JP2003088695A - Control device of sewing machine and cloth cutter of sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of a sewing machine capable of forming buttonholes of a variety of lengths without replacing a cloth cutting knife and a knife receptacle. SOLUTION: The control device (50) of a sewing machine controls the driving of the cloth cutting knife on the basis of control data including data (ml-lc) concerning the length of a buttonhole and data (ml) concerning the length of the side stitch of the buttonhole, when cutting an object to be sewn by moving up and down a cloth cutting knife (61) having an eyelet buttonhole knife portion (61a) forming an eyelet portion (90) of an eyelet buttonhole (92) and a straight line knife portion (61b) forming a straight line portion (91). Therefore, by moving the straight line knife portion to the rear of the straight line portion, and sequentially cutting the sewn object, buttonholes different in the length of the straight line portion can be formed to the side stitch of the buttonhole without changing to a knife of the same shape as a buttonhole and a knife receptacle corresponding to the knife.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine control device and a sewing machine cloth cutting device for forming buttonholes in a material to be sewn.

[0002]

2. Description of the Related Art Generally, a buttonhole overedging machine is known as a sewing machine for performing overedging around a buttonhole formed in a cloth (sewn material). In this buttonhole sewing machine, a knife and a knife receiver are provided in the vicinity of the sewing machine needle so as to face each other vertically. As the buttonhole, an eyelet hole (also called an eyelet button hole) formed by connecting a drop-shaped hole (eyelet portion) and a linear hole (straight portion), and a linear hole (straight portion) There is a sleep eye hole formed from only chisel.

The knife for forming eyelet holes is, for example,
The drop-shaped blade forming the eyelet section and the linear blade forming the linear section are connected to each other. I have it. Then, with the cloth placed on the knife receiver, the knife is driven downward and pressed against the cloth and knife receiver to form a button hole. In such a buttonhole sewing machine, a plurality of pattern data is stored for the size and shape of the buttonhole sewing which can be formed, and a predetermined buttonhole sewing is performed by calling one of them on the operation panel. .

FIG. 35 shows a conventional pattern data table when buttonhole sewing is performed.
It is possible to store nine types of pattern data having the data items of. Data item 1 is for setting the shape of the knife forming the eyelet portion of the eyelet hole. Fig. 36
As shown in (a), the size of the eyelet portion E is defined by the horizontal width ew and the vertical length el, and the combination of these ew and el is stored in advance as a table as shown in FIG. 36 (b). In the data item 1, when forming eyelet holes, one is selected from the numbers 1 to 5, and when forming a sleep eye hole, the number 0 is selected.

The data items 2 to 6 are data relating to the number of needles and the length of each part constituting the eyelet eyelet as shown in FIG. 36 (c). That is, as shown in the table of FIG. 36 (d), the data item 2 is the holing length (ml),
Data item 3 is the number of straight line stitches (ln), data item 4 is the number of eyelet stitches (en), data item 5 is the straight line female space (ls), data item 6 is the eyelet female space (es).
Is. The data item 7 is for selecting a leading knife that performs cloth cutting before overedging and a post knife that performs cloth cutting after overedging.

[0006]

By the way, since buttonholes are required to have different shapes depending on the type and design of clothes, when forming buttonholes of different shapes, basically a scalpel and a knife holder are used. Need to be replaced. Therefore, even if you simply change the length of the straight part of the buttonhole,
It was necessary to use a scalpel and a knife receiver corresponding to this, and it took time and labor to replace these knife and knife receiver.
Also, like a flower hole that is formed on the collar of a suit,
Sometimes a buttonhole sewing machine is used to form a hole other than a buttonhole, but in this flower hole, there is a case where only a hole for the eyelet part without a straight part is formed, and a case where it is formed with a sleep eye. In any case, in order to change the length and type of the buttonhole, the knife and the knife receiver had to be exchanged as described above.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and a sewing machine control device and a sewing machine cloth capable of forming buttonholes of various lengths and types without replacing the cloth cutting knife and the knife receiver. It is to provide a cutting device.

[0008]

In order to solve the above problems, for example, as shown in FIGS. 1 to 16, a sewing machine control device (50) according to claim 1 forms a button hole in a material to be sewn. In addition, the sewing machine (10) for forming a buttonhole stitch around the buttonhole of the sewing target is provided with a eyelet section (9).
Eyelet buttonhole (92) consisting of 0) and straight part (91)
A cloth cutting knife (61) having an eyelet knife part (61a) forming the eyelet part and a linear knife part (61b) forming the straight part, and the cloth cutting knife is disposed so as to face the cloth cutting knife. A cloth cutting means (60) having a knife receiver (62) is provided, and when the cloth cutting knife is moved up and down relative to the knife receiver to cut a workpiece, the eyelet knife portion and the eyelet knife portion are provided. Control of a sewing machine that controls the eyelet button hole to be formed in the workpiece by using both the linear knife portion and the straight hole (93) in the workpiece by only the linear knife portion. The apparatus is provided with a storage means (RAM 52, EEPROM 53) for storing a plurality of control data for forming the buttonhole and the buttonhole stitch, and the control data includes data (ml) relating to the length of the buttonhole.
-Lc) and data on the length of the overlock seam (m
1) is included, and the drive of the cloth cutting means is controlled based on the control data.

According to the control device of the sewing machine of the first aspect, both the eyelet knife portion and the straight knife portion are used based on the control data including the data regarding the length of the buttonhole and the data regarding the length of the overlock stitch. Control so that eyelet buttonholes can be formed in the workpiece. Therefore, if you move the straight knife part to the rear part of the straight part and sequentially cut the sewn item, you can change the length of the straight part of the eyelet button hole without replacing the knife and knife holder. can do. Further, based on the control data including the data on the length of the button hole and the data on the length of the overlock stitch, the linear hole can be formed in the workpiece by only the linear knife portion. Therefore, if the straight knife part is moved to the rear part of the straight hole and the sewn product is sequentially cut, the length of the straight hole can be changed without replacing the knife or knife holder. can do.

Further, a cloth cutting knife having an eyelet knife portion forming the eyelet portion of the eyelet button hole consisting of an eyelet portion and a straight portion and a straight knife portion forming the straight portion is used, and the button hole The data regarding the length and the data regarding the length of the overlock stitch can be set as different values. Therefore, for example, after forming a hole stitch, in order to prevent fraying and reinforcement of the sewing start point and the sewing end point, bar-tacking may be formed to connect these points, but at this time, For example, if the straight part of the eyelet button hole extends to a position sandwiched between these two points, the presence of this straight part may cause the needle to fall into the part without the work (incision), Although there may be a case where a bartacking sewing failure occurs, by setting the data related to the length of the button hole, it is possible to prevent the straight line part from extending to the position between the sewing start point and the sewing end point. Sewing defects can be prevented.

A sewing machine controller according to a second aspect of the present invention is the sewing machine controller according to the first aspect, wherein both the eyelet knife portion and the straight knife portion are used for the control data for sewing. Data (l for changing the length of the straight line portion of the eyelet button hole when the eyelet button hole is formed in the object.
c) is included.

According to the sewing machine control device of the second aspect, the same effect as that of the first aspect can be obtained, and after the eyelet button hole is formed by the eyelet knife portion and the straight knife portion, the straight knife portion is straightened. The rear part of the eyelet button hole, based on the data for changing the length of the linear portion of the eyelet button hole, if the workpiece is sequentially cut, the linear portion of the eyelet button hole, The length of the straight portion can be extended based on the data for changing the length, and the buttonholes corresponding to various specifications can be formed without replacing the knife or the knife receiver.

A sewing machine control apparatus according to a third aspect of the present invention is the sewing machine control apparatus according to the first or second aspect, wherein the control data includes a linear hole in the workpiece by only the linear knife portion. Data (c) for changing the formation position of the linear hole along the length direction of the overhole seam when forming
c) and data (lc) for changing the length of the linear hole are included.

According to the sewing machine control device of the third aspect, the same effect as that of the first or second aspect can be obtained, and
Since data can be set to change the formation position of the straight hole along the length direction of the overhole stitch, the straight hole can be formed at any position with respect to the overhole stitch, and the straight hole can also be formed. Since the data for changing the length can be set, the length of the linear hole can be changed arbitrarily, and it is possible to form button holes corresponding to various specifications without replacing the knife or knife receiver. Become.

A sewing machine control device according to a fourth aspect of the present invention is the sewing machine control device according to any one of the first to third aspects, wherein the control data is data relating to the length of the eyelet knife portion. ma), data (mb) regarding the length of the linear knife portion, and data (mc) regarding the length between the eyelet knife portion and the straight knife portion.

According to the sewing machine control device of the fourth aspect, the same effect as that of any one of the first to third aspects can be obtained, the shape of the cloth cutting knife can be easily specified, and the cloth cutting device can be easily specified. When forming eyelet buttonholes using a knife, it is not cut by the eyelet knife portion and the straight knife portion,
The control device can easily calculate the length of the material to be sewn in the uncut portion and the length to be added by using only the linear knife portion, and the workability of the buttonhole forming work can be improved.

A sewing machine controller according to a fifth aspect of the present invention is the sewing machine controller according to any one of the first to fourth aspects, wherein the control data includes the eyelet knife portion and the linear knife portion. Includes selection data (ss) for selecting whether to form eyelet button holes in the sewn product by using both of It is characterized by

According to the sewing machine control device of the fifth aspect, the same effect as that of any one of the first to fourth aspects can be obtained, and at the same time, both the eyelet knife portion and the straight knife portion are used for sewing. The eyelet button hole or the straight hole can be easily selected because the selection data can be set to select whether to form the eyelet button hole on the It is possible to form a straight hole, and it is not necessary to replace it with a predetermined cloth cutting knife corresponding to the shape of the straight hole when forming the straight hole.

A sewing machine control apparatus according to a sixth aspect of the present invention is the sewing machine control apparatus according to any one of the first to fifth aspects, wherein the control data is used when a button hole is formed in a sewing object. It is characterized in that it includes data on the rising height of either the cloth cutting knife or the knife receiver that moves up and down (the height of the knife that can be fed in advance).

According to the sewing machine control device of the sixth aspect, the same effect as that of any one of the first to fifth aspects is obtained, and the sewing machine control device moves up and down when the buttonhole is formed in the sewing object. Since the data regarding the rising height of either the cloth cutting knife or the knife receiver can be set, if this data is set to the height almost the same as the thickness of the sewing object, the cloth cutting knife or The amount of rise of the knife receiver is minimized, and the cycle time for forming buttonholes can be shortened.

A sewing machine controller according to a seventh aspect of the present invention is the sewing machine controller according to any one of the first to sixth aspects, further comprising a changing means (operation panel 59) for changing the content of the control data. It is characterized by being provided.

According to the sewing machine control device of the seventh aspect, the same effect as that of any one of the first to sixth aspects can be obtained, and the control device is provided with the changing means for changing the content of the control data. By changing the contents, it is possible to form button holes corresponding to various specifications.

In order to solve the above-mentioned problems, the invention according to claim 8 forms a button hole in a material to be sewn and forms a buttonhole stitch around the button hole as shown in, for example, FIGS. It is provided on the sewing machine (200) to be formed,
An eyelet knife portion (eyelet knife 101b) forming the eyelet portion of an eyelet button hole (92) including an eyelet portion (90) and a straight portion (91), and a straight knife portion (straight knife 102b) forming the straight portion. ), A eyelet knife receiving portion (160b) which is arranged vertically opposed to the cloth cutting knife and which matches the eyelet knife portion, and a linear knife receiver portion which matches the linear knife portion. (160c) knife receiver (planar knife receiver 160 or step knife receiver 167)
And a cloth cutting drive means (a knife receiving drive means 170) for driving one of the cloth cutting knife and the knife receiver in the vertical direction so that the cloth cutting knife and the knife receiver come into contact with and separate from each other. A cloth cutting device (201) for a sewing machine, which cuts a material to be sewn to form a button hole when a cloth cutting knife and a knife receiver are in contact with each other, and the eyelet knife portion and the linear knife portion of the cloth cutting knife are provided. At least one of which is configured to be movable so as to have a first position in which the sewing target can be cut in conformity with the knife receiver and a second position in which the knife receiver is not in agreement, and the eyelet knife portion and the eyelet knife portion. For the linear knife portion that takes the first position and the second position, a moving means (air cylinder 11 that moves between the first position and the second position).
0, a spring 108).

According to the invention described in claim 8, at least one of the eyelet knife portion and the straight knife portion of the cloth cutting knife is moved by the moving means so as to cut the workpiece by matching with the knife receiver. It is possible to move between a possible first position and a second position which does not match the knife receiver. This allows
Various button holes can be formed. For example, when the knife receiver is a type in which the eyelet knife receiving portion and the linear knife receiving portion are formed flat, and only the eyelet knife female portion is moved by the moving means, when the eyelet knife female portion is at the first position,
It is possible to form eyelet buttonholes and to form linear buttonholes (sleeping eyelets) when in the second position. Also,
When only the linear knife portion moves, the eyelet button hole can be formed when the linear knife portion is at the first position, and only the eyelet portion can be formed when the linear knife portion is at the second position, which can be used for a flower hole or the like. Both, if movable, eyelet button holes,
It is possible to form only three types, a sleep eye hole and an eyelet part.
Therefore, various button holes can be formed without replacing the cloth cutting knife.

Further, according to a seventeenth aspect of the present invention, the cloth cutting means can be moved relative to the object to be sewn in a direction parallel to the straight line portion of the eyelet button hole formed in the object to be sewn. If the relative moving means (for example, the feed table 14) is provided, the cloth cutting means can be moved relative to the workpiece without changing the cloth cutting knife in addition to the effect of the eighth aspect. While doing so, it is possible to make additional cuts and form buttonholes of various lengths.

The invention described in claim 9 is the cloth cutting device for a sewing machine according to claim 8, wherein, for example, FIGS.
As shown in FIG. 6, as a knife receiver, a flat knife receiver (160) in which the eyelet knife receiving portion and the straight knife receiving portion are formed on substantially the same horizontal plane, and the eyelet knife receiving portion and the straight knife receiving portion are formed on different horizontal surfaces. It is configured such that both the step knife receiver (167) provided with a step so as to be formed can be attached, and either one is attached and used.

According to the ninth aspect of the present invention, both the flat knife receiver and the step knife receiver can be attached as the knife receiver. This increases the variations that can be selected. For example, even when only the eyelet knife portion can be moved, by using a step knife receiver having a step so that the eyelet knife receiving portion is closer to the knife side, only the eyelet button portion can be formed, and in the end, the eyelet button button is formed. Hole, straight part,
It is possible to form three types of eyelet only. On the contrary, even when only the linear knife portion can be moved, if a stepped knife receiver having a step so that the linear knife receiving portion is closer to the knife side is used, only the eyelet button hole, the straight portion and the eyelet portion can be formed. Types can be formed. If it is not necessary to form only the eyelet portion, a flat knife receiver that can more efficiently form eyelet button holes than the step knife receiver may be used.

A tenth aspect of the present invention is a sewing machine cloth cutting apparatus according to the ninth aspect, wherein a plurality of control data for forming buttonholes and overlock stitches are stored as shown in FIG. 27, for example. The storage means (RAM 52) is provided for storing the control data in the eyelet button hole formed by the flat knife receiver and the cloth cutting knife, either the flat knife receiver or the step knife receiver, and the straight knife portion of the cloth cutting knife only. A hole type for selecting one of the following: forming a straight hole by using, forming a eyelet button hole by using a step knife receiver and cloth cutting knife, and forming an eyelet part by using a step knife receiver and eyelet knife part only. The selection data (data item 10) is included so as to form the hole selected by the hole type selection data,
A control means (CPU 54) for controlling and driving the cloth cutting drive means and the moving means at a predetermined timing is provided.

According to the tenth aspect of the invention, with respect to the hole type selection data, the fact that both the flat knife receiver and the step knife receiver can be attached is utilized to make a straight line with the eyelet knife portion of the cloth knife and the flat knife receiver. Eyelet button hole formed by the knife portion, formation of a linear hole formed by only the flat knife receiver or step knife receiver, and the straight knife portion only, eyelet knife portion of the step knife receiver and cloth cutting knife And forming the eyelet buttonhole by the straight knife portion and forming only the eyelet portion by the step knife receiving portion and only the eyelet female portion, whereby the cloth cutting drive means is controlled under the control of the control means. Then, the desired hole is formed by the moving means.

In the sewing machine cloth cutting device according to the eighth aspect, the movement by the moving means is specifically performed by the eleventh aspect.
Examples of configurations are as follows. That is, claim 1
The invention described in 1 is the cloth cutting device for a sewing machine according to claim 8, wherein the eyelet knife portion is a base for eyelet knife (104).
It is fixed with respect to, and moves between the first position and the second position by rotating the eyelet knife base. The invention described in claim 12 is the cloth cutting device for a sewing machine according to claim 8, wherein, for example, as shown in FIGS. 31 and 32, the eyelet knife portion (eyelet knife 101b) is
It is fixed to the eyelet knife base (304), and moves between the first position and the second position by linearly sliding the eyelet knife base.

