JP2001162070A - Holing sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the selecting action of the desired holed stitches for sewing and to miniaturize a memory storing a plurality of sewing parameters used for sewing the holed stitches. SOLUTION: Zigzag stitch sewing parameters are set (S12) by the program number on zigzag stitches (S8: Yes), and the type of desired front bar tacking stitches is selected to set front bar tacking stitch sewing parameters (S13) by the program number on front bar tacking stitches (89: Yes). The type of desired rear bar tacking stitches is selected to set rear bar tacking stitch sewing parameters (S14) by the program number on rear bar tacking stitches (S10: Yes), then the holed stitches combined with the selected front bar tacking stitches and rear bar tacking stitches can be displayed (S7), the sewing data of holed stitches are generated (S17), and the holed stitches can be sewn (S18).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buttonhole stitch sewing machine, and more particularly, to selectively combine a front bar-tacking seam and a rear bar-tacking seam provided at both front and rear ends of a staggered seam to select the type of the buttonhole seam. Regarding what can be decided.

[0002]

2. Description of the Related Art Conventionally, a buttonhole sewing machine has a cloth feeding mechanism for feeding a work cloth, a sewing mechanism for forming a keyhole seam on the work cloth, and a button at a substantially central portion of the keyhole seam using a cutter. A buttonhole forming mechanism for forming a hole, a control device for sewing a buttonhole stitch having a buttonhole by controlling the cloth feed mechanism, the sewing mechanism, and the buttonhole forming mechanism, respectively, are provided. By the way, the buttonhole seam is formed by the zigzag stitch formed on each of the left and right sides of the buttonhole, the front bar-tacking seam on the front side of the staggered seam, and the back bar-tacking seam on the back side of the zigzag seam. Become.

There are a plurality of types of front bar-tacking stitches including square, radial, and flow shapes, and a plurality of back bar-tacking stitches including square, radial, and eyelet-shaped stitches. Accordingly, a plurality of types of hole stitches (for example, 30 to 90) are obtained by combining the plurality of types of front bar tack stitches and the plurality of types of back bar tack stitches.
50 types) are in practical use.

[0004] That is, a commonly used hole such as a square hole overlocking seam having a square shape in front and back bar tacking, and a round hole overlocking seam having a round shape in front and back bar tacking. In addition to overlock stitches, radial square hole overlock stitches combining radial and square, eyelet square hole overlock stitches combining eyelet and square, square flow hole overlock stitches combining square and flow shape, etc. A plurality of types of overlock stitches of arbitrary shape having different bar-tacking shapes before and after are also used in various fields. Therefore, when sewing a buttonhole stitch, select one of a number of buttonhole stitch patterns from the list and input and set the buttonhole stitch number, or sequentially display the buttonhole stitch pattern on the display. It is designed to be selected while letting it go.

[0005] In addition, for each of the plurality of types of overlock stitches, a zigzag stitch sewing parameter including a plurality of items such as a staggered stitch length, a staggered stitch pitch, and a staggered stitch width can be set. For the back bar tack stitch, the back bar tack sewing parameter consisting of multiple items such as back bar tack length, back bar tack pitch, back bar tack correction width, and number of stitches can be set. Similarly, the front bar-tacking sewing parameter including a plurality of items such as the front bar-tacking length, the front bar-tacking pitch, the front bar-tacking correction width, and the number of stitches can be set.

Therefore, in a non-volatile memory such as a ROM provided in the control device, a sewing parameter memory for a staggered stitch, a sewing parameter memory for a back bar tacking, and a A sewing parameter memory is provided, a sewing data creation program for zigzag stitches, a sewing data creation program for multiple types of back bar tack stitches, and a sewing data creation program for multiple types of front bar tack stitches A program is provided. Therefore, when a desired buttonhole stitch is selected, sewing parameters relating to the selected keyhole stitch are read, sewing data of the buttonhole stitch is obtained by calculation, and a keyhole stitch is formed based on the sewing data. Is formed.

[0007]

In a conventional overlock sewing machine, for example, 30 to 50 types of combinations of any one of a plurality of types of front bar tack stitches and any of a plurality of types of back bar tack stitches are provided. When selecting an arbitrary one from a plurality of overlock stitches, the selection is made from the plurality of types of stitch pattern lists or the selection is made while sequentially displaying them on the display. In addition, there is a problem that a large amount of operation time is required for the selection operation and the work efficiency of the sewing operation is reduced.

Further, in the case of a plurality of types of overlocking stitches, even if the front bar-stitching seam is the same (for example, square), but the back bar-locking stitch is different (for example, a round shape and a flow shape), Even if the bar-tacking seam is the same (for example, square), but the front bar-tacking seam is different (for example, round and flow-shaped), the type (shape) of the hole-locking seam will be different. The memory for storing the staggered stitch sewing parameter, the back bar tack sewing parameter, and the front bar tack sewing parameter consisting of a plurality of items is provided for all of the plurality of types of overlock stitches. There is a problem that the memory for storing the application parameters becomes large and the cost increases.

