JPH08243275A - Computerized sewing machine - Google Patents

Abstract

PURPOSE: To let both the beginning and the end in sewing coincide with each other with no trial sewing made by providing a setting means setting a radius and the feed quantity of its pattern, and thereby correcting the radius and the feed quantity of its pattern by automatic operations when circular sewing is performed as closed arrangement patterns. CONSTITUTION: When a circular sewing mode is selected, a set screen for circular sewing is indicated in a display means 3, for example, when a round key 26 as a circular arrangement pattern selecting means of a kind of circular sewing is selected when a pattern is sewn along the circular arrangement pattern, the round key 26 is turned over so as to be indicated. The distance of circular sewing is indicated in a display section 37, the default value of the radius of a circle representing the distance of circular sewing is indicated in a display section 38, and this value can be changed by a decreasing key 29 and an increasing key 30. In this case, since the length of an unit pattern actually sewn is fluctuated depending on the kind of the pattern used and the kind of cloth used, the length of set sewing for the unit pattern based on which correction operations for the length of actual sewing is made, is thereby corrected by correction operations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer sewing machine having a normal sewing function and a circular sewing function.

[0002]

2. Description of the Related Art In conventional circular stitches that form a pattern along a circular array pattern, the start of sewing and the end of sewing cannot be well joined unless the relationship between the radius of the circular stitch and the length of the unit pattern is accidental. Therefore, the sewing machine user adjusted the radius of the circular stitch and the feed amount of the pattern while performing the trial sewing. Moreover, in the conventional circular stitching, the pattern can be sewn only along a simple circular array figure.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to have means for setting the radius of the circular stitch and the feed amount of the pattern when, for example, circular circular stitching is performed as a closed array figure. The radius of the circular stitch or the feed amount of the pattern is corrected by automatic calculation, so that the start of sewing and the end of sewing of the circular stitch match without trial sewing.
Further, by performing the sewing while moving the circular sewing attachment under the control of the XY drive mechanism, it is possible to continuously sew a pattern not only in a circular shape but also in an elliptical or parabolic array pattern. .

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention firstly relates to a computer sewing machine having a normal sewing function, a circular sewing mode selection for switching the sewing machine to a circular sewing mode at the time of operation. Means, a circular sewing attachment for rotatably guiding the cloth, a carriage to which the circular sewing attachment can be attached, an XY driving mechanism capable of XY driving the circular sewing attachment, and an arrangement pattern of the circular sewing. An array figure selecting means composed of a plurality of keys for selecting, an array figure specification setting means for setting dimensional specifications of the array figure, an amplitude amount setting means for setting an amplitude amount of the pattern selected by the pattern selecting means, and the pattern It is equipped with a feed amount setting means for setting the feed amount, There is provided a computer sewing machine to form a selected pattern on the fabric Te.

Further, in order to solve the above-mentioned problems of the prior art, the present invention provides, in the computer sewing machine, the arrangement figure specification setting means, when the arrangement figure is not a closed figure, a sewing start point on the arrangement figure. And the sewing length is set, and the dimensional specification of the array graphic is set when the array graphic is a closed graphic. When the array graphic is a closed graphic, the dimensional specification of the array graphic is calculated from the set dimensional specification. The first calculation means for calculating the circumference, and the correction calculation for the length of the unit pattern selected from the input result of the cloth type input key for inputting the selected pattern type, the set feed amount and the cloth type And a third calculation means for correcting the feed amount set to correct the length of the unit pattern calculated and corrected so that an integer number of unit patterns can be formed along the circular stitch pattern. Calculation There is provided a computer sewing machine comprising a stage.

In order to solve the above-mentioned problems of the prior art, the present invention further provides an array graphic in the computer sewing machine according to the first aspect, wherein the array graphic specification setting means is a graphic in which the array graphic is not closed. The upper sewing start point and the sewing length are set, and when the arrayed figure is a closed figure, the dimension specification of the arrayed figure is set. When the arrayed figure is a closed figure, the set dimension specification is set. The first calculation means for calculating the perimeter of the arrayed pattern from, and the length of the unit pattern selected from the input result of the cloth type input key for inputting the selected pattern type, the set feed amount and the cloth type And a fourth arithmetic means for compensating the sewing length or the circumferential length so that an integer number of unit patterns can be formed along the array figure. Mi It is intended to provide a down.

