JP4286964B2 - Sewing machine control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for a sewing machine that forms a hole (cut) in a sewing product by a punching means such as a scalpel mechanism and that also performs overlock sewing on a peripheral portion of the hole of the sewing product.
[0002]
[Prior art]
In general, a button hole (hereinafter referred to as an eyelet hole) consisting of a hole portion that is a drop-like hole and a continuous linear notch is formed in the cloth that is to be sewn, and the periphery of the eyelet hole of the cloth An eyelet over-locking machine is provided that automatically executes a series of over-lock stitches to form a seam.
Although not shown, the sewing machine includes a needle bar that is moved up and down and left and right by a drive mechanism in the arm unit, a looper that is provided below the needle bar of the bed unit and is driven synchronously with the needle bar, and a bed unit The sewing machine includes a feed base that is provided on the sewing machine and is moved by a feed mechanism, and a presser that presses the cloth against the feed base.
[0003]
In addition, the bed portion includes a knife corresponding to the shape of the eyelet hole and a knife receiving portion arranged to face the knife, and in a state where a cloth is arranged between the knife and the knife receiving portion, By moving one of the knife and the knife receiving portion toward the other, a knife mechanism is provided that forms an eyelet hole in the cloth.
In the sewing machine, each mechanism is controlled by a control device composed of a microcomputer, a eyelet is formed by a knife mechanism on the cloth fixedly set on the feed base, and the needle bar is used for the eyelet of the cloth. While the feed base (cloth) is moved so as to move along the periphery, the needle bar and the looper are driven by the drive mechanism to perform the over stitching. In addition, when performing over stitching on the eyelet portion of the eyelet hole (the arc-shaped portion of the drop-like hole portion), the looper and the needle bar are rotated about the vertical rotation axis so that the seam is radial. ing. This also allows the stitches formed on the left and right sides of the cut-in of the eyelet hole to be reversed on the left and right sides on the one side edge side and the other side edge side of the cut.
[0004]
When performing such a hole sewing, basically, a eyelet hole is first formed by a female mechanism which is a hole punching means, and thereafter, a needle bar, a looper, and a driving means for driving them are formed. A seam is formed by the sewing means. If the eyelet hole is first formed in this way, a seam is formed along the periphery of the eyelet hole of the cloth. And, making the eyelet hole before the over stitching is called a tip knife.
[0005]
However, depending on the type of cloth (for example, knit etc.), there are some that cannot be stitched well if the eyelet holes are drilled first, and in such cloths, the eyelet holes should be made in the cloth after stitching. It has become. In this case, make sure that there is a gap between the edge of the eyelet hole of the cloth and the seam part of the seam stitch so that the thread of the seam of the seam stitch is not cut when the eyelet hole is opened. , Overlock sewing is performed. In this case, the seam is slightly separated from the periphery of the eyelet hole of the cloth, but it becomes possible to perform the eyelet hole stitching even in the cloth such as knit. And it is called a rear knife to make a eyelet hole after over stitching.
[0006]
Conventionally, in such an eyelet stitching machine, various settings are made to indicate the pattern of stitches such as the shape of the length of the eyelet holes and the number of stitches (number of stitches). It was supposed to set whether to make a female. In the case of the front knife, the distance between the eyelet hole and the seam is set to be close, and in the case of the rear knife, the distance between the eyelet hole and the seam is set to be long.
[0007]
And in recent sewing machines, for example, a plurality of types of settings indicating a series of stitch patterns such as the length of eyelet holes are stored in advance, and by selecting one type of stitch pattern from these, Multiple settings could be made at once. Further, regarding the setting of the front knife and the rear knife, a selection switch for selecting the first knife and the rear knife is provided, and the first knife and the rear knife can be selected only by operating this selection switch. In addition, when the front knife and rear knife are determined by the selection switch, in the case of the first knife, the setting is automatically made to reduce the distance between the edge of the eyelet hole of the cloth and the seam, and in the case of the rear knife. The setting to increase the distance between the peripheral edge of the eyelet hole of the cloth and the seam is automatically performed.
[0008]
[Problems to be solved by the invention]
By the way, in a conventional sewing machine, it is necessary to perform an operation of selecting one data from a plurality of sewing pattern data stored in advance and an operation of a selection switch for selecting a leading knife and a trailing knife. It was complicated.
Also in the sewing machine control, simply selecting the sewing pattern data does not determine the distance between the edge of the eyelet hole of the cloth and the seam. The data for both the selection of the rear knife and the selection of the rear knife and the first knife must be input, and the processing is complicated.
[0009]
In addition, the distance between the edge of the straight part of the eyelet hole and the seam can be individually set to two types of distances determined by selecting the front knife or the rear knife with the selection switch. The distance between the peripheral edge of the part and the seam was only two types and could not be set individually. Therefore, the distance between the peripheral edge of the eyelet portion of the eyelet hole of the cloth and the seam cannot be set to an appropriate distance corresponding to the difference in the material such as the cloth (sewing material) and the thread. That is, since the distance between the peripheral edge of the eyelet portion of the eyelet hole of the cloth and the seam is not appropriate in response to the change of the material such as cloth or thread, there is a problem that an optimal sewing shape cannot be formed. there were.
