JP2595146B2 - Sewing die grooving device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic cycle sewing machine, in which a needle escape is provided on a cloth presser plate attached to a presser arm or a cassette to be inserted. The present invention relates to a sewing die groove forming apparatus for forming a die groove.

[0002]

2. Description of the Related Art An electronic cycle sewing machine is also referred to as an electronic cycle machine or an electronic pattern sewing machine. A sewing material (a cloth, a synthetic resin sheet, leather, or the like, but also referred to as a "cloth" for convenience) is attached to an outer holding arm. The sewing data (pattern data) stored in advance on a floppy disk or the like is read out by holding the holding plate or the cassette to be inserted, and the relative position with respect to the needle is set in the X direction orthogonal to the plane parallel to the cloth surface. This is an industrial sewing machine capable of sewing various patterns such as complicated sewing lines and embroidery by freely moving the sewing machine in the Y direction.

However, in such an electronic cycle sewing machine, only the peripheral portion of the cloth is clamped so that the relative position of the needle and the cloth in the X-Y direction can be relatively set so that pattern sewing of various patterns can be performed. Because it can be changed freely over a wide range, the cloth presser near the actual needle drop position becomes insufficient, especially at the center, where the cloth becomes slack, causing uneven sewing and distortion of the sewing pattern. Skipping may occur.

[0004] In view of this, an electronic cycle sewing machine in which a needle escape groove formed in a plate material such as a plastic plate is fitted into a cloth presser plate attached to an outer presser arm of the electronic cycle sewing machine or a cassette inserted therein. It is used as an auxiliary plate for holding the cloth so that the sewing material can be reliably supported near the needle drop point so that the above-mentioned inconvenience does not occur.

[0005] As an apparatus for forming a mold groove in the plate material,
A machine that also functions as an electronic cycle sewing machine or a dedicated sewing-type grooving device is used.
As disclosed in Japanese Patent Application Laid-Open No. 2391 and Japanese Unexamined Patent Publication No. 2-1721491, the relative position of the plate material with respect to the grooving tool is determined by using sewing data in the electronic cycle sewing machine.
There is a type in which a mold groove can be easily formed along a sewing pattern by moving the mold groove in a direction to cut the mold groove.

[0006]

According to such a conventional sewing die groove cutting apparatus, for example, sewing data (a pattern for finishing sewing of a collar of a shirt, etc.) as shown in FIG. As shown in FIG. 2B, a mold groove 1a having a groove width corresponding to the diameter of the groove cutting tool can be easily formed on the plate 1 in the same pattern as the sewing data. However, depending on the shape of the sewing pattern, it is preferable to use a plate material that is grooved in a shape that encompasses all stitch formation points as an auxiliary plate for the presser foot, rather than a plate material that is grooved along the pattern. There are cases.

For example, in the case of sewing data (such as a bar-tacking pattern) as shown in FIG. 3A, the pattern groove 1b is formed along the sewing data as shown in FIG. 3B. If it is formed, it will interfere with the needle even if it is slightly inclined when it is mounted on the electronic cycle sewing machine. Therefore, the processing accuracy and mounting accuracy must be increased, and the grooving process requires a lot of time. Occurs.

Therefore, as shown in FIG. 3C, forming a mold groove 1c having such a shape as to cover all the stitch forming points of the sewing data requires more processing accuracy and mounting accuracy. However, there is an advantage that the processing time is greatly reduced. However, in order to form a mold groove having such a desired shape, groove cutting data for that purpose had to be created separately from sewing data. there were.

The present invention has been made in view of the above points, and utilizes only sewing data to cover all the stitch forming points of the sewing data even in a pattern groove along the sewing data. It is an object of the present invention to be able to arbitrarily select and form a mold groove having such a shape as required.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a sewing-type grooving apparatus as described above, wherein a relative position of a plat to a grooving tool is determined based on control data. X direction and Y orthogonal in a parallel plane
A mechanism for cutting the mold groove by moving in the direction, sewing data storage means for storing sewing data by the electronic cycle sewing machine,
Comprehensive data creating means for creating comprehensive data covering all stitch forming points from the sewing data; and output data selection for selecting either the sewing data or the comprehensive data as control data for controlling the mechanism. Means.

Further, the comprehensive data creating means selects only the data of the seam forming points constituting the comprehensive figure from the seam forming point data group constituting the sewing data, and divides the selected data into the selected data. It is preferable that when the XY control is performed along the data, the comprehensive figure is rearranged so as to sequentially move, and the comprehensive figure is rearranged.

