whether or not the ready switch 91 is ON. If the determination in step ST02 is NO (the ready switch is not changed). 91 is OF
In the case of F), the process waits until the determination of step ST02 becomes YES, and when the determination of step ST02 is YES, the process proceeds to step ST03 to enter the execution mode of the sewing operation in the displayed pattern. .

When the ready switch 91 is ON, the ready indicator light 92 is turned on. The execution of the sewing operation is started by turning on a sewing start switch (not shown).

If the determination in step ST01 is YES (the sewing pattern is changed), the process proceeds to step ST04, where the pattern number (pictogram 87a) to be changed is displayed on the display section 87A of the display means 87 of the operation panel 85. It is determined whether or not the display is being performed. If the determination in step ST04 is NO (the pattern number to be changed is not displayed), the process proceeds to step ST04.
Proceeding to 05, input the desired pattern number by operating the input key 89a of the operation panel 85, and return to step ST04.

If the determination in step ST04 is YES (the pattern number to be changed is being displayed), in the next step ST06, the display of the display section 87A of the display means 87 of the operation panel 85 is set to a detailed screen, and Step ST
Proceed to 07.

The switching of the initial screen to the detailed screen is performed, for example, by using the downward key 7 of the display item selecting means 88.
This is performed by operating 3a.

In the case where the detailed screen is set in step ST06, the sewing data corresponding to the pattern number is displayed together with pictorial symbols.

That is, the input means 89 also functions as a selection means 93 capable of selecting a sewing pattern required for a sewing operation to be executed from a plurality of sewing patterns stored in the memory 84.

Then, in step ST07, it is determined whether or not the data input for the needle feed has been completed. If YES (data input has been completed), the process returns to step ST02.

If the determination in step ST07 is NO (execute data input), the determination in step ST07 is Y
Until ES, the process proceeds to the next step ST08 to execute the data input mode of the needle feed data.

Here, a specific example of the needle feed data input mode will be described.

First, a specific example of the data input mode of the needle feed will be described by exemplifying back tack sewing.

FIG. 19 is an explanatory diagram showing back tack sewing.

As shown in FIG. 19, back tack sewing, which is a kind of decorative sewing, is a sewing pattern for making it difficult to unravel the seam at the start and end of sewing in sewing of a bead. A reverse stitch portion SBS (shown exaggerated in FIG. 19) in which sewing is performed while feeding a fabric in a direction opposite to sewing, a normal sewing portion SS in which lock stitching is performed, and normal sewing at the end of sewing are described. Reverse stitch portion EB where sewing is performed while sending fabric in the reverse direction
S.

The setting of the data input for the needle feed in the back tack sewing is performed on the detailed screen shown in FIG.
While the pattern number 87a having the pattern number representing the back tack sewing, for example, the numerical value 1 is displayed, the direction key 88a of the display item selecting means 88 is operated to select the pictogram 87ba representing the reverse stitch portion SBS. Start by blinking the display.

Next, with the pictorial symbol 87ba blinking, the input key 89a of the input means 89 is operated to
The reverse feed needle swing amount, which is the needle feed amount with respect to the stitch pitch on the sewing start side, is input as, for example, -70%. At this time, the value of the needle feed amount itself may be displayed as a numerical value,
It is preferable to treat the needle feed amount as a percentage of the stitch pitch in the sense that the ratio of the needle feed amount to the stitch pitch can always be kept constant, and that the needle feed amount data does not need to be changed when the stitch pitch changes. .

The sign of-(negative) of the value of -70% is as follows:
The direction of the needle feed, that is, the direction of the cloth feed is performed in a direction opposite to that of the normal sewing section SS, whereby the feed direction of the cloth is input (set). Further, the + (positive) sign indicates that the direction of the fabric feed, which is the direction of the needle feed, is performed in the same forward direction as the normal sewing section SS. Therefore, the input key 89 of the input means 89
By operating the + and-symbol keys of a, the feed direction of the cloth, more specifically, the rotation direction of the cloth feed motor 54A can be input.
Of these, the + and-symbol keys also function as input means for inputting the cloth feeding direction according to the sewing pattern.