An object of the present invention is to simplify the operation of selecting a desired overlock stitch to be used for sewing, and to reduce the size of a memory for storing a plurality of sewing parameters used for sewing the overlock stitch. And so on.

[0010]

According to a first aspect of the present invention, there is provided a buttonhole sewing machine including cloth feeding means for feeding a work cloth and sewing means for forming a keyhole seam on the work cloth. A plurality of types of front bar-tacking stitches can be formed on the hole-stitching sewing machine that can form a hole-stitching stitch consisting of the front bar-tacking seam on the front side of the staggered seam and the back bar-tacking seam on the back side of the staggered seam. A front bar-tacking selecting means for selecting an arbitrary one from the eyes, a back bar-tacking selecting means for selecting an arbitrary one from a plurality of types of back bar-stitching stitches, and a type selected by the above both selecting means. And a type determining means for determining the type of the buttonhole stitch by combining the front and rear bartacking stitches. Here, a plurality of types of front bar-tack stitches and a plurality of types of back bar-tack stitches are prepared in advance.

A desired front bar-tacking seam is selected from a plurality of types of front bar-tacking seams by a front bar-tacking selecting means, and a desired back bar-tacking seam is selected from a plurality of types of back bar-tacking seams by a back bar-tacking selecting means. Choose from eyes. The type determining means determines the type (or shape) of the buttonhole stitch obtained by combining the front bar-tacking stitch and the back bar-tacking stitch of the type selected by the two selecting means, respectively. That is, an arbitrary one is selected from the total number of combinations (for example, 56 types) of a plurality of types (for example, eight types) of front bar-tacking stitches and a plurality of types (for example, seven types) of back bar-tacking seams. Rather than multiple types (for example, 8
Type), the front bar-tacking seam is selected, and the back bar-tacking seam is selected from a plurality of types (for example, seven types). ,
The selection operation is greatly simplified.

Here, a sewing parameter for sewing the staggered stitch and a plurality of sewing parameters for sewing the selected front bar-tacking seam and back bar-tacking seam are input and set. When parameter setting means is provided (claim 1
Claim 2) is dependent on the sewing parameters for the zigzag stitch set by the parameter setting means, the selected sewing parameter for the front bar-tacking seam, and the selected sewing parameter for the back bar-tacking seam. On the basis of the above, it is possible to sew a buttonhole stitch in which the front bar-tacking seam and the back bar-tacking seam are combined.

In addition, only one type of staggered stitch sewing parameter needs to be stored, and only one type of the front bar-tacking stitch sewing parameter and one back bar-tacking stitch sewing parameter need to be stored for each type. Therefore, the memory capacity of the memory for storing these sewing parameters can be reduced, and the overlock sewing machine can be manufactured at low cost.

Sewing data for creating sewing data for sewing a buttonhole stitch based on the type of the keyhole stitch determined by the type determining means and the sewing parameters set by the parameter setting means; In the case where the creating means is provided (claim 3 dependent on claim 2), the sewing data creating means is only required to determine the type of the buttonhole stitch by the type determining means and to set the sewing parameter by the parameter setting means. Accordingly, it is possible to create sewing data for sewing a buttonhole stitch based on these types of buttonhole stitches and sewing parameters.

Further, the plurality of types of front bar-tacking seams and the plurality of types of back bar-tacking seams include round, square, and radial bar-tackings, respectively (claims dependent on claim 2 or 3). In item 4), the front bar-tacking seam and the back bar-tacking seam can be selected from round, square, and radial bar-tacking seams.

Further, the sewing parameters for the staggered stitch include at least the length and width of the stitch and the stitch pitch,
The sewing parameters for the bar-tack stitch include a bar-tack pitch, the number of bar-tack stitches, a bar-tack length, and a part of the bar-tack width correction (dependent on claim 2 or 3). )
It is only necessary to set at least the length and width of the stitch and the stitch pitch as the stitching stitch sewing parameters. It is only necessary to set the stop length and a part of the bar tack width correction.

In a case where there are provided display means including a display and stitch display control means for displaying the buttonhole stitches of the type determined by the type determination means on the display means. According to claim 6), a desired overlock stitch combining the selected front bar tack stitch and back bar tack stitch is displayed on the display. You can check.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is directed to a hole stitch sewing machine capable of forming a hole stitch including a staggered stitch, a front bar-tacking seam on the front side of the staggered stitch, and a back bar-tacking seam on the back side of the staggered seam. In this case, the present invention is applied. As shown in FIG. 1, the buttonhole sewing machine M is mounted and supported on a sewing machine table 1, the sewing machine motor 2, the foot pedal 3 for instructing the start and stop of the buttonhole sewing, and the keyhole seam 70. An operation panel 4 for inputting and setting various sewing parameters for sewing is provided, and a control device 5 for performing various controls including sewing control is provided in a box at the right end of the sewing machine table 1.

