JP3767949B2 - Decorative stitch cutting method and cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for cutting decorative stitches formed on a sheet.
[0002]
[Prior art]
In general embroidery processing, a satin stitch or the like is formed directly on a work cloth such as clothing with an upper thread and a lower thread, so that a satin stitch or the like (mainly lower thread) also appears on the back surface of the work cloth. For this reason, when embroidery processing is performed on the underwear, there is a problem that satin stitches and the like are rubbed against the skin and the touch of the underwear is lowered.
[0003]
A general emblem is produced by forming a decorative stitch on a piece of felt or the like cut into a desired shape, and attaching the emblem piece to a work cloth such as clothes or sewing it with a satin stitch or the like. Therefore, when a patch piece is pasted, no satin stitch or the like appears on the back surface of the work cloth. However, in terms of decorative effects, not only decorative stitches but also patches such as felt can be seen, so that the appearance is considerably different from general embroidery processing.
[0004]
Therefore, recently, a technique has been studied in which a decorative stitch is formed on a sheet, the decorative stitch is cut out from the sheet, and the decorative stitch is pasted on an underwear or the like to make it look like a general embroidery process.
[0005]
[Problems to be solved by the invention]
However, at present, a method for efficiently cutting out decorative stitches formed on a sheet has not been developed, and there has been a problem that the efficiency is poor or the finish is not beautiful because there is no choice but to cut out manually.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus that can efficiently and neatly cut decorative stitches formed on a sheet.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the method of the present invention is a method of cutting out a decorative stitch formed on a heat-meltable sheet, wherein the tip of a heat cutter is formed between the contour edge of the decorative stitch and the heat-meltable sheet. Abutting on the boundary corner , offsetting the heat cutter to the inside of the decorative stitch and urging the tip of the heat cutter toward the boundary corner, the offset from the outer peripheral edge and the inner peripheral edge of the stitch data of the decorative stitch Based on the cut-out data created by offsetting the inside of the decorative stitch by the amount , the heat-meltable sheet or the heat cutter is attached to the contour edge of the decorative stitch while maintaining the contact state, the offset amount, and the biased state. The hot melt sheet is thermally fused along the contour edge of the decorative stitch. It is a symptom.
[0008]
The apparatus of the present invention is a device for cutting out decorative stitches formed on a heat-meltable sheet, and when the heat cutter for thermally fusing the heat-meltable sheet and the tip of the heat cutter are not subjected to external force The support means for supporting the heat cutter and the stitch data of the decorative stitch so as to be displaced in all directions around the reference point and urged toward the reference point when the external force is applied to the reference point . Moving means for relatively moving the heat-meltable sheet or the heat cutter along the contour edge of the decorative stitch based on the cutout data created by offsetting the decorative stitch inside from the outer peripheral edge and the inner peripheral edge ; It is characterized by having prepared.
[0009]
In these methods or apparatuses, the decorative stitch is not limited to a specific sewing method, and examples thereof include a satin stitch and a loop stitch.
[0010]
The support means is not limited to a specific structure, and supports the heat cutter so that it can swing or supports the heat cutter so that it can move in parallel via an elastic body such as rubber or elastomer that can give an urging force or a spring. And the like.
[0011]
The moving means may move the heat-meltable sheet or move the heat cutter.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in a decorative stitch cutting device incorporated in a multi-head embroidery sewing machine 1 as shown in FIG. 1 and a cutting method using the device will be described with reference to the drawings.
[0013]
1 and 2 show a multi-head embroidery sewing machine 1 used in the embroidery processing method. In the embroidery sewing machine 1, a planar rectangular drive frame 3 is arranged immediately above the table 2, and the drive frame 3 is driven front and rear and right and left by a frame drive device (not shown). The drive frame 3 can be provided with four embroidery frames 4 each having a hot-melt sheet 5 sandwiched between them.
[0014]
A bridge 6 is installed horizontally above the table 2, and four embroidery heads 7 are attached to a fixed position on the front side of the bridge 6. Each embroidery head 7 includes a plurality of needles 8 through which upper threads of different colors are passed, and one needle is selectively used by a color changing mechanism (not shown). In addition, four beds (not shown) are arranged at fixed positions of the table 2 corresponding to the lower portions of the embroidery heads 7, and a hook for supplying lower thread is built in each bed. The embroidery head 7 and the bed constitute a sewing device.
