JP2747675B2 - Zigzag embroidery machine with rotation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary zigzag embroidery machine suitably used for realizing an embroidery pattern such as a rotary zigzag pattern based on hand movement data.

[0002]

2. Description of the Related Art In general, a base on which a lower thread for embroidery is disposed, and an embroidery needle on the upper thread side is reciprocated up and down at a position opposed to the lower thread side provided on the base. A head of an embroidery machine that swings with a required swing width, and is provided under the head so as to be movable on the base, and is driven forward, rearward, and left on the base by a driving source. , A moving frame driven in the right direction (x-axis direction and y-axis direction), and an embroidery cloth held in a stretched state in the moving frame. 2. Description of the Related Art A rotary zigzag sewing machine as a rotary zigzag embroidery machine including a rotary frame rotated with an embroidery cloth is known from, for example, Japanese Patent Application Laid-Open No. 63-203188.

In this kind of zigzag sewing machine with rotation, when the embroidery needle is reciprocated up and down while swinging the embroidery needle at a required swing width by the head of the embroidery machine, the moving frame is driven in the x-axis and y-axis directions. In addition, since the embroidery cloth is rotated together with the rotating frame in the moving frame, the embroidery pattern obtained by rotating the zigzag pattern according to the swing width of the embroidery needle is placed on the embroidery cloth in a relatively short time. There is an advantage that it can be realized.

Here, this kind of zigzag sewing machine with rotation includes position detecting means for detecting the moving amount of the moving frame in the x-axis and y-axis directions, and rotation angle detecting for detecting the rotation angle of the rotating frame with respect to the moving frame. Means and a swing width detecting means for detecting the swing width of the embroidery needle are provided. Prior to repeatedly reproducing the embroidery pattern, a teaching operation, which is usually referred to as an "exemplary learning" method, is performed.

[0005] In this teaching operation, a skilled operator prepares a desired embroidery pattern by adjusting the swing width of the reciprocating embroidery needle while manually moving and rotating the moving frame and the rotating frame. When the embroidery needle is read from the detecting means, the position of the moving frame (the center of the rotating frame), the rotation angle of the rotating frame, the swing width of the embroidery needle, and the like are determined. The center data is stored, and the drive source and the rotation source are operated based on the stored data, so that the embroidery pattern similar to that of a skilled person is repeatedly reproduced.

However, in the above-mentioned prior art, a skilled operator creates so-called teaching data by teaching work, and operates the head, drive source and rotation source of the embroidery machine based on this data. Although it is possible to simply reproduce the embroidery pattern by teaching work, it is difficult to reproduce the embroidery pattern with high quality by enlarging, reducing or deforming the embroidery pattern or changing the position. ing.

Therefore, the present applicant has previously filed Japanese Patent Application No. Hei.
No. 4300, etc., the data of the center of the embroidery needle relative to the center of the embroidery needle relative to the center of the embroidery needle, including the rotation angle of the rotary frame and the swing width of the embroidery needle, created by the teaching work, And a rotation zigzag embroidery machine (hereinafter referred to as prior art) capable of enlarging, reducing or changing an embroidery pattern based on the converted and calculated hand movement data.

In the prior art zigzag embroidery machine with rotation, when an embroidery pattern as shown in FIG. 12 is realized, first, the embroidery cloth held in an extended state on the rotating frame is moved to the position of the starting point N0 together with the moving frame. To the position of the needle center N1, and the embroidery needle is swung to the left and right with a swing width W at this position, so that the embroidery needle is moved to the needle drop points S1, S1.
Then, the embroidery cloth is moved together with the moving frame in the direction indicated by the arrow A1, and the center of the needles N2, N3,.
While sequentially arranging the embroidery needles at the positions of N4 and N5, the embroidery needles are swung left and right so that the needle drop points S3, S4, S5 and S6.
, S7, S8, S9, S10.

Next, at the position of the needle center N6, the embroidery cloth is rotated together with the rotating frame, for example, with respect to the x-axis at a rotation angle θ (0 ° ≦ 0 °).
(θ ≦ 90 °) in the direction indicated by the arrow C as the forward direction, and in this state, the embroidery needle is swung to the left and right to move the embroidery needle to the needle drop points S11 and S12. The embroidery needle is swung to the left and right while the embroidery needle is swung to the left and right while moving the embroidery cloth together with the moving frame in the forward direction indicated by the arrow A2 to sequentially arrange the embroidery needles at the positions of the needle centers N7, N8 and N9. The hands are sequentially moved to falling points S13, S14, S15, S16, S17, S18.