[0012]

According to the present invention, if sewing data is selected as control data by the output data selecting means, the grooving mechanism is controlled by the sewing data itself stored in the sewing data storage means, and (FIG. 3). Forming grooves along the sewing pattern as shown in B) can be formed, and if comprehensive data is selected, the groove cutting mechanism is controlled by comprehensive data created from the sewing data by the comprehensive data creating means. A mold groove having a shape that encompasses all the stitch formation points of the sewing data as shown in FIG.

As the comprehensive data, only the data of the seam forming points constituting the comprehensive figure is selected from the seam forming point data group constituting the sewing data, and each selected data is converted into X along the data. It can be easily created by rearranging the comprehensive graphics so as to sequentially move when performing the -Y control.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 4 is a partially cutaway perspective view showing the appearance of a sewing die groove cutting device according to an embodiment of the present invention. The sewing-type groove cutting device includes a device main body 2 and a control box 3, and both are electrically connected by a connection cable 4.

In the apparatus main body 2, a tool head 6 is mounted on a high step portion of a stepped base 5 and an XY table 7 is mounted on a low step portion. The tool head 6 is provided with an arm that moves up and down by the driving force of a built-in motor (not shown in FIG. 4). A tool motor 9 is mounted on the tip of the arm so that the spindle faces vertically downward. A rotary cutting blade 10 as a cutting tool is attached.

On the other hand, the XY table 7 has an X-direction moving body 11 and a Y-direction moving body 12 slidably mounted on the X-direction moving body 11. It is moved in the X direction and the Y direction orthogonal thereto through a transmission mechanism including a belt and a pulley. Therefore, the Y-direction moving body 12 can be freely moved in the XY direction by a predetermined range. The Y-direction moving body 12
A U-shaped plate holding arm 15 for holding the above-described plate 1 is fixedly attached thereto.
XY in a horizontal plane perpendicular to the vertical axis
It is configured to be relatively movable in the direction.

Therefore, when the rotary cutting blade 10 is rotated by the tool motor 9 and the arm 8 of the tool head 6 is lowered, the rotary cutting blade 10 makes a hole in the plate 1 while moving down, and thereafter the plate 1 is X The required mold groove is cut by moving in the −Y direction. Although not shown, an escape recess is provided in a portion of the base 5 facing the rotary cutting blade 10, as a matter of course.

The control box 3 is a part for controlling the main body 2, and includes a display 17 capable of displaying a plurality of digits or characters, and a sewing data selection key comprising an up key 18a, a down key 18b, and an enter key 18c. 18 and a toggle type output data selection switch 19
And a push button type start switch 20 and a floppy disk drive (hereinafter abbreviated as "FDD") 21 for writing and reading data to and from a floppy disk are provided to be operable from outside.

Also, as shown in FIG.
A control unit (control board) 22 mainly composed of a microcomputer including U, ROM, RAM, I / O, etc.
Are provided, and each of the above units is connected to this control unit,
The output signals are output to four drivers 23 to 26, respectively, and the above-described tool motor 9 in the apparatus main body 2, the lifting / lowering motor 16 of the arm 8, the X-axis motor 13 and the Y-axis motor of the XY table 7, respectively. 14 is driven and controlled.

FIG. 1 is a block diagram showing functions according to the present invention by the control section 22 of the control box 3. As shown in FIG. The sewing data selection means 31 determines the sewing data selected by the sewing data selection key 18 and performs FDD.
The sewing data is read by the sewing data reading means 32 by the sewing machine 21 and is stored in the sewing data storage means 33 (RAM).

The selection of the sewing data is performed, for example, in the FDD2
The pattern numbers and the like of the sewing data stored in the floppy disk inserted in 1 are displayed on the display 17 one by one, and the display is moved forward and backward by the up key 18a and the down key 18b, and the desired pattern is displayed. If the enter key 18c is pressed when the number is displayed, the sewing data of the pattern number is selected.

The comprehensive data calculating means 34 is a comprehensive data creating means for creating comprehensive data including all the stitch forming points (needle drop points) from the sewing data stored in the sewing data storage means 33. The created comprehensive data is stored in the comprehensive data storage means 35 (RAM).

The output data selection switching means 36 determines the state of the output data selection switch 19, and outputs one of the sewing data of the sewing data storage means 33 and the comprehensive data of the comprehensive data storage means 35 to the output data selection means 37. Is selected as the control data to be performed.

The start signal detecting means 38 detects when the start switch 20 is pressed, and causes the output data reading means 39 to read the data selected by the output data selecting means. X including
-Output as control data to the Y driving means 40.

