JP4081298B2 - Staggered sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a staggered sewing machine, and more specifically, feeds the fabric in a forward and reverse direction at a predetermined pitch, and forms a staggered stitch on the fabric by swinging a needle or the fabric in a direction orthogonal to the feed direction of the fabric. Related to staggered sewing machines.
[0002]
[Prior art]
In such a staggered sewing machine, sewing data used for staggered stitching is determined by the amount of movement of the staggered stitch in the swing direction along the X direction of the needle or the fabric and the pitch in the cloth feed direction that is the Y direction, Since the pitch is set by mechanical means such as a scale dial of the sewing machine, the stitching data of the zigzag stitch is described by the X-coordinate of the swing value, and the Y direction is the forward / reverse direction of the cloth feed, that is, plus The data is described in minus.
[0003]
[Problems to be solved by the invention]
Recently, sewing data used for sewing has been created not only with a sewing machine but also with data supplied from the outside. In this case, vector data (X coordinate and Y coordinate describing the needle entry point) Needle entry data consisting of coordinate data is often supplied to the sewing machine. However, the vector data has a problem that the needle drop point is described in the X and Y coordinates and cannot be used as the needle drop data of the staggered sewing machine as it is.
[0004]
The object of the present invention has been made in view of such problems, and it is possible to create staggered stitching data by creating staggered stitching data from needle entry data described in vector data by a simple method. Is to provide a staggered sewing machine.
[0005]
[Means for Solving the Problems]
In order to solve this problem, the present invention
Cloth feeding means capable of feeding the dough forward and backward at a predetermined pitch; and
Pitch setting means for setting the pitch;
Rocking means for rocking the needle or the cloth in a direction orthogonal to the feeding direction,
In the staggered sewing machine that forms the staggered stitches on the fabric by driving the cloth feeding means and the swinging means,
An input means for inputting needle entry data from outside;
Calculating means for creating sewing data comprising X-coordinate data in the swinging direction at the needle drop point and forward / reverse data in the feed direction from the needle drop data;
Storage means for storing each calculated data;
The cloth feeding means is controlled to feed in the forward direction or the reverse direction based on the forward / reverse direction data at the pitch set by the pitch setting means, and the needle or the fabric is swung based on the X coordinate data. Thus, a configuration including a control means for controlling the swinging means is employed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
[0007]
FIG. 1 shows an overview of a staggered sewing machine according to the present invention, in which a needle 3 supported by a needle bar 2 is moved up and down by a main shaft motor 1 for rotating the main shaft. In relation to the vertical movement of the needle 3, the feed dog of the cloth feeding device (cloth feeding means) appears on the needle plate 4 so that the cloth pressed by the presser plate 5 is fed and cooperates with the cloth feeding device. The stitches are formed on the cloth by the action. The sewing feed pitch of the cloth can be set with the feed scale dial (pitch setting means) 6, and the back feed stitching performed at the start or end of sewing can be performed by setting the condensation feed pitch with the condensation scale dial 7. This is done by driving the feeding device with the set pitch feed amount. The condensed feed amount can be set to zero from the reverse feed amount equal to the normal feed amount, and the normal set amount is substantially zero or the reverse feed amount equal to the normal feed amount. In that case, by operating the reverse stitching lever 8 or by driving a reverse stitching solenoid (not shown) at the time of back stitching, the feed amount can be switched to perform the condensation stitching. In addition, 9 is a power switch, 10 is an operation panel provided with a display unit for performing various settings.
[0008]
The staggered sewing machine of the present invention is provided with a needle swing mechanism (swinging means) as shown in FIG. 2, and a needle bar 2 that supports the needle 3 is a needle swing motor (for example, a stepping motor or a servo motor). The link mechanism 12 driven at 11 is reciprocally swung in a direction (in the direction of the arrow in FIG. 2) perpendicular to the cloth feeding direction while synchronizing with the cloth feeding action of the cloth feeding device. A stitch pattern stitch can be formed. The needle swing mechanism is provided with an origin sensor 13 that detects the shielding plate 11a that rotates with the rotation of the needle swing motor 11, and detects the origin of the needle swing position. The swinging means can be realized not by swinging the needle but also by swinging the cloth.