In the embroidery pattern as shown in FIG. 13, the embroidery frame is moved by moving the embroidery frame sequentially in the direction of arrow A1 until the needle drop points S1, S2,. At the position of the needle center N6, the embroidery cloth is rotated together with the rotating frame, for example, by a rotation angle θ with respect to the x-axis (where 90 ° <θ ≦
(180 °) in the direction indicated by arrow C, and the embroidery needle is swung to the left and right in this state to move the embroidery needle to the needle drop points S11 and S12. The embroidery cloth is moved in the direction of arrow A3, which is the forward direction, and the embroidery needles are sequentially arranged at the positions of the needle centers N7, N8, N9, and the embroidery needles are swung left and right so that the needle drop points S13, S
The hands are sequentially moved to 14, S15, S16, S17 and S18.

Further, in the embroidery pattern as shown in FIG. 14, the embroidery frame is moved to the needle drop points S1, S2,...
In the position of, the embroidery cloth is shown together with the rotating frame by, for example, a rotation angle θ with respect to the x axis (however, 180 ° <θ <270 °).
By rotating the embroidery needle left and right in this state, the embroidery needle is moved to the needle drop points S11 and S11.
Then, the embroidery cloth is moved together with the moving frame in the direction indicated by arrow A4, and the center of the needles N7, N8,.
While sequentially arranging the embroidery needles at the position of N9, move the embroidery needles to the left,
Swing right and needle drop points S13, S14, S15, S16, S17,
The hands are sequentially moved to S18.

Further, in the embroidery pattern as shown in FIG. 15, the embroidery frame is moved up to the needle drop points S1, S2,... The embroidery cloth is rotated together with the rotating frame in the direction of arrow C by a rotation angle θ (270 ° ≦ θ <360 °) with respect to the x-axis, for example.
By swinging to the right, the embroidery needle is moved to the needle drop point S1.
1, the needle is moved to S12, and then the embroidery cloth is moved together with the moving frame in the direction of arrow A5, which is the forward direction, to move the needle center N7,
While sequentially arranging the embroidery needles at the positions of N8 and N9, the embroidery needles are swung to the left and right so that the needle drop points S13, S14, S15 and S1.
The hands are moved sequentially in steps S6, S17 and S18.

[0013]

In the above-described zigzag embroidery machine with rotation according to the prior art, the embroidery cloth is simply rotated with the rotation frame based on the rotation angle θ of the read needle movement data. Thus, in the embroidery pattern as shown in FIG. 12, the embroidery cloth is rotated with the rotation frame at a rotation angle θ of 90 ° or less between the needle centers N5 and N6 in the forward direction indicated by arrow C at the minimum rotation angle. Although embroidery can be realized, for example, in the case of the embroidery pattern shown in FIGS. 14 and 15, the embroidery cloth is rotated together with the rotating frame between the needle centers N5 and N6.
When the embroidery needle is moved from the needle drop point S10 to the needle drop points S11 and S12 to perform the embroidery, the embroidery efficiency is poor. There is an unsolved problem of becoming.

The present invention has been made in view of the above-mentioned unsolved problems of the prior art, and the present invention relates to a method for realizing an embroidery pattern while rotating an embroidery cloth with a rotation frame by a rotation angle θ based on hand movement data. In addition, the direction of rotation of the embroidery cloth and the rotating frame can be appropriately selected, and by rotating the embroidery cloth in the forward or reverse direction with a rotation angle as small as possible, the embroidery efficiency can be greatly improved. It is an object of the present invention to provide a rotated zigzag embroidery machine.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a base on which a lower thread for embroidery is arranged, and a position provided on the base and facing the lower thread side. The embroidery needle on the upper thread side is reciprocated up and down, and is oscillated with a required swing width W. An embroidery machine head is provided below the head and movably mounted on the base. A moving frame driven forward, backward, left, and right on the base by a driving source; and an embroidery cloth held in an extended state in the moving frame, and a rotation source provided on the moving frame. A rotation frame for rotating the embroidery cloth at a rotation angle θ in the moving frame, data reading means for reading the hand movement data including the rotation angle θ and the swing width W, and a hand movement data read by the data reading means. Angle determining means for determining whether or not the rotation angle θ exceeds a predetermined angle; When it is determined that the angle θ exceeds a predetermined angle, a rotation direction control means for selectively rotating the rotating frame in the forward and reverse directions with the rotation source is adopted to reduce the rotation of the rotating frame. ing.

The angle determining means determines whether or not the rotation angle θ exceeds 180 ° as a predetermined angle. When the rotation angle θ exceeds 180 °, the rotation direction control means determines whether or not the rotation Then, the rotating frame may be rotated by an angle (θ-360 °).

Further, the angle determination means determines whether or not the rotation angle θ exceeds 90 ° as a predetermined angle. When the rotation angle θ exceeds 90 °, the rotation direction control means determines whether or not the rotation direction θ is Is smaller than 270 °, the rotating frame is rotated by an angle (θ−180 °) by the rotation source, and 270 °
In the above case, the rotation frame is rotated by the rotation source at an angle (θ-360).
°).