[0010]
The present invention has been made in view of the above circumstances, and can easily select a sewing pattern including selection of a front knife and a rear knife, and can simplify control processing based on the sewing pattern. It is an object of the present invention to provide a control device for a sewing machine that can be used.
[0011]
[Means for Solving the Problems]
  A control device (8) for a sewing machine according to claim 1 of the present invention comprises:
  Sewing means (for example, the needle 6, the needle bar 10, the looper portion 11a, the looper base 11 and the like) for performing over-stitching of a hole (for example, eyelet hole 16) such as a button hole on the workpiece (for example, the cloth 15). When,
  A control device for a sewing machine, comprising a hole punching means (for example, a movable knife 26) for opening the hole in the sewing product,
  Trailing data indicating whether a hole is to be drilled before or after the over-stitching by the above-mentioned sewing means when the perforated means is used to perforate the workpiece.When,Pattern data indicating the sewing pattern for over stitchingAnd a straight female space and a eyelet female space as distance data indicating the distance between the edge of the hole to be drilled in the punching means and the seam,Storage means (for example, RAM 33) storing a plurality of types of control data each including
  Selection means (for example, the operation panel 7) for selecting one control data from a plurality of types of control data stored in the storage means;
  Based on the control data selected by the selection means, it is determined which of the over-stitching or perforation is to be performed first, and over-stitching to the sewing product by the above-mentioned sewing means and the perforation means based on this determination Control means (for example, CPU 32) for making a hole in the sewing product by
  Change means (for example, operation panel 7) for individually changing the straight female space and the eyelet female space as the control data selected by the selection means,
  The control means controls the sewing means and the punching means based on the changed control data when the control data is changed by the changing means.It is characterized by.
[0012]
According to the above configuration, by selecting one control data from a plurality of types of control data, based on the trailing data indicating the leading knife or the trailing knife and the pattern data indicating the sewing pattern included in the control data. When the front knife or the rear knife is determined, the stitch pattern is determined, and the operation of the sewing machine can be facilitated.
In addition, the pattern data indicating the stitch pattern included in the control data is determined by the trailing edge data included in the same control data as the leading knife or the trailing knife. The distance from the seam can be determined for either the front knife or the rear knife. Therefore, the stitch pattern is determined only by selecting the control data, and the control process can be facilitated.
[0013]
Further, a plurality of control data having the same data (including rear end data) other than the distance between the peripheral edge of the hole of the workpiece to be stitched and the stitches of the over stitch is stored (for example, the rear knife and the same shape of the eyelet hole). In these control data, if the distance between the peripheral edge of the hole of the sewing product and the stitch of the seam is different, the properties of the material such as the sewing product and thread (size, thickness, etc. Corresponding to the difference in characteristics such as softness, it is possible to make the distance between the peripheral edge of the hole of the sewing object and the seam of the over stitching appropriate.
[0015]
According to the above configuration, the contents of the control data can be changed by the changing means, and in particular, since the distance data indicating the distance between the edge of the hole opened in the hole making means and the seam can be changed, Even if the distance data is not set differently depending on the material to be sewn or thread, by changing the distance data by the changing means, the properties (thickness and thickness) of the material to be sewn or thread can be changed. It is possible to make the distance between the peripheral edge of the hole of the workpiece to be stitched and the seam of the over stitching appropriate, corresponding to the difference in size (such as size and characteristics such as softness).
[0016]
  Claims of the invention2The control device for the sewing machine according to claim 11In the sewing machine control device described in 1), based on the trailing data of the control data selected by the selection means, the display means (for example, the leading knife rear knife display section 44) provided in the sewing machine is perforated. The display control means (for example, CPU32) which performs the display which shows whether it is performed before or after sewing is provided.
  According to the above configuration, the claims1When the control data is selected and the rear knife or the leading knife is determined, and there is no selection switch for selecting the trailing knife or the leading knife, the operator can Although it is not possible to determine whether the current setting is the rear knife or the leading knife just by looking at the appearance of the sewing machine, the current setting is displayed on the sewing machine display means based on the control data selected by the display control means. Since the first knife or the rear knife is displayed, the operator can determine whether the current setting is the first knife or the rear knife only by looking at the display means of the sewing machine.
[0017]
In other words, if there is a selection switch for selecting the rear knife or the front knife, it can be determined whether the current setting is the first knife or the rear knife by looking at the selection switch. Since the first knife or the rear knife is determined only by selecting the data, it is not necessary to provide the selection switch, and it cannot be determined whether the current setting is the first knife or the rear knife. By providing display means for displaying whether the current setting is the rear knife or the first knife, the current setting can be easily recognized.