The buttonhole sewing machine M comprises a bed 6
It has a pillar 7 standing up from the bed 6 and an arm 8 facing forward from the pillar 7. As shown in FIGS. 2 to 5, the hole sewing machine M includes a cloth feeding mechanism 10 for feeding a work cloth back and forth, a sewing mechanism 30 for forming a hole stitch 70 on the work cloth, and a work cloth. A buttonhole forming mechanism 60 for forming a buttonhole with the cutter 61 in the overlock stitch 70 formed in the above is provided.

As shown in FIG. 3, the cloth feed mechanism 10 (which corresponds to cloth feed means) includes a feed base 11 and a cloth presser 1.
2, the stepping motor 13 and the like, and the stepping motor 13 is driven in a state where the work cloth is pressed by the cloth presser 12 and the feed base 11, so that the work cloth is
It is moved back and forth in synchronization with. The feed base 11 is formed in a long plate shape in the front and rear direction, and has a long hole 11a for forming a hole stitch 70 at a front end thereof. A pair of left and right guide plates 14 are fitted into the upper surface of the bed 6, and the feed base 11 is supported between the guide plates 14 so as to be movable back and forth.

A movable member 15 is provided on the lower surface of the rear end of the feed base 11.
Is fixed, and a movable member 17 is connected to the rear side of the movable member 15 via a long connecting rod 16 in the front-rear direction. The presser arm 1 having a cloth presser 12 attached to the front end of the movable member 17 is attached to the movable member 17.
8 has a rear end pivotally supported about the left-right axis. Cloth foot 1
2 is urged downward by an urging member (not shown) via the presser arm 18.
The height of the work clamp 12 can be adjusted. The connecting rod 16 is fixed to the left ends of the movable members 15 and 17 in a penetrating manner and extends therethrough. The connecting rod 16 is supported on the sewing machine frame via a pair of bearings 19 on both front and rear sides of the movable members 15 and 17 so as to be movable back and forth. Have been.

On the right side of the connecting rod 16, a longitudinally long rod 20 is fixedly provided on the sewing machine frame, and the right end of the movable member 17 is guided by this rod 20 via a bearing 17a so as to be movable forward and backward. Supported. A drive pulley 13a is fixed to the output shaft of the stepping motor 13, and a driven pulley (not shown) is pivotally supported by the sewing machine frame behind the drive pulley 13a.
Has been passed over. When the movable member 17 is fixed to a part of the belt 21 and the stepping motor 13 is driven, the movable members 15 and 17
1 and the presser foot 12 are integrally driven back and forth.

As shown in FIGS. 2 and 4, a sewing mechanism 30 (which corresponds to a sewing means) includes a needle bar 31 and a needle bar 3.
A sewing needle 32 attached to the lower end of the sewing machine 1 and having an upper thread extending from an upper thread supply source (not shown) such as a thread spool, a needle bar vertical movement mechanism 33 for reciprocatingly driving the needle bar 31 up and down, and swinging left and right. A needle bar swing mechanism 34 that is driven and driven, a bobbin (not shown) mounted on the lower side of the feed base 11 and around which a lower thread is wound, and an upper thread near the sewing needle 32 that moves up and down below the feed base 11 And a thread catcher (not shown) for catching the entanglement with the lower thread extending from the bobbin.

As shown in FIG. 4, in the needle bar vertical movement mechanism 33, the needle bar 31 is slidable up and down on a needle bar base 35 shown by a virtual line provided on the arm portion 8 so as to be swingable. The needle bar holder 36 is supported and fixed to the needle bar 31. Needle bar 3
1, a needle bar connecting rod 37 is provided on the rear side thereof, and its upper end 37a
Are connected to an upper shaft 38 which is rotated by the sewing machine motor 2 so as to make a circular motion (see circle C) in a vertical plane. 40 are rotatably connected to each other. A guide groove 36a having a rectangular cross section is formed in the rear part of the needle bar holder 36 in the left-right direction, and the front square piece 39 is movably engaged in the left-right direction with this guide groove 36a.