With the above configuration, the rotation direction of the rotating frame and the embroidery cloth can be switched between forward and reverse depending on whether or not the rotation angle θ of the read hand movement data exceeds a predetermined angle. The embroidery pattern can be realized in a short time while always rotating the embroidery cloth in the forward or reverse direction at a rotation angle of 180 ° or less or 90 ° or less.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary zigzag embroidery machine according to an embodiment of the present invention will be described in detail below, taking a rotary zigzag sewing machine as an example. In the embodiment, the same components as those in the prior art shown in FIGS. 12 to 15 are denoted by the same reference numerals, and description thereof will be omitted.

FIGS. 1 to 7 show a first embodiment of the present invention.

In the drawing, reference numeral 1 denotes a base of a zigzag sewing machine with rotation, and the base 1 has a plurality of legs 2, 2,.
A support frame 3 provided on each of the legs 2, and a moving frame 13, which will be described later, as shown in FIG.
A substantially rectangular needle plate 4 is provided below the rotating frame 15 and the like. The needle plate 4 has an embroidery needle 10 to be described later.
The needle hole through which is inserted is formed in an oval shape, and a bobbin (both not shown) for a bobbin thread is provided below the needle hole. As shown in FIG. 2, the support plate 3 has an x-axis direction frame moving mechanism 5 for moving the moving frame 13 in the left-right direction (hereinafter, referred to as x-axis direction), and a moving frame 13 in the front-rear direction (hereinafter, y direction).
And a frame moving mechanism 6 in the y-axis direction for moving the moving frame 13 in the x-axis direction.
Guide rollers 5A and 6A for guiding in the y-axis direction
And each guide rail 5B, 6B etc. are provided.

Reference numeral 7 denotes a support plate 3 extending on the moving frame 13.
A sewing machine head as a head of an embroidery machine provided above is shown. The sewing machine head 7 is driven by a main shaft motor 8 disposed below the support plate 3 through a flywheel 9 and the like as shown in FIGS. The embroidery needle 10 on the upper thread side is reciprocated up and down via a needle shaft 11 at a position facing the lower thread side. The sewing machine head 7 is provided with a needle shaft swing motor 12 (see FIG. 6) such as a pulse motor. The needle shaft swing motor 12 has a needle shaft 11 as shown in FIG.
The embroidery needle 10 is swung around the fulcrum 11A by the width W,
For example, it swings in the left-right direction (x-axis direction).

Reference numeral 13 denotes a movable frame which is located below the sewing machine head 7 and is movably provided on the support plate 3. The movable frame 13 is formed in a substantially rectangular plate shape as shown in FIG. A rim (not shown) protruding downward is provided on the lower surface side. The moving frame 13 is held in such a manner that its rim is engaged with the guide rollers 5A and 6A of the frame moving mechanisms 5 and 6, and the frame moving mechanisms 5 and 6 are controlled by a frame moving motor 14 (see FIG. 6) described later. By driving, the x-axis direction and y
It is moved in the axial direction.

Reference numeral 14 denotes a frame moving motor as a drive source for driving the frame moving mechanisms 5 and 6 to move the moving frame 13 in the x-axis direction and the y-axis direction. An x-axis motor for moving in the axial direction and a y-axis motor for moving in the y-axis direction (both not shown);
It is constituted by a pulse motor or the like.

Reference numeral 15 denotes a rotating frame that is rotatably disposed at the center of the moving frame 13. The rotating frame 15 holds the embroidery cloth 16 in an extended state, and holds the embroidery cloth 16 on the moving frame 13. The rotation frame 15 is rotated by a rotation angle θ about the frame center C.

Reference numeral 17 denotes a frame rotation motor as a rotation source provided on the moving frame 13, and the output shaft of the frame rotation motor 17 is connected to the rotation frame 15 via a timing belt (not shown) or the like. , The rotary frame 15 is rotationally driven on the movable frame 13 with a rotation angle θ. Here, the frame rotation motor 17
Is constituted by a pulse motor in the same manner as the frame moving motor 14 and the like, and rotates the rotary frame 15 in the forward direction or the reverse direction according to the number of pulses of a pulse signal output as a control signal from the sewing machine control unit 36 described later (see FIGS. (In the direction of arrow C or the direction of arrow D shown in FIG. 15) by open loop control.

Numeral 18 designates a cheese table serving also as a cover which is disposed on the support plate 3 at a predetermined height.
Above is a bobbin 19 for the upper thread as cheese, 19, ...
And an upper thread guide 21 for supplying the upper thread 20 from each bobbin 19 to the sewing head 7.
In FIG. 3, each bobbin 1 placed on the cheese table 18
9 is omitted.