[0018]
In addition, by displaying whether the current setting is the first knife or the rear knife on the display means in this way, it is possible to prevent selection mistakes that make a mistake between the settings of the rear knife and the first knife when selecting control data. During sewing work, it is possible to prevent misunderstanding whether the rear knife is being set or the tip knife is being set.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A sewing machine control apparatus according to an example of an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows an eyelet sewing machine provided with this example sewing machine control device, and FIG. 2 is a block diagram showing the relationship between this sewing machine control device and each part of the sewing machine.
[0020]
As shown in FIGS. 1 and 2, the sewing machine 1 provided with the control device of this example has a basic configuration as a sewing machine that performs eyelet hole stitching.
The sewing machine 1 includes a bed portion 2 having a substantially rectangular box shape, a vertical trunk portion 3 provided at the rear portion of the bed portion 2, and an arm portion 4 provided to extend forward from the vertical trunk portion. And a sewing machine table on which the sewing machine body 5 is placed. The sewing machine 1 includes an operation panel 7 and a control device 8 which will be described later, but these may be provided on the sewing machine body 5 side or on the sewing machine table side.
[0021]
The sewing machine table is provided with, for example, a stepping start switch 9 (shown in FIG. 2). A needle bar 10 provided with a sewing needle 6 at the lower end is provided at the distal end of the arm 4 so as to extend downward and to be movable up and down and to the left and right. Further, the bed portion 2 is provided with a looper base 11 having a looper portion 11a having a looper (not shown and a spreader for assisting the looper) on the upper side, facing the needle bar 10. In the sewing machine body 5, there are provided drive mechanisms for moving the needle bar 10 up and down and left and right and driving the looper and spreader in synchronism therewith as follows.
[0022]
That is, in the bed portion 2, the main shaft servomotor 12 is connected to a lower shaft (not shown) for driving the looper and the spreader, and the lower shaft is rotationally driven. The looper and the spreader are connected to the lower shaft via a looper driving mechanism and a spreader driving mechanism (not shown). The lower shaft is connected to the upper shaft in the arm portion 4 via a transmission mechanism having a timing belt, and is transmitted from the lower shaft to drive the upper shaft.
The upper shaft is connected to the needle bar 10 via a needle bar vertical drive mechanism and a needle bar swing mechanism (not shown) so as to drive the needle bar 10 up and down and swing left and right.
[0023]
The needle bar 10 and the looper base 11 are connected to a rotation mechanism having a Z-axis pulse motor 14 (shown in FIG. 2) and a transmission means having a timing belt. Synchronously, it rotates around a vertical rotation axis. As shown in FIG. 5, this is because the eyelet portion 17 of the eyelet hole 16 of the cloth 15 described later (the semicircular portion of the drop-like hole 16a of the eyelet hole 16, that is, the linear shape of the drop-like hole 16a). This is a mechanism for making the seams radiate when sewing the periphery of the periphery of the notch 16b on the opposite side. Further, as described above, the needle bar 10 and the looper base 11 that are rotated by the rotation mechanism are detected by the Z-axis origin sensor 24 (shown in FIG. 2) whether or not they are at the origin position. Yes.
[0024]
A feed base 18 (shown in cross section in FIG. 1) on which the cloth 15 is set is provided on the upper surface of the bed portion 2, and a pair for pressing the cloth 15 is provided on the upper surface portion of the feed base 18. The cloth presser 19 (shown in the raised state) is provided. The feed base 18 has a thin rectangular box shape with an open lower surface as a whole, and an upper opening is provided on the upper surface between the pair of cloth pressers 19 in the front-rear direction. The feed base 18 is moved in the X direction (left and right) by a feed mechanism including an X-axis pulse motor 20 (shown in FIG. 2) and a Y-axis pulse motor 21 (shown in FIG. 2) provided in the bed 2. Direction) and Y direction (front-rear direction).
Further, the feed base 18 moved by the feed mechanism as described above is determined by the X-axis origin sensor 22 (shown in FIG. 2) and the Y-axis origin sensor 23 (shown in FIG. 2) as to whether or not it is at the origin position. It is to be detected.
[0025]
In addition, the sewing machine 1 is provided with a knife mechanism that is a hole punching means for opening the eyelet hole 16 in the cloth 15. The knife mechanism includes a knife cradle (not shown) provided on the bed 2 side, a movable knife 26 provided on the upper side of the knife cradle (not shown), and a movable knife 26 that can be moved up and down. And a knife driving mechanism provided with a cloth cutting cylinder 27 (shown in FIG. 2, air cylinder) for movement. In the knife mechanism of this example, the movable knife 26 does not move up and down along the arc, but moves up and down linearly.
The cloth cutting cylinder 27 is connected to a cylinder drive electromagnetic valve 28 for operating the cloth cutting cylinder 27. The knife mechanism pushes the cloth 15 down by lowering the movable knife 26 toward the knife holder while the cloth 15 is set between the knife holder and the movable knife 26.