Next, the directional key 88a of the display item selecting means 88 is operated to select the pictogram 87bb representing the reverse stitch portion EBS and blink it. And pictogram 8
In the state where 7bb is blinking, the input key 89a of the input means 89 is operated, and in the same manner as the reverse feed needle swing amount at the sewing start side, the reverse feed needle swing as the needle feed amount with respect to the stitch pitch at the sewing end side is performed. Enter the amount, for example, -40%.

Next, the direction key 88a of the display item selecting means 88 is operated to display the pictogram 8 representing the normal sewing portion SS.
7bc is selected and blinked. And the pictogram 87
While bc is blinking, the input key 89a of the input means 89 is operated to input the forward feed needle feed amount during normal sewing as + 60% in the same manner as the reverse feed needle swing amount at the sewing start side. End data entry.

The needle feed amounts input by the above operations are stored in the sewing pattern storage section 94 of the memory 84 together with the sewing pattern numbers.

The direction of rotation of the pulse motor 37 is set according to the sign of the input of the needle feed amount, and the number of input pulses for driving the pulse motor is calculated and set based on the numerical value displayed in percent.

The data input includes not only the needle feed amount but also the operation of the direction key 88a of the display item selecting means 88 to select various pictograms (not shown) displayed on the detailed screen, and to select the selected pictograms. Is input by operating the input key 89a of the input means 89 to input, for example, the number of back tack stitches, the stitch pitch, and the like. The direction of the cloth feed in each of the reverse stitch portions SBS and EBS is executed by rotating the rotation direction of the cloth feed motor 74 in a direction opposite to the normal sewing section SS.

In the present embodiment, data stored in the sewing pattern storage unit 94 in advance is displayed together with a pictorial symbol along with a pattern number representing back tack sewing on the detailed screen. With this input, the data stored in the sewing pattern storage unit 94 is overwritten and changed. Therefore, when inputting data completely new, on the initial screen, select a new pattern number in which all data is not stored, or select a pattern number in which only data of the needle feed amount is not stored. Good to do.

Next, a specific example of the data input mode of the needle feed will be described by exemplifying the condensation sewing.

FIG. 20 is an explanatory diagram showing condensed stitching.

As shown in FIG. 20, the condensation stitch is
This is a sewing pattern for making it difficult to unravel the seam at the start and end of sewing in sewing of a bead. The stitch pitch of the condensed portion SOS at the start of sewing and the condensed portion EOS at the end of sewing are, for example, 1.0 mm. Stitch pitch of normal sewing part SS, for example, 2.5m
The sewing of a seam smaller than m is executed.

The setting of the needle feed data input in the condensed stitching is displayed in a state where a pattern number representing the condensed stitching, for example, a pictorial symbol (not shown) having a numerical value of 2, is displayed on the detailed screen shown in FIG. The operation is started by operating the direction key 88a of the item selecting means 88 to select the pictorial symbol 87bc representing the normal sewing portion SS and blinking it.

Then, while the pictorial symbol 87bc is blinking, the input key 89a of the input means 89 is operated to
Similarly to the input of the needle feed amount data, the forward feed needle swing amount as the needle feed amount with respect to the stitch pitch of the normal sewing part SS is input as, for example, + 60%.

Next, the direction key 88a of the display item selecting means 88 is operated to select and flash the pictorial symbol 87bd representing the condensed portion SOS on the sewing start side and the condensed portion EOS on the sewing end side. Then, while the pictogram 87bd is blinking, the input key 89a of the input means 89 is operated, and the forward feed needle swing amount as the needle feed amount with respect to the stitch pitch of the normal sewing portion SS is set to +90, for example.
Enter% to end data entry.

The input needle feed amount is stored in the memory 8.
4 is stored in the sewing pattern storage unit 94.

The condensing portion SOS at the sewing start side
The condensed stitch pitch of the condensed portion EOS may be different from that of the condensed portion EOS on the sewing end side.
In this case, a pictorial symbol representing the condensed portion SOS at the sewing start side and a pictorial symbol representing the condensed portion EOS at the sewing end side may be provided separately. Others are the same as the data input of the back tack sewing.

The sewing pattern storage section 94 of the memory 84
FIG. 21 shows an example of the contents of the data structure stored in the.

An example of the relationship between the fabric feeding operation and the needle feeding operation in the back tack sewing is shown in the timing chart of FIG.