A needle bar connecting rod guide 41 is provided at the rear of the needle bar hanger 36.
The rear corner piece 40 is engaged with a vertical groove 41a formed in the needle bar connecting rod guide 41 and is guided so as to be movable only in the vertical direction. Further, a flat needle bar guide 42 is fixed to the side surface of the needle bar base 35, and protrudes from the left side of the needle bar holder 36 into an elongated hole 42 a formed in the needle bar guide 42 and extending along the needle bar 31. The projection 36b is engaged.
In the needle bar vertical movement mechanism 33 configured as described above, the force applied to the needle bar connecting rod 37 from the upper shaft 38 rotationally driven by the sewing machine motor 2 is applied to the needle bar 31 via the square piece 39 and the needle bar holder 36. , Whereby the needle bar 31 can be moved up and down.

In the needle bar swing driving mechanism 34, a swing lever 45 is provided on the rear side of the needle bar base 35, and a square piece 46 rotatably mounted on the front side of the lower end of the swing lever 45 has a needle. The lower end of the bar base 35 is engaged with the front part. An output shaft 47a of a stepping motor 47 is internally fitted and fixed to the upper end of the swing lever 45.
Is applied to the needle bar 3 via the square top 46 and the needle bar base 35.
1 so that the needle bar 31 can be swung right and left.

As shown in FIG. 5, the buttonhole forming mechanism 60 includes a cutter 61, a cutter holder 62, a cutter mounting shaft 63, a cutter operating arm 64, a cutter driving solenoid 65, and the like. A cutter holder 62 is provided at the lower end of the cutter mounting shaft 63, and the cutter 61 is fixed to the cutter holder 62 with screws 62a. The cutter operating arm 64 is formed in a substantially L-shape with its rear end bent upward, and its central portion in the front-rear direction is supported by the sewing machine frame via a pivot shaft 64a so as to be swingable about the left and right axes.

The front end of the cutter operation arm 64 is urged upward by a spring member 66, the front end of the cutter operation arm 64 is connected to the upper part of the cutter mounting shaft 63, and the rear upper end of the cutter operation arm 64 is Driving solenoid 65
Is connected via a link 67 to a plunger 65a projecting rearward from the plunger. By projecting / retracting the plunger 65a of the cutter driving solenoid 65, the cutter 61 can be moved up and down via the cutter operating arm 64 and the cutter mounting shaft 63. Since the cutter driving solenoid 65 is a bidirectional solenoid capable of driving the plunger 65a in both the projecting direction and the retreating direction, the spring member 66 compensates for the weight of the mechanism from the cutter mounting shaft 63 to the cutter 61. And it may be omitted.

Here, the buttonhole stitch 70 will be described. As shown in FIG. 13, the buttonhole stitches 70 include left and right zigzag stitches 71 a and 71 b formed on both left and right sides of a button hole 74 formed by the cutter 61, and a position before these zigzag stitches 71. Front bar-tacking seam (radial type) 72 on the side
The front bar tacking seam (square) 73 at the back side of the staggered seam 71 is formed. As shown in FIG. 11, the front bar-tacking seam 72 includes a square shape, a radial shape, a round shape, a flow shape, and a straight shape.
One of two types (or shapes),
As shown in FIG. 12, the inner bar-tacking seam 73 is square,
Four types (or shapes): radial, round, and eyelet
Can be selected.

That is, by combining five types of front bar-tacking stitches 72 and four types of back bar-tacking seams 73, as many as 20 types of buttonhole stitches 70 can be selectively sewn. still,
FIG. 13 shows a hole stitch 70 in which a radial front bar-tacking seam 72 and a square back bar-tacking seam 73 are combined with a staggered seam 71.
Is shown.

Next, a control system of the hole sewing machine M will be described. As shown in FIG. 6, the control device 5 is a CPU.
A microcomputer having a main portion 5a, a ROM 5b and a RAM 5c, an input interface 5d to which a signal from a start switch 3a and a signal from an operation panel 4 are input in accordance with an operation state of the foot pedal 3, a sewing machine motor 2, A drive signal is output to the stepping motors 13 and 47, the cutter driving solenoid 65, and the like via a drive circuit (not shown), and an output interface 5e for outputting a display control signal to the operation panel 4 is provided. Are connected to each other by a common bus 5f.

In the ROM 5b, a hole stitch 7 based on various sewing parameters set by the operation panel 4 is stored.
A sewing data creation control program for creating sewing data of 0, and a later-described stitching sewing control for stitching a stitching hole 70 by controlling the cloth feed mechanism 10, the sewing mechanism 30, and the button hole forming mechanism 60, respectively. Are stored. Here, the sewing data creation control program includes a subroutine for creating sewing data of the zigzag stitch 71 from the zigzag stitch sewing parameter, and sewing of a plurality of types of front bar-tacking stitches 72 from the sewing parameters for the front bar-tack sewing. A subroutine for creating data and a subroutine for creating sewing data of a plurality of types of back bar tack stitches 73 from the back bar tack stitch sewing parameters are included.