[0009]
FIG. 3 is a block diagram showing a control system for a staggered sewing machine. A CPU 20 as a calculation means or control means controls the entire sewing machine. The CPU 20 includes an external device 21 such as a personal computer. Needle entry data necessary for sewing is input as vector data (coordinate data) via the input / output means 22. The input / output means 22 is a communication device or a memory card reader. Vector data is output to the external device 21 via the input / output means 22. Further, the CPU 20 includes various setting data such as a cloth feed pitch set by the feed scale dial 6, a condensation feed pitch set by the condensation scale dial 7, a set value set by the operation panel 10, and a sewing machine starting pedal. The sewing machine start command 23 generated from the machine and a signal from the origin sensor 13 are input.
[0010]
Further, the CPU 20 stores a ROM 30 that stores a control program, a RAM 31 that stores calculation data and is used as a work area, various programs such as a sewing program, sewing data necessary for sewing, needle entry data, setting data, and the like. A nonvolatile memory (storage means) 32 is connected.
[0011]
The CPU 20 is started by the signal of the sewing machine start command 23, rotates the spindle motor 1 and the needle swing motor 11 based on data set by the feed scale dial 6, the condensation scale dial 7, the setting panel 10, and the cloth feed. Various actuators 25 such as a motor 24, a thread tension solenoid, and a female solenoid are operated to control sewing according to the needle entry data.
[0012]
In the present invention, needle entry data is input as vector data from the external device 21, and this is converted into staggered needle entry data for sewing. As shown in FIG. 4A, the vector data is coordinate data in which needle drop points pn (n = 1, 2, 3, 4,...) Are described as coordinate values (xn, yn). On the other hand, in the needle drop data used in the staggered stitch, the X direction is the amount of movement of the needle or the fabric, the Y direction is the amount of movement in the cloth feed direction, and the feed scale dial 6 or the condensation scale dial 7 is mechanical. Therefore, the CPU 20 converts the vector data to the staggered stitch stitch data by the CPU 20.
[0013]
This conversion is shown in FIG. 4, and the X coordinate of the vector data input from the outside shown in FIG. 4B is used as it is, and the Y coordinate is converted into the forward / reverse direction data of the cloth feed. To do. In the illustrated example, since the direction is the + direction (positive direction), all Y coordinates are converted into “+” data. The sewing data converted in this way is shown in FIG. Further, when this sewing data is output to the external device 21 again, an appropriate feed pitch Y is added as Y direction data to obtain Y coordinate data. This is illustrated in FIG. As a result, even when the sewing data is output from the staggered sewing machine to the external device 21 including, for example, a personal computer, the shape can be displayed by the X / Y coordinate data, and can be used for editing work.
[0014]
FIG. 5 shows an example in which condensation sewing is performed. The X coordinate of the vector data input from the outside shown in FIG. 5B is used as it is, and the Y coordinate is used as the cloth feed. Convert to forward / reverse direction data. In the example shown in FIG. 5 (A), the normal zigzag stitching is performed from p1 to p4, and the cloth feed is in the positive direction, so the Y coordinates of p1 to p4 are converted to "+" data. Further, p5 to p8 are described in the forward direction for convenience in FIG. 5A, but actually, the reverse stitching is performed at the end of condensation sewing, and the cloth feed is reversed, so the Y coordinate is converted into “−” data. . The sewing data converted in this way is shown in FIG. When this sewing data is output to the external device 21 again, Y direction data is added up to p4, Y coordinate data is added with an appropriate feed pitch Y, and Y direction data is added from p5. Then, an appropriate condensation pitch Y ′ is added to obtain Y coordinate data. This is illustrated in FIG.
[0015]
In this way, needle entry data created by calculation is stored in the nonvolatile memory 32. This flow is illustrated in FIG.