The thirteenth aspect of the present invention is the sewing machine cloth cutting apparatus according to the eighth aspect, for example, as shown in FIG.
As shown in FIG. 4, both the eyelet knife portion (eyelet knife 501b) and the linear knife portion (straight knife 502b) are fixed to the cloth cutting knife base (rotating knife base 504), and the cloth cutting knife base rotates. Thus, the eyelet knife portion and the linear knife portion are alternately moved between the first position and the second position.

According to a fourteenth aspect of the present invention, there is provided a sewing machine cloth cutting apparatus according to the eighth aspect, wherein the eyelet knife portion is
The eyelet knife is fixed to the eyelet knife base (104) and is configured to move between the first position and the second position as the eyelet knife base moves. And a cloth waste path (101e, 104a) for collecting eyelet-shaped cloth scraps that are generated when the eyelet knife knife portion and the eyelet knife knife receiving portion match and the eyelet knife portion is formed on the workpiece.
Is formed in a direction that does not prevent the eyelet knife portion from moving, and the cloth waste that has passed through the cloth waste path is connected to the suction device (134) and is not connected to the cloth waste path.
33) is configured to be discharged into the inside.

By forming the eyelet portion, cloth dust is always generated,
Conventionally, this was collected through a predetermined route connected to the eyelet knife portion, but in the case where the eyelet knife portion is configured to move between the first position and the second position, what route is used for collection? Is practically important. According to the invention as set forth in claim 14, the cloth waste path for collecting the cloth waste generated when forming the eyelet section of the eyelet knife section and the eyelet knife base in a direction that does not prevent the movement of the eyelet knife section. Since it is formed from the inner side to the outer side, the cloth waste can be collected in a course that does not interfere with the movement of the eyelet knife portion. Moreover, the cloth waste discharged from the cloth waste path is surely discharged by being discharged into the pipe (133) connected to the suction device (134) and not connected to the cloth waste path. Sucked.
Also, since the cloth waste path and the pipe are not connected, that is, the path for collecting the cloth waste is divided in the middle,
It is possible to change only the cloth waste path on the knife side according to the moving direction of the eyelet knife part, etc.
The degree of freedom in designing the cloth waste path is high.

The invention described in claim 15 is, for example, as shown in FIG.
As shown in FIG. 2, a eyelet button hole (92) formed of a eyelet portion (90) and a straight portion (91) is provided in a sewing machine that forms a button hole in a sewing object and forms a buttonhole stitch around the button hole. ), An eyelet knife portion (412) forming the eyelet portion, and a linear knife portion (41) forming the straight portion.
3), a cloth cutting knife (411), a eyelet knife receiving portion (eyelet knife receiving portion 401) which is arranged vertically opposed to the cloth cutting knife and matches the eyelet knife portion, and the linear knife portion. Straight knife receiver that matches with (straight knife receiver 40
2) a cloth cutting means having a knife receiver having and a cloth cutting driving means for driving one of the cloth cutting knife and the knife receiver in the vertical direction so that the cloth cutting knife and the knife receiver come into contact with and separate from each other. A cloth cutting device (400) for a sewing machine, which cuts a material to be sewn to form a button hole when a cloth cutting knife and a knife receiver are in contact with each other, and the eyelet knife receiving portion and the straight knife receiver of the knife receiver are provided. At least one of the portions is configured to be movable so as to have a first position where the cloth cutting knife can be cut and a workpiece can be cut, and a second position where the cloth cutting knife does not match, and the eyelet knife. Among the receiving part and the linear knife receiving part, the one having the first position and the second position is provided with a moving means (air cylinder 110, spring 108) for moving between the first position and the second position. And

According to the fifteenth aspect of the present invention, of the knife receiver, by means of the moving means, at least one of the eyelet knife receiving portion and the straight knife receiving portion can match the cloth cutting knife and cut the sewing object. It is possible to move the first position and the second position that does not match the cloth cutting knife. Thereby, various button holes can be formed. For example, when the cloth cutting knife is a type in which the eyelet knife knife portion and the linear knife knife portion are formed to be substantially flat, and only the eyelet knife knife holder portion moves, when the eyelet knife knife holder portion is at the first position, the eyelet button button A hole can be formed, and a linear button hole (sleeping hole) can be formed when in the second position. Also, when only the straight knife receiving part moves, when the straight knife receiving part is in the first position, eyelet button holes can be formed, and when it is in the second position, only the eyelet part can be formed, which is used for flower holes, etc. it can. If both are movable, three types of eyelet button holes, sleep eye holes, and eyelet portions can be formed. Therefore, various button holes can be formed without replacing the knife receiver.

Further, according to a seventeenth aspect of the invention, the cloth cutting means can be moved relative to the object to be sewn in a direction parallel to the straight line portion of the eyelet button hole formed in the object to be sewn. If the relative moving means (for example, the feed table 14) is provided, it becomes possible to add the material while moving the cloth cutting means relative to the workpiece without replacing the knife receiver. , Can form buttonholes of various lengths. According to the seventeenth aspect, the relative moving means may move the entire cloth cutting means or the sewn object.

In the eighth and fifteenth aspects, either the cloth cutting knife or the knife receiver may be on the upper side.

In the cloth cutting device for a sewing machine according to a fifteenth aspect, the movement by the moving means is performed, for example, as in the invention according to the sixteenth aspect, in that the eyelet knife receiving portion is relative to the eyelet knife receiving base (404). It may be configured to move between the first position and the second position when the eyelet knife receiving base is rotated.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> Hereinafter, a case where a control device for a sewing machine is applied to a buttonhole sewing machine (hereinafter referred to as "sewing machine") will be described in detail. The sewing machine 10 shown in FIGS. 1 to 4 forms a button hole by automatic control and performs overlock stitching around the button hole.
As the button hole, for example, as shown in FIG. 9A, a drop-shaped hole (eyelet portion 90) and a linear hole (straight portion 9).
1) is an eyelet hole 92 formed by connecting (hereinafter, also referred to as “eyelet button hole”), and a sleep eye hole 94 formed only from a linear hole 93, as shown in FIG. 9C. There is.
1 shows a state where the cloth cutting knife 61 is lowered onto the knife receiver 62, and FIGS. 2 and 3 show the cloth cutting knife 6
1 shows the state where 1 is made to stand by at the origin position.

The sewing machine 10 includes a bed portion 11 on which a material to be sewn is placed, a pedestal portion 12 in a state of standing upward from the bed portion 11, and the pedestal portion 12 to the bed portion 11.
An arm portion 13 extending upward along the longitudinal direction thereof, a feed table 14 for moving a sewing object in a horizontal plane, a cloth presser 16 for pressing cloth on the upper surface of the feed table 14, and a control device 50 for controlling the operation of the sewing machine 10. (See FIG. 6), cloth cutting means 60 for forming button holes (see FIG. 5), cloth cutting knife driving means 20 for moving the cloth cutting means 60 up and down, and the like. Then, under the control of the cloth cutting knife driving means 20, with the cloth placed on the knife receiver 62, the cloth cutting knife 61 descends and presses the cloth and knife receiver 62,
It has a structure that forms a buttonhole.

First, the cloth cutting means 60 will be described with reference to FIG. As shown in FIG. 5A, the cloth cutting means 60
Is provided with a cloth cutting knife 61 and a knife receiver 62 which is arranged below the cloth cutting knife 61 so as to face it. The cloth cutting knife 61 shown in FIG. 5 is a so-called multiple knife in which the eyelet knife portion 61a forming the eyelet portion 90 and the straight knife portion 61b forming the straight portion 91 do not exist on the same height, In the sewing machine shown in the present embodiment, not only the plural times knife but also the illustration is omitted, but the portion forming the eyelet portion 90 and the portion forming the straight portion 91 are located at substantially the same height. A standard knife and a knife having only a straight blade for forming the sleep eye hole 94 are also used.

As described above, the cloth cutting knife 61 is composed of the eyelet knife portion 61a and the straight knife portion 61b, and the straight knife portion 61b is fixed to the eyelet knife portion 61a by the screw 61c. The straight female portion 61b is the eyelet female portion 61.
A female receiver 6 arranged on the lower side from a, that is, facing each other.
The blade portion projects in two directions, and the blade portion has an oblique shape in which one end on the eyelet knife portion 61a side projects from the other end.

The knife receiver 62 has a groove portion 62a into which the straight knife portion 61b can be inserted, on the side facing the straight knife portion 61b (see FIG. 5B), and on the side facing the eyelet knife portion 61a. The flat surface portion 62b is in contact with the eyelet female portion 61a. That is, the depth of the groove portion 62a is equal to that of the eyelet knife portion 6.
Straight female part 6 so that 1a and flat part 62b can contact
It is deeper than the length from the tip of the blade portion of 1b to the tip of the blade portion of the eyelet knife portion 61a. A gap 61d is provided between the straight female portion 61b and the eyelet female portion 61a, whereby the straight portion 91 of the eyelet button hole and the eyelet portion 9 are formed.
A portion that is not cut (hereinafter, referred to as a “non-cut portion”) is formed between 0 and 0.

When the cloth cutting knife 61 having such a structure is lowered, the controller 50 controls the driving of the cloth cutting knife driving means 20 described later, so that the cloth is cut only by the linear knife portion 61b. The position of the knife to be cut (hereinafter referred to as "straight part cutting position") and the position of the knife to be cut by both the straight knife part 61b and the eyelet knife part 61a (hereinafter, " It is provided with a structure capable of stopping the knife at both positions of "eyelet section cutting position".

The length of the straight female portion 61b is equal to or shorter than the shortest straight portion 91 of the eyelet hole 92 to be formed. Also, the eyelet female portion 61a
May have a substantially drop-like shape that cuts only the eyelet portion, or may have a shape having a slight linear portion below the lower end portion of the eyelet. Further, as described above, since the linear knife portion 61b is fixed to the eyelet knife portion 61a with the screw 61c, the linear knife portion 6 is attached to the eyelet knife portion 61a.
1b can be attached and detached, and when forming the eyelet hole 92 having a shape in which only the length of the linear portion 91 is different, the linear female portion 61b is lowered several times with respect to the cloth as will be described later. Instead of extending 91, it is also possible to replace the straight female portion 61b.

Next, the cloth cutting knife driving means 20 for driving the cloth cutting knife 61 will be described. As shown in FIGS. 1 to 4, the cloth cutting knife driving means 20 includes a cloth cutting motor 21, which is a pulse motor, a ball screw 24, and a link arm 3.
1, a drive shaft 35, a drive gear 39, and a direct drive shaft 40. A cloth cutting motor 21, which is an electric driving means, is fixed to the bed portion 11, and the driving force of the cloth cutting motor 21 is transmitted to the meshing ball screw gear 23 via the motor gear 22. This ball screw gear 23
It is attached to a ball screw 24 that is rotatably provided in a vertical direction with respect to the sewing machine 10. Therefore, the ball screw 24 is rotated by the driving force of the cloth cutting motor 21 via the ball screw gear 23. The ball screw nut 27 provided on the ball screw 24 can move up and down along the ball screw 24 by the rotation of the ball screw 24. A housing 28 is fixed to the upper portion of the ball screw nut 27 and moves up and down together with the ball screw nut 27.

Two link arms 31 are provided so as to sandwich both sides of the housing 28 (only one in FIG. 3), one end of each is rotatably attached to both sides of the housing 28, and the other end is A link shaft 32b is rotatably fixed to one end of a lever 34 formed in a bifurcated shape. As shown in FIG. 4, the drive shaft 35 is substantially parallel to the sewing machine frame 15 and is rotatably supported. The other end of the lever 34 is rotatably attached to one end of the drive shaft 35. Then, when the lever 34 is driven via the link arm 31 and rotates with the drive shaft 35 as a fulcrum so that one end side (link arm 31 side) lowers, the drive shaft 35 is rotated by the lever 34. Has become. Further, at the other end of the drive shaft 35, the drive gear 39
Is fixed. As shown in FIG. 2, the drive gear 39 meshes with a rack 41 formed on the upper portion of the linear motion shaft 40, and by rotating together with the drive shaft 35, the linear motion shaft 40 is moved up and down. ing.

The linear motion shaft 40 is housed in a substantially cylindrical linear motion metal 42 with the drive gear 39 side cut out, and the linear motion metal 42 is provided at two inner surfaces of the linear motion metal 42. In the groove 43 extending parallel to the length direction of the linear motion shaft 4
0 The convex portions 44 provided at two locations in the circumferential direction on the outer surface are the groove portions 4
By being fitted so as to be movable along 3, it is possible to slide up and down without rotating left and right. In addition, the linear drive shaft 4
A knife mount 63 is provided at the lower end of 0, and the cloth cutting knife 61 is mounted on the knife mount 63. Further, a knife receiver 62 is attached on a receiving base 64 provided in the bed portion 11 directly below the cloth cutting knife 61.

Next, the operation of the cloth cutting knife driving means 20 will be described. When the cloth cutting motor 21 operates, the motor gear 2
2. The ball screw 24 rotates via the ball screw gear 23, and the ball screw nut 27 and the housing 28 descend on the ball screw 24. As a result, the two link arms 31 connected to the housing 28 also descend, and the lever 3
One end of 4 is pushed down in the clockwise direction in FIG. Further, the lever 34 rotates the drive shaft 35 clockwise in FIG. When the drive shaft 35 rotates, the drive gear 39 provided on the drive shaft 35 rotates counterclockwise in FIG. The cutting knife 61 descends from the raised position to the straight section cutting position or the eyelet section cutting position to cut the sewing object on the knife receiver 62.

After cutting, the cloth cutting motor 21 is rotated in the reverse direction to move the ball screw nut 27 and the housing 28 upward, whereby the lever 34 is rotated and the drive shaft 35 is rotated.
Rotates in the counterclockwise direction in FIG. 3 and the drive gear 39 rotates in the clockwise direction in FIG.

Next, the control device 50 of the sewing machine will be described. As shown in FIG. 6, the control device 50 includes a ROM 5
1, a RAM 52, an EEPROM 53, a CPU 54, an interface 55, a drive circuit such as a spindle motor drive circuit 56a, and the like. (See FIG. 11) and the like are connected. In the ROM 51, a control program and control data necessary for forming buttonholes and overlock stitches are written.

The RAM 52 (storage means) stores a plurality of pattern data, and from among these data,
One piece of data selected via the operation panel 59 is stored. Further, when the value of the pattern data is changed, the changed value and the like are also stored. The method of selecting these data and the method of changing the data content will be described later. Further, the RAM 52 also functions as a memory area that is temporarily used in various processes during sewing. In addition, the stitch data generated from the pattern data and the knife dropping positions of the knife which will be described later are stored. The EEPROM 53 (storage means) stores a plurality of memory switch data.
Further, when the value of the memory switch data is changed, the changed value and the like are also stored.

As the pattern data, as shown in FIG. 7, there are, for example, 9 pieces of pattern data.
A specific value corresponding to the data item of is set.
Data item 1 is for setting the type of knife that forms the buttonhole. As shown in FIG. 8A, the eyelet female portion 6
The shape of 1a is defined by the width ew and the length el, the overall length of the cloth cutting knife 61 is defined by ma, the length of the linear knife portion 61b is defined by mb, and the eyelet knife portion 61 is formed.
The length of the gap 61d between the a and the straight female portion 61b is mc
8B, and these combinations are stored in advance in the memory switch data as a table as shown in FIG. 8B.

In the data item 1, the female No. A so-called standard knife, that is, a knife (not shown) in which a linear knife portion and an eyelet knife portion are integrated is set in 0 to 5, and the knife No.
6 to 10, a so-called multiple knife, that is, a gap portion 61d is provided between the straight knife portion 61b and the eyelet knife portion 61a. As will be described later, a cloth is used for cutting the uncut portion. A knife that needs to be lowered multiple times is set. The female No. 0 corresponds to a scalpel with only straight blades for forming the sleep eye holes 94. Data items 2 to 6 are data relating to the number of stitches and the length of each part constituting the eyelet hole overlock seam shown in FIG. 9A. That is, as shown in FIG. 9B, the data item 2 is the overhole length (ml), the data item 3 is the number of straight line stitches (ln), the data item 4 is the number of eyelet stitches (en), and the data item Reference numeral 5 is a straight line female space (ls), and data item 6 is an eyelet female space (es).

The data item 7 is to select a leading knife for performing cloth cutting before overedging and a rear knife for performing cloth cutting after overedging. The data item 8 is a cut length correction (lc) for changing (correcting) the length of the straight line portion 91,
The data item 9 is a sleep eye offset amount (cc) for offsetting the formation position of the linear hole 93 from the upper portion of the sleep hole overlock seam when forming the sleep hole overlock seam shown in FIG. 9C. ), The data item 10 is a cloth cutting knife 6 having an eyelet knife portion 61a and a straight knife portion 61b.
1 is lowered to the cutting position of the straight portion 91 to select the sleep eye (s) selected when the sleep eye hole 94 is formed in the cloth.
s).