Further, as shown in FIG. 7, the ROM 5b stores
A sewing parameter setting range reference table T is stored. That is, the setting program numbers “00 to 29” for setting a plurality of sewing parameters, the setting range data of the sewing parameters, the setting value increasing / decreasing steps, and the initial values (default values) of the setting values are associated with each other. Is provided. In the sewing parameter setting range reference table T, program numbers "01 to 03" for setting sewing parameters for the staggered stitch 71, program numbers "20 to 24" for setting sewing parameters for the front bar-tacking seam 72, The program numbers “25 to 29” for setting sewing parameters related to the back bar tack seam 73 are included.

The RAM 5c stores a stitching stitch sewing parameter memory 5cA (see FIG. 8) for storing three sewing parameters (staggered stitch length, staggered stitch pitch, and staggered stitch width) for sewing the staggered stitch 71. ) And the type of front bar tack (square,
Four sewing parameters (front bar tacking length, front bar tacking pitch, front bar tacking width compensation,
The front bar-tacking sewing parameter memory 5cB (see Fig. 9) that stores the number of front bar-tacking needles, and four sewing parameters (back bar-tacking type) for each type of back bar-tacking (square, radial, round, and eyelet-shaped). Back bar-tacking sewing parameter memory 5cC that stores stop length, back bar-tacking pitch, back-bar-tacking width correction, and number of back-tacking bars
(See FIG. 10), and various memories and buffers for temporarily storing the calculation results calculated by the CPU 5a are provided.

Next, the operation panel 4 will be described.
As shown in FIG. 14, four display lamps 90 and a selection key (SEL) indicating the current control mode of the
ECT) 91, a reset key (RESET) 92 for resetting the buttonhole sewing machine M after dealing with an abnormality, and a cutter-on key for driving the cutter 61 without depending on a program.
(CUTTER ON) 93, a number display section 94 consisting of a 2-digit 7-segment display, and a program number key (PROGRAM N
O) 95 and the like.

The operation panel 4 further includes a power-on lamp 96 for indicating that the power is on, a warning lamp 97 for indicating that an abnormality has occurred, and a set value display section 98 comprising a 4-digit 7-segment display. , An up / down key 99, an enter key (ENTER) 100, and a display key (DISP) 102 for displaying a hole stitch 70 on the liquid crystal display 101.

An automatic mode (AUTO) for performing normal sewing, a test feed mode (TESTFEED) for confirming a needle drop position without performing actual sewing, and a pulley (not shown) are operated by the selection key 91. The mode can be switched between a manual mode (MANUAL), in which sewing is performed manually by turning, and a program mode (PROGRAM), in which various settings are made. The lamp 90 corresponding to the switched mode is lit. .

When the program mode is set, the current program number is displayed on the number display section 94, and the set value of the sewing parameter is displayed on the set value display section 98. The number displayed on the number display section 94 can be incremented each time the program number key 95 is operated. The set value of the parameter set by the current program number is displayed on the number display section 94 and can be increased or decreased by operating the up / down key 99, and finally changed and set by operating the enter key 100. Can be.

Next, the routine of the buttonhole stitch sewing control executed by the control device 5 will be described with reference to the flowchart of FIG. However, the symbol Si in the figure
(I = 1, 2, 3,...) Are each step. When the power is turned on to the hole sewing machine M, this control is started. First, an initial number “00” is set in a program number counter, and the program number “00” is displayed in the number display section 94.
(S1), and the number of revolutions of the spindle set to the program number "00" is displayed on the set value display section 98 (S2).

Next, when the program number changing process is executed by operating the program number key 95 without depressing the foot pedal 3 (S3: No) (S3: No).
4: Yes), the program number “01” for the staggered stitch 71
0303 ”(S8: Yes), the zigzag stitch sewing parameter setting process is executed (S12). That is,
In the sewing parameter setting process, for example, as shown in FIG.
At this time, the program number is displayed on the number display section 94, and the set value (initial value) “10” relating to the staggered stitch length of the program number “01” is displayed on the set value display section 98. Therefore, the set desired set value “22.0” is displayed on the set value display section 98.

Similarly, when "0.5" is set as the set value of the zigzag stitch pitch of the program number "02" and "1.2" is set as the set value of the zigzag stitch width of the program number "03", As shown in FIG. 8, these set values are stored in the zigzag stitch sewing parameter memory 5cA. Next, when any of the program numbers "20 to 24" relating to the front bar-tacking seam 72 is executed by the program number changing process (S9: Yes), the sewing parameter setting process for the front bar-tacking seam is executed (S13). . That is, in the sewing parameter setting process, first, the type of the front bar-tacking seam 72 is selected by the program number “20”.