[0026]
Although explanation and illustration are omitted, the sewing machine 1 includes an actuator that drives the presser foot 19, a thread trimmer, an actuator that drives the thread trimmer, a sensor that detects the operation of these actuators, and the like. Is provided. In the sewing machine 1, the movement of the feed base is made of movement in the X direction and the Y direction. However, the movement of the feed base is a radial direction (r direction) and an arc direction (θ direction determined by the angle). It may be.
Further, in the configuration of the sewing machine 1 described above, the needle bar 10 provided with the needle 6, a mechanism for driving the needle bar, a looper and a spreader, a mechanism for supporting and driving the needle bar 10, a feed base 18, and the driving base 18 are driven. The mechanism for performing sewing, the presser foot 19 and other mechanisms associated therewith serve as sewing means for performing over stitching. The knife mechanism serves as a punching means for opening the eyelet hole 16.
[0027]
Next, the configuration and function of the sewing machine control apparatus will be described with reference to the block diagram of FIG.
First, as a basic configuration of the control device 8, a program for controlling the sewing machine in advance, a ROM 31 in which data used in the program is stored, data read from the ROM 31, and input or set from the operation panel 7. And a RAM 33 for storing data calculated by a CPU 32 to be described later based on the data and the program, and the CPU 32 for performing various processes based on the program.
The ROM 31 stores a program for causing the CPU 32 to perform processing in the CPU 32 from setting of a sewing pattern, which will be described later, to drilling and over stitching. In the RAM 33, nine types of control data including patterns No. 1 to No. 9 are stored as shown in FIG.
[0028]
Note that the control data will be described with reference to FIG. 5 showing a basic pattern of eyelet hole stitching, and a hole length corresponding to a portion indicated by an arrow a (length of the eyelet hole 16); The number of stitches in the straight portion of the eyelet hole corresponding to the portion indicated by arrow b, the number of stitches in the eyelet portion 17 corresponding to the portion indicated by arrow c, the trailing data indicating whether the leading knife or the trailing knife, and the arrow A straight female space d indicating the distance from the peripheral edge of the eyelet hole 16 of the cloth 15 to the position of over stitching in the straight line part indicated by b, and a eyelet hole of the cloth 15 in the eyelet part 17 corresponding to the part indicated by the arrow c The eyelet female space e indicating the distance from the peripheral edge of 16 to the position of over stitching. That is, a set of these six items of data is one control data.
In addition, the said linear part is a part except the semicircular part of the drop-shaped hole among the peripheral edges of an eyelet hole, and the peripheral edge of this part is substantially formed from a plurality of straight lines (actually The vicinity of the eyelet portion 17 is an arc). Further, the data other than the trailing data in the control data is a parameter of the overlock stitching pattern, and is pattern data indicating the overlock stitching pattern. Each data has a data item No., 1 is the length of the hole, 2 is the number of needles in the straight part, 3 is the number of needles in the eyelet part, and 4 is the rear data (front knife / rear knife). Reference numeral 5 is a straight female space, and 6 is a female eyelet space. And at least partly different control data of these data is stored in the RAM 33, and numbers from pattern No. 1 to pattern No. 9 are given to each control data.
[0029]
When the control data selected as described later among the control data stored in the RAM 33 is changed as described later, the changed control data is stored again. The RAM 33 stores stitch data including data such as coordinates of needle drop points calculated from the control data as described later. The program data stored in the ROM 31 may be read out and executed in the RAM 33.
[0030]
The CPU 32 reads one control data from the control data stored in the RAM 33 and inputs data for changing the control data from the operation panel 7 based on the input from the operation panel 7 when the eyelet hole 16 is stitched. In this case, a process of rewriting the control data stored in the RAM 33 is performed.
Next, stitch data is created from the control data stored in the RAM 33.
When a signal instructing the start of sewing is input from the start switch 9 connected to the CPU 32 via the interface 35, the needle bar 10, the looper, the spreader, etc. are driven to move up and down, left and right, and rotate. A process for controlling the various drive mechanisms to perform over stitching is performed.
In the above processing, although not described in detail, the CPU 32 confirms the operation of various members by various sensors provided in the sewing machine, the presser drive accompanying the overlock stitching, the thread trimmer drive, and other members. The process which controls the drive of is performed.
[0031]
Then, the CPU 32 of the control device 8 that performs the processing as described above is connected to the operation panel 7 via the interface 35 as shown in FIG. 2 and selects control data based on data input from the operation panel 7. Make changes. Further, the CPU 32 is connected to a servo motor drive circuit 36 for driving the spindle servo motor 12 via the interface 35, and controls the rotation of the spindle servo motor 12 so that the needle bar and looper including the upper axis and the lower axis are controlled. And, the operation of the needle bar 10, the looper and the spreader is controlled via the drive mechanism of the spreader.