Here, in order to create comprehensive data by the comprehensive data calculating means 34, sewing data created for performing automatic sewing with a desired sewing pattern by an electronic cycle sewing machine is used, and the sewing data is arbitrarily selected. Is selected only from the seam forming point data group connected by the calculation, and the selected comprehensive figure forming data is subjected to XY control along the selected data. It can be created by rearranging the figures so that they move sequentially around the periphery.

If this comprehensive data is used as the XY control data, it is possible to form a comprehensive shaped groove in the plate 1 that escapes all the needle drop points during sewing by the sewing data. Further, according to this embodiment, it is possible to select which of the sewing data and the comprehensive data is to be used as the XY control data by the output data selection switch 19, so that the mode for performing the mold groove cutting along the sewing data and the comprehensive mode can be selected. It is possible to switch the mode for performing the mold grooving according to the data.

Next, creation of comprehensive data will be described in more detail. One of the above-mentioned comprehensive figures is a figure called a convex hull. Selective extraction of data constituting the convex hull from the stitch forming point data group connected in an arbitrary order of the sewing data can be performed by the following calculation.

FIG. 6 shows a data group representing the coordinates of n stitch forming points as indicated by small crosses, and the coordinates of each point are represented by (Xi, Yi). Then, first, two points, a point P1 having the minimum value of the X coordinate and a point P2 having the maximum value, are selected. From FIG. 6, it can be seen that these two points are always the constituent points of the convex hull.

Here, the point P1 having the minimum X value is selectively extracted as the first constituent point (Xt1, Yt1) of the convex hull, and the point P2 having the maximum X value is called a turning point (Xtm, Ytm). . Next, paying attention to the first constituent point of the convex hull (Xt1, Yt1), the second point forming the convex hull is obtained by the following method.

The slope of a straight line connecting the first constituent point (Xt1, Yt1) and each of the remaining points is determined. At this time, as shown in FIG. 7, it can be seen that the point having the largest slope is the second component point of the convex hull. Therefore, the slope (the value of a when Y = aX + b) between the point (Xt1, Yt1) and each of the remaining points is obtained, and the point having the maximum value is determined as the second constituent point (Xt2, Xt2, Yt2).

Also in the case of obtaining the third constituent point, as shown in FIG. 8, the slope between the point (Xt2, Yt2) and each of the remaining points is obtained, and the point having the maximum value is taken as the third constituent point. Good. However, a is positive when the inclination is rightward and a negative when the inclination is rightward. Also note the following: One is an inclination with respect to a straight line connected to the point Pn as shown in FIG. In this case, the next constituent point after the point Pn should be the point A, but when the inclination is obtained, the inclination of the straight line connected to the point B becomes larger.

This problem can be avoided by selecting the constituent points as follows. When the direction for finding the constituent points of the convex hull goes from the point with the minimum X value to the point with the maximum X value, the object for which the slope is to be determined is limited to points having an X value larger than the X value of the reference point. In this way, the constituent points to be selectively extracted eventually become the turning points (Xtm, Ytm). It is clear from FIG. 10 that the search target after the turning point is limited to points having an X value smaller than the X value of the reference point.

The other is a case where there are a plurality of points having the maximum inclination as shown in FIG. In this case, it is clear that the point farthest from the reference point should be selected. Therefore, the distance dy from the reference value of the point having the maximum slope is calculated, and the point having the maximum value is selected as the convex hull constituting point. When the convex hull composing points are selected and extracted one after another in this manner, the last one is selected as the convex hull first composing point, and the convex hull is completed at this point.

As is clear from the above description,
If the XY table 7 is moved according to the extracted convex hull configuration data, the outer periphery of the convex hull is traced in order. Of course, in these selection and extraction processes, the points selected as the constituent points of the convex hull and the points that had the maximum slope at a certain point in time but were not selected as the convex hull constituent points in the selection of distance were twice. Since it is not necessary to be a selection target, the calculation time can also be reduced by designating the selection exclusion so as not to be a calculation target of convex hull constituent point extraction and selection thereafter.

Further, as shown in FIG. 4, the apparatus main body 2 is a milling mechanism in which the rotary cutting blade 10 can move up and down, and it is necessary to temporarily stop the XY table 7 at the point where the rotary cutting blade 10 moves up and down. A pause command may be inserted at all of the comprehensive data constituent points obtained by the operation, or a pause command may be automatically set at the start point and the end point, that is, at the first constituent point of the convex hull.

Further, the output data selection switch is provided as shown in FIG.
Although a changeover switch may be actually used as shown in
The selection can be switched by the identification code added to the sewing data in advance.

Next, a specific example of the above-described processing relating to the creation of comprehensive data by the control unit 22 in the controller box 3 shown in FIGS. 4 and 5 will be described with reference to the flowcharts of FIGS.