It should be noted that ml corresponds to the data relating to the length of the boring stitch of the present invention, and lc is the eyelet hole 92 of the present invention.
Corresponding to the data for changing the length of the straight line portion 91 and the data for changing the length of the linear hole 93 of the sleep eye hole 94, ml-lc relates to the length of the button hole of the present invention. Corresponding to the data, cc corresponds to the data for changing the formation position of the linear hole 93 of the present invention along the length direction of the overlock stitch, and ma indicates the eyelet knife portion 61a of the present invention.
Corresponds to the data on the length, the mb corresponds to the data on the length of the straight female portion 61b of the present invention, and the mc corresponds to the data on the length between the eyelet female portion 61a and the straight female portion 61b of the present invention. However, ss is the eyelet female part 61 of the present invention.
The eyelet button hole 92 is formed in the workpiece by using both the a and the straight female portion 61b, or the straight female portion 61b is formed.
This corresponds to selection data for selecting whether or not to form the linear hole 93 in the sewn product by using only b.

The memory switch data is shown in FIG.
As shown in FIG. 1-36
The values corresponding to the items listed in the "Memory switch contents" column are set for each memory switch.
It is set as shown in the "Set value" column. For example,
Memory switch No. No. 1 is a female No. It has been input that the set value for the eyelet width (ew) of No. 1 is 2.1 mm. 13 is a female N
o. The setting value for the total knife length (ma) of 6 is 18
It has been input that it is mm.

The CPU 54 controls a series of processing relating to buttonhole sewing according to the control program and control data of the ROM 51. The CPU 54 is connected to the operation panel 59 via the interface 55, controls the display on the operation panel 59, and controls the operation panel 5
Upon receiving an input signal input via 9, the various settings are selected and changed. The operator can select each data shown in FIGS. 7 and 10 or change the selected data through the operation panel 59.

Further, the CPU 54 is connected to the spindle motor drive circuit 56a via the interface 55,
The rotation of the spindle motor 70 is drive-controlled. Spindle motor 70
Is a motor that drives an upper shaft that drives the sewing needle up and down, and a looper mechanism that cooperates with the sewing needle to form a stitch. The CPU 54 is connected to the X-axis motor drive circuit 56b via the interface 55, and
Y-axis motor drive circuit 56 via interface 55
It is connected to c and drives the feed table 14 in a predetermined direction while controlling the drive of the X-axis motor 71 and the Y-axis motor 72. Further, the CPU 54 is connected to the swing motor drive circuit 56d through the interface 55 and controls and drives the swing motor 73. The turning motor 73 causes the sewing machine needle and the looper to rotate, and radial stitches are formed around the eyelet holes 92 and the like.

Further, the CPU 54 uses the interface 5
5 is connected to the cloth cutting knife motor drive circuit 56e to control and drive the cloth cutting knife motor 74. Also, CP
The U 54 is connected to the start switch 57 via the interface 55, and when a start signal is input from the start switch 57, the U 54 drives the spindle motor 70 and the like at a predetermined timing to perform buttonhole oversewing and cloth cutting processing. Further, the CPU 54 is connected to the presser switch 58 via the interface 55, and the presser switch 58 is connected.
When a start signal is input from, the cloth pressing cylinder driving electromagnetic valve 75a connected to the cloth pressing cylinder 75 is driven at a predetermined timing to move the cloth pressing 16 up and down. Also again
The CPU 54 uses the interface 55 to detect the origin positions of the X-axis motor 71, the Y-axis motor 72, the swing motor 73, and the cloth cutting knife motor 74, the X-axis origin sensor 71a, the Y-axis origin sensor 72a, and the swing origin sensor. 73
a, which is connected to the cloth cutting knife origin sensor 74a, corresponds to a signal indicating whether or not each of these motors has returned to the origin position, and performs various controls based on this signal.

As shown in FIG. 11, the operation panel 59, which is the changing means in the present invention, has the pattern No. Display 59
a, pattern No. +/- key 59b, data item display section 59c, data item +/- key 59d, data display section 59e, data +/- key 59f, data setting key 59
g and a preparation key 59h. Pattern No.
The display unit 59a displays the pattern No. currently selected. Is displayed (“1” in FIG. 11), and the pattern number.
Different pattern data can be selected by changing the numbers one by one in the range of 1 to 9 with the +/- key 59b.

The data item display portion 59c has a pattern N
o. The data item in the pattern data selected on the display unit 59a is displayed ("2" in FIG. 11), and the number is changed one by one in the range of 1 to 10 by the data item +/- key 59d. By doing so, different data items can be selected. When a data item is selected on the data item display portion 59c, a preset number for that data item is displayed on the data display portion 59e. Then, the data display 59 is pressed by the data +/- key 59f.
The value can be changed by increasing / decreasing the number e by a predetermined interval within a predetermined range. The data setting key 59g
This is a switch operated when performing data setting work. That is, the data value can be changed by pressing the data setting key 59g. The selection or change of each item or number is confirmed by pressing the data setting key 59g again. The preparation key 59h is a key for preparing for the boring work and for preparing the stitch data or the like corresponding to the data value selected or reset after the completion of the setting work. The preparation key 59h also serves as a key for changing the memory switch data when it is pressed when the power is turned on.

Next, the flow of work for forming buttonhole stitches will be described with reference to the flowchart of FIG.
First, when turning on the main power (not shown) of the sewing machine,
If the preparation key 59h is also turned on at the same time, that is, if Yes in step S100, step S10
Moving to 1, the memory switch setting described later is performed. If No in step S100, or after setting the memory switch data in step S101,
Control goes to step S102.

In step S102, the pattern N
o. Whether or not the +/- key 59b is operated is monitored, and if it is turned on, that is, if it is Yes, step S
103, and the pattern No. Update. If No in step S102, or step S1
No. 03 pattern No. After updating, step S104
Move to. In step S104, it is monitored whether or not the data setting switch is operated, and if it is turned on, that is, in the case of Yes, data setting described later is performed in step S105. If No in step S104, or after setting the data in step S105, the process proceeds to step S106.

In step S106, the operation of the preparation key 59h is monitored. And when it is not operated, that is, N
In the case of o, the process returns to step S102, and in the case of being operated, that is, in the case of Yes, in step S107, these data are the drive sources such as the spindle motor 70 based on the set pattern data and the contents of the memory switch data. Data generated for driving, stitch data for each stitch, the number of times a knife has been dropped a plurality of times, the feed table 14
Position data, cloth cutting motor 2 that drives the knife
It includes data on the driving amount of 1 and the like. Then, in step S108, the cloth presser 16 is lowered to press the cloth against the upper surface of the feed base 14, and in step S109, X /
An origin search for moving the Y motors 71 and 72, the swing motor 73, and the cloth cutting knife motor 74 to the origin position is performed, and in step S110, the cloth presser 16 is raised.

In step S111, the operation of the work clamp switch 58 is monitored, and when it is turned on, that is, Y
In the case of es, the presser foot 16 is lowered in step S112. For example, when it is necessary for the operator to confirm the pressing position of the cloth by the cloth pressing member 16 and adjust the position of the cloth, the pressing switch 58 is pressed again in step S113.
By turning on, the work clamp 16 is raised in step S114, and the process returns to step S111. Also, step S1
If the presser foot switch 58 is not turned on in 13, that is, No, the operation of the start switch 57 is monitored in step S115, and if it is turned on, ie, Yes, the process proceeds to step S116.

In step S116, it is determined whether the leading knife is selected in the data item "7" in the pattern data shown in FIG. If it is a tip knife, step S11
In 7, the cloth cutting knife operation described later is executed. If No in step S116, or in step S116
After performing the cloth cutting knife operation in 117, step S11
At 8, a holing operation is performed. This boring operation includes a series of operations such as moving the feed base 14 to the sewing start position and thread cutting after boring.

After the boring operation is completed, the process proceeds to step S119, and the feed base 14, the needle bar and the like are moved to the origin position. Next, in step S120, it is determined whether or not the back knife is selected in the data item "7" in the pattern data. If the back knife is selected, that is, if Yes, the process proceeds to step S121, and the step The cloth cutting knife operation similar to that of S117 is executed. When it is determined in step S120 that the knife is not the rear knife, or after the cloth cutting knife operation in step S121 is completed, step S122
At that time, the work clamp 16 is lifted, the process returns to step S111, the operation of the press switch 58 is again monitored, and the above-mentioned boring operation is repeated when the press switch 58 is turned on.

Next, the flow of memory switch setting in step S101 will be described with reference to the flowchart of FIG. First, in step S400, "1" is displayed on the item display portion of the operation panel 59, and the memory switch No. The set value of 1 is displayed on the data display portion 59e. Next, in step S401, the operation of the data item +/- key 59d is monitored, and if it is turned on, that is, in the case of Yes, in step S402, the memory switch No. Is updated, and the data item display section 59c is updated.
And the corresponding value is displayed on the data display unit 59e. After step S402, or step S4
In the case of 01 and No, the process proceeds to step S403.

In step S403, the operation of the data +/- key 59f is monitored, and when it is turned on, that is, Y
In the case of es, in step S404, the memory switch No. displayed on the data item display portion 59c is displayed. The setting value corresponding to is updated, and the updated setting value is displayed on the data display unit 59e. After step S404, or if No in step S403, the process proceeds to step S405. In step S405, the operation of the preparation key 59h is monitored, and if it is not turned on, that is, if No, the process returns to step S401, and if it is turned on, that is, Ye.
In the case of s, the process proceeds to step S406, the set memory switch data is stored in the EEPROM 53, and then the process proceeds to step S102.

Next, the flow of data setting in step S105 will be described with reference to the flowchart of FIG. First, in step S300, "1" is displayed in the data item display portion 59c of the operation panel 59, and the female No. set in the data item 1 is displayed. Is displayed on the data display portion 59e. Next, in step S301, the operation of the data item +/- key 59d is monitored, and if it is turned on, that is, in the case of Yes, step S302
At, the data item number is updated and displayed on the data item display portion 59c, and the corresponding value is displayed on the data display portion 59e. After step S302, or if No in step S301, the process proceeds to step S303.

In step S303, the operation of the data +/- key 59f is monitored, and when it is turned on, that is, Y
In the case of es, in step S304, the value corresponding to the selected data item is updated, and the updated value is displayed on the data display unit 59e. After step S304, or if No in step S303, step S30
Go to 5. In step S305, the data setting key 5
9g operation is monitored, and when it is turned on, that is, Ye
In the case of s, the changed data is updated in step S306, and the process proceeds to step S106. If the data setting key 59g is not operated in step S305, the process returns to step S301.

Next, the flow of the cloth cutting knife operation in step S117 will be described with reference to the flowchart of FIG. First, in step S200, for example, the female No. set in the data item “1” in the pattern data is set. From, it is determined whether or not the scalpel is selected multiple times. And if it is not a scalpel multiple times, that is, N
In the case of o, the cloth cutting knife 61 is lowered in step S201 to form the eyelet button hole 92 in the cloth. As the cloth cutting knife 61, a knife No. 0, that is, sleep eye hole 94
When a knife having only a linear blade for forming the is selected, the sleep eye is formed by lowering the knife in step S201.

If it is determined in step S200 that the female is a plurality of times, that is, in the case of Yes, it is determined in step S202 whether or not a sleep eye hole is set in the data item "10" in the pattern data. Then, when the sleep eye hole is not set, that is, when the eyelet eye hole is set, the determination result is No in step S202, and the process proceeds to step S203. Step S
In 203, the cloth cutting knife 61 is moved to the eyelet cutting position.
By lowering, the eyelet part 90 and a part of the straight part 91 having the same shape as the eyelet knife part 61a and the straight knife part 61b of the cloth cutting knife 61 are formed on the cloth. In this state, since the cloth has the above-mentioned uncut portion, the memory switch No. 1 shown in FIG. The cloth cutting knife 61 is lifted from the upper surface of the feed table 14 to the idle feedable knife height (elevation height) set in 36, and in step S205, the feed table 14 is moved to the knife drop position calculated in step S107. To move.

Then, in step S206, the cloth cutting knife 61 is lowered to the straight line cutting position to cut the uncut portion, and then the process proceeds to step S207. The gap 61
When using a scalpel without d, step S204-
It does not need to be executed until 206. Also, step S
When it is determined in 202 that the sleep eye hole is set, the determination result is Yes and the process proceeds to step S212. Step S
In 212, the feed table 14 is moved to the above step S10.
The knife is moved to the first knife drop position calculated in 7. Then, in step S213, by lowering the cloth cutting knife 61 to the linear portion cutting position, a part of the linear hole 93 having the same shape as the linear knife portion 61b of the cloth cutting knife 61 is formed in the cloth. The process proceeds to S207.

In step S207, it is determined whether or not the knife dropping work has been performed the same number of times as the knife dropping number calculated in step S107. ,
The cloth cutting knife 61 is raised to the height of the knife that can be fed by the memory switch, and in step S209, the feed base 14 is moved to the next knife dropping position calculated in step S107. And step S
At 210, the cloth cutting knife 61 is lowered to the straight line cutting position, the cloth is cut by a predetermined amount, and the process returns to step S207. If Yes in step S207, that is, if a predetermined button hole is formed, step S2
11, the cloth cutting knife 61 moves to the origin position, and the process proceeds to step S118.

Here, as described above, step S20
In Nos. 5, 209 and 212, the cloth cutting knife 61 with respect to the feed base 14 is moved by moving the feed base 14 by a predetermined amount.
The position of (the knife dropping position) is relatively changed to form a predetermined amount of button hole. The knife dropping position is
For example, it is calculated as follows. In the following description, for easy understanding, the eyelet portion 90 is formed at a predetermined position on the cloth by lowering the cloth cutting knife 61 with the feed base 14 at the origin position. And In addition, as shown in FIG. 16 (a), the cloth cutting knife 6
The position of the rear end portion of the linear knife portion 61b of No. 1 is defined as the knife dropping position, and is represented using the Y coordinate. In addition, the knife dropping position is the origin in the Y direction (Y = 0) when the cloth is first cut.
Shall be located at.

First, the case where the eyelet holes 92 are formed in the cloth will be described with reference to FIG. First, in the state where the cloth cutting knife 61 is first lowered to form the eyelet portion 90 on the cloth, the eyelet portion 90 is formed at a predetermined position on the cloth and the knife dropping position is Y = 0 (Fig. 16
(A) See (1)). Next, the knife drop position for cutting the uncut portion is Y = mc because the length of the uncut portion is mc (see FIGS. 16A and 2B). Next, the knife drop position (see FIGS. 16A and 16C) for adding the length L of the straight portion 91 to the rear side is calculated as follows. First, L = ml-1
It becomes c-ma, and the number N of times of dropping the knife is represented by N = L / mb. Here, when L / mb has a remainder, it is rounded up to N = N + 1.

When the knife drop position for the i-th (i = 1 to N) knife drop for cutting the straight part 91 backward is Yi, Yi = -L × i / N. Then, i = N, that is, when the knife is dropped N times, Yi =-
It becomes L, and the cutting of the linear portion 91 is completed (see FIGS. 16A and 4). However, when N = 0,
That is, when it is not necessary to cut the straight line portion 91 backward, the knife drop position after cutting the uncut portion is not calculated.

Next, with reference to FIG. 16 (b), description will be made on the case of forming the sleep-eye holes 94 in the cloth. First, in order to form the linear hole 93 in the cloth, the knife dropping position when the cloth cutting knife 61 is first lowered is Y = ma-mb-cc (see FIG. 16 (b) (1)). . Next, the straight hole 9
The knife drop position (see FIGS. 16B and 2B) for adding the length L of 3 to the rear side by the length L is calculated as follows. First, L = ml-cc-lc-mb,
The number N of times the cloth cutting knife 61 is dropped is N = L / mb.
If there is a remainder in L / mb, round it up to N
= N + 1.

If the knife drop position for the i-th (i = 1 to N) knife drop for cutting the linear hole 93 backward is Yi, Yi = ma-mb-cc-L
× i / N. Then, i = N, that is, the cloth cutting knife 6
When 1 is dropped N times, the addition of the linear hole 93 is completed (see FIGS. 16B and 3C). However, when N = 0, that is, when it is not necessary to add the linear hole 93 to the rear side, Yi is not calculated. In addition,
In the above explanation, the explanation has been made assuming an ideal case for simplifying the explanation. However, in the case of forming the button hole by cutting off the knife multiple times, mechanical error or set Uncut portions may occur between the cuts due to the wrinkles of the cloth and the like. Therefore, in order to more reliably form the button hole, the cut portion when dropping each knife has a predetermined length (for example, about 1 m).
m) It is preferable to form the button hole by calculating the knife drop position so as to overlap with each other. To calculate the number of times the knife has been dropped or the position where the knife has been dropped, for example, refer to FIG.
When the CPU 54 calculates the knife drop position in step S107 of 2, the number of knife drops is set by shortening mb by a predetermined length u (for example, 1 mm) with respect to the setting value set in the memory switch setting content of FIG. Is calculated, and mc is made a predetermined length v (for example, 1 mm) longer to calculate the knife drop position. Specifically, FIG. 16A
For the eyelet boring, the knife dropping position in (2) is calculated as Y = mc + v, and the knife dropping frequency is N = L.
Calculate as / (mb-u). With regard to the drowsiness dagger of FIG. 16B, N = L / (mb-u) is set, and only the number of uncut portions N is calculated using mb-u.