[0032]
The CPU 32 is connected via an interface 35 to pulse motor drive circuits 37 and 38 that respectively drive the X-axis pulse motor 20 and the Y-axis pulse motor 21 provided in the feed mechanism of the feed base 18. The operation in the X-axis direction and the Y-axis direction is controlled. The CPU 32 is connected via an interface 35 to a pulse motor drive circuit 39 that drives a Z-axis pulse motor 14 that rotates the needle bar 10 and the looper base 11 in order to make the stitches radiate at the eyelet portion 17. The rotation of the needle bar 10 and the looper base 11 is controlled. Further, the CPU 32 is connected to the X-axis origin sensor 22 and the Y-axis origin sensor 23 for detecting the origin position of the feed base 18 via the interface 35, and determines whether or not the feed base 18 has returned to the origin position. Is input, and control based on the signal is performed.
[0033]
The CPU 32 is connected to a Z-axis origin sensor 24 that detects whether or not the rotation angle of the needle bar 10 and the looper base 11 is the origin position via the interface 35. A signal indicating whether or not the rotation angle is restored is input, and control based on the signal is performed. The CPU 32 is connected to a cylinder driving electromagnetic valve 28 for driving the cloth cutting cylinder 27 for driving the movable knife of the knife mechanism via the interface 35, and controls the formation of the eyelet hole 16 by the knife mechanism.
[0034]
Next, an operation panel 7 for an operator to select and change control data will be described with reference to the drawing showing the operation panel 7 in FIG.
The operation panel 7 includes a control data selection unit 41 for selecting one control data from a plurality of control data, a control data change unit 42 for changing data of each item of the selected control data, and a control When the data is set, when the above-mentioned stitch data is calculated based on the set control data, that is, when the CPU 32 performs an operation for preparing for sewing, When one control data is selected, a front knife rear knife display unit 44 is provided for displaying whether the trailing data of the control data is the first knife or the rear knife.
[0035]
Then, the control data selection unit 41 includes the control data display unit 41a indicating the currently selected control data with the above pattern No. and the control data No. displayed on the control data display unit 41a each time the control data is pressed. The pattern plus switch 41b that changes the control data selected by adding 1 and the control data No. displayed on the control data display section each time the key is pressed are subtracted 1 to change the selected control data. And a pattern minus switch 41c.
[0036]
In addition, the control data changing unit 42 includes a data item display unit 42a that indicates which data item of a plurality of data items in the control data is to be changed by a data item number. A data item plus switch 42b for changing the data item selected by adding 1 to the data item No. displayed on the data item 42a, and a data item No. displayed on the data item display unit 42a each time it is pressed. A data item minus switch 42c that changes the data item selected by subtracting 1;
[0037]
Further, the control data changing unit 42 displays the data of the data item corresponding to the data item No. displayed on the data item display unit 42a among the control data of the pattern No. displayed on the control data display unit 41a. A data display unit 42d, a data plus switch 42e that changes the value of the data by adding 1 to the lowest digit of the data displayed on the data display unit 42d each time it is pressed, and a data display unit each time it is pressed A data minus switch 42f that changes the data value by subtracting 1 from the lowest digit of the data displayed in 42d, and a data setting switch 42g that instructs to change and update the selected control data. Yes.
[0038]
Next, with reference to the flowchart of FIG. 7, the processing in the CPU 32 from the setting of the control data to the cutting of the eyelet hole and the overlock stitch will be described.
First, it is determined whether or not a signal indicating that the pattern plus switch 41b and the pattern minus switch 41c on the operation panel 7 are pressed is input (step A1). If a signal is input, the pattern plus switch 41b and The pattern number is updated in response to the operation of the pattern minus switch 41c, and the updated pattern number is displayed on the control data display unit 41a (step A2). When the pattern number is not updated and when the pattern number is not updated, the control data display unit 41a displays the pattern number selected in the last over stitching or the default pattern number. It is displayed. The changed pattern number or the unchanged pattern number is stored in the RAM 33.
[0039]
Next, it is determined whether or not the data setting switch 42g is pressed when the pattern plus switch 41b and the pattern minus switch 41c are not pressed or when the pattern number is updated as described above (step A3). When the setting switch 42g is pressed, a data setting process (data changing process) described later is performed (step A4). That is, processing for changing data of one or a plurality of data items among a plurality of data items included in one control data selected from the plurality of control data stored in the RAM 33 is performed.
Next, when the data setting switch 42g is not pressed or when the data setting process is completed, it is determined whether or not the preparation switch 43 has been pressed (step A5). If it is not pressed, the process returns to step A1.
[0040]
That is, the pattern number can be changed at any time by pressing the pattern plus switch 41b and the pattern minus switch 41c until the preparation switch 43 is pressed, and the pattern number is indicated by pressing the data setting switch. Data of any data item in one control data can be changed. Then, by pressing the preparation switch 43, the process of selecting one control data from a plurality of previously stored control data and the process of changing the data in the selected control data are completed.
[0041]
When the preparation switch 43 is pressed as described above, the control data is confirmed, and the confirmed control data is stored in the RAM 33.