Reference numeral 22 denotes an operation box provided on the cheese table 18 via a bracket 23. The operation box 22 has a display 24, a power supply ON and an OF, as shown in FIG.
F switches 25A and 25B, soft keys 26, a keyboard 27, a floppy disk device 28, and the like are provided, and a part of the sewing machine control unit 36 is incorporated. And
The soft keys 26 are used to read and write hand movement data, input and output data, enlarge and reduce data, etc. in accordance with the menu displayed on the display 24, and further set machine conditions (rotation based on the rotation angle θ). This includes so-called interactive keys for performing pattern change, pattern change, pattern selection, pattern addition, pattern combination, color change change, and the like.

The keyboard 27 is provided with a drive switch 29, a start switch 30, a stop / back switch 31, a jog key section 32, a ten key section 33, a buzzer 34, a speed variable knob 35, and the like.
The jog key unit 32 includes a frame moving key 32 in the x and y axis directions.
A, the origin switch 32B and the frame rotation key 32C,
32C and the like are provided. Then, the jog key section 32
When the frame moving key 32A is manually operated by the operator, the frame moving motor 14 is driven to move the moving frame 13 in the x-axis direction and the y-axis direction by a moving amount corresponding to the operation time. Prior to the creation of the embroidery pattern, each frame rotation key 32C is used, for example, for the texture of the embroidery cloth 16 and the rotation frame 15
The rotation frame 15 is rotated manually together with the embroidery cloth 16 by the frame rotation motor 17 when manually adjusting the rotation position.

On the other hand, the frame moving mechanisms 5, 6
Origin switches (both not shown) on the x-axis and y-axis sides are provided below the center of the embroidery needle 10 and the frame center of the rotary frame 15 as shown in FIG. When C coincides with the embroidery needle 10, this is detected through the frame moving mechanisms 5 and 6, and the sewing machine controller 36 and the like determine that the moving frame 13 is at the origin position with respect to the embroidery needle 10. I have. Although the origin of the rotation angle θ and the swing width W is detected in the same manner, the description thereof is omitted here.

Reference numeral 36 denotes a sewing machine control unit disposed below the support plate 3 at a position close to the operation box 22.
The sewing machine control section 36 is constituted by a microcomputer or the like, and has a soft key 2 as shown in FIG.
6, a keyboard 27, a floppy disk device 28, and the like are connected, and in some cases, a tape reader, an editing machine, a pattern making machine, and a teaching machine (all not shown).
Are connected, for example, via a communication line or the like. The output of the sewing machine controller 36 is connected to the spindle motor 8, the needle shaft swing motor 12, the frame moving motor 14, the frame rotating motor 17, the display 24, and the like.

The sewing machine control section 36 stores the program shown in FIG. 7 in its storage circuit and performs sewing machine control processing including processing for controlling the rotation direction of the rotating frame 15. Further, in the storage circuit of the sewing machine control unit 36, in the storage area 36A, for example, the hand movement data read from the floppy disk device 28 is stored, and the predetermined angle α (α = 180 °) and so on.

Here, the sewing machine control unit 36 converts the data N (ΔX, ΔY, θ, W) of the needle center N read from the outside as described in the prior art (Japanese Patent Application No. 4-244300). It is converted into the hand movement data C (Δx, Δy, θ, W) of the frame center C, and the hand movement data C (Δx, Δy, θ, W) is calculated.
The embroidery needle 10, the moving frame 13, the rotating frame 15 and the like are moved and rotated by controlling the operation of the main shaft motor 8, the frame moving motor 14, the frame rotating motor 17, the needle shaft swinging motor 12 and the like based on FIG. The embroidery pattern and the like illustrated in FIG.
6 is realized.

The zigzag sewing machine with rotation according to the present embodiment has the above-described configuration.
The sewing machine control processing including the rotation direction control processing of the rotary frame 15 by the control unit 6 will be described with reference to FIG.

First, when the processing operation is started, condition setting for performing the rotation direction control processing of the rotating frame 15 is executed by operating the soft key 26 in step 1 and step 2 is executed.
And the hand movement data C (Δx, Δy,
θ, W). Then, in step 3, it is determined whether or not to execute embroidery based on the hand movement data. For example, when embroidery is completed, "NO" is determined based on the end function in the hand movement data. The process returns and executes an embroidery ending operation such as sewing, thread trimming, and moving the end point.

If the hand movement data read in step 2 includes difference value data (Δx, Δy) and rotation angle θ as the frame moving amount, the embroidery is executed in step 3. Since the determination is “YES”, the process proceeds to step 4 and the rotation angle θ at this time is set to the predetermined angle α (α = 1
80 °).

If "NO" is determined in step 4, the embroidery cloth 16 and the rotating frame 15 are moved between the needle centers N5 and N6 as shown in the embroidery patterns shown in FIGS.
Since the embroidery is realized while rotating at a minimum rotation angle in the direction of arrow C, which is a positive direction, with a rotation angle θ within 0 °, the process proceeds to step 5 and the rotation angle θ at this time is read. According to the hand movement data, the frame rotation motor 1
7, the main shaft motor 8, the needle shaft swing motor 12, and the frame moving motor 14 are operated based on the hand movement data to perform embroidery while rotating the rotary frame 15 in the direction indicated by the arrow C by rotating the rotary shaft 7 forward. Repeat the subsequent processing.