Sewing machine control device 5 shown in this embodiment
According to 0, since the cut length correction (lc) can be set, by using the knife (cloth cutting knife 61) a plurality of times, the boring length (ml) and the length of the button hole to be formed. (Ml-lc) is set as a separate value. Therefore, in order to prevent fraying and reinforcement at the sewing start point and the sewing end point after forming the holed seam, bar-tacking may be formed so as to connect these two points. When the straight line portion 91 of the hole 92, the straight line hole 93 of the sleep eye hole 94, and the like extend to the position sandwiched between these two points, the presence of the straight line portion 91 and the straight line hole 93 , The needle may drop in the part without the cloth (incision part), and the bartacking sewing failure may occur. However, by setting the cut length correction (lc), the straight part 91 and the straight part 91 It is possible to prevent the hole 93 from extending to a position sandwiched between the sewing start point and the sewing end point and prevent the above-described sewing failure.

Further, the eyelet knife portion 61a and the straight knife portion 61
After forming the eyelet hole 92 with b, the drive of the sewing machine is controlled so that the linear female portion 61b forms the linear hole 93 following the linear portion 91 of the eyelet hole 92. 91 can be extended by a preset amount,
Straight part 9 without replacing cloth cutting knife 61 and knife receiver 62
Eyelet holes 92 having different lengths 1 can be formed.
Further, since the sleep eye selection (ss) can be set, the linear hole 93 of the sleep eye hole 94 can be formed by using only the linear knife portion 61b of the knife (cloth cutting knife 61) a plurality of times.
When forming 4, it is not necessary to replace with a predetermined cloth cutting knife.

Since the sleep eye hole 94 can be formed by cutting the cloth a plurality of times by the linear knife portion 61b, the sleep eye hole 9 can be formed without replacing the cloth cutting knife 61 and the knife receiver 62.
The length of the straight hole 93 of No. 4 can be changed. Further, since the sleep eye offset amount (cc) can be set, the linear hole 93 can be formed at an arbitrary position of the overlock stitch, and the cut length correction (lc) can be set.
The length of the linear hole 93 can be arbitrarily changed, and the sleep-eye hole 94 corresponding to various specifications can be formed.

The length of the buttonhole to be formed (ml-l
When c) is relatively long, the gap between the straight knife portion 65a and the eyelet knife portion 65b having a knife length (ma) that is substantially the same as the button hole length as shown in FIG. Cloth cutting knife 6 having a structure in which the length of the portion 65c is relatively long
5 and a knife receiver 66 corresponding to this cloth cutting knife 65 may be used. In this case, only the work of cutting the uncut portion is performed, and the work of adding the cut is omitted, or the number of times the knife is dropped can be reduced, and the cycle time required for forming the buttonhole can be shortened. Further, since the height of the knife that can be fed in can be set, if the height of the knife that can be fed in is set to be approximately the same as the thickness of the cloth, the amount of rise of the cloth cutting knife 61 becomes the minimum necessary amount, The cycle time for forming buttonholes can be shortened.

The present invention is not limited to the first embodiment and can be modified as appropriate. RAM, for example
52 stores the pattern data, and the EEPROM 53 stores the memory switch data.
RAM52 stores the memory switch data, EEPR
The OM 53 may store the pattern data, or the RAM 52 or the EEPROM 53 may store both the pattern data and the memory switch data. A floppy (registered trademark) disk may be used instead of the EEPROM 53. Also,
The data on the length of the buttonhole is ml-lc,
The length of the buttonhole may be directly set. In this case, the overhole length correction may be set so that the overhole length = (button hole length + overhole length correction).

Although the cloth cutting knife 61 is moved up and down by controlling the driving of the cloth cutting knife motor 74, the invention is not limited to this. A known actuator such as an air cylinder may be used as long as it can be stopped at three positions of a cutting position and a straight line cutting position. Further, using a so-called multiple times knife as the cloth cutting knife, provided with an actuator capable of individually controlling the movement of the eyelet knife portion and the linear knife portion of this cloth cutting knife,
When forming both the eyelet section 90 and the straight section 91, the eyelet knife section and the straight knife section may be lowered simultaneously, and when forming only the straight section 91, only the straight knife section may be lowered. .

A so-called standard knife is used as the cloth cutting knife, and an actuator capable of individually controlling the movements of the eyelet knife portion and the linear knife portion of the cloth cutting knife is provided, and both the eyelet portion 90 and the straight portion 91 are provided. When forming
The eyelet knife section and the straight knife section are simultaneously lowered to move the straight section 9
When forming only 1, only the linear knife portion may be lowered. Further, as the cloth cutting knife, a so-called standard knife in which the eyelet knife portion and the straight knife portion are integrated at the same height is used, and the knife receiver is used for the portion corresponding to the eyelet knife portion of the cloth cutting knife and the straight knife portion. The actuator may be divided into a portion corresponding to and the movement of each of these portions may be individually controlled, and the drive of the knife receiver may be controlled according to the shape of the button hole to be formed.

Further, two kinds of knife receivers, that is, a knife receiver for forming eyelet holes and a knife receiver for forming sleep eye holes are provided, and these two kinds of knife receivers can be arbitrarily selected by, for example, a turret system. A structure may be provided, and the knife receiver may be selected according to the shape of the button hole to be formed. Further, the number of pattern data, the number of data items, the number of memory switches, the operation method of the operation panel 59, and the like can be appropriately changed. The number of pattern data may be one. Further, in the above-described embodiment, a plurality of pattern data is stored and one of them is selected to create the stitch data, but a plurality of stitch data may be stored in the storage means (RAM 52).

Alternatively, a plurality of pattern data and stitch data corresponding to each pattern data may be stored. In that case, when the pattern data is selected, the stitch data may be automatically specified. In the present embodiment, the case where the cloth cutting knife 61 is arranged above and the descending drive is performed with respect to the knife receiver 62 arranged below is shown. Conversely, the knife receiver 62 is arranged above. Then, the cloth cutting knife 61 is arranged below and the knife holder 62
May be driven to descend. Further, during the operation of the cloth cutting knife shown in the flowchart of FIG. 15, either cutting the uncut portion or extending (cutting) the straight portion 91 may be performed first.

<Second Embodiment> Next, FIGS. 18 to 3 will be described.
4 shows the second embodiment of the present invention. The sewing machine 200 as an example of the present invention is the sewing machine 1 of the first embodiment.
No. 0 buttonhole sewing machine, and the cloth cutting device 2
Since the configuration other than 01 is exactly the same, the same members are denoted by the same reference numerals and description thereof is omitted. Hereinafter, the cloth cutting device 201 will be described in detail. This cloth cutting device 201 is for forming eyelet buttonholes 92 and sleep-eye holes 94 shown in FIG. 9 during buttonhole sewing.
Also in the second embodiment, the reference numerals of the respective parts of the female in FIG. 8A and the reference numerals of the respective parts of the button hole in FIGS. 9A and 9C will be described.

As shown in FIGS. 18 and 19, the cloth cutting device 201 has cloth cutting means composed of a knife unit 100 and a knife receiver 160, and the knife receiver 160 faces upward and the knife unit 100 faces downward. It is provided to do.
The female unit 100, as shown in FIGS.
Mainly, on the female base member 103, the eyelet female member 101
And a straight female member 102.

The eyelet female member 101 is composed of a support plate 101a which is a substantially rectangular flat plate having a main surface in the horizontal direction, and a cylindrical portion 101c which is erected from the support plate 101a and formed into a substantially cylindrical shape. A drop-shaped eyelet knife 101b for forming the eyelet portion 90 is formed at the upper end of the cylindrical portion 101c. The inside of the cylindrical portion 101c is a cloth waste path 101e penetrating in the vertical direction. Further, a notch 101d cut at a right angle is formed at the rear corner of the upper surface of the support plate 101a, and is locked by a stopper member 120 described later.

The straight female member 102 is integrally formed of a support plate 102a which is a substantially rectangular flat plate having a main surface in the horizontal direction, and a thin plate portion 102c standing upright from the support plate 102a. A straight portion 91 of the eyelet button hole 92 and a straight female knife 102b for forming a sleep eye hole 94 are formed at the upper end of 102c. Eyelet female 10
1b and the linear knife 102b constitute a cloth cutting knife, and the cloth cutting knife has a straight portion 91 formed by the straight knife 102b and a sleep eye hole 9 as can be seen from FIG.
It is provided so that the direction 4 is the front-back direction.

As shown in FIG. 20, the female base member 103 is a member for supporting the entire female unit 100 by a base plate 103a whose rear edge is formed in a substantially rectangular shape having an arc shape when viewed from above. The female base member 103 is fixed to the bed portion 200b with fixing screws 152, 152. Further, the guide key 150 fixed to the base plate 103a with the screw 151 is attached to the bed portion 20.
The base plate 1 can be formed by following a groove (not shown) formed in 0b.
03a is slidable in the left-right direction (up-down direction on the paper surface of FIG. 20) orthogonal to the front-rear direction, and the fixing screws 152, 1 with the left-right position appropriately adjusted.
It is fixed at 52.

A knife support member 103b for supporting the eyelet knife member 101 and the straight knife member 102 is integrally formed on the front portion of the knife base member 103 so as to stand up from the base plate 103a. The upper portion of the female support 103b is a rectangular parallelepiped block body 103c, and a concave surface (not shown) is formed on the upper surface of the block 103c.
The support plate 102a of the straight female member 102 is fitted in the concave surface. Further, one side edge of the support plate 102a is pressed from above by a straight knife fixing clamp 105b, and this straight knife fixing clamp 105b is fixed to a side surface of the block body 103c by a straight knife fixing screw 106b. Thereby, the straight line female member 102 is securely fixed to the block body 103c, that is, the female base member 103.

At the center of the inside of the block body 103c,
As shown by the broken line M2 in FIG. 21, the adjustment screw 115a,
115b is screwed on. These adjustment screws 115
By adjusting the screwing degree of a and 115b, the head of the adjusting screw 115a is appropriately projected to the eyelet knife base 104 side, whereby the eyelet knife base 104 in the upright state (the state of FIG. 21) is adjusted. The front position is decided.

Further, a rectangular parallelepiped recess 103d (FIG. 21) is formed inside the female support 103b.
The base 104 for eyelet knife is fitted in 03d.
A concave surface (not shown) is formed on the upper surface of the eyelet knife base 104, and the support plate 101a of the eyelet knife member 101 is formed on the concave surface.
Is inset. A fulcrum shaft 107 is attached so as to pass through the lower portions of the knife support 103b and the eyelet knife base 104, and the eyelet knife base 104 is attached to the knife support 103.
It is rotatable about a fulcrum shaft 107 with respect to b. Further, one side edge of the support plate 101a is pressed from above by a eyelet knife fixing clamp 105a, and this eyelet knife fixing clamp 105a is fixed to the eyelet knife fixing screw 106a.
It is fixed to the eyelet knife base 104 by. Thereby, the eyelet knife member 101 is securely fixed to the eyelet knife base 104.

On the side surface of the eyelet knife base 104 opposite to the eyelet knife fixing clamp 105a, the eyelet knife member 101 is provided.
A stopper member 120 for positioning is attached by a screw 121. A horizontal hole (not shown) is formed in the stopper member 120, and the position of the stopper member 120 in the front-rear direction can be moved by sliding the horizontal hole with respect to the screw 121. On the upper surface of the stopper member 120, an overhanging portion 120a that overhangs the upper surface of the eyelet knife base 104 is formed. After the stopper member 120 is appropriately slid and adjusted in position, the stopper member 120 is fixed to the eyelet knife base 104 with a screw 121, and the notch 101d of the eyelet knife member 101 is extended.
The eyelet knife female member 101 is positioned by abutting against the eyelet 20a, and is fixed by the eyelet knife fixing clamp 105a or the like as described above.

A spring 108 is fitted on the fulcrum shaft 107, and both ends of the spring 108 are respectively a base pin 109 fixed to the eyelet knife base 104 and a base plate 103a.
It abuts against and against. As a result, the eyelet knife base 104 is moved by the spring 108 as shown in FIG.
Is urged counterclockwise.

On the other hand, a double-acting air cylinder 110 is provided behind the female base member 103. The air cylinder 110 has set screws 113, 1 for the base plate 103a.
A cylinder screw 112, 112
It is fixed by. Rod 1 of air cylinder 110
A cylinder pin 114 is screwed into the tip of 10a. The tip of the cylinder pin 114 is in contact with the eyelet knife base 104.

A link hole 114a penetrating in the horizontal direction is formed in the cylinder pin 114, and the link hole 114a is formed.
A link 116 is passed through. When viewed from above, the link 116 is formed in a substantially U shape as shown in FIG. As shown in FIG. 21, both ends of the link 116 are formed in a U shape and are respectively hooked on link pins 117 and 117 fixed to the eyelet knife base 104. The link 116 is slidable with respect to the cylinder pin 114 and the link pins 117 and 117. An E-ring 118 is attached to each end of the link pins 117 and 117, and the link 116 is attached to the link pin 11.
The sliding movement of the link 116 is regulated so as not to be disengaged from 7, 117.

Rod 1 when air cylinder 110 is off
10a protrudes, at this time, the eyelet knife base 104 is pushed in the clockwise direction by the cylinder pin 114, and this force is larger than the biasing force of the spring 108.
4 maintains the standing state shown in FIG. Air cylinder 1
When 10 is turned on, the rod 110a retracts, the link 116 pulls the eyelet knife base 104 via the link pins 117 and 117, and the spring 10
The urging force of 8 causes the fulcrum shaft 107 to rotate in a counterclockwise direction and to fall down (see FIG. 22B). That is, the air cylinder 110 and the spring 108 serve as the moving means of the present invention. The drive source for operating the eyelet knife base 104 is not limited to a double-acting cylinder such as the air cylinder 110, but may be another type of cylinder or an actuator such as a solenoid or a motor. .

Inside the eyelet knife base 104, so as to be continuous with the cloth waste path 101e of the eyelet knife member 101,
The cloth waste path 104a is formed so as to extend obliquely backward and downward. The rear end of the cloth waste path 104a is an opening, and the cloth waste generated by cutting the cloth by the eyelet knife 101b passes through the cloth waste paths 101e and 104a,
It is designed to fall from the opening. Female base member 1
A hole (not shown) is also formed in the base plate 103a of No. 03, and the cylindrical boss 131 is press-fitted into this hole.
The cloth dust that has fallen from the opening falls into the boss hole 131a formed in the boss 131, or falls near the upper edge portion thereof. In this way, the path through which the cloth waste is discharged is interrupted at the opening of the cloth waste path 104a and continues to the boss 131 side. In addition, on the upper surface of the base plate 103a, a cloth dust guard 122 is set by the setscrews 123 and 123 so as to surround the rear of the boss hole 131a so that the cloth dust discharged from the opening of the cloth dust path 104a does not scatter. It is fixed.

Inside the boss 131, a boss hole 131a is formed.
The tip of the pipe 133 is attached so as to communicate with. The other end of the pipe 133 is connected to the inside of the suction device 134. The pipe 133 has a set screw 132 for the boss 131 and a set screw 1 for the suction device 134.
It is fixed by 35.

As shown in FIG. 18, the suction device 134 is installed inside the bed portion 200b. As shown in FIG. 21, a clasp 142 is fixed to the suction device 134, and the air tube 140 is fixed to the suction device 134 by the clasp 142. The air tube 140 supplies air from an air supply source (not shown) to the suction device 134, and the tip thereof is connected to the air pipe 136 inside the suction device 134 via the joint 141. The end of the air pipe 136 on the side of the joint 141 is squeezed,
The air supplied through the air tube 140 and the joint 141 is pressurized and supplied into the air pipe 136 in the arrow A direction. A connection pipe 137 that is exposed to the outside is connected to the tip of the air pipe 136, and a hose 138 is connected to the tip of the connection pipe 137 by an annular band 139. Also, the pipe 1
33 is connected to the air pipe 136 in the suction device 134.

Air is supplied from the air tube 140,
Wind is generated in the direction of arrow A, and negative pressure generated at that time causes wind in the direction of arrow B in the pipe 133. Due to this air flow, the cloth dust is sucked and guided to the outside of the sewing machine 200 by the hose 138. Note that FIG.
1, most of the pipe 133 and the connecting pipe 13
7, the hose 138 is shown in cross section, and the suction device 134
Shows the outline of the internal structure.