An example of the relationship between the cloth feeding operation and the needle feeding operation in the condensed stitching is shown in the timing chart of FIG. In this condensation sewing, the needle 57
The pulse motor 37 is driven at the timing when the needle comes off the fabric to switch the needle feed amount. Specifically, the needle position is detected using a known needle position detecting device, and the change of the needle feed amount is completed before the needle comes off the fabric and pierces the fabric next.

Although the data input of the needle feed has been described by exemplifying the back tack sewing and the condensed sewing as the types of the sewing patterns, the data input of various sewing patterns requiring the needle feed can also be executed.

Next, the operation of the present embodiment having the above-described configuration will be described.

In the automatic sewing apparatus with a needle feed function according to the present embodiment, a cloth (not shown) is set at a predetermined angle at a set position P1 on a sewing table 77 shown in FIG. Then, the fabric presser 76 of the fabric feeding means 72 in a standby state is lowered and pressed, and a cloth (not shown) serving as a cloth is overlapped with a predetermined position on the body cloth to set the cloth. After that, the fabric presser foot 79 of the edge cloth folding means 73 waiting above the set position is lowered to press the ball cloth from above, and then both the folding plates 78 are brought closer to the fabric presser foot 79. It is made to protrude and the blanket is clamped in an inverted T-shaped cross section.

[0111] Then, the cloth feed motor 5 is placed on the body cloth while the cloth is overlapped on the body cloth and the cross section is maintained in an inverted T-shape.
4 is driven to leave both the presser foot 79 at the set position P1 and the both cloths together with the presser foot 76 and the folding plate 78 from the set position P1 to the sewing position P2 under the needle of the sewing machine body 71.
And the sewing machine driving motor 53A is driven to perform sewing, thereby forming a stitch. At this time, the sewing pattern set by the input means 89 or selected by the selection means 93, the rotation direction and the rotation speed of the cloth feed motor 54A for determining the sewing pitch and the cloth feed direction, the needle feed direction and The controller 82 controls each part according to conditions necessary for the sewing operation, such as the rotation angle of the rotation shaft 38 of the pulse motor 37 that determines the needle feed amount, to sew desired stitches such as back tack sewing and condensed sewing. Execute.

At this time, when the back tack sewing is executed, the cloth feed motor 54A and the pulse motor 37 are driven at the timing when the needle 57 comes off the cloth when the sewing of the reverse stitch portion SBS on the sewing start side is completed. By doing so, the sewing direction of the normal sewing section SS can be continuously started by changing the feed direction of the cloth and the needle 57 without stopping the sewing machine. When the sewing of the normal sewing section SS is completed, the cloth feed motor 54A and the pulse motor 37 are driven at the timing when the needle 57 comes off the cloth, so that the cloth and the needle 57 can be fed without stopping the sewing machine. The sewing of the reverse stitch portion EBS on the sewing end side can be continuously started by changing the direction.

When the condensed sewing is executed, the sewing machine is stopped by driving the pulse motor 37 at the timing when the needle 57 comes off the cloth when the condensed portion SOS on the sewing start side is finished. It is possible to continuously start the sewing of the normal sewing section SS by changing the needle feed amount without causing the sewing. Then, even when the sewing of the normal sewing section SS is completed, the pulse motor 37 is driven at the timing when the needle 57 comes off the cloth, so that the needle feed amount is changed without stopping the sewing machine and the sewing is continuously performed. Sewing of the condensed portion EOS on the end side can be started.

That is, at least one of the feed direction of the fabric and the needle feed amount can be changed easily and surely without temporarily stopping the sewing machine during sewing. Therefore, the feed direction of the fabric and the needle during sewing can be changed. Sewing of a sewing pattern in which one or both of the feed amounts changes can be performed easily and reliably, and the sewing time of one cycle of the sewing pattern can be shortened to improve productivity.

The operation relating to the change of the cloth feed direction, the needle feed direction and the needle feed amount itself is the same as that of the needle feed sewing machine of the above-described embodiment except that the sewing machine is not stopped, and a detailed description thereof will be omitted. I do.

Simultaneously with the start of sewing, the space between the stitches formed by the needles 57 is cut open by raising the center knife 80 to form a bead hole. After this sewing / cutting, the cloth presser 76 and the folding plate 78 are conveyed to the corner knife position P3 while holding both the cloths, and then the corner knife 81 rises to cut the corners of the bead hole and cut the bead. Is automatically completed.