[0042]
Then, stitch data is created based on the determined control data (step A6). At this time, with respect to the previously registered female shape shown by the solid line of the eyelet hole 16 shown in FIG. 8, the straight line female space and the broken line portion offset by the data setting value of the eyelet female space are used. The stitch shape shown is calculated. In FIG. 8, the point O is the origin position of the XY coordinates, the point A is the start point of the seam path of the straight cut 16b portion of the eyelet hole 16, and the point B is the end point of the seam of the cut 16b portion. That is, it is a point between the straight cut 16b and the drop-like hole 16a at the seam around the eyelet hole 16, and the point C is straight with the arc-shaped portion of the seam outside the drop-like hole 16a. The point D and the point E indicate a start point and an end point of the seam corresponding to the above-described eyelet portion 17. The point C is obtained by obtaining a tangent passing through point B of a circle including a semicircular seam outside the eyelet portion 17 and obtaining an intersection of the tangent and the circle. Further, the F point corresponding to the C point between the E point and the H point (the end point of the stitch) is also obtained in the same manner. Therefore, point A, point B, point G, and point H are offset by a straight female space with respect to the female shape, and points C, D, E, and F are eyelet female spaces with respect to the female shape. Will be the point offset by only. Furthermore, the female space between the B point and the C point is determined by a straight stitch line connecting the B point and the C point. Similarly, the female space between the F point and the G point is F and G. It is determined by the seam line on the straight line connecting the points.
[0043]
Then, the amount of movement in the Y direction from the point A to the point D is first obtained with respect to the stitch path as indicated by the broken line portion. Here, the Y coordinate (position in the Y axis direction from the origin O) of each needle drop point is obtained by equally dividing the movement amount in the Y axis direction from the point A to the point D by the number of needles in the linear portion. With respect to the obtained Y coordinate, the X coordinate (position in the X-axis direction from the origin O) on the straight seam indicated by the broken lines from point A to point B and from point B to point C is calculated. Further, the X coordinate on the arc-shaped seam indicated by the broken line from the point C to the point D is calculated with respect to the Y coordinate obtained as described above.
In addition, from D to E on the semicircular seam corresponding to the eyelet part 17, the XY coordinates are calculated by equally dividing the semicircular seam according to the number of eyelets.
[0044]
In addition, from the point E to the point F, the XY coordinates are obtained in the same manner (in the reverse direction) from the point A to the point D described above. Further, the rotation angle (Z rotation amount) at each position of the needle bar 10 and the looper base 11 is 0 degree from the A point to the D point, 180 degrees from the E point to the H point, and D corresponding to the eyelet portion 17. From point E to point E, an angle obtained by equally dividing 180 degrees by the number of eyelet needles is defined as a rotation angle. By calculating the difference between the XY coordinates of each needle drop point and the Z rotation angle from the XY coordinates of each needle drop point thus obtained and the rotation angles of the needle bar 10 and the looper base 11, each needle drop point is calculated. The XY movement amount and the Z rotation amount between the points are obtained, and these are collected in the data table T and stored in the RAM 33 as the X movement amount, the Y movement amount, and the Z rotation amount as shown in FIG.
[0045]
Next, the feed base 18 is moved to the origin position, and the needle bar 10 and the looper base 11 are rotationally moved to the origin position (origin angle) (step A7). Then, it is determined whether or not the start switch 9 is turned on (step A8). That is, it will be in a standby state until the start switch 9 is pushed. When the start switch 9 is pressed, it is determined whether or not the trailing data of the set control data is the leading knife (step A9). If the trailing edge data is the leading knife, the eyelet hole 16 is formed before the stitching by driving the knife mechanism (step A10).
[0046]
When the rear end data is the rear knife or when the formation of the eyelet hole 16 is finished, the feed base 18 is moved to the sewing start position (step A11). Then, the needle bar 10, the looper, the spreader, the feed base 18 and the like are driven to perform the eyelet stitching operation (step A12). Next, after overlock sewing is completed, the feed base 18 is returned to the origin position, and the rotation angles of the needle bar 10 and the looper base 11 are returned to the origin position (step A13).
[0047]
Next, it is determined whether or not the trailing data of the set control data is a trailing knife (step A14). If the trailing edge data is the trailing knife, the eyelet 16 is formed after the needle mechanism is driven and overlock stitching is performed (step A15). Then, when the trailing data is the leading knife or when the formation of the eyelet hole 16 is completed, the process returns to step A8 and enters a standby state until the start switch 9 is pressed. The next eyelet stitching is performed by repeating the above operation.
[0048]
Next, the data setting process described above will be described with reference to the flowchart of FIG. In step A3 of the flowchart of FIG. 7, when the data setting switch 42g is pushed, the control data corresponding to the pattern number displayed on the control data display unit 41a at that time is read from the ROM 31 to the RAM 33. It is in a state. In the data setting process, the data item No. is set to 1 as a default value (step B1), and this data item No. is displayed on the data item display unit 42a. Then, the data of data item No. 1 is read and displayed on the data display unit 42d.