The set value of the front bar tack length is set by the following program number “21”, the set value of the front bar tack pitch is set by the program number “22”, and the front bar tack width is corrected by the program number “23”. Is set, and finally the set value of the number of front bar-tacking stitches is set by the program number “24”. As a result, as shown in FIG. 9, the sewing parameters of the selected front bar-tacking stitch 72 are stored in the front bar-tacking sewing parameter memory 5cB. Next, when any of the program numbers “25 to 29” relating to the back bar tack stitch 73 is executed by the program number change processing (S10: Yes)
), The sewing parameter setting processing for the back bar tack stitch is executed (S14).

That is, in the sewing parameter setting processing, first, the back bar tack stitch 7 is set by the program number "25".
Three types are selected. The set value of back bar tack length is set by the following program number “26”, the set value of back bar tack pitch is set by the program number “27”, and the set value of back bar tack width correction is set by the program number “28”. Is set, and finally the set value of the number of back bar stitches is set by the program number “29”. As a result, as shown in FIG. 10, the sewing parameters of the selected back bar tack stitch 73 are stored in the back bar tack sewing parameter memory 5cC.

However, the staggered seam 71 and the front bar-tacking seam 72
In the case of a program number other than or the bar-tacking seam 73 (S10: No, S11: No), the specified sewing parameter setting process is executed (S15). When the display key 102 is operated after setting the sewing parameters of these plural items (S5: Yes), the front bar tack stitch 72 of the type selected by the program number "20" and the program number "2"
The type of the overlock stitch 70 in which the back bar stitch 73 of the type selected in 5 "is combined with the staggered stitch 71 is determined (S6), and the determined overlock stitch 70 is displayed on the liquid crystal. It is displayed on the display 101 (S7).

For example, when the radial shape is selected as the front bar-tacking seam 72 and the square shape is selected as the back bar-tacking seam 73, as shown in FIG. On the liquid crystal display 101, a buttonhole stitch 70 of a type obtained by combining the inner bar-tacking with the staggered stitch 71 is displayed. As a result, the buttonhole stitch 70 for sewing is provided.
Can be visually confirmed. When the over key stitch 70 of this type is sufficient and the enter key 100 is operated (S11: Yes), the front bar tack stitch 72 and the back bar tack stitch 73 of the selected type are selected in the same manner as in S6. Are combined with the zigzag stitch 71 to determine the type of the overlock stitch 70 (S16).

Next, the sewing data creation control program is started up, and based on the determined type of the overlock stitch 70 and the set sewing parameters, the left and right staggered stitch data, the front bar tacking stitch data and The sewing data of the overhole stitch 70 including the back bar tacking stitch data is created (S17).
At this time, when the start switch 3a is operated by the depressing operation of the foot pedal 3 to start sewing (S
3: Yes), the sewing control is started based on the created sewing data, and the sewing process for forming the buttonhole stitch 70 on the work cloth by controlling the drive of the cloth feed mechanism 10 and the sewing mechanism 30 is executed. (S18). As a result, as shown in FIG. 13, a hole stitch 70 of the type in which the selected type of front bar-tacking seam (radial type) 72 and the back bar-tacking seam (square) 73 are combined with the staggered seam 71 Is sewn.

Here, the program number key 95 of the operation panel 4 and the buttonhole stitch sewing control in particular, such as S3 and S9, correspond to the front bar-tacking selection means, and the program number key 95 and the buttonhole stitch sewing control in particular. S3, S10, etc. correspond to back bar-tacking selection means.
S16 and the like correspond to the type determining means, the buttonhole stitch sewing control in particular S12 to S14 correspond to the parameter setting means, and the buttonhole stitch sewing control particularly S17 corresponds to the sewing data creation means. 101 and a display control program or the like correspond to the display means.
7 corresponds to the stitch display control means.

As described above, any one of the five types of front bar-tacking seams 72 can be selected, and any one of the four types of back bar-tacking seams 73 can be selected. Rather than selecting an arbitrary one from the total number of combinations (20 types) of the seam 72 and the plurality of types of back bar tack stitches 73, one is selected from a few front bar tack stitches and a few back bar tacks are selected. When one is selected from the stitches, the number of selections is two, but the number of options can be reduced, and the selection operation can be greatly simplified.

Sewing parameters for sewing the staggered stitch 71 and a plurality of sewing parameters for sewing the selected front bar-tacking seam 72 and back bar-tacking seam 73 can be input and set. The front bar-tacking seam 72 and the back bar-tacking seam 73 are staggered based on the set zigzag stitch sewing parameter, front bar-tacking seam sewing parameter and back bar-tacking seam sewing parameter. The buttonhole stitch 70 combined with the eye 71 can be sewn.