[0007]

According to the present invention, when, for example, circular circular sewing is performed as the first closed array pattern, there is provided means for setting the radius of the circular sewing and the feed amount of the pattern. The feed amount of the pattern or the radius of the circular stitch is corrected by automatic calculation, and the sewing start and sewing end of the circular stitch match without trial sewing. Secondly, by performing the sewing while moving the circular sewing attachment under the control of the XY drive mechanism, it is possible to perform circular sewing not only along the circular array figure but also along the elliptical or parabolic array figure.

[0008]

【Example】

(1) Schematic configuration of sewing machine The present invention will be described below with reference to examples. FIG. 1 is a perspective view of a sewing machine according to the present invention, and a front panel 2 of the sewing machine 1 is provided with a display device 3 in which a transparent touch panel and a liquid crystal display section are stacked. 4 is a carriage of the XY drive mechanism 40 (FIG. 5), which is a circular sewing attachment 5
(Fig. 3) can be attached. The start / stop key 6 is operated to start the stopped sewing machine and stop the operating sewing machine.

(2) Control block diagram of sewing machine Next, a control block diagram of the sewing machine of the present invention will be described with reference to FIG. A storage means ROM and a temporary storage means RAM are connected to the CPU 10 via an I / O bus. The storage means ROM is provided with a plurality of storage areas. When these storage areas are shown as independent storage means, the storage means ROM stores a control program for controlling the entire sewing machine. The ROM1 includes a circular stitching control program storage means ROM2 in which a program for controlling circular stitching, which will be described later, is stored.

Further, in the storage means ROM, fixed data storage means ROM3 in which fixed data necessary for executing the control program are stored, and pattern data storage means ROM in which seam data of a normal stitch pattern, pattern display data, etc. are stored.
4. Correction data storage means RO in which feed correction data corresponding to each pattern and cloth type is stored during circular sewing
It consists of M5 etc.

The storage device RAM comprises a working memory area for temporarily storing various data necessary for executing the control program.

A start / stop key 6 (hereinafter S / S key 6) is connected to the CPU 10 via an I / O bus.
As described above, the S / S key 6 starts the stopped sewing machine by the operation and stops the operating sewing machine.

Various drive circuits are connected to the CPU 10 via an I / O bus, and a sewing machine motor 12 is connected to the motor drive circuit 11.

The stepping motor drive circuit (SM drive circuit) 13 comprises a plurality of drive circuits for independently driving a plurality of stepping motors. The SM drive circuit 13 includes an amplitude stepping motor (amplitude SM) for controlling the amplitude of the sewing machine.
14 and a feed stepping motor (feed SM) 15 for feed control are connected, and these control an amplitude control mechanism 16 and a feed control mechanism 17.

An X drive stepping motor (X drive SM) 18 and a Y drive stepping motor (Y drive SM) 19 are connected to the SM drive circuit 13, and these motors drive an XY drive mechanism 40. The XY drive mechanism 40 drives and controls the circular sewing attachment 5 attached to the carriage 4 during circular sewing.

Further, a display device 3 is connected to the display control circuit 21, and in the present embodiment, the display device 3 comprises an LCD display portion and a transparent touch panel portion located in front of the LCD display portion, and a CPU.
10 is a display control circuit 2 which receives operation signals from various function keys.
1 is controlled so that the LCD display section displays various screen-related keys in addition to the various displays relating to sewing on the LCD display section.

The sewing mode selecting means 22 is a normal sewing mode selecting means 2 for selecting a normal sewing mode by an operation.
3. There is a circular sewing mode selection means 24 for selecting the circular sewing mode.

The I / O bus is connected with an array figure selecting means 25 comprising a plurality of keys for selecting an array figure of circular sewing. The array figure selecting means is a circular array figure selecting means 26 and an elliptical array figure. There are a selection means 27 and a parabolic array graphic selection means 28.