When it is determined "YES" in step 4, the embroidery cloth 16 and the rotating frame 15 are moved between the needle centers N5 and N6 as shown in FIGS.
In the case of making a large rotation in the direction of arrow C with a rotation angle θ exceeding 0 °, the process proceeds to step 7 and the rotation angle θ to be rotated by the frame rotation motor 17 in this case is

[0039]

Calculated as θ ← (θ−360 °).

In this case, the rotation angle θ to be rotated by the frame rotation motor 17 is a negative (minus) angle − (360 °).
−θ), the frame rotation motor 17 is rotated in the reverse direction by this angle in step 6 to rotate the rotation frame 15 by the angle (360 ° −
The embroidery is executed by operating the main shaft motor 8, the needle shaft swing motor 12 and the frame moving motor 14 based on the hand movement data while rotating in the arrow D direction opposite to the arrow C direction by θ).

Thus, according to the present embodiment, the rotation direction of the rotary frame 15 is controlled by determining whether or not the rotation angle θ of the read hand movement data exceeds 180 ° as the predetermined angle α.
Is within 180 °, the rotation frame 15 is rotated by this angle in the direction of arrow C as a forward direction, and when it exceeds 180 °, the rotation frame 15 is rotated by an angle (360 ° −θ) with the direction of arrow C. Since it is made to rotate in the direction of arrow D in the opposite direction, for example, when creating an embroidery pattern as shown in FIGS. 14 and 15, the rotating frame 15 can always be rotated at an angle of 180 ° or less. Thus, the rotation amount of the frame rotation motor 17 can be reliably reduced.

When an embroidery pattern as shown in FIGS. 12 to 15 is prepared, the embroidery cloth 16 is moved together with the moving frame 13 by driving the frame moving mechanisms 5 and 6 by the frame moving motor 14. , A2,..., A5, etc., the embroidery cloth 16 can be always sent in the forward direction together with the moving frame 13, so that the embroidery can be always performed. The embroidery at this time is a so-called perfect as shown in FIG. Stitch (sequential)
Can be finished with high quality.

Therefore, in the present embodiment, when the embroidery pattern is created, the frame rotation motor 17 can always be controlled to rotate in the normal and reverse directions with a small rotation angle within 180 °, so that the embroidery pattern can be controlled in a short time based on the read needle movement data. And embroidery efficiency can be significantly improved.

The frame moving motor 14, the frame rotating motor 1
7 and the needle shaft oscillating motor 12 are constituted by a pulse motor or the like and driven by open loop control by a pulse signal output from the sewing machine control unit 36. Compared with a zigzag sewing machine, position detection means for detecting the amount of movement in the x-axis and y-axis directions, rotation angle detection means for detecting a rotation angle, and swing width detection means for detecting a swing width are unnecessary, and the number of parts is reduced. Various effects can be obtained, such as a drastic reduction in the workability and a reliable improvement in the workability during assembly.

In the first embodiment, in the program shown in FIG. 7, step 2 shows a specific example of the data reading means which is a component of the present invention, and step 4 shows a specific example of the angle judging means. Show, step 7 and step 6
Shows a specific example of the rotation direction control means.

Next, FIGS. 8 to 11 show a second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. This embodiment is characterized in that the program shown in FIGS. 8 and 9 is stored in the storage circuit of the sewing machine control unit 36, and the rotation angle of the rotating frame 15 is always the minimum rotation angle within 90 °. Thus, the sewing machine control processing for controlling the rotation of the frame rotation motor 17 in the forward and reverse directions is performed.

Here, in the storage circuit of the sewing machine control unit 36, in a storage area 36A, set values and the like corresponding to 90 ° which is a predetermined angle for angle determination and 270 ° which is another determination angle are stored. And the hand movement data C (Δx, Δy,
θ, W), a switching flag F for performing a positive / negative switching of the movement amount in the xy coordinates or the difference value data (Δx, Δy) is stored in an updatable manner. The switching flag F is normally set to F by the condition setting using the soft key 26.
= 0, the difference value data (Δx, Δy) is reversed to reverse the feed direction of the embroidery cloth 16 or the like, and the difference value data (−Δ
x, −Δy), F = 1 is set.

Next, a sewing machine control process performed by the sewing machine control unit 36 will be described with reference to FIGS.

First, when the processing operation is started, in step 11, the soft keys 26 are set in substantially the same manner as in the first embodiment.
After setting the switching flag F to 0 at step 12, the processes at steps 13, 14 and 20 are performed in the same manner as steps 2, 3 and 8 shown in FIG. Then, in a step 15, it is determined whether or not the switching flag F is F = 0, and "YES"
When it is determined that the difference value data (Δx, Δy) at the xy coordinate among the hand movement data C (Δx, Δy, θ, W) is determined, the process proceeds to step 16 without switching. Is set as difference value data (Δx, Δy) according to the data read in step (1).