As shown in FIG. 22, the flat knife receiver 160 is fixed to the knife receiving mount 162, and has a flat lower surface on which the eyelet knife receiving portion 160b and the straight knife 102b which match the eyelet knife 101b are formed. A matching linear knife receiving portion 160c is formed. The material to be sewn is cut while pressing the cloth between the flat knife knife 160, the eyelet knife 101b, and the straight knife 102b to form a button hole.
The knife receiving mount 162 is fixed to the lower end of the linear motion shaft 40 of the knife receiving driving means (cloth cutting driving means) 170 having exactly the same configuration as the cloth cutting knife driving means 20 of the first embodiment. As a result, the knife receiver 160 is driven vertically by the knife receiver driving means 170 at a predetermined timing.

A lateral air hole 165 is formed inside the female receiving mount 162 to allow air to pass through in the lateral direction. One end of the lateral air hole 165 is closed by a cap 164, and a joint 163 is attached to the other end.
An air line 175 (FIG. 19) is connected to 3. The vertical air hole 1 extends downward from approximately the center of the horizontal air hole 165.
66 is formed, and the vertical air hole 166 is connected to the vertical hole 160a formed in the flat knife receiver 160. The vertical hole 160a is located directly above the eyelet knife 101b. Therefore, when air is supplied from the air line 175 through the joint 163, the air is blown out from the vertical hole 160a of the flat knife receiver 160a. The cloth waste cut by the flat knife receiver 160 and the eyelet knife 101b is dropped into the cloth waste path 101e in the eyelet knife member 101 by the air blown out from the vertical hole 160a.

By the way, as apparent from FIGS. 21 and 22 (a), a gap w is formed between the eyelet knife 101b on the eyelet knife base 104 in the upright state and the linear knife 102b.
There are two. The length of this gap w2 is equal to that of the flat knife receiver 1
It is set to be shorter than the length w1 at which 60 and the linear knife 102b match. In particular, it is preferable that w1−w2 = 2 mm or less. By setting in this way, the eyelet knife 101b, the straight knife 102b, and the flat knife receiver 16
When the eyelet button hole is formed between 0 and 0, the first operation is performed by the linear knife 102b and the flat knife receiver 160 when the first cut is made and then the uncut portion corresponding to the gap w2 is cut. The cutting end can be surely cut because the cutting end slightly overlaps the first cutting end. Here, the length of the gap w2 corresponds to the length mc of the first embodiment, and the flat knife receiver 160 and the straight knife 102 are provided.
The length w1 with which b matches corresponds to the length mb of the linear female portion 61b. Also in the following, the length of the gap w2 is “mc”
Then, the length w1 will be described as “mb”.

Further, in the cloth cutting device 201 of the present embodiment, a step knife receiver 167 can be attached as shown in FIG. 23 instead of the plane knife receiver 160. The lower surface of the step knife receiver 167 includes a straight knife receiver 169 that matches the straight knife 102b, and an eyelet knife receiver 168 that protrudes downward from the straight knife receiver 169 by a step 167a and matches the eyelet knife 101b. Step 167a
Is formed at a predetermined height, for example, a height of 2 to 3 mm, so that the straight knife 102b does not touch the straight knife receiving portion 169 when the eyelet knife 101b and the eyelet knife receiving portion 168 match each other. A vertical hole 167b is formed in the step knife receiver 167 like the flat knife receiver 160. When the stepped knife receiver 167 is used, only the eyelet portion 90 can be formed. Details of the operation will be described later.

In the cloth cutting device 201, as in the first embodiment, the eyelet knife and the straight knife are not divided, and a standard knife that is continuously formed integrally or a standard knife for sleep eye holes can be attached. Is.

The cloth cutting device 201 having the above structure forms a predetermined hole in the cloth in cooperation with the feed table 14 which is the relative moving means of the present invention for feeding the cloth in the front-back direction.
Hereinafter, the cloth cutting device 201 and the fourth feeding mechanical operation will be described with reference to FIGS. 20 to 26. 24 to 2
6A and 6B are views showing a state in which buttonholes are formed step by step, a gray color indicates a portion cut at that stage, a shaded portion indicates a portion cut at a previous step, and a symbol P indicates a stitched stitch around the buttonhole. . (1) A case will be described in which a flat knife receiver 160 is attached as a knife receiver, and eyelet buttonholes 92 are formed after sewing overlock stitches. First, after forming the overedging stitch P, the upper thread is cut by a mechanism (not shown), and the cloth (the object to be sewn) is conveyed by the feed table 14 to a predetermined cloth cutting position on the knife unit 100. At this time, the cloth cutting device 20
1 is an air cylinder 110 as shown in FIG.
Is off, the rod 110a projects and the cylinder pin 1
The eyelet knife base 104 is pushed by 14 to stand up. The eyelet knife 101b is at the first position where the material to be sewn can be cut.

By driving the knife receiving driving means 170, the flat knife receiving member 160 descends by a predetermined amount. When the flat knife receiver 160 descends to a position close to the eyelet knife 101b and the straight knife 102b, the knife receiver mount 16
Air starts to be supplied through the second joint 163, passes through the horizontal air hole 165 and the vertical air hole 166, and then from the vertical hole 160a,
Air is jetted toward the cloth waste path 101e of the eyelet knife member 101. The jetting of air from above causes the flat knife receiver 160 to rise after cutting the eyelet section 90, and the eyelet knife 1
Continue until it is separated from 01b. The flat knife receiver 160 continues to descend, and at the end, it matches the eyelet knife 101b and the straight knife 102b, and as shown in the gray color of FIG. A first cut h1 that is a part of 91 is formed. An uncut portion S corresponding to the above-described gap length mc exists between the eyelet portion 90 and the first cut h1.

During this cutting, when a drop-shaped cloth scrap is generated between the eyelet knife 101b and the flat knife receiver 160, the cloth scrap is pushed downward by the air blown from above, and the cloth scrap paths 101e and 104a are moved. As it is, it is discharged from the eyelet knife base 104 and is not scattered by the cloth dust guard 122,
It falls into the boss hole 131a of the boss 131 or its periphery. On the other hand, also in the suction device 134, air is supplied from the joint 141, and due to the negative pressure generated in the air pipe 136, the cloth waste is sucked into the boss hole 131a, enters the suction device 134, and the connection pipe 137, It is collected outside the sewing machine 200 through the hose 138. The timing of the air supplied from the joint 141 is not particularly limited, and may be any time from when the air is supplied from above through the joint 163 until the end of all the cloth cutting operations. It is more preferable that the air is supplied from 163 at almost the same time. At such a timing, the air from above is combined with the force of suction to reliably discharge the cloth waste, and it is also possible to use a common solenoid valve for supplying air to the joint 163 and the joint 141. Easy to configure and control.

Next, the knife receiving driving means 170 is operated in the reverse direction, the plane knife receiving 160 is raised to a height where it does not interfere with the movement of the cloth, and then stopped. At this time, the air cylinder 11
0 is turned on and the rod 110a is retracted. As a result, the link 11 passed through the cylinder pin 114
The eyelet knife base 104 is pulled by 6 and the eyelet knife base 104 is pulled by the biasing force of the spring 108.
Rotates about the fulcrum shaft 107 counterclockwise so as to fall and retracts, and the state shown in FIG. At this time, the eyelet knife 101b is in the second position that does not match the flat knife receiver 160. The reason why the eyelet knife base 104 is pulled not only by the biasing force of the spring 108 but also by the cylinder pin 114 via the link 116 depends on the following reason. The eyelet knife 101b may be in contact with a cloth to be sewn. If only the spring 108 is used, the eyelet knife base 104 may be formed due to a frictional force between the eyelet knife and the cloth.
Is hard to fall over. So pull it with the cylinder pin 114,
The eyelet knife base 104 can be reliably retracted.

After the rod 110a of the air cylinder 110 is pulled in, the feed table 14 is operated to move the cloth to the next cutting position. Again, since the flat knife receiver 160 is lowered by the knife receiving driving means 170 and the eyelet knife 101b is retracted, only the straight knife 102b is matched, and
In FIG. 4 (b), the second cut h2 shown in gray is formed. By this cutting, the eyelet portion 90 and the straight portion 91 are connected.

Here, if the cutting length has not reached "sewing length (ml) -cut length correction (lc)", the flat knife receiver 160 moves up again to a position where it does not interfere with the movement of the cloth, The cloth is moved to a predetermined position by the feed base 14, the flat knife receiver 160 descends, and matches the straight knife 102b,
A third cut h3 shown in FIG. 24 (c) is formed. As a result, an eyelet button hole 92 including the eyelet portion 90 and the straight line portion 91 is obtained. In this example, the cutting is completed by three times of operations, but the number of times is one example, and when forming the eyelet button hole, any number of times may be used as long as it is two or more times. It should be noted that since no cloth waste is generated during the second and subsequent cutting, the joint 16
It is not necessary to supply air to 3, 141. After the above cutting operation is completed, processing such as bobbin thread cutting is completed.

Further, the movement of the cloth by the feed table 14 before the second and third cuts is always adjusted so that the cloth is overlapped with the cut cut before that. The specific degree of overlap depends on the values of the length mb and the gap length mc, but is 1 mm or more away from the apex portion of the eyelet portion 90, and the eyelet portion 9
The second cutting is performed so that 0 and the first cut h1 overlap with each other by about the same amount (about 1 mm each). Also in the case of the third cutting, it is preferable to cut so as to overlap with the second cut h2 cut for the second time by 1 mm or more. That is, the moving amount of the feed base 14 during the cloth cutting operation is the same as that of the knife No. And the like, "the length that can be cut in the first time (the eyelet 90 apex to a part of the straight line portion 91)", "the actual cutting length mb by the straight line knife 102b", and "remaining cut length" are calculated and controlled. It is supposed to be done. Details of the control will be described later.

(2) A case where the overlock stitch P is sewn around the eyelet button hole after the eyelet button hole is formed will be described. First,
After the cloth is conveyed to a predetermined cutting position by the feed table 14,
(1) Cutting is performed in the same manner, and then the feed table 14 conveys it to the sewing position, and thereafter, processing such as thread trimming is performed.

Next, (3) the case of forming the sleep eye hole 94 with the flat knife receiver 160, and (4) the step knife receiver 167.
The case of using will be described. However, as is clear from the above (1) and (2) regarding overlock stitching, the temporal front-rear relationship between overlock stitching and cloth cutting is determined by the cloth cutting device 20.
Since it does not directly relate to the operation of 0 itself, only the operation of the cloth cutting device 200 will be described below. (3) A case of forming the sleep eye hole 94 will be described.
First, the air cylinder 110 is turned on, and the rod 110
22A is pulled in, the eyelet knife base 104 is pulled, and the eyelet knife base 104 is retracted by the biasing force of the spring 108, and the state shown in FIG. In this state, the feed table 14 conveys the cloth to a predetermined cloth cutting position. Since the knife receiving driving means 170 is operated, the flat knife receiver 160 is lowered by a predetermined amount, and the eyelet knife 101b is retracted, only the straight knife 102b is matched, as shown in FIG.
The first cut h4 shown in gray is formed.

When the cutting amount does not reach the required length,
Similar to the second operation of (1), the flat knife receiver 160 moves up to such an extent that it does not interfere with the movement of the cloth, the feed base 14 moves a predetermined distance, and the flat knife receiver 160 is lowered again to perform the second cutting. , The second cut h5 as shown in FIG.
Is formed. Similarly, when the third cutting is performed, as shown in FIG.
As shown in (c), the third cut h6 is cut, and the sleep eye hole 94 is formed. In the case of the sleep eye hole 94, by changing the numerical values of the “sleep eye offset amount cc” and the “cut length correction lc”, the cutting position and the cutting length can be arbitrarily changed with respect to the overlock stitch length. it can.

As described above, in the case of the sleep eye hole 94, the eyelet knife base 104 is retracted at the beginning of the cutting operation, and cutting is performed only by the straight knife 102b. Further, since no cloth dust is generated, air is not supplied to the joints 163 and 141. In addition, the feed platform 14 before the second and third cutting
The position of the movement amount is adjusted so that it overlaps with the notch cut before the eyelet button hole 92 by 1 mm or more. As described above in (1) to (3), the eyelet button hole 92 and the sleep eye hole 94 can be switched and the cutting length can be freely changed without replacing the knife and the knife receiver.

(4) Next, the case where the stepped knife receiver 167 is attached to the knife receiver mount 162 will be described. When forming a hole such as an eyelet button hole 92 or a flower hole in the step knife receiver 167, first, the cloth cutting device 201
23A, when the air cylinder 110 is off, the rod 110a projects and the cylinder pin 11
The eyelet knife base 104 is pushed by 4 to stand up.

By driving the knife receiving driving means 170, the step knife receiver 167 descends by a predetermined amount. Since the step knife receiver 167 is provided with the step 167a, it matches only the eyelet knife 101b, and only the eyelet portion 90 is formed as shown by the gray color in FIG. 26 (a). When forming only a hole such as a flower hole, the step knife receiver 167 is raised to its original position and the operation is completed. In the case of the eyelet buttonhole 92, the air cylinder 110 is turned on after this, and the eyelet knife base 104 is retracted, as shown in FIG.
It becomes the state of. On the other hand, the operation of raising the step knife receiver 167 to a height not interfering with the movement of the cloth, moving the cloth by the feed table 14 and lowering the step knife receiver 167 is repeated for the required length, and as shown in FIGS. As indicated by the gray color in d), the first cut h7, the second cut h8, and the third cut h
9 are sequentially cut to form eyelet buttonholes 92. In addition, the feed base 1 before the second, third, and fourth cutting
Each of the movements of the cloth by 4 is moved so as to slightly overlap, for example, 1 mm or more with the cut portion formed before that.

Similarly to the above (1), when the step knife receiver 167 descends to a position near the eyelet knife 101b at the time of the first cutting, the joint 1 of the knife receiver mount 162 is cut.
Air starts to be supplied through 63, and the step knife receiver 167
The cloth waste path 101e of the eyelet female member 101 from the lower surface of the
Air is jetted toward. Along with this, air is also supplied to the joint 141 on the suction device 134 side. This air is supplied by the step knife receiver 16 after cutting the eyelet 90.
7 continues to rise until it is sufficiently separated from the eyelet knife 101b.

Using the stepped female receiver 167, the sleep eye hole 9
The case of forming No. 4 is exactly the same as the above (2). As described above, by using the stepped female receiver 167, only the eyelet portion 90, the eyelet button hole 92, and the sleep eye hole 94 can be formed, and the lengths of both button holes can be freely changed.

Next, the control device 180 provided in the sewing machine 200 will be described with reference to FIG. Control device 1
Since 80 is almost the same as the control device 50 of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted. Below, only the points different from the first embodiment will be described. In the control device 180, an air cylinder drive electromagnetic valve 76a for driving the air cylinder 110 is connected to the CPU 54, which is a control means, via an interface 55. The CPU 54 drives the air cylinder drive solenoid valve 76a at a predetermined timing via the interface 55, and thereby tilts or raises the eyelet knife base 104. Further, by the control device 180,
The air tube 140 and the air line 1 are connected via the interface 55 and the air compressor drive solenoid valve 77a.
The on / off operation of the air compressor 77b that supplies air to the air compressor 75 is controlled.

The RAM 52, like the first embodiment,
It is a storage unit that stores a plurality of pattern data, stores one data selected from these data via the operation panel 59, and also stores the changed value of the selected data value. As data items of pattern data,
It is almost the same as FIG. 7 except for the data item 10. The data item 10 which is the hole type selection data of the present invention, when one of the flat knife receiver 160 and the step knife receiver 167 is used as a knife receiver, the following four types of sewing are performed on the workpiece. It is something to choose. Formation of eyelet buttonholes 92 by the flat knife receiver 160 (hereinafter, "plane knife receiver / eyelet buttonhole" formation). Formation of the sleep eye hole 94 by the flat knife receiver 160 or the step knife receiver 167 (hereinafter, “sleep eye hole” formation). Formation of eyelet button holes 92 by the step knife receiver 167 (hereinafter, "step knife receiver / eyelet button hole" formation). One of the formation of only the eyelet portion 90 by the step knife receiver 167 (hereinafter, “step knife receiver / eyelet portion only” formation) is selected.

In accordance with this, “ss” as the data item name becomes “sleeping eye / eyelet selection” instead of “sleeping eye selection”, and the selection data for selecting which of the above Corresponding to. Specifically, "0" is set when "Plane knife receiving / eyelet button hole" is selected, and "1" is set when "Sleeping eye hole" is selected.
"2" when selecting "Step receiving knife / eyelet button hole"
And when selecting “only stepped knife receiving / eyelet part only”, by setting “3”, a desired hole and overlock stitch can be set.