As described above, according to the needle feed sewing machine of the present embodiment, the operation of each part is controlled based on the sewing program to change at least one of the cloth feed direction and the needle feed amount during sewing. Can be.

Further, according to the needle feed sewing machine of this embodiment, an appropriate cloth feed direction and needle feed amount can be arbitrarily set by the input means 89 for each type of sewing pattern. An appropriate cloth feeding direction and needle feed amount can be set, and sewing of a sewing pattern in which one or both of the cloth feeding direction and the needle feed amount changes during sewing can be performed easily and reliably.

Further, according to the needle feed sewing machine of this embodiment, by executing a simple operation of operating the selecting means, the feed direction and the needle feed amount of the cloth according to the type of the sewing pattern are automatically set. It can be set and the sewing of the selected sewing pattern can be automatically executed. In other words, the sewing operation of a sewing pattern in which one of the fabric feeding direction, the needle feeding direction, the needle feeding amount, and the stitch pitch changes during sewing is continuously and automatically performed as a series of sewing operations in one cycle from the beginning to the end. Can be easily implemented.

Further, according to the needle feed sewing machine of the present embodiment, the needle feed means capable of swinging the needle in the cloth feed direction and changing at least one of the needle feed amount and the needle feed direction with respect to the stitch pitch. Since the needle feeding means of the needle feeding sewing machine of the above-described embodiment is used, accurate needle feeding can be performed with a simple configuration. At the same time, at least one of the feed direction and the needle feed amount of the fabric can be easily and reliably changed during sewing, and the swing range of the needle swing support member can be limited by the crank mechanism. Even if an abnormal operation occurs in the pulse motor, it is possible to prevent interference between the components. That is, the needle feed corresponding to the cloth feed can be performed, and the load of the needle does not act on the cloth, so that a high quality sewn product can be obtained. In some cases, it is also possible to control so as not to perform the needle feed. Further, since no gears or belts are used, accurate needle feed without errors can be performed. In addition, since the crank mechanism is used, the swing range of the needle swing support member 4 can be limited, and interference between the abnormally operating components of the pulse motor 37 can be prevented. Furthermore, it can be manufactured at a low cost by a simple configuration using only a single pulse motor 37.

Note that the present invention is not limited to the above-described embodiments, and various changes can be made as necessary.

[0122]

As described above, according to the needle feed sewing machine of the present invention, accurate needle feed can be performed with a simple configuration.

That is, the needle feed means includes a needle swing support member for swingably supporting the needle, and a single pulse for converting the rotational movement of the sewing machine drive shaft into the swing movement of the needle swing support member. It has a motor and a link mechanism for changing the presence / absence of swing of the needle swing support member and the swing angle and swing start direction according to the rotation angle of the output shaft of the pulse motor. By setting the rotation angle of the output shaft of the pulse motor to a certain angle corresponding to the desired needle feed direction and needle feed angle, the rotation of the sewing machine drive shaft is rotated by the needle swing support member via the link mechanism. The needle feed corresponding to the fabric feed can be performed with high accuracy.

Further, by providing the needle feed means with a crank mechanism for limiting the swing range of the needle swing support member, the swing range of the needle swing support member can be limited. Even if an abnormal operation occurs in the pulse motor, it is possible to prevent interference between the components.

Further, it has an operation panel for inputting a needle feed amount with respect to the stitch pitch and a control unit for controlling the needle feed based on the input needle feed amount, so that the needle feed amount can be arbitrarily set by the operation panel. Therefore, the appropriate needle feed amount can be set according to the type of the sewing material.

According to the needle feed sewing machine of the present invention, at least one of the cloth feed direction and the needle feed amount can be reliably changed during sewing.

That is, a sewing machine driving means for moving the needle up and down, a continuous cloth feeding means for feeding the cloth at a constant speed, and a needle which swings the needle in the cloth feeding direction and which is included in the needle feeding amount and the needle feeding direction with respect to the stitch pitch. Needle feed means at least one of which can be changed, a sewing machine driving means, a continuous cloth feed means and a control unit having a sewing program for controlling the needle feed means to form a desired seam on the fabric, the control unit, The control unit is configured to control at least one of the feed direction of the fabric and the needle feed amount so as to be changeable during sewing, so that the control unit controls the operation of each unit based on a sewing program to control the feed direction of the fabric. At least one of the needle feed amount and the needle feed amount can be reliably changed during sewing.