[0015]
As shown in FIGS. 3 to 5, four L-shaped brackets 20 are attached with screws 21 at a fixed position on the front side of the bridge 6 and on the right side of each embroidery head 7. Is supported in a substantially vertical position as follows.
[0016]
The heat cutter 10 is a well-known one, and includes a handle portion 11, a collar portion 12, a heater portion 13, and a tip portion 14 in order from the top in FIG. 3 and the like, and is thinned by an electric heater (not shown) built in the heater portion 13. The rod-shaped and sharp tip portion 14 is heated. Reference numeral 15 denotes a cord extending from the handle portion 11.
[0017]
A support plate 22 is disposed above the horizontal portion of the bracket 20. The guide bar 23 protrudes downward from the support plate 22 and penetrates the bracket 20. The guide bar 24 protrudes upward from the bracket 20 and penetrates the support plate 22. Thus, the support plate 22 can move up and down while maintaining a horizontal posture. Further, a position adjustment screw 25 is screwed onto the support plate 22, and the lower end of the position adjustment screw 25 abuts on the upper surface of the bracket 20, so that the upper and lower positions of the support plate 22 and thus the tip (lower end) of the tip portion 14 are located. The vertical position can be adjusted.
[0018]
As shown in FIG. 5, an insertion hole 26 and three support holes 27 around the insertion hole 26 are provided through the front half of the support plate 22. The heater portion 13 is inserted into the insertion hole 26 from above, and a support screw 28 is loosely inserted into the support hole 27 from below, and the support screw 28 is screwed into the protrusion 16 of the flange portion 12. Elastic plates 29 made of rubber, elastomer, or the like are interposed between the head of the support screw 28 and the support plate 22 and between the support plate 22 and the protrusion 16. The bracket 20, the support hole 27, the support screw 28, the elastic plate 29, etc. constitute the support means of the heat cutter 10.
[0019]
In the heat cutter 10 supported as described above, the tip of the tip portion 14 is at a reference point indicated by a solid line in FIG. 5 when receiving no external force. Further, when an external force is applied, the support screw 28 swings within the support hole 27 within the limit of elastic deformation of the elastic plate 29, whereby the tip portion 14 tilts as shown by a two-dot chain line in FIG. The tip of the tip portion 14 is displaced in all directions around the reference point and is urged by an elastic force toward the reference point.
[0020]
In the upper part near the right end of the table 2, stitch data is input / corrected / saved, cutout data to be described later is created based on the stitch data, and the frame driving device and the sewing device based on the stitch data or the cutout data. And a control device 31 is provided. The control device 31 includes a microcomputer (not shown) including a CPU, ROM, RAM, fixed disk device, connection bus, input / output interface, etc., a key input unit 32 for inputting various data, input data, operating conditions, etc. And a display unit 33 such as a CRT display or a liquid crystal display.
[0021]
Using the embroidery sewing machine 1 configured as described above, the decorative stitch 9 is formed on the heat-meltable sheet 5 and the decorative stitch 9 is cut out from the heat-meltable sheet 5 by the following method.
[0022]
(1) As shown in FIG. 2, the embroidery frame 4 sandwiched and stretched with the heat-meltable sheet 5 is attached to the drive frame 3. As the heat-meltable sheet 5, a resin sheet having a melting point lower than that of the upper thread and the lower thread is used.
[0023]
(2) The embroidery sewing machine 1 is operated based on the stitch data of the control device 31, and the embroidery frame 4 and the heat-meltable sheet 5 are driven via the drive frame 3 by the frame drive device. The decorative stitch 9 is formed on the heat-meltable sheet 5 by movement as shown in FIGS. The decorative stitch 9 of the present embodiment is composed of a circular satin stitch and a B-shaped satin stitch therein. Since the decorative stitch 9 is formed to a certain extent, a corner portion is formed at the boundary between the contour edge of the decorative stitch 9 and the heat-meltable sheet 5. When the stitch number is designated in the stitch data, automatic stitch number switching, that is, automatic color change of the embroidery head 7 is performed during operation to form a multicolor satin stitch.