Also, the setting contents of the memory switch are almost the same as those in FIG. The value of 36 is “the height of the knife that can be fed by blank feed”.

As in the case of the first embodiment, the actually attached female No. According to the data item 1, the female No. Is to be selected. Also in the present embodiment, the female No. The standard knife is set to 0 to 5, and the knife No. Numbers 6 to 10 are set as a knife that is composed of an eyelet knife member 101 and a straight knife member 102, that is, a knife that needs to be driven twice or more to form an eyelet button hole.

Next, the flow of the work for forming buttonhole stitches will be described using a flowchart. The general flow (FIG. 12), the memory switch setting process (FIG. 13), and the data setting process (FIG. 14) in the first embodiment are the same in the second embodiment. FIG. 28 shows the flow of the cloth-cutting knife operation characteristic of the present embodiment.
This will be described with reference to the flowchart of. As a premise, the operator attaches an appropriate knife and knife receiver according to the hole to be formed and sets predetermined data from the operation panel 59 accordingly.

First, in step S500, for example, the female No. set in the data item "1" in the pattern data is set. From, it is determined whether or not the scalpel is selected multiple times. If the standard knife and the flat knife receiver 160 are attached, the knife is not a plural number of times but No, and the flat knife receiver 160 is lowered in step S518 to form a button hole in the cloth. At this time, the female No.
0, that is, if a knife having only a linear blade for forming the sleep eye hole 94 is selected, step S
At 518, a sleepy eye was formed and the female No. When 1 to 5 are selected, eyelet button holes are formed.

If it is determined in step S500 that the female is a scalpel a plurality of times, in step S501,
The setting of the data item “10” in the pattern data is ss = 1.
Or not, that is, whether or not the sleep eye hole is selected. Then, when the sleepy eye hole is not selected, that is, when ss = 0, 2, 3 is selected, the process proceeds to step S502. In step S502, the flat knife receiver 160 or the step knife receiver 167 is lowered to a predetermined cutting position. If the plane knife receiver 160 is used as the sewing object, part of the eyelet portion 90 and the straight portion 91 according to the shape and size of the eyelet knife 101b of the eyelet knife member and the straight knife 102b of the straight knife member 102. Is formed. With the step knife receiver 167, only the eyelet portion 90 is formed. Next, in step S503, the air compressor 77b is turned on for about 50 milliseconds and then turned off.

Then, in step S504, it is determined whether or not the setting of the data item "10" in the pattern data is ss = 3, that is, only the eyelet portion 90 is selected. When only the eyelet section 90 is selected (Yes)
Since the cloth cutting operation ends, the process proceeds to step S513. When the setting of the data item 10 is either ss = 0 or 2, that is, when the eyelet buttonhole 92 by the flat knife receiver 160 or the step knife receiver 167 is selected, the process proceeds from step S504 to step S505. In step S505, the memory switch N
o. The flat knife receiver 160 (step knife receiver 167) is lifted to a height which does not interfere with the movement of the feed base 14 in accordance with the “idle feed possible knife height” set in 36. Next, in step S506, by turning on the air cylinder 110, the eyelet knife female member 101 falls down as shown in FIG. 22B or FIG. 23B, and the process proceeds to step S507. After that, only cloth cutting with the linear knife 102b is possible.

In step S507, the feed table 14 is moved to the step w1 corresponding to the gap w1 (FIG. 22A).
It is moved to the second cloth cutting position calculated in 07. The amount of movement at this time is controlled so that the knife receiver descends to a position where it slightly overlaps the cut end cut as described above. Specifically, with the flat knife receiver 160,
It is a position for cutting the uncut portion corresponding to the gap w2, and if it is the step female receiver 167, the eyelet portion 90
It is a position where the tip portion of the straight portion 91 connected to is cut. Next, in step S508, the flat knife receiver 16
0 or the step knife receiver 167 is lowered to the cutting position, the cloth is cut, the process proceeds to step S509, and the process proceeds to step S509.

On the other hand, if it is determined at step S501 that Yes, that is, ss = 1 and the sleep eye hole is selected, the process proceeds to step S515. Step S
At 515, the air cylinder 110 is turned on, and the eyelet knife member 101 falls. After that, only the cutting with the straight female member 102 is possible. Then step S
In 516, the feed base 14 is moved to the first knife receiving position (cloth cutting position) calculated in step S107. Then, in step S517, the flat knife receiver 160 or the step knife receiver 167 is lowered to the cutting position, and a linear hole corresponding to the shape of the straight knife 102b and the matching length with the knife receiver is formed in the sewing object. Step S
Move to 509.

At step S509, at step S10
It is determined whether or not the knife receiving operation has been performed the same number of times as the knife removing frequency calculated in 7. If No,
In step S510, similarly to step S505, the flat knife receiver 160 or the step knife receiver 167 is raised to the idle feed height. Next, in step S511, the feed base 14 is moved to the next knife receiving position (cloth cutting position) calculated in step S107. Then, in step S512, the knife receiver is moved down to the cutting position and cut for a predetermined length, and then in step S512.
Returning to step 509, it is determined again whether or not the knife receiving operation has been performed the same number of times as the knife removing time calculated in step S107. If Yes, that is, if the formation of the button hole is completed, step S513 is performed. Move to. Here, the flat knife receiver 160 or the step knife receiver 1
67 is raised to the original origin position (uppermost position), then, in step S514, the air cylinder 110 is turned off, the eyelet knife member 101 is erected, and the cloth cutting knife operation processing is ended. When step S514 is reached after step S504 or step S518, the air cylinder 110 remains off, but there is no problem even if an off command is output while the air cylinder 110 is off.

By the way, step S502 and step S
The lowering position in the cutting for forming the eyelet button hole 92 or the eyelet portion 90 of 518 and the other lowering positions are controlled so that the former is lowered to a lower position. This is because the mating area is larger when the eyelet is formed and it is necessary to push the knife receiver with a stronger force.

Here, as described above, step S507.
In steps S511 and S516, the cloth feed device 14 is moved by a predetermined amount, so that the cloth cutting device 2 for the paper feed pad 14 is moved.
The position of 01 (female receiving position) is relatively changed to form a buttonhole of a predetermined length. This knife receiving position is calculated as follows, for example. Hereinafter, a method of calculating the knife receiving position will be described with reference to FIG. 29 (a), ss = 0, (b) ss = 1,
(C) is a figure for demonstrating the case where ss = 2 and (d) is ss = 3. Further, the situation of the cloth cutting device 201 at the time of cutting at each position shown in FIG. 29 is schematically shown in FIG.

For easy understanding, by lowering the knife receiver with the feed base 14 at the origin position,
The eyelet portion 90 is formed at a predetermined position on the cloth.
In addition, as shown in FIG. 29A, the flat knife receiver 160
The rear end portion of the matching area between the (step knife receiver 167) and the straight knife 102b is used as the knife receiving position, and is represented using the Y coordinate. In addition, the knife receiving position in the state where the cloth is first cut in FIG. 29A is the origin (Y = 0) in the Y direction, and (b) to (d) match (a) to (a). The same position as) is set to Y = 0.

First, the case where the eyelet button holes 92 are formed in the cloth by using the flat knife receiver 160 will be described with reference to FIG. When the plane knife receiver 160 is first lowered to form part of the eyelet portion 90 and the straight portion 91 on the cloth, the knife receiving position is a predetermined position where Y = 0 as described above (FIG. 29). (See (1) of (a)). At this time, the flat knife receiver 160 and the eyelet knife member 101.
The relationship with the straight line female member 102 is as shown in FIG.

Next, since the length of the uncut portion is mc, the knife receiving position for cutting the uncut portion corresponding to w2 is as shown in (2) of FIG. 29 (a). , Y = mc. Next, the knife receiving position (see FIGS. 29 (a) and (3)) for cutting the length of the straight portion 91 backward by the length L (remaining cut length) is calculated as follows. To be done. First, L = ml-lc-ma, and the number N of times the flat knife receiver 160 is dropped is represented by N = L / mb. Here, when L / mb has a remainder, it is rounded up to N = N + 1.

When the knife receiving position for the i-th (i = 1 to N) knife receiving for cutting the straight portion 91 backward is Yi, Yi = -L × i / N. Then, i = N, that is, when the female is dropped N times,
Yi = -L, and the cutting of the straight line portion 91 is completed (see FIGS. 29 (a) and (4)). However, N = 0
In the case of, that is, when it is not necessary to add the straight portion 91 to the rear side, the knife receiving position after cutting the uncut portion is not calculated. In (2) to (4) of FIG. 29A, the eyelet knife member 101 is in the tilted state shown in FIG. 30B, and the flat knife receiver 160 and the straight knife member 1 are shown.
Matches only 02.

Next, the case where the sleep-eye holes 94 are formed in the cloth will be described with reference to FIG. Sleeping eye hole 94
When forming the
0 or the stepped knife receiver 167 may be used. In any case, the eyelet knife member 101 falls down, as shown in FIG.
As shown in (d), the knife receiver is a linear knife member 102.
It is in a state that only matches with. When forming the sleep eye hole 94, first, the flat knife receiver 160 (step knife receiver 16
The knife receiving position when lowering 7) is Y = ma-m
b-cc (see FIG. 29 (b) (1)). next,
A knife receiving position for adding the length L of the straight hole 93 to the rear side (see FIGS. 29B and 2).
Is calculated as follows. First, L = ml-cc-
lc-mb, and the number N of times the flat knife receiver 160 (step knife receiver 167) is dropped is N = L / mb. Here, when L / mb has a remainder, it is rounded up to N = N.
Set to +1.

If the knife receiving position for the i-th (i = 1 to N) knife dropping for cutting the linear hole 93 backward is Yi, Yi = ma-mb-cc
−L × i / N. Then, when i = N, that is, when the flat knife receiver 160 is dropped N times, the addition of the linear hole 93 is completed (see FIGS. 29B and 3C). However, when N = 0, that is, when it is not necessary to add the linear hole 93 to the rear side, Yi is not calculated.

Next, the case where the eyelet button hole 92 is formed by using the stepped female receiver 167 will be described with reference to FIG. First, in order to form the eyelet section 90 on the cloth, the knife receiving position when first lowering the step knife receiver 167 is the eyelet section 90 formed at a predetermined position of the cloth as described above, and Y = 0. Become. At this time, as shown in FIG. 30 (C), the stepped knife receiver 167 is attached to the eyelet knife member 101.
And not the straight female member 102, and only the eyelet portion 90 is formed.

Next, the length of the straight line portion 91 is set to the rear side by the length L.
Position for receiving knife to cut off only (Fig. 29 (c)
(See (2) to (4)) is calculated as follows. During (2) to (4) of FIG. 29C, the eyelet knife member 101 is tilted as shown in FIG.
7 matches only with the linear female member 102. First, the first knife receiving position of the straight portion 91 is Y = mc because the length of the uncut portion is mc (FIG. 29).
(C) See (2)).

Next, the length of the straight line portion 91 is changed to the length L on the rear side.
The knife receiving position ((3) in FIG. 29 (c)) for cutting off only is calculated as follows. That is, L = m
1-lc-ma + mc, and the number of times the knife receiver is dropped N
Is represented by N = L / mb. Here, when L / mb has a remainder, it is rounded up to N = N + 1. Then, the i-th time (i =
1 to N), Yi = m
It becomes c−L × i / N. Then, i = N, that is, when the knife receiver is dropped, Yi = -L + mc = ml-lc-
ma, and the cutting of the straight line portion 91 is completed ((4) in FIG. 29C). Note that, in the above description, similar to the description in the first embodiment, description has been made assuming an ideal case for simplifying the description, but in reality, the first embodiment In the same manner as the above, the number of times the knife is received by shortening mb by a predetermined length u (for example, 1 mm) with respect to the set value set in the memory switch setting contents to prevent the uncut portion between the cuts. Is calculated, the mc is set to be a predetermined length v (for example, 1 mm), the knife receiving position is calculated, and a button hole is formed so that the cuts at each time of knife receiving overlap by a predetermined amount. Specifically, in the case of the eyelet overhollowing shown in FIG.
The knife receiving position in (2) is calculated as Y = mc + v, and the knife receiving number (N) is N = L / (mb-
Calculate as u). In the case of the sleep overhollowing of FIG. 29B, N = L / (mb-u) is set and the number of uncut portions N
Is calculated using mb-u. 29 (c) In the case of eyelet boring, the knife receiving position in (2) is set to Y.
= Mc + v, and the number of times of knife reception (N) after (3) and the i-th knife reception position (Y)
i), N = L / (mb-u), L = ml-lc-ma
It is calculated as + mc + v and Yi = mc + v−L × i / N.

Next, based on FIG. 29 (d), eyelet section 90
The case of forming only one will be described. At this time, as shown in FIG. 30C, the step knife receiver 167 matches only the eyelet knife member 101 and does not match the straight knife member 102. In this case, when the stepped knife receiver 167 is first lowered to form the eyelet portion 90 on the cloth,
As described above, the eyelet portion 90 is formed at a predetermined position on the cloth, and the knife receiving position is Y = 0 ((1) in FIG. 29D). Since the straight line portion 91 is not cut, this is the end.

Sewing machine 2 equipped with the above cloth cutting device 201
According to 00, when the eyelet knife member 101 is rotated, the eyelet knife 101b is configured to move between the first position where cloth cutting can be performed and the second position where it is retracted. When the plane knife receiver 160 is used, the eyelet button hole 92 and the sleep eye 94 can be switched and the cutting length can be freely changed without changing the knife receiver and the knife. . Further, if the stepped knife receiver 167 is used, the eyelet 90, the eyelet button hole 92, and the sleep eye hole 94 can be formed without replacing the knife and the knife, and button holes of various lengths can be formed. Can be formed.

Further, according to the sewing machine 200, since the control is performed according to the same pattern data and control method as in the first embodiment, the cut length correction (lc) is set as in the first embodiment. By doing so, the linear portion 91 and the linear hole 93 can be prevented from extending to a position sandwiched between the sewing start point and the sewing end point, and the above-mentioned sewing failure can be prevented. Further, since the sleep eye offset amount (cc) can be set, the linear hole 93 can be formed at an arbitrary position of the overlock stitch, and the cut length correction (lc) can be set, so that the linear hole 93 can be set. The length of the eye can be changed arbitrarily, and it becomes possible to form the sleep eye hole 94 corresponding to various specifications. Also,
Since the height of the knife feedable knife receiver can be set, if you set the height of the knife feedable knife holder to approximately the same height as the thickness of the cloth, the amount of rise of the knife holder will be the minimum necessary amount and the button hole The cycle time required for formation can be shortened.

In addition, the sewing machine 200 also has the following operational effects as compared with the sewing machine of the first embodiment. 1. Not only eyelet knife 101b, but also straight knife 102b
Since the blade is also cut by the push-cut method, the blade edge of the linear knife 102b can be made rounder than the linear knife portion 61b of the first embodiment, so that it is difficult to hook the cloth when setting the cloth. Further, since the cutting edge is round, the sharpness of the knife is unlikely to deteriorate, and dragging of the cloth at the time of cutting due to the reduced sharpness does not occur. In addition, since the groove is not formed on the knife receiving side as in the first embodiment due to the push-cutting, the work of removing the chips in the groove is not required.

2. In the first embodiment, the cloth waste path is provided in the pocket portion as indicated by reference numeral 17, but in the second embodiment, the cloth waste path is provided as the bed portion 200.
Since it is provided on the b side, the pocket under the arm can be used widely. 3. The cloth waste guards 122 allow the cloth waste paths 101e, 104
The cloth scraps that have passed through a are not scattered and are easily collected at a predetermined position on the base plate 103a.
By sucking at 4, it is possible to collect the cloth waste. That is, even if the path for collecting the cloth waste is divided into the cloth waste path 104a and the boss hole 131a, the cloth waste path 104a can be reliably collected.
Further, since the path is divided, even if the cloth waste path on the knife unit 100 side is changed with the base plate 103a as a boundary, for example, according to the retracting direction of the eyelet knife (see Modification 1), the base plate 103a can be used. By changing the mounting position of the boss 133 with respect to, a similar collecting structure can be adopted, and the cloth waste path can be freely set.

In the second embodiment described above, both the flat knife receiver and the step knife receiver can be used as the knife receiver. However, as the cloth cutting knife, the eyelet knife portion is higher. You may make it possible to use what has a level | step difference with a linear female part. In this case, even if the flat knife receiver is used, only the eyelet portion 90 can be formed, that is, only the eyelet button hole 92, the sleep eye hole 94, and the eyelet portion 90 can be freely formed.