Array graphic specification setting means 2 is provided on the I / O bus.
In the present embodiment, for example, when the arrayed figure is a circle, its radius is set, and when it is an ellipse, the major axis is set in advance for an ellipse in which the ratio of its major axis to its minor axis is constant, and a parabola is connected. In the case of, as shown in FIG. 9, the sewing start point P along the parabola from the vertex P0 of the parabola whose shape is set in advance
1 and sewing length (from P1 to sewing end point P
The length along the parabola up to 2) is set. The values set by the array graphic specification setting means 29, 30 are stored in the temporary storage means RAM by operating the enter key 31. The cloth type input means 32 including a plurality of keys is used to input the cloth type and correct the difference in the feeding efficiency depending on the cloth type.

The pattern selecting means 33 selects a pattern to be sewn along the arrayed figure. The amplitude setting means 34 and the feed setting means 35 set the amplitude amount and the feed amount of the pattern selected in this order.

(3) Circular Sewn Attachment Next, the circular sewn attachment will be described with reference to FIGS. 3 and 4. The circular sewing attachment 5 (hereinafter referred to as an attachment) is made of a synthetic resin and has a mounting pin 5a and a pair of guide pins 5b. The mounting hole 4a formed in the carriage 4 and the pair of guide holes 4b engage with each other. It can be attached and removed elastically. The attachment 5 includes a pin 7, and the cloth 9 stabbed by the pin 7 during circular sewing is pressed by a center cap 8 attached to the pin 7 and is rotatably guided around the pin 7 with respect to the attachment 5. In FIG. 3, Rx is a circular distance.

(4) XY Drive Mechanism Next, the XY drive mechanism 40 will be described with reference to FIG. The XY drive mechanism is disposed on the base portion 43 of the sewing machine as shown in the figure. First, the Y-direction drive of the XY drive mechanism 40 will be described. The output of the Y drive stepping motor 19 is output via the gears 45 and 46 to the Y drive shaft 47.
To the Y drive shaft 47 and is fixed to the Y drive shaft 47.
8 is transmitted. The Y drive shaft 47 is pivotally supported by a pair of bearings 49.

A pair of timing belts 51 are stretched between the pair of pulleys 48 and the pair of opposite pulleys 50 which are arranged at the opposite positions. The pair of pulleys 50 are pivotally attached to shafts 53 provided on the pair of bearings 52, respectively.

Each of the pair of guide rods 54 has a guide member 5 attached thereto.
The Y guides 56 guided through 5 are connected to the pair of timing belts 51 by the pair of belt retainers 57, respectively, and the carriage 4 is moved by the Y drive stepping motor 19.
Drive in the Y direction according to the output of the.

Next, the X-direction drive of the XY drive mechanism 40 will be described. X drive stepping motor 18 (Fig. 2)
Is transmitted to the X drive shaft 64 via the vertical axis 61 and the bevel gears 62 and 63. The X drive shaft 64 is pivotally supported by a pair of bearings 49, a pulley 65 is fixed to a coaxial tip end thereof, and a timing belt 67 is hung between the pulley 66 and the opposite pulley 66. The pulley 66 is fixed to the other X drive shaft 68 rotatably supported by the pair of bearings 52, and the X drive shaft 68 is rotated in synchronization with the X drive shaft 64.

The X drive shafts 64, 68 are respectively threaded in a spiral shape, and the pair of carriage guides 69 engaged with the X drive shafts 64, 68 are provided with the X drive shafts 64, 6 respectively.
By rotating 8, the carriage body 70 connected to the carriage guide 69 is driven in the X direction.

(5) Circular stitching Circular stitching will be explained. When the circular stitching mode is selected, a circular stitching setting screen is displayed on the display device 3 as shown in FIG. In the case of sewing, when the circular key 26 as a circular array figure selecting means is selected by the type of circular, the circular key 26 is highlighted as shown in FIG.
"Circular distance" is displayed on the display, and the default value Rx of the radius of the circle that is "Circular distance" is displayed on the display unit 38. The values are the decrease key 29 and the increase key 30.
You can change it with.

In this case, the perimeter L of the circular array figure
Can be expressed by Equation 1 below.

[Equation 1]

On the other hand, assuming that the set sewing length of the unit pattern is S ′ and the sewing length of the unit pattern to be actually sewn is S (hereinafter, actual sewing length S), the actual sewing length S is The actual sewing length S can be expressed by Equation 2 below, where d is the variation correction value of the sewing length per unit pattern.