Next, at step 17, the hand movement data C
Among (Δx, Δy, θ, W), it is determined whether or not the rotation angle θ exceeds 90 ° as a predetermined angle, and if “NO” is determined, the rotation angle θ is within 90 °. As in the embroidery pattern shown in FIG. 12, the embroidery cloth 16 is embroidered while rotating the embroidery cloth 16 together with the rotating frame 15 at a rotation angle .theta. Then, the process proceeds to step 18 and the rotation angle θ at this time is made according to the read hand movement data. In step 19, the frame rotating motor 17 is rotated forward to rotate the rotating frame 15 in the direction of arrow C. Then, the main shaft motor 8, the needle shaft swing motor 12 and the frame moving motor 14 are operated based on the hand movement data to execute embroidery, and thereafter, the processing after step 2 is repeated to realize the embroidery pattern as shown in FIG. .

If "YES" is determined in step 17, the rotation angle θ exceeds 90 ° as the predetermined angle, and the routine proceeds to step 22 shown in FIG.
Is in the range of 90 ° <θ <270 °, and when it is determined to be “YES”, FIG. 13 or FIG.
As shown in the embroidery pattern shown in FIG.
6 is rotated with the rotation frame 15 in the direction of arrow C with a rotation angle θ larger than 90 ° and smaller than 270 °, so that the process proceeds to step 23 where the frame rotation motor 17 rotates. Power angle θ,

[0052]

Calculated as θ ← (θ−180 °).

For example, in the embroidery pattern shown in FIG. 13, the rotation angle θ between the needle centers N5 and N6 is 90 ° <θ ≦ 180 °.
In this case, the rotation angle θ to be rotated by the frame rotation motor 17 based on the equation (2) is a negative angle − (18).
0 ° −θ) or 0 °, the frame rotation motor 17 is rotated in the reverse direction by this angle in step 19 shown in FIG. 8, and the rotation frame 15 is indicated by an arrow (180 ° −θ) smaller than 90 °. While rotating in the direction of arrow D opposite to the direction of C,
Embroidery is executed by operating the main shaft motor 8, the needle shaft swing motor 12 and the frame moving motor 14 based on the hand movement data.

In the embroidery pattern shown in FIG. 14, the rotation angle θ between the needle centers N5 and N6 is 180 ° <θ <270 °.
In this case, the rotation angle θ to be rotated by the frame rotation motor 17 based on the equation (2) is a positive angle (θ−180 °) smaller than 90 °, and is shown in FIG. In step 19, the frame rotation motor 17 is rotated forward by this angle to rotate the rotation frame 15 by the angle (θ-180 °) in the direction indicated by the arrow C, while the spindle motor 8, the needle shaft swing motor 12, and the frame movement. The embroidery is executed by operating the motor 14 based on the hand movement data.

For the embroidery pattern as shown in FIGS. 13 and 14, the frame rotation motor 17
The rotation angle .theta. To be rotated is converted into an angle (.theta.-180.degree.), And the rotating frame 15 is rotated by the frame rotating motor 17 by this angle.
9 are moved in the directions indicated by arrows A6 and A7 (reverse direction) opposite to the directions A4 and A4 (forward direction).
4 to determine whether the switching flag F is F = 0 or not.
ES ", the switching flag F is set in step 25.
Is inverted and set to F = 1.

With this arrangement, the embroidery needle 16 is sequentially arranged at the positions of the needle centers N7, N8 and N9 together with the moving frame 13 from the position of the needle center N6 shown in FIGS. 10 is swung left and right, and needle drop points S13 and S
When the hands are sequentially moved to 14, S15, S16, S17, and S18, F = 1 is determined to be “NO” in step 15 shown in FIG. 8, and the process proceeds to step 21 to move the hand movement data C (Δx,
In order to switch between positive and negative of the difference value data (Δx, Δy) at the xy coordinate among Δy, θ, W), step 13 is performed.
The difference value data (Δx, Δy) read in step (1) is converted to difference value data (−Δx, −Δy), and the embroidery cloth 16 is moved together with the moving frame 13 together with the moving frame 13 when the embroidery is executed in step 19. The embroidery needle 10 is sequentially moved to the positions of the needle centers N7, N8, and N9 while being sent in the directions indicated by arrows A6 and A7 (reverse directions).
Can be arranged reliably.

On the other hand, if "NO" is determined in the step 24, the switching flag F has already been set to F = 1, and the embroidery cloth 16 has been fed in the reverse direction. Then, the switching flag F is inverted to F = 0, and the subsequent cloth feeding direction is switched from the reverse direction to the forward direction again.