A modification of the second embodiment will be described. <Modification 1> Modification 1 will be described with reference to FIGS. 31 and 32. In FIGS. 31 and 32, the same members as those in FIGS. 20 to 22 are designated by the same reference numerals and the description thereof will be omitted. In the knife unit 300 in the modification 1, the knife base member 1
A female base member 303 is used instead of 03. The female base member 303, like the female base member 103,
The base plate 303a is fixed to the bed portion of the sewing machine 200 by the fixing screws 152, 152, and the female support 303b is formed on the front portion of the base plate 303a so as to stand upright.
Further, a block body 303c is provided on the female support body 303b.
The linear female member 102 is fitted on the upper surface thereof, as in the second embodiment. However, the knife support 303b here is the knife support 1
Compared with 03b, the rear side is shorter and is formed to have a width that supports the block body 303c from directly below, and does not support the eyelet knife base 304 described later.

Further, a flat slide portion 303d is provided on the upper surface of the base plate 303a, and the guide groove 30 is provided at the center of the slide portion 303d along the front-rear direction.
3e is provided. On the other hand, an eyelet knife base 304 is provided on the upper surface of the slide portion 303d. Like the second embodiment, the eyelet knife member 101 is fixed to the upper surface of the eyelet knife base 304, and the cloth dust path 101e is formed inside the eyelet knife member 101.
The guide groove 303 is formed on the lower surface of the eyelet knife base 304.
A fitting protrusion 304b that fits into e is provided. This allows the eyelet knife base 304 to move back and forth on the upper surface of the slide portion along the guide groove 303e.

In the eyelet knife base 304, the cloth waste path 3 continuous with the cloth waste path 101e of the eyelet knife member 101.
04a is formed. The cloth waste path 304a is formed in the diagonally rearward and downward direction.
Unlike 4a, the eyelet knife base 304 is formed so as to face obliquely downward in the front of the paper surface of FIG. Eyelet scalpel 101
The cloth waste cut by b is the cloth waste paths 101e, 30.
It passes through 4a, falls into the boss hole 131a, and is discharged to the outside. A cloth dust guard 306 is provided so that the side surface of the eyelet knife base 304 surrounds the edge according to the direction of the cloth waste path 304a, and is fixed to the base plate 303a by setscrews 307 and 307.

The cylinder mounting plate 301 for fixing the air cylinder 310 similar to the air cylinder 110 has a set screw 3 at a position where it does not interfere with the forward and backward movement of the eyelet knife base 304.
It is fixed to the upper surface of the base plate 303a so as to be adjustable back and forth by 02 and 302. Rod 310a
Has a threaded portion 310b that is externally threaded.
Is fixed, and the screw portion 310b is attached to the screw hole formed on the rear surface of the eyelet knife base 304 through the nut 305 by adjusting the front-rear position. Therefore, in the first modification, the eyelet knife base 304 is the rod 3
It is designed to move back and forth according to the appearance of 10a,
When the air cylinder 310 is off and the rod 310a is projecting, it is in an upright state (Fig. 32 (a)), and when the rod 310a is on and the rod 310a is retracted, the eyelet knife base 304 is pulled through the screw portion 310b and the rear Move to. Base 30 for eyelet knife pressed by air cylinder 310
The position in front of 4 is the adjustment screw 11 provided inside the rear part of the block body 303c as in the first embodiment.
5, 115.

The cutting operation performed by the knife unit 300 having the above structure and the flat knife receiver 160 (or the step knife receiver 167) may be substantially the same as (1) to (4) described in the first embodiment. However, the only difference is that the eyelet knife base 304 is retracted by going straight backward. That is, when cutting the eyelet section 90, as shown in FIG. 32 (a), the eyelet knife base 304 is at the front, and the flat knife receiver 160 and the eyelet knife 101b.
And the straight female knife 102b. Step knife receiver 16
If it is 7, it matches only with the eyelet knife 101b. The position of the eyelet knife 101b at this time is the first position. Also,
At the same timing as in the first embodiment, the air is supplied to the joint 1
63, 141, the cloth waste generated by the cutting passes through the cloth waste paths 101e, 304a, is discharged from the side surface of the eyelet knife base 304, and is further sucked by the suction device 134,
Is discharged.

When the straight portion 90 or the sleep eye hole 94 is formed, as shown in FIG. 32 (b), the eyelet knife base 304 is moved backward to a position where it does not interfere with the flat knife receiver 160 (step knife receiver 167). Retract and receive flat knife 160
The cloth is cut by only the (step knife receiver 167) and the linear knife 102b. The position of the eyelet knife 101b at this time is the second position.

Even with the sewing machine provided with the cloth cutting device having the above knife unit 300, the eyelet knife 101b
Since the eyelet knife base 304 to which is fixed is movable back and forth, like the sewing machine 200 having the cloth cutting device 201, if the flat knife receiver 160 is used, the eyelet button hole 92 and the sleep eye hole 94 are provided. Can be formed in any desired length. If the stepped female receiver 167 is used, the eyelet button hole 92 and the sleep eye hole 94 can be formed with arbitrary lengths, and only the eyelet portion 90 can be formed.

<Modification 2> Modification 2 will be described with reference to FIG. In FIG. 33, the same members as those in FIGS. Modification 2
The cloth cutting device 400 is configured upside down from that of the first embodiment, and has a cloth cutting knife 411 on the upper side and a knife receiver on the lower side. On the upper side, the knife receiving drive means 1
A knife mounting base 410 is fixed to the linear motion shaft 40 that constitutes a cloth cutting driving means similar to 70, and a cloth cutting knife 411 is mounted to the knife mounting base 410. On the lower surface of the cloth cutting knife 411, eyelet knife portions 412 formed in a drop shape are formed.
And the linear female portion 413 linearly formed are continuously and integrally formed.

A cloth waste path 410a is formed in the lateral direction inside the female mount 410, and air is sucked in the arrow C direction through a joint 418 to the cloth waste path 410a. There is. A cloth waste chute 416 for collecting the cloth waste is fixed via a screw 417 so as to project to the outer surface of the female mount 410 at the tip of the cloth waste path 410a. The cloth chute 416 is provided with a pipe 414, and a hose 415 is connected to the other end of the pipe 414. Inside the female mount 410, the cloth waste path 4
A cloth waste path 410b is formed so as to be connected to 10a. A cloth waste path 411a that is continuous with the cloth waste path 410b is also formed inside the cloth cutting knife 411.
It is open at the lower surface of 2.

The lower knife receiving unit 420 is constructed by mounting each member on the knife receiving base 403.
The base plate 403a is provided with a knife receiving support body 403b similar to the knife support body 103b and a block body 403c similar to the block body 103c, and has substantially the same shape as the knife base member 103. However, in the second modification, since the cloth waste is not discharged from the bottom of the knife receiving base 403, the difference is that a hole for passing the cloth waste is not provided in the knife receiving base plate 403a.

On the upper surface of the block body 403c, a linear knife receiver 402, which matches the linear knife portion 413 and has a flat upper surface, is fixed. This fixing structure is similar to that of the linear female member 102. In addition, a rectangular parallelepiped recess (not shown) is formed inside the knife receiving support 403b, and an eyelet knife receiving base 404 is fitted into the recess. Eyelet knife receiving base 404
Like the eyelet knife base 104, is attached to the knife receiving support 403b while being rotatable by a support shaft 107 and biased counterclockwise in FIG. 33 by a spring 108. . And the eyelet knife receiving base 4
Similarly to the eyelet knife base 104, the link 04 is pushed by the cylinder pin 114 at the tip of the air cylinder 110 to stand up, and is attached to the cylinder pin 114.
16 and the spring 108 make it fall down.

On the upper surface of the eyelet knife receiving base 404, an eyelet knife receiver 401 having a flat upper surface, which matches the eyelet knife portion 412, is fixed. This fixing structure is similar to that of the eyelet knife member 101. The straight knife receiver 402 and the eyelet knife receiver 401 form a knife receiver. Inside the eyelet knife receiving base 404,
An air vertical hole 404a for passing air is formed.
Further, a side hole (not shown) connected to the air vertical hole 404a is formed on the side surface of the eyelet knife receiving base 404 (the side opposite to the surface seen in FIG. 33), and the air line 4 is formed in this side hole.
06 is connected via a joint (not shown). Inside the eyelet knife receiver 401, continuous with the vertical air hole 404a,
An air vertical hole 401b which is an opening on the upper surface 401a is formed. Therefore, when air is supplied from the air line 406, the air is ejected toward the upper eyelet knife portion 412 through the vertical air holes 404a and 401b. The cloth dust generated by the formation of the eyelet portion 90 is removed by the air jetted from the air vertical hole 401b.
1a, 410b, 410a and further fitting 418
The air sucked from the head moves toward the cloth waste chute 416, passes through the air pipe 414 and the hose 415, and is discharged to the outside of the sewing machine.

In the cutting operation performed by the cloth cutting device 400 having the above structure, the cloth cutting knife 411 moves up and down similarly to the plane knife receiver 160, while the eyelet knife receiver 401 rotates like the eyelet knife member 101. Except for moving and retracting, it is the same as (1) to (4) described in the first embodiment. That is, when cutting the eyelet portion 90 and the straight portion 91 of the eyelet button hole 92, the cloth cutting knife 411 is lowered and the eyelet knife receiver 4 is in the state shown in FIG. 33 (a).
01 and the linear knife receiver 402 match. The position of the eyelet knife receiver 401 at this time is the first position. Further, since cloth dust is generated, the air flows through the air line 406 and the joint 41.
8 and the waste cloth is discharged out of the sewing machine.

When the straight portion 91 or the sleep eye hole 94 is formed, the eyelet knife receiving base 404 is rotated counterclockwise as shown in FIG. The cloth is cut by only the linear knife receiver 402. The position of the eyelet knife receiver 401 at this time is the second position. Even in the case of the sewing machine provided with the cloth cutting device 400 described above, like the sewing machine 200 provided with the cloth cutting device 201, the eyelet button hole 92 and the sleep eye hole 94 can be formed with arbitrary lengths. . Furthermore, the upper surface 401a of the eyelet knife receiver 401 is straighter than the straight knife receiver 4
By providing a step so that it is located higher than the upper surface 402a of 02, the eyelet button hole 92 and the sleep eye hole 94 can be formed with arbitrary lengths, and only the eyelet portion 90 can be formed.

<Modification 3> Modification 3 will be described with reference to FIG. In FIG. 34, the same members as those in FIGS. Modification 3
Female base member 50 in female unit 500 in
3 has a flat base plate 503a, and the base plate 503a
A semi-circular semi-circular plate portion 503b is erected on the upper side. A fulcrum shaft 505 passes through the center of the semi-circular plate portion 503b, and a rotary knife base 504 is attached so as to be rotatably supported by the fulcrum shaft 505. The rotary knife base 504 is a block-shaped member that is formed so as to be bent halfway, and the eyelet knife member 501 is fixed to the rear upper surface and the straight knife member 502 is fixed to the front upper surface with the bending portion 504a as a boundary. Has been done. The fixing structure of these females is the same as that of the first embodiment.

A drop-shaped eyelet knife 501b is formed on the upper edge of the eyelet knife member 501, and the cloth waste path 5 is formed inside thereof.
01a is formed. A straight linear knife 502b is formed on the upper surface of the straight knife member 502. Stoppers 519 and 519 are fixed to the side surface of the rotary knife base 504 via screws 520 and 520, and the eyelet knife member 501 and the straight knife member 502 are positioned rearward by the stoppers 519 and 519, respectively. ing.

The rotary knife base 504 has the cloth path 5
01a, a cloth waste path 504d is formed so as to extend obliquely rearward and downward. Cloth path 504
The cloth waste discharged from d passes through the boss hole 131a in the base plate 503a toward the outside of the sewing machine as in the first embodiment. A cloth dust guard 508 is screwed and fixed on the base plate 503a. Rotating knife base 50
The first triangular cam 504b and the second triangular cam 504c, which are two triangular cams, are provided on the lower surface of 4, while the triangular cams 504b, 504c are provided on the upper surface of the base plate 503a.
A movable cam 517a configured to be movable back and forth is provided at a position where the movable cam 517a can abut.

The air cylinder 110 has a set screw 518,
The cylinder mounting plate 511 is fixed to the base plate 503a at 518, and is fixed by cylinder screws 112 and 112. Rod 110a of air cylinder 110
A rod fixing plate 515 is fixed to the rod fixing plate 515 with a fixing screw 516. The rod fixing plate 515 has a substantially rectangular shape when viewed from the front-rear direction, and a hole (not shown) is formed in the upper part of the right portion (upper side in FIG. 34 (a)) of the rod fixing plate 515 and is fixed to the cylinder mounting plate 511. The stopper shaft 512 is inserted. The stopper 51 is attached to the tip of the stopper shaft 512.
3 is attached. A cam fixing plate 515a extends from the lower part of the right portion so as to face forward.
A cam support portion 517 that is integral with and supports the moving cam 517a is fixed to the cam fixing plate 515a by cam screws 514 and 514.

The operation of the female unit 500 having the above structure will be described. FIG. 34 shows the rod 110a retracted,
The first triangular cam 504b rides on the upper edge of the moving cam 517a, the eyelet female member 501 stands up, and the straight female member 5 moves.
02 is in a tilted state. At this time, the eyelet knife 501b is at the first position, which is the cloth cutting position, and the straight knife 5
02b is located at the second position where the cloth cannot be cut. Therefore, when the knife receiver descends from above in this state, only the eyelet portion 90 is formed.

When the rod 110a projects from this state, the cam fixing plate 515a moves forward as the rod fixing plate 515 moves forward while being guided by the stopper shaft 512, whereby the cam supporting portion 517 and the moving cam 517a.
Moves forward. The moving cam 517a moves away from the first triangular cam 504b due to forward movement, and eventually the second triangular cam 504c.
34, the rotary knife base 504 is moved by the forward force as shown in FIG.
Rotate counterclockwise in (b). At the end, the second triangular cam 504c rides on the moving cam 517a, the eyelet knife member 501 is tilted obliquely, and the straight knife member 502 stands up. At this time, the linear knife 502b is located at the first position which is the cloth cutting position, and the eyelet knife 501b is located at the second position where the cloth cutting is not possible. Therefore, if the knife receiver descends from above in this state, the straight portion 91
A sleep eye hole 94 is formed. Incidentally, this moving cam 51
The forward movement of 7a is stopped when the rod fixing plate 515 contacts the stopper 513. Rod 1 again from this state
When 10a is retracted, the rotary knife base 504 rotates clockwise along with the rearward movement of the moving cam 517a and returns to the state shown in FIG.

In the case of the sewing machine provided with the above knife unit 500, the rotary knife base 504 enables the eyelet knife member 501 and the straight knife member 502 to alternately move between the first position and the second position. Because of the construction, the eyelet button hole 92 and the sleep eye hole 94 can be formed with arbitrary lengths, and only the eyelet portion 90 can be formed.

In each of the second embodiment and its modification, the retracting direction of the knife or knife receiver moving between the first position and the second position is not limited to the front-rear direction but the lateral direction. Good. Further, the specific mechanism for retraction can be changed as appropriate. Further, the upper and lower positional relationships of the knife receiver and the knife may be interchanged.

[0179]

According to the control device of the sewing machine of the first aspect, both the eyelet knife portion and the straight knife portion are based on the control data including the data on the button hole length and the data on the overlock stitch length. Is used to control the eyelet buttonhole so that it can be formed in the workpiece. Therefore, if you move the straight knife part to the rear part of the straight part and sequentially cut the sewn item, you can change the length of the straight part of the eyelet button hole without replacing the knife and knife holder. can do. Also, if the straight knife part is moved to the rear part of the straight hole and the sewn item is cut sequentially, the length of the straight hole can be changed without replacing the knife or knife holder. can do. When bar tacking is formed so as to connect the sewing start point and the sewing end point after forming the hole stitches, by setting the data related to the length of the button hole, the straight part can be sewn with the sewing start point. It is possible to prevent it from extending to the position sandwiched between the end points and prevent defective sewing.

According to the sewing machine control device of the second aspect, the same effect as that of the first aspect can be obtained, and after the eyelet button hole is formed by the eyelet knife portion and the straight knife portion, the straight knife portion is straightened. To the rear portion of the eyelet, based on the data for changing the length of the linear portion of the eyelet buttonhole, if the workpiece is sequentially cut, the linear portion of the eyelet buttonhole, The length of the straight portion can be extended based on the data for changing the length, and the buttonholes corresponding to various specifications can be formed without replacing the knife or the knife receiver.

According to the sewing machine control device of the third aspect, the same effect as that of the first or second aspect can be obtained, and
Since data can be set to change the formation position of the straight hole along the length direction of the overhole stitch, the straight hole can be formed at any position with respect to the overhole stitch, and the straight hole can also be formed. Since the data for changing the length can be set, the length of the linear hole can be changed arbitrarily, and it is possible to form button holes corresponding to various specifications without replacing the knife or knife receiver. Become.

According to the sewing machine control device of the fourth aspect, the same effect as that of any one of the first to third aspects can be obtained, the shape of the cloth cutting knife can be easily specified, and When forming eyelet buttonholes using a knife, it is not cut by the eyelet knife portion and the straight knife portion,
The control device can easily calculate the length of the material to be sewn in the uncut portion and the length to be added by using only the linear knife portion, and the workability of the buttonhole forming work can be improved.