[0024]
(3) By thermally fusing the hot melt sheet 5 along the contour edge of the decorative stitch 9 as shown in FIGS. Then, the circular and B-shaped decorative stitches 9 are cut out from the heat-meltable sheet 5. The details are as follows (1) to (5).
[0025]
(1) First, the embroidery frame 4 and the heat-meltable sheet 5 together with the drive frame 3 are moved from below the embroidery head 7 to below the heat cutter 10.
[0026]
{Circle over (2)} As shown in FIG. 8, for example, the left shoulder of the B-shaped decorative stitch 9 is the starting point of the thermal melting of the hot-melt sheet 5. In this case, the tip of the tip portion 14 of the heat cutter 10 is brought closer to the left shoulder of the decorative stitch 9 from the left. The tip portion 14 is heated to an appropriate temperature that is higher than the melting point of the heat-meltable sheet 5 but lower than the melting points of the upper yarn and the lower yarn.
[0027]
(3) As shown in FIG. 9, when the tip end of the tip portion 14 comes into contact with the boundary corner between the contour edge of the B-shaped decorative stitch 9 and the heat-meltable sheet 5, the heat cutter 10 (more specifically, the support The tip of the tip portion 14 is biased toward the boundary corner portion by offsetting the portion supported by the means to the inside of the stitch and tilting the tip portion 14 against the elastic deformation of the elastic plate 29. The offset amount S is not particularly limited and varies depending on the dimensions of the heat cutter 10.
[0028]
(4) The embroidery frame 4 and the heat-meltable sheet 5 are driven through the drive frame 3 by the frame driving device while maintaining the contact state, the offset amount S, and the biased state in (3) above, and FIG. As shown in FIG. 2, the heat-meltable sheet 5 and the heat cutter 10 are relatively moved along the contour edge of the B-shaped decorative stitch 9. Since the tip of the tip portion 14 heat-melts the heat-meltable sheet 5 along the contour edge of the decorative stitch 9, the B-shaped decorative stitch 9 can be cut out as shown in FIGS. 11 and 12. In addition, the heat-meltable sheet 5 is similarly heat-melted along the contour edge on the inner peripheral side of the B-shape.
[0029]
Cutout data for driving the drive frame 3, the embroidery frame 4, and the heat-meltable sheet 5 while maintaining the offset amount S as described above is obtained from the outer peripheral edge and the inner peripheral edge of the stitch data by the control device 31. It can be created automatically and easily by offsetting S inside the stitch.
[0030]
(5) Subsequently, as shown in FIGS. 11 and 12, the circular decorative stitch 9 is similarly cut out. A part 5 a of the heat-meltable sheet 5 remains in the cut out decorative stitch 9. The cut out decorative stitch 9 can be attached to a work cloth (not shown) such as underwear with an adhesive or the like.
[0031]
As described above, in this embodiment, the decorative stitch 9 formed on the heat-meltable sheet 5 can be efficiently cut out by the cutting device incorporated in the embroidery sewing machine 1. Further, since the tip of the tip portion 14 is urged so as to contact the boundary corner between the contour edge of the decorative stitch 9 and the heat-meltable sheet 5, the heat-meltable sheet 5 is beautiful along the contour edge of the decorative stitch 9. Can be heat-melted.
[0032]
Furthermore, in this embodiment, after the decorative stitch 9 is formed on the heat-meltable sheet 5 stretched on the embroidery frame 4, the heat-meltable sheet 5 is heat-melted in the stretched state, so that both operations are performed continuously. More efficient.
[0033]
The present invention is not limited to the above-described embodiment. For example, as follows, the present invention can be appropriately modified and embodied without departing from the spirit of the present invention.
[0034]
(1) Change the shape, type, etc. of the decorative stitch 9.
[0035]
(2) Changing the structure of the support means of the heat cutter. For example, FIG. 13 suspends the flange portion 12 of the heat cutter 10 and the upper end portion of the handle portion 11 with respect to the bracket 35 so as to be swingable by coil springs 38 and 39 via suspension tools 36 and 37, respectively. It is what I supported.