FIG. 12 shows a main routine. When this routine is started, it is necessary to first initialize the data in the memory and then determine whether or not to read the sewing data. Immediately proceeds to the determination of milling control start, but if necessary, the sewing data selection key 1
8 and the display 17 to perform the above-described sewing data selection processing, read the selected sewing data, and execute processing of convex hull configuration data (inclusive data) calculation based on the sewing data.

Then, it is determined whether or not the milling control is started. If NO, the process returns to the determination as to whether to read the sewing data, and the above-described processing is repeated. If YES, the read control data (output data) is selected. It is determined whether the switch 19 is on the normal side or the convex hull side.
Data (sewing data) is read, and if it is on the convex hull side, convex hull configuration data is read and output as control data.
Thereafter, it is determined whether or not the read control data is the last data. If not, the process returns to the determination of the read control data selection switch to continue the milling control, and if it is the last, whether to read the sewing data. Return to the judgment.

In the convex hull configuration data calculation, as shown in the subroutine of FIG. 13, first, the sewing data is searched for two points having the maximum and minimum X values, which are the main points constituting the convex hull (subroutine A). Then, the sewing data having the minimum X value is selected as the first constituent point of the convex hull. Furthermore, the minimum X
If there is another point having the same value as the value, the point having the maximum Y value among the points having the minimum X value is set as the next convex hull constituting point (second point).

Thereafter, based on the last selected convex hull composing point, the next convex hull composing point is sequentially selected and extracted up to a point having the maximum X value (convex hull turning point) (subroutine B). Next, the selected mark of the data having the same value as the first constituent point of the convex hull is canceled, and the selected mark is again selected.

If there is another point having the same value as the maximum X value, the point having the minimum Y value among the points having the maximum X value is set as the next convex hull constituting point. Then, based on the last selected convex hull composing point, the next convex hull composing point is sequentially selected and extracted up to a point having the minimum X value (convex hull starting point) (subroutine C).

In subroutine A, as shown in FIG. 14, data having the minimum X value is searched for in the sewing data, and if there is a plurality of data having the minimum X value, the minimum Y value Search for. Then, all the data whose X value is equal to the minimum value Xmin are marked as selected, and points matching the minimum X value and Y value are substituted into Xmin and Ymin. This is the coordinate value of the first point of the convex hull.

Next, the data having the maximum X value in the sewing data is searched, and when there is a plurality of data having the maximum X value, the maximum Y value is searched among them. Then, all the data whose X value is equal to the maximum value Xmax are marked as selected, and points matching the maximum X value and Y value are substituted into Xmax and Ymax. This is the coordinate value of the convex hull turning point.

In subroutine B of FIG. 13, as shown in FIG. 15, it is first determined whether or not the X value of the sewing data is larger than the X value of the last convex hull composing point. If it is large, after calculating the inclination of the straight line connecting the reference point (the last convex hull constituting point) and this sewing data,
Mark for selection. Then, the maximum value Amax of the inclination is obtained from the data marked with the mark to be selected, the distance between two points with respect to the reference point is obtained only for the data whose inclination matches Amax, and the maximum value Dmax is obtained.

As a result, the sewing data having the inclination of Amax and the distance of Dmax is extracted as the next convex hull constituting point. After that, the selected mark is put on all the sewing data whose inclination matches Amax. The above processes are repeatedly executed until the X value and Y value of the selected convex hull composing point match Xmax and Ymax (turning point).

In the subroutine B of FIG. 13, as shown in FIG. 15, first, it is determined whether or not the X value of the sewing data is larger than the X value of the last convex hull composing point. If it is large, after calculating the inclination of the straight line connecting the reference point (the last convex hull constituting point) and this sewing data,
Mark for selection. Then, the maximum value Amax of the inclination is obtained from the data marked with the mark to be selected, the distance between two points with respect to the reference point is obtained only for the data whose inclination matches Amax, and the maximum value Dmax is obtained.

As a result, sewing data having an inclination of Amax and a distance of Dmax is extracted as the next convex hull constituting point. After that, the selected mark is put on all the sewing data whose inclination matches Amax. The above processes are repeatedly executed until the X value and Y value of the selected convex hull composing point match Xmax and Ymax (turning point).

In subroutine C of FIG. 13, as shown in FIG. 16, it is first determined whether or not the X value of the sewing data is smaller than the X value of the last convex hull composing point. If it is smaller, calculate the slope of the straight line connecting the reference point (the last convex hull composing point) and this sewing data.
Mark for selection. Then, the maximum value Amax of the inclination is obtained from the data marked with the mark to be selected, the distance between two points with respect to the reference point is obtained only for the data whose inclination matches Amax, and the maximum value Dmax is obtained.