An input means for inputting the cloth feeding direction and the needle feed amount is provided, and when executing the sewing operation, the control unit performs the cloth feeding and the needle feed in the input cloth feeding direction and the needle feeding amount. Since it is configured to control, it is possible to arbitrarily set the feed direction and the needle feed amount of the fabric for each type of sewing pattern by the input means. Sewing of a sewing pattern in which both of them change can be performed easily and reliably.

Furthermore, the control section is provided with a sewing pattern storage section in which the feed direction and the needle feed amount of the fabric are stored for each sewing pattern as a part of the sewing pattern, and a plurality of sewing patterns stored in the sewing pattern storage section are provided. Selecting means for selecting a desired sewing pattern from the control means, and when executing the sewing operation, the control unit controls the feed direction and the needle feed amount of the cloth based on the sewing pattern selected by the selecting means. By performing a simple operation of operating the selection means, the cloth feed direction and needle feed amount according to the type of sewing pattern can be set automatically, and the sewing of the selected sewing pattern is automatically performed. Can be performed.

Further, by using the needle feed means of the needle feed sewing machine according to the first aspect of the present invention, it is possible to carry out accurate needle feed with a simple structure, and at the same time, the feeding direction of the cloth and the needle. At least one of the feed amounts can be easily and reliably changed during sewing.

Further, by providing the needle feeding means with the crank mechanism described in claim 2, accurate needle feeding can be performed with a simple configuration, and at least one of the feeding direction of the fabric and the needle feeding amount. One of them can be easily and reliably changed during sewing, and the swing range of the needle swing support member can be limited. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a needle feed sewing machine according to the present invention.

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a block diagram showing a control system in the embodiment of FIG.

FIG. 4 is a schematic diagram showing a state when needle feeding is not performed in the embodiment of FIG. 1;

5 is an enlarged left side view of FIG. 1 showing a specific state of each part at the time of needle sticking of FIG. 4;

FIG. 6 is an enlarged left side view of FIG. 1 showing a specific state of each part at the time of needle removal in FIG. 4;

FIG. 7 is a schematic diagram showing a state in which forward needle feeding is performed in the embodiment of FIG. 1;

8 is an enlarged left side view of FIG. 1 showing a specific state of each part at the time of needle sticking of FIG. 7;

9 is an enlarged left side view of FIG. 1 showing a specific state of each part at the time of needle removal in FIG. 7;

FIG. 10 is a schematic diagram showing a state when performing a reverse needle feed in the embodiment of FIG. 1;

11 is an enlarged left side view of FIG. 1 showing a specific state of each component at the time of needle sticking of FIG. 10;

12 is an enlarged left side view of FIG. 1 showing a specific state of each part at the time of needle removal in FIG. 10;

FIG. 13 is a perspective view showing a main part of an overall configuration of another embodiment of the needle feed sewing machine according to the present invention.

FIG. 14 is a schematic view showing a structure of a main part of a sewing machine main body in the embodiment of FIG. 13;

FIG. 15 is a block diagram showing a control system in the embodiment of FIG.

16 is a plan view showing a main part of the operation panel in the embodiment of FIG. 13 together with an initial screen.

FIG. 17 is a plan view showing a main part of the operation panel in the embodiment of FIG. 13 together with a detailed screen.

18 is a flowchart showing an example of data input for needle feed in the embodiment of FIG.

FIG. 19 is an explanatory diagram showing back tack sewing in the embodiment of FIG. 13;

FIG. 20 is an explanatory diagram showing condensation stitching in the embodiment of FIG. 13;

FIG. 21 is an explanatory diagram showing an example of the contents of a data configuration stored in a sewing pattern storage unit in FIG. 14;

22 is a timing chart showing an example of a relationship between a fabric feeding operation and a needle feeding operation during back tack sewing in the embodiment of FIG. 13;

23 is a timing chart showing an example of a relationship between a fabric feeding operation and a needle feeding operation at the time of condensation sewing in the embodiment of FIG. 13;

[Explanation of symbols]