[0049]
In this state, it is determined whether or not the data plus switch 42e or the data minus switch 42f is operated (step B2). If operated, the data stored in the RAM 33 is rewritten based on the operation of the switch. (Step B3). At this time, the display of the data display unit 42d is also changed. In data rewriting, as described above, every time the data plus switch 42e or the data minus switch 42f is pressed, the lower one digit of data is added or subtracted one by one. In changing the front knife and the rear knife, for example, the first knife is set to 1, the rear knife is set to 2, and 1 is added or subtracted by adding or subtracting 1.
Next, it is determined whether the data plus switch 42e or the data minus switch 42f is not operated or whether the data item plus switch 42b or the data item minus switch 42c is operated when the data is rewritten (step B4). If it is operated, the data item number is updated (step B5).
[0050]
Then, it is determined whether or not the data item plus switch 42b or the data item minus switch 42c is not operated, or after the data item number is changed, the data setting switch 42g is pressed (step B6), and the data setting switch 42g. If is pressed, the updating of data is terminated and the data is determined (step B7), and the process proceeds to step A5 of the above-described process.
If the data setting switch 42g is not pressed, the process returns to step B2, and if the data item No. is updated, the data of the updated data item No. can be changed. If is not updated, the data of the same data item number as before can be changed.
[0051]
That is, in the data setting process, the data item No. can be arbitrarily changed and the data of the arbitrary data item No. can be changed until the data setting switch 42g is pressed again.
According to the control device for a sewing machine as described above, the formation of the over stitch pattern and the eyelet hole 16 is made before the over stitch by simply selecting one control data from a plurality of previously stored control data. It will be decided whether to do it later. Therefore, the operation of the sewing machine can be facilitated, and the control data setting process in the control device can be facilitated.
[0052]
Further, according to the control device of the sewing machine of this example, all data included in the control data can be changed, including the female space data of the linear portion and the eyelet portion that can be individually set as described above. It is also possible to set finer control data corresponding to the types of materials such as cloth and thread (including differences in thickness, thickness, etc. in addition to material differences) By optimizing the setting of the space or the like, it is possible to carry out eyelet stitching with a more preferable sewing shape.
[0053]
Also, in this example, by selecting one control data from multiple control data, it is possible to determine the rear knife or the front knife, so there is no changeover switch for switching between the first knife and the rear knife, and the operator switches Checking the switch status, whether the data setting is performed with the first knife, the rear knife, whether the sewing machine is currently operating with the first knife, or the sewing machine operates with the rear knife. Cannot determine if it is working. However, in this example, since there is the front knife rear knife display section 44, it is possible to determine whether the current setting is the rear knife or the tip knife by looking at this.
[0054]
Therefore, by selecting one type of control data from multiple types of control data, it is possible to determine the leading knife and trailing knife at the time of data setting, even if the leading knife or trailing knife is determined, It is possible to prevent mistakes between the front knife and the rear knife during the operation of the sewing machine.
In FIG. 6, the front knife rear knife display section 44 has LED lights below the portion that is fixedly displayed as “tip knife” and below the portion that is fixedly displayed as “rear knife”. The light emitters 44a and 44b are arranged. When the setting is the front knife, the light emitter under the “front knife” is made to emit light, and when the setting is the rear knife, the light emitter under the “rear knife” is made to emit light. However, the display of the front knife rear knife display unit 44 is not limited to this. For example, the first knife rear knife display unit 44 is used as an LCD display, and the characters are “rear knife” or “first knife”. May be displayed.
[0055]
Further, in the creation of the stitch data in the above example, it has been described that the feed base 18 is moved in the X-axis direction and the Y-axis direction, but the movement of the feed base 18 is a straight line in the radial direction (r direction). Even when the movement and the movement in the arc direction by the angle θ are combined, the stitch data can be created in substantially the same manner.
[0056]
In addition, when changing the data of an arbitrary data item of the control data, every time the data plus switch 42e and the data minus switch 42f are pressed, the last digit of the numerical value that is the data is added or subtracted one by one. For example, when a plurality of data that can be set in advance are determined, the order is assigned to each data, and the data plus switch 42e is pressed, the data is changed one by one according to the above order, and the data minus switch 42f is pushed. In this case, the data may be changed one by one in the reverse order of the above order.
[0057]
For example, the female space data may be as follows:
In case of tip knife -2 -1 0 1 2
Straight section female space -0.2 -0.1 0.0 0.1 0.2
Eyelet female space -0.4 -0.3 -0.2 -0.1 0.0
For rear knife
Straight section female space 0.0 0.1 0.2 0.3 0.4
Eyelet female space 0.0 0.1 0.2 0.3 0.4
The middle data is standard data, that is, data in previously stored control data, and the left and right sides are data candidates that can be changed. Therefore, before the data change, the third standard data from the left is set. Then, by operating the data plus switch 42e and the data minus switch 42f, one data can be selected from the five data here. Further, there is a negative numerical value as data of the female space, which is offset in a direction approaching the eyelet hole 16 with respect to a predetermined reference position of the stitch, and the positive data is obtained from the eyelet hole 16. It is offset in the direction of moving away.