[0016]
First, vector data input from the outside is selected (step S1), data conversion is performed as shown in FIGS. 4 and 5 (step S2), a registration destination of the converted data is designated, and conversion is performed. It is determined whether the data is applied to the condensed portion at the start of sewing, the condensed portion at the end of sewing, or the normal staggered portion (step S3). When the registration destination is normal zigzag stitching data (YES in step S4), data is registered in the data area related to the normal zigzag stitching portion of the nonvolatile memory 32 (step S5). In this case, needle entry data up to p4 in FIGS. 4C and 5C is stored in this data area.
[0017]
On the other hand, in the case of the first condensation sewing data (YES in step S6), the converted data is stored in the data area corresponding to the sewing start condensation portion of the nonvolatile memory 32 (step S7), and in the case of the end condensation sewing data. (NO in step S6), the converted data is stored in the data area corresponding to the condensation end portion of the non-volatile memory 32 (step S8).
[0018]
In the staggered sewing machine configured in this way, during sewing, the CPU 20 reads out the sewing data stored in the nonvolatile memory 32, and when the Y coordinate data is +, the fabric is fed at the pitch set by the feed scale dial 6. In the case of negative feed, the cloth feed motor 24 is controlled so that the reverse stitching solenoid (not shown) is driven and the fabric is fed in the reverse direction at the pitch set by the condensation scale dial 7 and the needle drop data X The zigzag stitching is executed by controlling the needle swing motor 11 based on the coordinate data.
[0019]
When the converted sewing data is output from the staggered sewing machine to the external device 21, for example, the needle entry data shown in FIGS. 4C and 5C stored in the nonvolatile memory 32 is used. Reading and conversion into vector data composed of X-coordinate and Y-coordinate data as shown in FIGS. 4D and 5D, respectively, under the CPU 20. The vector data is output to the external device 21 as a storage medium such as a personal computer or a memory card via the input / output means 22, and is displayed when the vector data is output to a personal computer capable of displaying the vector data. Can be used to edit the data.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to create zigzag stitch data from the needle entry data described in the coordinate data by a simple method and perform zigzag stitching. Further, by converting the Y direction data of the output data into Y coordinate data and outputting it as vector data, the commonality of the data and the data created by the staggered sewing machine can be handled by an external device.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the appearance of a staggered sewing machine of the present invention.
FIG. 2 is a configuration diagram showing a schematic configuration of a needle swing mechanism.
FIG. 3 is a block diagram showing a control configuration of a staggered sewing machine.
FIG. 4 is an explanatory diagram illustrating a flow of creating zigzag stitch data from vector data.
FIG. 5 is an explanatory diagram illustrating a flow of creating zigzag stitch data from other vector data.
FIG. 6 is a flowchart showing a flow of registering created data.
[Explanation of symbols]
1 Spindle motor 6 Feed scale dial 7 Condensation scale dial 11 Needle swing motor 24 Cloth feed motor

Claims (3)

Cloth feeding means capable of feeding the dough forward and backward at a predetermined pitch; and
Pitch setting means for setting the pitch;
Rocking means for rocking the needle or the cloth in a direction orthogonal to the feeding direction,
In the staggered sewing machine that forms the staggered stitches on the fabric by driving the cloth feeding means and the swinging means,
An input means for inputting needle entry data from outside;
Calculating means for creating sewing data comprising X-coordinate data in the swinging direction at the needle drop point and forward / reverse data in the feed direction from the needle drop data;
Storage means for storing each calculated data;
The cloth feeding means is controlled to feed in the forward direction or the reverse direction based on the forward / reverse direction data at the pitch set by the pitch setting means, and the needle or the fabric is swung based on the X coordinate data. And a control means for controlling the swing means as described above. Sewing part determination means for deciding whether to apply to each of the data calculated by the calculation means to a condensed part at the start of sewing, a condensed part at the end of sewing, or a normal zigzag stitched part. The staggered sewing machine according to claim 1. The calculation means sets Y coordinate data for the forward / reverse direction data of the feed direction stored in the storage means to create needle drop data, and outputs the needle drop data to an external device. The staggered sewing machine according to claim 2, comprising:

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