In addition, only one kind of staggered stitch sewing parameter may be stored in the staggered stitch sewing parameter memory 5cA, and the front bar-tacking seam sewing parameter and the back bar-tacking seam sewing parameter are different for each type. Since only one type of each of the sewing parameters need only be stored in the barbed stitch sewing parameter memories 5cB and 5cC, the memories of the memories 5cA to 5cC for storing these sewing parameters can be reduced in size, and the overlock sewing machine M can be manufactured at low cost. be able to.

The sewing parameters for the zigzag stitch include at least the length and width of the stitch and the stitch pitch. The sewing parameters for the bar-tack stitch include the bar-tack pitch, the number of bar-tack stitches, and the bar-tack length. And a part of the bar-tacking width correction, it is only necessary to set at least the stitch length and width and the seam pitch as the sewing parameters for the zigzag stitch. It is only necessary to set a part of the bar tacking pitch, the number of bar tacking needles, the bar tack length, and the bar tack width correction.

When the display key 102 is operated, the type of the overlock stitch 70 in which the selected type of the front bar-tacking seam 72 and the back bar-tacking seam 73 are combined with the staggered seam 71 is determined. Since it is displayed on the display 101, the determined overlock stitch 70 can be visually confirmed.

A modification of the above embodiment will be described. 1) The types of the front bar-tacking seam 72 and the types of the back bar-tacking seam 73 are merely examples, and various bar-tacking seams can be added to be selectable. . 2) For frequently used hole-locking stitches 70 having square, radial, round or other bar-locking in common with the front bar-locking seam 72 and the rear bar-locking seam 73, square hole overlocking stitches, It may be possible to directly select a radial overhole stitch or a round overhole stitch.

3) Staggered stitch 7 on liquid crystal display 101
1 is always displayed, and when the front bar-tacking seam 72 or the back bar-tacking seam 73 is selected, the bar-tacking seam 7
1 may be displayed in combination. 4) Various modifications may be made to the above-described embodiment and modifications without departing from the spirit of the present invention. Of course, the present invention can be applied to various types of hole stitch sewing machines having a cloth feeding mechanism, a sewing mechanism, and the like.

[0055]

According to the buttonhole sewing machine according to the first aspect, the sewing machine includes the cloth feeding means and the sewing means, and includes the front bar-tacking selecting means, the back bar-tacking selecting means, and the type determining means. Rather than selecting any one of the total number of combinations of multiple types of front bar-tacking stitches and multiple types of back bar-tacking stitches, select a front bar-tacking seam from multiple types and select multiple types. When the back bar stitch is selected from among them, the number of selections is two, but the number of options can be reduced, and the selection operation can be greatly simplified.

According to the buttonhole sewing machine of the second aspect,
There is provided a parameter setting means for inputting and setting a sewing parameter for sewing the staggered seam and a plurality of sewing parameters for sewing the selected front bar-tacking seam and back bar-tacking seam, respectively. Therefore, based on the sewing parameters for the zigzag stitch, the sewing parameters for the front bar-tacking seam, and the sewing parameters for the back bar-tacking seam set by the parameter setting means, these front bar-tacking seam and back bar-tacking seam are used. A buttonhole stitch can be sewn in combination with a staggered stitch.

In addition, only one type of staggered stitch sewing parameter needs to be stored, and only one type of the front bar-tacking stitch sewing parameter and one back bar-tacking stitch sewing parameter need to be stored for each type. Therefore, the memory capacity of the memory for storing these sewing parameters can be reduced, and the overlock sewing machine can be manufactured at low cost. The other effects are the same as those of the first aspect.

According to the third aspect of the present invention,
The type of the buttonhole stitch determined by the type determination means,
Based on the sewing parameters set by the parameter setting means, a sewing data creating means for creating sewing data for sewing the hole sewing is provided. By simply setting the sewing parameters by the parameter setting means, the sewing data creating means can create the sewing data based on the type and the sewing parameters of the buttonhole stitches. Can be sewn. Other effects are the same as those of the second aspect.

According to the hole sewing machine of the fourth aspect,
The plurality of types of front bar-tacking seams and the plurality of types of back bar-tacking seams include round, square, and radial bar-tackings, respectively. It can be selected from the shape, square and radial bartacking. Other claim 2
Or, the same effect as 3 can be obtained.

According to the hole sewing machine of the fifth aspect,
The sewing parameters for the staggered stitch include at least the length and width of the stitch and the stitch pitch, and the sewing parameters for the bar-tack stitch include a bar-tack pitch, the number of bar-tack stitches, and a bar-tack length. , The sewing parameters for bar-tacking stitches are included, so it is only necessary to set at least the stitch length, width and stitch pitch as the stitching stitching sewing parameters. It is only necessary to set a part of the bar tacking pitch, the number of bar tacking needles, the bar tack length, and the bar tack width correction. Other effects similar to those of the second or third aspect are exhibited.