[Equation 2]

In this case, the set sewing length S'in this case is the feed pitches s1, s2, s3, ... In the example of the pattern shown in FIG.
The pattern used for circular sewing, which is given by the sum of si, ... Sn, is generally the same in feed pitch, and is set by the feed amount setting means 35. As described above, the value obtained by correcting the set sewing length S ′ according to the type of pattern and the type of cloth used is the actual sewing length S ′.
Becomes

Therefore, in order to prevent the unit pattern at the beginning of sewing and the unit pattern at the end of sewing from overlapping with each other in the circular stitch of this example, the circumferential length L of the circular array figure is divided by the actual stitch length S. The quotient N must be an integer.

In the present embodiment, the set stitch length S'of the unit pattern which is the basis of the correction calculation of the actual stitch length S after the correction for the unit pattern is corrected so that the quotient N becomes an integer. It was corrected by calculation. This correction may be made by correcting the feed amount of all the seams included in the unit pattern, or as another method, for example, by increasing or decreasing only the first feed amount or the last feed amount of the unit pattern, It is also possible to increase or decrease both the first feed amount and the last feed amount of the unit pattern in accordance with the above.

As another method, the perimeter L of the array graphic is determined without correcting the set sewing length S'of the unit pattern so that the quotient N becomes an integer, and thus the sewing length is determined in the case of the circular array graphic. The circular distance Rx to be corrected is corrected to a value close to the set value by the correction calculation.

(6) Circular Sewing Control Next, the circular sewing control will be described with reference to the flowchart of FIG. 13A and the related drawings. In FIG. 13A, Sn (n = 1, 2, 3, ...) Shows each processing step of control.

To perform circular sewing, the sewing machine is turned on before sewing, the attachment 5 is attached to the carriage 4 of the XY drive mechanism 40, the cloth 9 is stabbed on the pin 7 of the attachment 5, and the center cap 8 is used. Hold the cloth 9. When the circular sewing mode selection means 24 is operated on the sewing mode selection screen to select the circular sewing mode, the circular sewing program is started.

First, in S1, a circular sewing setting screen is displayed as shown in FIG. 6, and for example, when the circular key 26 as the circular array figure selecting means is selected with the type of circular as the array figure, as shown in FIG. The circular key 26 is highlighted and the selected array graphic is displayed on the display unit 36. Further, the "circular distance" is displayed on the display unit 37, and the default value of the radius of the circle is displayed on the display unit 38, which is 50 mm in this example.

In S2, the decrease key 29 and the increase key 30 as the arrangement figure specification input means are operated to set the radius of the desired circle. When the confirmation key 31 is pressed after the radius setting is completed, the set value is stored in the temporary storage means RAM.

When the ellipse key 27 as the ellipse array figure selecting means is selected in S1, the ellipse key is highlighted in FIG. 6 and, for example, "long diameter of ellipse" is displayed on the display unit 37 and the ellipse is displayed on the display unit 38. The default value of the major axis is displayed. As described above, in the present embodiment, in the case of an ellipse, an ellipse having a constant ratio of the major axis and the minor axis is prepared in advance. Therefore, in S2, the decrease key 29 and the increase key 30 are operated to change the major axis of the ellipse. When the value is set, the elliptical array figure specification is determined, and when the enter key 31 is pressed, the set value is stored in the temporary storage means RAM.

When the parabola key 28 as the parabola array figure selecting means is selected in S1, the parabola key 28 in FIG. 6 is selected.
Is highlighted. In this embodiment, the display unit 37 displays “length from apex” and then “sewing length”. In the case of a parabola, in this embodiment, as shown in FIG. 9, the length from the vertex P0 of the parabola whose shape is set in advance to the sewing start point P1 along the parabola and the sewing length (from P1 to the sewing end point P2). The length along the parabola up to) is set. In S2, the decrease key 29 and the increase key 30 are respectively operated to set desired values one by one, and when the enter key 31 is pressed, those set values are sequentially stored in the temporary storage means RAM.