1, 74 sewing machine bed 2, 71 sewing machine main body 4 needle swing support member 5 needle bar mechanism 6 upper shaft 7 needle bar crank mechanism 8, 39 eccentric cam 11 first crank 16 first swing member 19 rod 21A, 21B, 21C , 21D link 26 second swing member 30 swing rod 35 square piece 37 pulse motor 38 output shaft of pulse motor 37 42 second crank 48 intermediate transmission body 52, 82 control unit 53, 53A sewing machine drive motor 54, 54A Motor 57 Needle 58 Needle bar 60, 85 Operation panel 72 Cloth feeding means 73 Cloth folding means 83 CPU 84 Memory 87 Display means 87A Display section 87a, 87b, 87ba, 87bb, 87bc, 87
bd Pictogram 88 Display item selection means 88a Direction key 89 Input means 89a Input key 93 Selection means 94 Sewing pattern storage part 95 Program storage part SS Normal sewing part SBS Reverse sewing part (at the sewing start side) Reverse sewing at the sewing end side Part SOS Condensed part (at the sewing start side) EOS Condensed part (at the sewing end side) P1 Set position P2 Sewing position P3 Corner knife position

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenji Kitada 8-2-1 Kokuryo-cho, Chofu-shi, Tokyo Inside Juke Corporation (72) Inventor Hiroshi Hirasawa 8-2-1, Kokuryo-cho, Chofu-shi, Tokyo F-term in Juke Corporation (reference) 3B150 AA01 AA11 AA25 CB14 CE01 CE03 CE22 CE27 DB01 DE01 DE09 DE14 DE17 DE20 DE27 GD14 GF02 GF03 GG10 JA07 JA28 LA06 LA16 LA59 LA60 LA73 LB02 NA05 NA06 NA07 NA15 NA55 NA56 Q04 Q06 Q06 QA08

Claims (8)

[Claims] 1. A continuous cloth feeding means for feeding cloth at a constant speed;
In a needle feed sewing machine having needle feed means for performing needle feed in connection with the continuous cloth feed means, the needle feed means comprises a needle swing support member for swingably supporting a needle, and rotation of a sewing machine drive shaft. A single pulse motor for converting a movement into a swing movement of the needle swing support member, and presence / absence of swing and swing of the needle swing support member according to a rotation angle of an output shaft of the pulse motor; A needle feed sewing machine having a link mechanism for changing an angle and a swing start direction, respectively. 2. The needle feed sewing machine according to claim 1, wherein the needle feed means is provided with a crank mechanism for limiting a swing range of the needle swing support member. 3. The apparatus according to claim 1, further comprising an operation panel for inputting a needle feed amount with respect to a stitch pitch, and a control unit for controlling the needle feed based on the input needle feed amount. Needle feed sewing machine. 4. A sewing machine driving means for moving a needle up and down, a continuous cloth feeding means for feeding a cloth at a constant speed, and a needle feeding direction and a needle feeding direction with respect to a stitch pitch while swinging a needle in a cloth feeding direction. At least one of which can be changed, and a control unit having a sewing program for controlling the sewing machine driving unit, the continuous fabric feeding unit and the needle feeding unit to form a desired seam on the fabric, A needle feed sewing machine characterized in that at least one of a feed direction and a needle feed amount of a fabric is controlled so as to be changeable during sewing. 5. An input means for inputting a feed direction and a needle feed amount of the cloth is provided, and when performing the sewing operation, the control unit feeds the cloth and the needle in the input feed direction and the needle feed amount of the cloth. The needle feed sewing machine according to claim 4, wherein the needle feed sewing machine is configured to control the needle feed. 6. The sewing machine according to claim 1, wherein the control unit includes a sewing pattern storage unit in which a feed direction and a needle feed amount of the fabric are stored for each sewing pattern as a part of the sewing pattern, and a plurality of sewing patterns stored in the sewing pattern storage unit. A selection means for selecting a desired sewing pattern from a sewing pattern is provided, and when performing a sewing operation, the control unit controls a feed direction and a needle feed amount of the cloth based on the sewing pattern selected by the selection means. The needle feed sewing machine according to claim 4, wherein the needle feed sewing machine is configured to perform the following. 7. The needle feed sewing machine according to claim 4, wherein the needle feed means is the needle feed means according to claim 1. 8. The needle feed sewing machine according to claim 7, wherein the needle feed means is provided with the crank mechanism according to claim 2.