According to the buttonhole sewing machine of the sixth aspect,
Since the display means including the display and the seam display control means for displaying the type of overlock stitch determined by the type determination means on the display means are provided, the selected front bar-tacking seam and back bar-tacking seam are selected. Since the desired overlock stitch is displayed on the display in combination with the above, the determined overlock stitch can be visually confirmed. In addition, the same effect as any one of the first to fifth aspects is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a buttonhole sewing machine according to an embodiment of the present invention.

FIG. 2 is a partially enlarged right side view of the head of the buttonhole sewing machine.

FIG. 3 is a schematic perspective view of a cloth feeding mechanism.

FIG. 4 is a schematic perspective view of a sewing mechanism.

FIG. 5 is a schematic perspective view of a buttonhole forming mechanism.

FIG. 6 is a block diagram of a control system of the buttonhole sewing machine.

FIG. 7 is a table showing data of a sewing parameter setting range reference table.

FIG. 8 is a table showing data of a staggered stitch sewing parameter memory.

FIG. 9 is a table showing data of a front bar tack sewing parameter memory;

FIG. 10 is a table showing data of a back bar tack sewing parameter memory.

FIG. 11 is an explanatory diagram illustrating types of front bar-tacking stitches.

FIG. 12 is an explanatory diagram illustrating types of back bar tack stitches.

FIG. 13 is a plan view of a buttonhole stitch.

FIG. 14 is a plan view of an operation panel.

FIG. 15 is a flowchart of a routine of a buttonhole stitch sewing control.

FIG. 16 is a diagram corresponding to FIG. 14, showing a determined overlock stitch;

[Explanation of symbols]

 M Overhole sewing machine 4 Operation panel 5 Controller 10 Cloth feed mechanism 30 Sewing mechanism 70 Overhole seam 71 Staggered seam 72 Front bar-tacking seam 73 Back bar-tacking seam 101 Liquid crystal display

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Nishida 15-1, Naeshiro-cho, Mizuho-ku, Nagoya-shi Inside Brother Industries, Ltd. (72) Inventor Toru Shibata 15-1 Naeshiro-cho, Mizuho-ku, Nagoya-city Brother Industries, Ltd. (72) Inventor Takashi Kondo 15-1, Naeshiro-cho, Mizuho-ku, Nagoya-shi Inside Brother Industries, Ltd. (72) Inventor Jun Kanno 15-1 Naeshiro-cho, Mizuho-ku, Nagoya-shi F-term in Brother Industries, Ltd. (reference) 3B150 AA24 BA06 CE03 CE09 CE25 EE03 EE08 GF02 GF03 GG04 JA07 JA11 LA07 LA10 LA16 LA64 LA71 LB02 NA02 NA07 NA09 NA15 NA63 NA64 NB02 NB03 NB09 NB12 NB18 NC06 NC11 PA01 QA01 QA06 QA07 QA08

Claims (6)

[Claims] 1. A staggered stitch and a front bar-tacking stitch on the front side of the staggered stitch having a cloth feeding means for feeding the work cloth and a sewing means for forming a hole stitch on the work cloth. A front bar-tacking selecting means for selecting an arbitrary one of a plurality of types of front bar-tacking stitches in a keyhole stitching machine capable of forming a keyhole stitch including a back bar-stitching seam at the back side of a staggered stitch. Back bartacking selection means for selecting any one of a plurality of types of back bartacking stitches; front bartacking seams and back bartacking seams of the types respectively selected by the two selection means, A type determination means for determining a type of a keyhole stitch in combination with a zigzag stitch, and a keyhole stitch sewing machine comprising: 2. A parameter for inputting and setting a sewing parameter for sewing the staggered stitch, and a plurality of sewing parameters for sewing the selected front bar-tacking seam and back bar-tacking seam, respectively. 2. The sewing machine according to claim 1, further comprising setting means. 3. Sewing data for creating sewing data for sewing a buttonhole stitch based on the type of the keyhole stitch determined by the type determination means and the sewing parameters set by the parameter setting means. 3. The overhole sewing machine according to claim 2, further comprising a creating means. 4. A bar tack according to claim 2, wherein the plurality of types of front bar tack stitches and the plurality of types of back bar tack stitches include round, square, and radial bar tacks, respectively. The overhole sewing machine described. 5. The sewing parameters for the staggered stitch include at least the length and width of the stitch and the stitch pitch, and the sewing parameters for the bar-tack stitch include the bar-tack pitch, the number of bar-tack stitches, and the like. 4. The hole sewing machine according to claim 2, wherein the sewing machine includes a part of a bar-tacking length and a bar-tacking width correction. 6. A display device comprising: a display means including a display; and a stitch display control means for displaying a buttonhole stitch of the type determined by the type determination means on the display means. 5. The overhole sewing machine according to any one of 5.