In S3, it is checked whether the array graphic is a closed graphic. If the array graphic is a closed graphic, the process proceeds to S4, the array graphic data stored in the temporary storage means RAM is read out, and the perimeter of the array graphic is calculated. It When the arrayed figure is a circle, the perimeter is calculated by the above-mentioned formula 1. When the arrayed figure is an ellipse, the perimeter is geometrically calculated in the same manner. This S4 step constitutes the first calculation means.

Next, in S5, when the pattern to be sewn along the array pattern is selected by the pattern selecting means 33, the selected pattern is displayed on the display section 39 of FIG. 7, and then the amplitude amount and the feed amount are shown as shown in FIG. Display the setting screen in a window, set the amplitude amount with the increase / decrease key 34 while looking at the "sewing width" display portion, and set the feed amount with the increase / decrease key 35 while looking at the "seamlessness" display portion. . These set amounts are stored in the temporary storage means RAM.

Next, in S7, the type of cloth used for circular sewing is input by the cloth type input means 32 including a plurality of keys classified in terms of feed efficiency, and the process proceeds to S8. In S8, S
The actual sewing length S is corrected and calculated from the set sewing length S ′ of the unit pattern based on the three types of the pattern type selected in 5, the cloth feed amount set in S6 and the cloth type input in S7. This S
The 8 steps constitute the second arithmetic unit.

When the actual sewing length S is calculated in S8, S
9, the feed amount set in S6 is set so that the number of formations of the selected pattern becomes an integer with respect to the sewing length input in S2 or the circumferential length L of the array figure calculated in S4. Correction calculation is performed. In the present embodiment, the set stitch length S ′ of the unit pattern which is the basis for the correction calculation of the actual stitch length S after the correction for the unit pattern so that the quotient N becomes an integer is corrected by the correction calculation. I decided to do it. This correction may be performed by correcting the feed amount of all the seams included in the unit pattern as described above, or another method is to increase or decrease only the first feed amount or the last feed amount of the unit pattern, for example. Or
It is also possible to increase or decrease both the initial feed amount and the final feed amount of the unit pattern as required. This correction data is stored in the temporary storage means RAM. This S9 step constitutes the third arithmetic unit.

When the S / S key 6 is operated after the step S9 is finished, the sewing of S11 is executed, and in the example of the circular array figure, the circular sewing is performed by repeating the unit pattern along the circular array figure as shown in FIG. Formed, S1
When it is determined in 2 that the circular sewing is completed, the circular sewing is completed.

FIG. 13B shows another control example different from FIG. 13A. The difference between FIG. 13B and FIG. 13A is that step S9 in FIG. 13A is different. The other steps are similar except that the step S9 'is replaced. In FIG. 13B, instead of S9, the circumferential length L calculated in S4 based on the sewing length or the arrangement figure specification input in S2.
For the number of patterns to be formed selected, the sewing length or the calculated perimeter (in the example of a circle, the value of Rx that determines the perimeter) is corrected by the correction calculation so that the number of patterns formed is an integer.
This S9 'step constitutes the fourth arithmetic unit.

(7) Example of Circular Stitching FIG. 10 shows a state in which the circular stitching is performed along the circular arrangement pattern, and the pin 7 with the center cap 8 attached thereto.
Cloth 9 with a circular distance (radius) Rx centered on (Fig. 4)
The unit pattern is continuously formed on the top.

FIG. 11 shows an example of circular stitching in which unit patterns are continuously formed along two elliptical array figures having different major axes.

FIG. 12 shows an example in which a unit pattern is formed along a parabolic array figure. After the unit pattern is sewn for one cycle (angle Θ1) from the point P1 on the parabola, the attachment 5 is attached by the carriage 4. The unit pattern is formed along the parabolic array pattern by moving to the left in the X direction by x1 at the point and starting sewing the unit pattern from the next point P1 'on the parabola. From P1, the circular pattern is formed. Circular distance R1 '(R1 + from distances R1 and P2
Parabular circular sewing can be performed by sewing with x1).

In this case, the circular distance R1 is set equal to the distance to the instantaneous center of the point P1 on the parabola, and the circular distance R1 'is also set equal to the distance to the instantaneous center of the point P1' on the parabola.

Of course, depending on the pattern, it is possible to control the movement of the attachment 5 for each plurality of stitches, which makes it possible to expand the range of application of the circular stitches in terms of decorativeness.