[0036]
(3) In the above embodiment, the cutting device is incorporated in the embroidery sewing machine 1, and the heat-meltable sheet 5 is moved using the drive frame 3 and the embroidery frame 4, but as shown in FIG. 41 may be used as a cutting device, the heat-meltable sheet 5 may be fixed to the board surface 42, and the heat cutter 43 may be moved by a driving device (not shown) with a built-in cutting machine. Of course, also in this case, the heat cutter 43 must be supported by the support means.
[0037]
【The invention's effect】
As described above in detail, the decorative stitch cutting method and the cutting device according to the present invention have an excellent effect that the decorative stitch formed on the sheet can be efficiently and cleanly cut.
[Brief description of the drawings]
FIG. 1 is a front view of a multi-head embroidery sewing machine incorporating a clipping device according to an embodiment of the present invention.
FIG. 2 is a plan view showing a drive frame and an embroidery frame of the sewing machine, a heat-meltable sheet and a decorative stitch of the embroidery frame.
FIG. 3 is a perspective view of a heat cutter assembled to the sewing machine.
FIG. 4 is a side view of the heat cutter.
FIG. 5 is a cross-sectional view of a support means of the heat cutter.
FIG. 6 is a plan view of a heat-meltable sheet and decorative stitches formed thereon.
7 is a perspective view taken along the line VII-VII in FIG. 6;
FIGS. 8A and 8B show a main part when the heat cutter first approaches the decorative stitch, where FIG. 8A is a plan view and FIG. 8B is a front view.
FIGS. 9A and 9B show a main part when the tip of the heat cutter comes into contact with a boundary corner between the contour edge of the decorative stitch and the heat-meltable sheet, FIG. 9A is a plan view, and FIG. 9B is a front view. .
FIGS. 10A and 10B show a main part when heat fusing of a heat-meltable sheet by a heat cutter proceeds, where FIG. 10A is a plan view and FIG. 10B is a front view.
FIG. 11 is a plan view of cut out decorative stitches.
12 is a perspective view taken along line XII-XII in FIG.
FIG. 13 is a cross-sectional view showing another example of the support means of the heat cutter.
FIG. 14 is a perspective view showing another example of the clipping device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Embroidery sewing machine 3 Drive frame 4 Embroidery frame 5 Heat-meltable sheet 7 Embroidery head 9 Decoration stitch 10 Heat cutter 14 Chip part 16 Projection part 20 Bracket 22 Support plate 27 Support hole 28 Support screw 29 Elastic plate 31 Control device 35 Bracket 36 Hanging Lower tool 37 Hanging tool 38 Coil spring 39 Coil spring 41 Cutting machine 43 Heat cutter

Claims (2)

A method of cutting out decorative stitches formed on a heat-meltable sheet, wherein a tip of a heat cutter is brought into contact with a boundary corner between a contour edge of the decorative stitch and the heat-meltable sheet, and the heat cutter is attached to the heat-meltable sheet. Cutout data created by offsetting to the inside of the stitch and urging the front end of the heat cutter toward the boundary corner, and offset the inside of the decorative stitch by the offset amount from the outer and inner peripheral edges of the stitch data of the decorative stitch Based on the above, while maintaining the contact state, the offset amount and the urging state, the heat-melting sheet or the heat cutter is moved relatively along the contour edge of the decorative stitch, thereby the heat-melting The decorative sheet is cut out by heat-melting the adhesive sheet along the contour edge of the decorative stitch. An apparatus for cutting decorative stitches formed on a heat-meltable sheet, wherein the heat cutter for thermally fusing the heat-meltable sheet and the tip of the heat cutter are at a reference point when they are not subjected to external force, and are subjected to external force The decoration means from the outer periphery and the inner periphery of the stitch data of the decorative stitch, and the supporting means for supporting the heat cutter so that the heat cutter is displaced in all directions around the reference point and biased toward the reference point. A decoration comprising a moving means for relatively moving the heat-meltable sheet or the heat cutter along the contour edge of the decorative stitch based on cut-out data created by being offset inside the stitch. Stitch cutting device.

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