When the determination in step 22 is "NO", the rotation angle θ is 270 ° or more.
The embroidery cloth 16 between the needle centers N5 and N6 like the embroidery pattern shown in FIG.
Is rotated in the direction of arrow C with a rotation angle θ of 270 ° or more together with the rotating frame 15, so that the process proceeds to step 27 and the rotation angle θ to be rotated by the frame rotating motor 17 in this case is

[0059]

(3) θ ← (θ−360 °) Here, the calculation is performed as 270 ° ≦ θ <360 °.

In this case, the rotation angle θ to be rotated by the frame rotation motor 17 is a minus angle − (360 ° −
θ), the frame rotation motor 17 is rotated in the reverse direction by this angle in step 19 shown in FIG.
The main shaft motor 8, the needle shaft swing motor 12 and the frame moving motor 14 are operated based on the hand movement data while rotating in the direction indicated by the arrow C opposite to the direction indicated by the arrow C by an angle within the range (360 ° -θ). Then, embroidery is executed.

For the embroidery pattern as shown in FIG. 15, the rotation angle θ to be rotated by the frame rotation motor 17 is converted into an angle (θ-360 °) by the processing in step 26, and the frame rotation is performed by this angle. Even after the rotating frame 15 is rotated in the direction of arrow D by the motor 17, the embroidery cloth 1 is rotated in the same manner as in the prior art.
6 only needs to be sent together with the moving frame 13 in the direction of arrow A5 (forward direction). In this case, there is no need to invert the switching flag F, and the processing after step 19 is repeated.

When embroidery is executed in step 19 based on the processing in steps 18 and 27 while the switching flag F is set to F = 0, the embroidery pattern shown in FIGS. The embroidery cloth 16 is sequentially moved together with the moving frame 13 from the position of the needle center N6 as shown in FIG.
8 and N9, the embroidery needle 10 is swung to the left and right while moving in the forward directions indicated by arrows A2 and A5.
The hands can be sequentially moved to S14, S15, S16, S17, and S18. At this time, as shown in FIG.
The embroidery can be finished with high quality as a so-called perfect stitch (sequential stitch) by entanglement with the embroidery.

However, when embroidery is executed in step 19 based on the processing in step 23, for example, FIG.
As in the embroidery pattern shown in FIG. 14, the embroidery cloth 16 is sequentially moved with the moving frame 13 and the needle centers N7, N8, N from the position of the needle center N6.
The embroidery needle 10 is swung to the left and right while the embroidery needle 10 is swung to the left and right while moving in the directions indicated by arrows A6 and A7, which are opposite directions, to the positions 9 and 9, respectively.
Since the hands are sequentially moved to 4, S15, S16, S17 and S18, the upper thread 20 becomes entangled with the lower thread 41 as shown in FIG. It cannot be finished.

Therefore, when it is necessary to finish the embroidery with high quality, it is possible to set the condition by using the soft key 26 in step 1 so as not to perform the conversion calculation of the rotation angle θ in step 23. Embroidery cloth 16 as well as technology
In the forward direction (arrows A1 to A1 shown in FIGS. 12 to 15).
Embroidery can be executed by sending the embroidery in 5 directions), and the embroidery can be finished with high quality.

Thus, in this embodiment constructed as described above, the operation and effect can be obtained almost in the same manner as in the first embodiment. In particular, in this embodiment, the condition is set in advance by the soft key 26. In this manner, the rotation angle θ is converted into a rotation angle of 90 ° or less, and the embroidery cloth 16 can be continuously rotated with the rotation frame 15 at the minimum rotation angle, and the embroidery can be continuously performed, as shown in FIGS. 12 to 15. Any embroidery pattern can be finished in a short time.

In the second embodiment, FIGS.
Step 13 shows a specific example of the data reading means which is a constituent element of the present invention, step 17 shows a specific example of the angle determination means, and step 22, step 23, step 27 and step 19 of the program shown in FIG. 9 shows a specific example of a direction control unit.

In each of the above embodiments, the predetermined angle is set to α =
The case where the angle is set to 180 ° or 90 ° has been described as an example, but the present invention is not limited to this. For example, the predetermined angle α described in the first embodiment may be set in the range of 90 ° <α <200 °. Fifteen
It may be changed to 0 ° or 190 °.

[0068]

As described above in detail, according to the present invention, when the rotation angle .theta. Of the hand movement data read by the data reading means exceeds a predetermined angle, the rotating frame is rotated by the rotating source to reduce the rotation of the rotating frame. Is selectively rotated in the forward and reverse directions, so that the embroidery cloth and the rotation frame are rotated when the embroidery pattern is realized while rotating the embroidery cloth with the rotation frame by the rotation angle θ based on the hand movement data. The direction can be appropriately selected, and the embroidery cloth can be rotated in the forward or reverse direction to greatly improve the embroidery efficiency.