As a result, the sewing data having the inclination of Amax and the distance of Dmax is extracted as the next convex hull constituting point. After that, the selected mark is put on all the sewing data whose inclination matches Amax. The above processes are repeatedly executed until the X value and the Y value of the selected convex hull composing point match Xmin and Ymin (start point).

In the above-described embodiment, a dedicated sewing die groove cutting device has been described. However, the XY table and the outer holding arm of the electronic cycle sewing machine can be used as a plate material holding / moving mechanism. By attaching the tool head to the head, the electronic cycle sewing machine can also be used as a sewing-type groove cutting device. Of course, the present invention can be applied to such a device that is also used as a sewing machine.

[0052]

As described above, according to the present invention, comprehensive data including all the stitch forming points is created from the sewing data, and the comprehensive data is created as data for controlling the mold groove cutting mechanism. Since it can be selected along with the data, it is possible to arbitrarily select and form the mold groove along the sewing pattern or the mold groove that covers all the stitch formation points as necessary. In addition, there is no need for time and effort to separately create comprehensive groove cutting data.

[Brief description of the drawings]

FIG. 1 is a block diagram showing functions according to the present invention by a control unit 22 in a control box 3 shown in FIG.

FIG. 2 is an explanatory view showing an example of a plate material on which sewing data and a mold groove along the pattern are formed.

FIG. 3 is an explanatory diagram showing an example of forming a mold groove having a shape including other sewing data, a mold groove along a pattern thereof, and all stitch formation points.

FIG. 4 is a partially cutaway perspective view showing the appearance of a sewing die groove cutting device according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a control box 3 in FIG.

FIG. 6 is an explanatory diagram regarding selection of a first configuration point and a turning point when creating comprehensive data.

FIG. 7 is an explanatory diagram regarding selection of a second configuration point.

FIG. 8 is an explanatory diagram regarding selection of a third configuration point.

FIG. 9 is an explanatory diagram regarding limitation of a selection target to a turning point in the same manner.

FIG. 10 is an explanatory diagram regarding limitation of a selection target after a turning point.

FIG. 11 is an explanatory diagram regarding selection of a convex hull constituting point when there are a plurality of points having the same maximum inclination.

FIG. 12 is a flowchart showing a specific example of processing relating to creation of comprehensive data by the control unit 22 in the control box 3 shown in FIGS. 4 and 5;

FIG. 13 is a flowchart showing the contents of a subroutine for calculating the convex hull configuration data in FIG. 12;

14 is a flowchart showing the contents of subroutine A in FIG.

FIG. 15 is a flowchart showing the contents of subroutine B in FIG.

16 is a flowchart showing the contents of a subroutine C in FIG.

[Explanation of symbols]

1 Board material 1a, 1b, 1c
Mold groove 2 Device body 3 Control box 4 Connection cable 5 Base 6 Tool head 7 XY table 8 Lifting arm 9 Tool motor 10 Rotary cutting blade (grooving tool) 11 X-direction moving body 12 Y-direction moving body 13 X Axis motor 14 Y-axis motor 15 Plate holding arm 16 Elevating motor 17 Display 18 Sewing data selection key 19 Output data selection switch 20 Start switch 21 Floppy disk drive device 22 Control unit (microcomputer) 23-26 Driver 31 Sewing data Selecting means 32 sewing data reading means 33 sewing data storing means 34 comprehensive data calculating means 35 comprehensive data storing means 36 output data selection switching means 37 output data selecting means 38 start signal detecting means 39 output data reading means 40 XY driving means

Claims (2)

(57) [Claims] 1. A sewing die groove forming apparatus for forming a die groove for releasing a needle in a plate material for holding a sewing material at the time of sewing by an electronic cycle sewing machine, wherein a relative position of the plate material with respect to a groove cutting tool is determined based on control data. X and Y orthogonal to each other in a plane parallel to the plate
Mechanism for cutting the mold groove by moving in the direction, sewing data storage means for storing sewing data by the electronic cycle sewing machine, and comprehensive data creating means for creating comprehensive data including all stitch forming points from the sewing data. And an output data selection means for selecting one of the sewing data and the comprehensive data as control data for controlling the mechanism. 2. A comprehensive data creating means selects only data of a stitch forming point forming a comprehensive figure from a stitch forming point data group forming sewing data, and converts each selected data to the data. 2. The sewing die groove cutting device according to claim 1, wherein the data is rearranged so as to sequentially move the outer periphery of the comprehensive figure when the XY control is performed along the line.