Further, when performing circular sewing except the circular array figure, it is necessary to control the movement of the attachment 5 intermittently, so during movement control, a special type of embroidery press including control for releasing the presser foot pressure is used. Use the presser foot.

[0052]

As described above, according to the present invention, firstly, for example, when circular circular sewing is performed as a closed array figure, there is provided means for setting the radius of the circular sewing and the feed amount of the pattern. The feed amount of the pattern or the radius of the circular stitch of the set amount of is corrected by automatic calculation, and the sewing start and sewing end of the circular stitch match without trial sewing. Secondly, by performing the sewing while moving the circular sewing attachment under the control of the XY drive mechanism, it is possible to perform circular sewing not only along the circular array figure but also along the elliptical or parabolic array figure.

[Brief description of drawings]

FIG. 1 is a perspective view of a sewing machine.

[Figure 2] Sewing machine control block diagram

FIG. 3 is a view showing a mounting state of the circular sewing attachment.

FIG. 4 is a view on arrow A of FIG.

FIG. 5 is a perspective view of an XY drive mechanism.

[Figure 6] Array figure selection screen

[Fig. 7] Window display screen for amplitude and feed amount setting

FIG. 8 is a diagram showing a feed amount of a unit pattern, etc.

FIG. 9 is a diagram illustrating a parabolic array figure.

FIG. 10 is a diagram showing circular array figure circular sewing.

FIG. 11: Example of circular sewing of elliptical array figure

FIG. 12: Example of parabolic circular stitching

FIG. 13 (a) Flow chart

FIG. 13 (b) Flow chart

[Explanation of symbols]

 4 Carriage 5 Circular stitching attachment 24 Circular stitching mode selecting means 25 Arrangement pattern selecting means 29, 30 Arrangement pattern specification setting means 32 Fabric type input means 34 Amplitude amount setting means 35 Feed amount setting means 40 XY drive mechanism S4 First Arithmetic means S8 Second arithmetic means S9 Third arithmetic means S9 'Fourth arithmetic means

Claims (3)

[Claims] 1. In a computer sewing machine having a normal sewing function, a circular sewing mode selecting means for switching the sewing machine to a circular sewing mode during operation, and a circular sewing attachment for rotatably guiding a cloth.
The circular sewing attachment is provided with a carriage to which the circular sewing attachment can be attached, and an XY drive mechanism capable of XY driving the circular sewing attachment, and an array graphic selecting means including a plurality of keys for selecting an array graphic of the circular stitch, and the array graphic of the array graphic. An array figure specification setting means for setting dimension specifications, an amplitude amount setting means for setting the amplitude amount of the pattern selected by the pattern selecting means, and a feed amount setting means for setting the feed amount of the pattern are provided and set. A computer sewing machine which forms a selected pattern on the cloth along the arranged array pattern. 2. The computer sewing machine according to claim 1, wherein the arrayed figure specification setting means sets a sewing start point and a sewing length on the arrayed figure when the arrayed figure is not closed, and the arrayed figure is arranged. A first operation which is configured to set the dimension specification of the arrayed figure when the figure is a closed figure, and which calculates the perimeter of the arrayed figure from the set dimension specification when the figure is a closed figure Means, second calculating means for correcting the length of the unit pattern selected from the input result of the cloth type input key for inputting the selected pattern type, the set feed amount and the cloth type, and the circular A third calculation means for correcting the feed amount set to correct the length of the unit pattern corrected and calculated so that an integer number of unit patterns can be formed along the sewing pattern. Characteristic Con Yutamishin. 3. The computer sewing machine according to claim 1, wherein the arrangement figure specification setting means sets a sewing start point and a sewing length on the arrangement figure when the arrangement figure is not closed, A first operation which is configured to set the dimension specification of the arrayed figure when the figure is a closed figure, and which calculates the perimeter of the arrayed figure from the set dimension specification when the figure is a closed figure A second calculation means for correcting the length of the unit pattern selected from the input result of the cloth type input key for inputting the selected pattern type, the set feed amount, and the cloth type; A computer sewing machine comprising: fourth arithmetic means for correcting the sewing length or the peripheral length so that an integer number of unit patterns can be formed along the arrayed figure.