In this case, the predetermined angle is set to, for example, 180 °.
When the rotation angle θ of the hand movement data exceeds 180 °, the rotation frame is rotated by an angle (θ-360 °) by the rotation source, so that the rotation frame is always rotated at a rotation angle within 180 °. The embroidery pattern can be realized by rotating in the opposite direction, and in this case, the embroidery pattern can be finished with high quality in a relatively short time.

When the predetermined angle is 90 ° and the rotation angle θ exceeds 90 °, the rotation angle θ becomes 27 degrees.
When the rotation frame is smaller than 0 °, the rotation frame is rotated by an angle (θ-1).
80 °), and if the rotation angle is more than 270 °, the rotation frame is rotated by (θ-360 °) by the rotation source, and the embroidery pattern is realized. The angle can always be reduced to 90 ° or less, and by rotating the embroidery cloth in the normal or reverse direction with the minimum rotation angle, various effects can be achieved, such as realizing an embroidery pattern in a shorter time.

[Brief description of the drawings]

FIG. 1 is a front view showing a zigzag sewing machine with rotation according to a first embodiment of the present invention.

FIG. 2 is a plan view of the zigzag sewing machine with rotation shown in FIG.

FIG. 3 is a right side view of the zigzag sewing machine with rotation shown in FIG. 1;

FIG. 4 is an enlarged front view of the operation box shown in FIG. 1;

FIG. 5 is an explanatory diagram showing a swing width of a needle shaft and an embroidery needle.

FIG. 6 is a control block diagram of the zigzag sewing machine with rotation shown in FIG. 1;

FIG. 7 is a flowchart showing a sewing machine control process.

FIG. 8 is a flowchart illustrating a sewing machine control process according to the second embodiment.

FIG. 9 is a flowchart showing a sewing machine control process following FIG. 8;

FIG. 10 is an explanatory view showing a perfect stitch.

FIG. 11 is an explanatory diagram showing hitch stitches.

FIG. 12 is an explanatory diagram showing a state in which an embroidery pattern is created while rotating the embroidery cloth at a rotation angle θ within 90 °.

FIG. 13 is an explanatory diagram showing a state in which an embroidery pattern is created while rotating the embroidery cloth at a rotation angle θ within 180 °.

FIG. 14 is an explanatory diagram showing a state in which an embroidery pattern is created while rotating the embroidery cloth at a rotation angle θ of 180 ° to 270 °.

FIG. 15 is an explanatory diagram showing a state in which an embroidery pattern is created while rotating the embroidery cloth at a rotation angle θ of 270 ° to 360 °.

[Explanation of symbols]

 Reference Signs List 1 base 3 support plate 5, 6 frame moving mechanism 7 sewing machine head (head of embroidery machine) 10 embroidery needle 12 needle shaft swing motor 13 moving frame 14 frame moving motor (drive source) 15 rotation frame 16 embroidery cloth 17 frame rotation Motor (rotation source) 22 Operation box 24 Display 26 Soft key 28 Floppy disk device 36 Sewing machine control unit C Frame center N Needle center S Needle drop point

Claims (3)

(57) [Claims] 1. A base on which a lower thread for embroidery is arranged, and an embroidery needle on the upper thread side is reciprocated up and down at a position opposed to the lower thread side provided on the base. And a head of the embroidery machine that swings at a required swing width W, and is provided under the head so as to be movable on the base, and is driven by a driving source to move forward, rearward, left, and right on the base. A moving frame driven in the right direction, and a rotating frame for holding the embroidery cloth in an extended state in the moving frame and rotating the embroidery cloth at a rotation angle θ in the moving frame by a rotation source provided in the moving frame. Data reading means for reading the hand movement data including the rotation angle θ and the swing width W; and angle determination for determining whether or not the rotation angle θ of the hand movement data read by the data reading means exceeds a predetermined angle. Means, when it is determined by the angle determination means that the rotation angle θ exceeds a predetermined angle, Rotary frame positive, formed by constituted by a rotational direction control means for selectively rotating in the reverse direction rotation with zigzag embroidery machine in the rotary source in order to reduce the rolling. 2. The angle judging means judges whether or not the rotation angle θ exceeds 180 ° as a predetermined angle.
2. The rotating zigzag embroidery machine according to claim 1, wherein when the angle exceeds 180 °, the rotation direction control means rotates the rotating frame by an angle (θ-360 °) by the rotation source. 3. The angle determining means determines whether or not the rotation angle θ exceeds 90 ° as a predetermined angle. When the rotation angle θ exceeds 90 °, the rotation direction control means determines whether or not the rotation angle θ is greater than 90 °. Is smaller than 270 °, the rotating frame is rotated by an angle (θ−180 °) by the rotation source, and when 270 ° or more, the rotating frame is rotated by an angle (θ−360 °) by the rotating source.
2. The rotating zigzag embroidery machine according to claim 1, wherein the embroidery machine is rotated only by rotation.