[0058]
【The invention's effect】
According to the control device for a sewing machine according to claim 1 of the present invention, by selecting one control data from a plurality of types of control data, trailing data indicating the leading knife or trailing knife included in the control data; Based on the pattern data indicating the sewing pattern, the leading knife or the trailing knife is determined, and the stitch pattern is determined, so that the operation of the sewing machine can be facilitated.
In addition, the pattern data indicating the stitch pattern included in the control data is determined by the trailing edge data included in the same control data as the leading knife or the trailing knife. The distance from the seam can be determined for either the front knife or the rear knife. Therefore, the stitch pattern is determined only by selecting the control data, and the control process can be facilitated.
[0059]
  Claims of the invention1According to the sewing machine control device described in (1), the contents of the control data can be changed by the changing means, and in particular, the distance data indicating the distance between the edge of the hole opened in the drilling means and the seam can be changed. In the control data, even if the distance data is not set differently depending on the material such as the sewing object or thread, the distance data can be changed by the changing means to change the material such as the sewing object or thread. Corresponding to differences in properties (sizes such as thickness and thickness, and characteristics such as softness), it is possible to make the distance between the edge of the hole of the workpiece to be stitched and the seam of the over stitching appropriate. .
[0060]
  Claims of the invention2According to the control device for a sewing machine according to claim 1,1When the control data is selected and the rear knife or the leading knife is determined and there is no selection switch for selecting the trailing knife or the leading knife as in the control device for the sewing machine described in 1. However, it is not possible to determine whether the current setting is the rear knife or the leading knife just by looking at the appearance of the sewing machine. However, based on the control data for which the display control means is selected, the current setting is displayed on the sewing machine display means. Is displayed on the front knife or the rear knife, the operator can determine whether the current setting is the first knife or the rear knife only by looking at the display means of the sewing machine.
[0061]
In addition, by displaying whether the current setting is the first knife or the rear knife on the display means in this way, it is possible to prevent selection mistakes that make a mistake between the settings of the rear knife and the first knife when selecting control data. During operation, it is possible to prevent misunderstanding whether the rear knife is being set or the tip knife is being set.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing a sewing machine provided with a sewing machine control device according to an embodiment of the present invention.
FIG. 2 is a block diagram for explaining the control device of the sewing machine in the above example.
FIG. 3 is a chart showing the contents of control data used in the sewing machine control apparatus of the above example.
FIG. 4 is a diagram showing a memory area of control data stored in a ROM of the control device of the sewing machine of the above example.
FIG. 5 is a drawing of an eyelet stitching for explaining control data of the control device of the sewing machine of the above example.
FIG. 6 is a front view showing an operation panel of the sewing machine of the above example.
FIG. 7 is a flowchart for explaining processing of the control device of the sewing machine in the above example.
FIG. 8 is a drawing of eyelet stitching for explaining creation of stitch data in the control device of the sewing machine of the above example.
FIG. 9 is a drawing showing a data table of stitch data in the control device of the sewing machine of the above example.
FIG. 10 is a flowchart for explaining a data setting process of the control device of the sewing machine in the above example.
[Explanation of symbols]
6 stitches (part of sewing means)
7 Operation panel (selection means, change means)
8 Control device
10 Needle bar (part of sewing means)
11 Looper base (part of sewing means)
11a Looper (a part of sewing means)
15 Cloth (Sewing product)
16 Eyelet hole (hole)
18 Feeding base (part of sewing means)
19 Work clamp (part of sewing means)
26 Movable knife (part of drilling means)
31 ROM (storage means)
32 CPU (control means, display control means)
33 RAM (storage means)
44 Front knife rear knife display (display means)

Claims (2)

Sewing means for performing overlock sewing of a button hole or the like on the workpiece;
A control device for a sewing machine comprising a hole punching means for opening the hole in the sewing product,
When making a hole to be sewed by the above-mentioned punching means, trailing edge data indicating whether a hole is to be drilled before or after the overlock sewing by the above-mentioned sewing means, and a sewing pattern for the overlock stitching A memory storing a plurality of types of control data, each of which includes pattern data indicating a straight line female space and eyelet female space as distance data indicating the distance between the edge of the hole to be drilled in the hole punching means and the seam Means,
A selection means for selecting one control data from a plurality of types of control data stored in the storage means;
Based on the control data selected by the selection means, it is determined which of the over-stitching or perforation is to be performed first, and over-stitching to the sewing product by the above-mentioned sewing means and the perforation means based on this determination Control means for making a hole in the workpiece by
Changing means for individually changing the straight female space and the eyelet female space as the control data selected by the selecting means;
When the control data is changed by the changing means, the control means controls the sewing means and the drilling means based on the changed control data . The sewing machine control device according to claim 1,
Display control for causing the display means provided on the sewing machine to display whether the perforation is performed before or after the over stitching based on the trailing data of the control data selected by the selection means. A control device for a sewing machine comprising a means.

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