According to the sewing machine control device of the fifth aspect, the same effect as that of any one of the first to fourth aspects can be obtained, and at the same time, the sewing object using both the eyelet knife portion and the straight knife portion. Since it is possible to set selection data to select whether to form eyelet button holes in the sewing machine or to form linear holes in the sewing product only with the straight female part, eyelet button holes or straight hole can be easily formed. It is possible to form a straight hole, and it is not necessary to replace it with a predetermined cloth cutting knife corresponding to the shape of the straight hole when forming the straight hole.

According to the sewing machine control device of the sixth aspect, the same effect as that of any one of the first to fifth aspects can be obtained, and the sewing machine can move up and down when the buttonhole is formed in the sewing object. Since it is possible to set the data regarding the rising height of either the cloth cutting knife or the knife receiver, if this data is set to the same height as the thickness of the sewing object, the cloth cutting knife or The amount of rise of the knife receiver is minimized, and the cycle time for forming buttonholes can be shortened.

According to the sewing machine control device of the seventh aspect, the same effect as that of any one of the first to sixth aspects can be obtained, and since the changing means for changing the content of the control data is provided, By changing the contents, it is possible to form button holes corresponding to various specifications.

According to the eighth aspect of the present invention, among the cloth cutting knives, at least one of the eyelet knife portion and the linear knife portion is cut by the moving means so as to match the knife holder and cut the sewing object. It is possible to move between a possible first position and a second position which does not match the knife receiver. This allows
Various button holes can be formed. For example, when the knife receiver is a type in which the eyelet knife receiving portion and the linear knife receiving portion are formed flat, and only the eyelet knife female portion is moved by the moving means, when the eyelet knife female portion is at the first position,
It is possible to form eyelet buttonholes and to form linear buttonholes (sleeping eyelets) when in the second position. Also,
When only the linear knife portion moves, the eyelet button hole can be formed when the linear knife portion is at the first position, and only the eyelet portion can be formed when the linear knife portion is at the second position, which can be used for a flower hole or the like. Both, if movable, eyelet button holes,
It is possible to form only three types, a sleep eye hole and an eyelet part.
Therefore, various button holes can be formed without replacing the cloth cutting knife.

According to the fifteenth aspect of the present invention, of the knife receiver, by means of the moving means, at least one of the eyelet knife knife receiving portion and the straight knife knife receiving portion can match the cloth cutting knife and cut the workpiece. It is possible to move the first position and the second position that does not match the cloth cutting knife. Thereby, various button holes can be formed. For example, when the cloth cutting knife is a type in which the eyelet knife knife portion and the linear knife knife portion are formed to be substantially flat, and only the eyelet knife knife holder portion moves, when the eyelet knife knife holder portion is at the first position, the eyelet button button A hole can be formed, and a linear button hole (sleeping hole) can be formed when in the second position. Also, when only the straight knife receiving part moves, when the straight knife receiving part is in the first position, eyelet button holes can be formed, and when it is in the second position, only the eyelet part can be formed, which is used for flower holes, etc. it can. If both are movable, three types of eyelet button holes, sleep eye holes, and eyelet portions can be formed. Therefore, various button holes can be formed without replacing the knife receiver.

According to the seventeenth aspect, in addition to the effects of the eighth or fifteenth aspect of the invention, the cloth cutting means can be moved relative to the sewn object without replacing the knife receiver. While making it possible, you will be able to add,
Buttonholes of various lengths can be formed.

[Brief description of drawings]

FIG. 1 is a side view showing a partially broken structure of a sewing machine according to a first embodiment.

FIG. 2 is a front view showing a partially broken structure of the sewing machine according to the first embodiment.

FIG. 3 is a rear view showing the structure of the sewing machine according to the first embodiment.

FIG. 4 is a top view showing the structure of the sewing machine according to the first embodiment.

FIG. 5 is a side view (a) and a front view (b) showing a structure of a cloth cutting knife and a knife receiver.

FIG. 6 is a block diagram showing a control device of the sewing machine.

FIG. 7 is a diagram showing pattern data.

FIG. 8: Female No. Drawing (a) showing the data corresponding to
And (b).

9A and 9B are diagrams showing the shape of a hole stitching seam formed in an eyelet button hole, FIG. 9B showing a data table, and FIG. 9C showing a shape of a hole stitching seam formed in a sleep eye button hole. ).

FIG. 10 is a diagram showing memory switch data.

FIG. 11 is a view showing an operation panel.

FIG. 12 is a flow chart showing the flow of buttonhole stitch forming work.

FIG. 13 is a flowchart showing a flow of memory switch setting.

FIG. 14 is a flowchart showing a flow of data setting.

FIG. 15 is a flowchart showing a flow of a cloth cutting knife operation.

FIG. 16 is a diagram showing a method of calculating a knife drop position.

FIG. 17 is a perspective view showing a structure of a cloth cutting knife (a) and a perspective view showing a structure of a knife receiver (b).

FIG. 18 is a side view showing the main structure of the sewing machine according to the second embodiment in a partially broken state.

FIG. 19 is a front view showing the main structure of the sewing machine according to the second embodiment in a partially broken state.

20 is a plan view from above showing the female unit provided in the sewing machine of FIG. 18. FIG.

21 is a side view showing the female unit of FIG. 20 and an aspirator connected to the female unit, and is shown partially broken. FIG.

22 is a side view showing the operation of the cloth cutting device having the knife unit shown in FIG. 20, (a) showing a state in which the eyelet knife member stands up, and (b) showing a state in which the eyelet knife member falls down. Show.

23 is a side view showing the operation of the cloth cutting device having the knife unit of FIG. 20 and using the step knife receiver as the knife receiver, FIG. 23 (a) shows a state in which the eyelet knife member stands up;
(B) shows a state in which the eyelet knife member is tilted.

FIG. 24 is a diagram for sequentially explaining the manner of forming eyelet button holes during the operation of FIG. 22.

FIG. 25 is a diagram for sequentially explaining a manner of forming a sleep eye hole during the operation of FIG. 22 or FIG. 23.

FIG. 26 is a diagram for sequentially explaining the manner of forming eyelet button holes during the operation of FIG. 23.

27 is a block diagram showing a controller of the sewing machine shown in FIG. 18. FIG.

FIG. 28 is a flowchart showing a flow of cloth cutting operation.

FIG. 29 is a diagram for explaining a method of calculating a knife receiving position.

30 is a diagram schematically showing four cloth cutting patterns in the cloth cutting device of the sewing machine of FIG. 18. FIG.

FIG. 31 is a view showing a female unit as a modified example 1 of the second embodiment, (a) is a plan view from above,
(B) is a side view.

32 is a side view showing the operation of the cloth cutting device having the knife unit shown in FIG. 31, (a) showing a state in which the eyelet knife member is moving forward, and (b) showing a rectilinear knife member retracted. Indicates the status.

FIG. 33 is a view showing a cloth cutting device as a second modification of the second embodiment, in which (a) is a state in which a knife receiver is upright, and (b) is a state in which the knife receiver is tilted and retracted. Indicates.

FIG. 34 is a view showing a female unit as a modified example 3 of the second embodiment, (a) is a plan view from above,
(B) is a side view.

FIG. 35 is a diagram showing conventional pattern data.

36] A female No. It is drawing (a)-(d) which shows the data corresponding to.

[Explanation of symbols]

10 sewing machine 50 Sewing machine controller 52 storage means (RAM) 53 storage means (EEPROM) 59 Change means (operation panel) 60 cloth cutting means 61 cloth cutting knife 61a Eyelet female part 61b Straight female part 62 female receiver 90 Eyelet section 91 Straight section 92 Eyelet buttonhole 93 straight hole 14 Feeding platform (relative moving means) 100 female unit 101 Eyelet female member 101b Eyelet female 101e Cloth path 102 Female member for straight line 102b straight female 103 female base 104 Eyelet knife base 104a Waste cloth path 107 fulcrum axis 108 Spring (moving means) 110 Air cylinder (moving means) 114 cylinder pin 116 links 122 Cloth guard 134 Aspirator 160 flat knife 167 Stepped knife receiver 170 knife receiving drive means (cloth cutting drive means) 180 controller 200 sewing machines 201 cloth cutting device 300 female unit 303 Female base member 304 Eyelet knife base 304a Waste cloth path 400 cloth cutting device 401 Eyelet female receiver 402 Straight female knife 403 Female receiving base 404 Eyelet knife receiving base 410 female mount 411 cloth cutting knife 412 Eyelet female part 413 Straight female part 416 Cloth waste chute 420 female receiving unit 500 female unit 501 Eyelet female member 501a Cloth waste path 501b Eyelet female 502 Straight female member 502b Straight female 503 Female base member 504 Rotating knife base 504b First triangular cam 504c Second triangular cam 504d Cloth path 517a moving cam

Continued front page    F term (reference) 3B150 AA24 BA06 CE03 CE23 CE25                       EE03 EE08 EE15 JA03 LA26                       LA29 LA60 LA73 LB01 LB02                       NA05 NA25 NA28 NA56 NA64                       NB09 NB12 NC03 QA01 QA06                       QA07 QA08

Claims (17)

[Claims] 1. An eyelet button hole formed on a sewing machine for forming a buttonhole in a sewing object and forming a buttonhole stitch around the buttonhole of the sewing object, the eyelet buttonhole having an eyelet section and a straight section. A cloth cutting means having a eyelet knife portion forming a straight line portion, and a straight line knife portion forming the straight line portion, and a cloth cutting means having a knife receiver arranged to face the cloth cutting knife, When cutting the sewn object by moving the scalpel up and down relative to the knife receiver, it is possible to form eyelet button holes on the sewn object by using both the eyelet knife portion and the straight knife portion. A control device for a sewing machine which controls a linear hole in a workpiece with only the linear knife portion, and stores a plurality of control data for forming the buttonhole and the overlock stitch. Storage means for The sewing machine control device includes data relating to the length of the button hole and data relating to the length of the buttonhole stitch, and controls the drive of the cloth cutting means based on the control data. . 2. The sewing machine control device according to claim 1, wherein when the eyelet button hole is formed in the workpiece by using both the eyelet knife portion and the linear knife portion as the control data. In the sewing machine control device, the data for changing the length of the straight line portion of the eyelet button hole is included. 3. The control device for the sewing machine according to claim 1, wherein the control data includes a linear hole when a linear hole is formed in a sewing object with only the linear knife portion. A sewing machine control device including data for changing a hole forming position along a length direction of a boring stitch and data for changing a length of the linear hole. 4. The sewing machine control device according to claim 1, wherein the control data relates to data regarding the length of the eyelet knife portion and the length of the straight knife portion. A sewing machine control device comprising data and data relating to a length between the eyelet knife portion and the straight knife portion. 5. The sewing machine control device according to claim 1, wherein the control data includes both the eyelet knife portion and the straight knife portion for a sewing object. A control device for a sewing machine, comprising selection data for selecting whether to form an eyelet button hole or whether to form a linear hole in a sewn product by using only the linear knife portion. 6. The sewing machine control device according to claim 1, wherein the control data includes a cloth cutting knife that moves up and down when a button hole is formed in a workpiece. Alternatively, the control device for the sewing machine includes data relating to a rising height of one of the knife receivers. 7. The control device for a sewing machine according to claim 1, further comprising a changing unit that changes the content of the control data. 8. An eyelet forming a eyelet portion of a eyelet button hole having a eyelet portion and a straight portion, the eyelet portion being provided on a sewing machine for forming a button hole on a sewing object and forming a buttonhole stitch around the buttonhole. A cloth cutting knife having a knife portion and a straight knife portion forming the straight line portion, an eyelet knife receiving portion which is arranged vertically opposed to the cloth cutting knife and matches the eyelet knife portion, and the straight line A cloth cutting means including a knife receiver having a knife portion and a straight knife receiving portion that matches the knife portion; and cloth cutting driving means for driving one of the cloth cutting knife and the knife receiver in the up-down direction so that the knife receiver comes into contact with and separates from the cloth cutting knife. The cloth cutting means is a cloth cutting device for a sewing machine that cuts a material to be sewn and forms a button hole when a cloth cutting knife and a knife receiver are in contact with each other, and the eyelet knife portion of the cloth cutting knife is used. At least the straight female portion One is configured to be movable so as to have a first position that matches the knife receiver and is capable of cutting a workpiece, and a second position that does not match the knife receiver. The eyelet knife portion and the straight knife A cloth cutting device for a sewing machine, comprising: a moving unit that moves between a first position and a second position for a unit that takes a first position and a second position. 9. The cloth cutting device for a sewing machine according to claim 8, wherein the eyelet knife receiving portion and the linear knife receiving portion are formed on substantially the same horizontal plane as the knife receiving portion, and the eyelet knife is The sewing machine is characterized in that both the receiving portion and the linear knife receiving portion are provided with steps so that they are formed on different horizontal planes, and that either one is attached and used. Cloth cutting device. 10. The cloth cutting device for a sewing machine according to claim 9, further comprising storage means for storing a plurality of control data for forming buttonholes and overlock stitches, wherein the control data includes a flat knife receiver. Of eyelet button holes with a cloth cutting knife, a flat knife receiver or a step knife receiver, and a linear hole with only a straight knife portion of the cloth knife, and a step knife receiver and a cloth knife. Includes hole type selection data for selecting one of eyelet button hole formation by the above and eyelet part formation by only the step knife receiver and only the eyelet female part, and the hole selected by the hole type selection data is formed. As described above, the cloth cutting device for a sewing machine, comprising: a control means for controlling and driving the cloth cutting driving means and the moving means at a predetermined timing. 11. The sewing machine cloth cutting device according to claim 8, wherein the eyelet knife portion is fixed to a eyelet knife base, and the eyelet knife base is rotated to move the eyelet knife to the first position. A cloth cutting device for a sewing machine, which moves between the second position and the second position. 12. The sewing machine according to claim 8, wherein the eyelet knife portion is fixed to the eyelet knife base, and the eyelet knife base is slid linearly to move the eyelet knife. A cloth cutting device for a sewing machine, which moves between one position and the second position. 13. The sewing machine according to claim 8, wherein the eyelet knife portion and the straight knife portion are both fixed to the cloth cutting knife base, and the cloth cutting knife base rotates. The cloth cutting device for a sewing machine, wherein the eyelet knife portion and the straight knife portion alternately move between the first position and the second position. 14. The cloth cutting device for a sewing machine according to claim 8, wherein the eyelet knife portion is fixed to a eyelet knife base, and the first position and the second position are associated with movement of the eyelet knife base. And the eyelet knife portion and the eyelet knife base are formed from the inside of the eyelet knife portion and the eyelet knife base toward the outside so that the eyelet knife portion and the eyelet knife receiving portion are aligned with each other to form the eyelet portion on the workpiece. A cloth waste path for collecting eyelet-shaped cloth waste is formed in a direction that does not prevent the movement of the eyelet knife portion, and the cloth waste that has passed through the cloth waste path is connected to the suction device, and the cloth waste path A cloth cutting device for a sewing machine, which is configured to be discharged into a pipe that is not connected to the sewing machine. 15. An eyelet forming a eyelet portion of a eyelet button hole having a eyelet portion and a straight portion, the eyelet portion being provided on a sewing machine for forming a button hole on a material to be sewn and forming a buttonhole stitch around the buttonhole. A cloth cutting knife having a knife portion and a straight knife portion forming the straight line portion, an eyelet knife receiving portion which is arranged vertically opposed to the cloth cutting knife and matches the eyelet knife portion, and the straight line A cloth cutting means including a knife receiver having a knife portion and a linear knife receiving portion that matches the knife portion; The cloth cutting means is a cloth cutting device of a sewing machine that cuts a material to be sewn to form a button hole when a cloth cutting knife and a knife receiver are in contact with each other, and the eyelet knife receiving portion of the knife receiver is provided. The number of linear knife receiving parts is small At least one is configured to be movable so as to have a first position in which the material to be cut can be cut in conformity with the cloth cutting knife and a second position in which the cloth cutting knife does not match, and the eyelet knife receiver A cloth cutting device for a sewing machine, comprising: a moving unit that moves between a first position and a second position of a unit and the linear knife receiving unit that take a first position and a second position. 16. The sewing machine according to claim 15, wherein the eyelet knife receiving portion is fixed to the eyelet knife receiving base, and the eyelet knife receiving base is rotated to rotate the eyelet knife receiving portion. A cloth cutting device for a sewing machine, which moves between one position and the second position. 17. The sewing machine cloth cutting device according to claim 8 or 15, wherein said cloth cutting means is parallel to a straight line portion of said eyelet button hole formed in the sewing object with respect to the sewing object. A cloth cutting device for a sewing machine, characterized in that it is provided with a relative moving means capable of relatively moving in a direction.