JP3942469B2 - Sewing machine cloth cutting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention provides a button hole in a sewing product.Sewing machine cloth cutting equipmentAbout.
[0002]
[Prior art]
In general, a buttonhole overlock sewing machine is known as a sewing machine that performs overlock stitching around a buttonhole formed in a cloth (a sewing object). This buttonhole sewing machine is provided with a knife and a knife receiver facing each other in the vicinity of the sewing needle.
As button holes, eyelet holes (also referred to as eyelet button holes) formed by connecting a drop-like hole (eyelet part) and a straight hole (straight part), and a straight hole (straight part) There is a sleepy eye hole formed only from.
[0003]
The eyelet for forming the eyelet hole has, for example, a shape in which a drop-like blade that forms the eyelet portion and a linear blade that forms the straight portion are connected to each other. Is provided with a linear blade forming a linear portion. Then, with the cloth placed on the knife receiver, the knife is driven downward and pressed against the cloth and the knife receiver to form a button hole.
In such a buttonhole sewing machine, a plurality of pattern data are stored for the size and shape of buttonhole sewing that can be formed, and predetermined buttonhole sewing is performed by calling one of them on the operation panel. .
[0004]
FIG. 35 shows a table of conventional pattern data when buttonhole sewing is performed, and nine types of pattern data having data items 1 to 7 can be stored.
Data item 1 sets the shape of the knife that forms the eyelet portion of the eyelet hole. As shown in FIG. 36 (a), the size of the eyelet part E is defined by the horizontal width ew and the vertical length el, and combinations of these ew and el are stored in advance as a table as shown in FIG. 36 (b). . In the data item 1, one is selected from the numbers 1 to 5 when forming the eyelet hole, and the number 0 is selected when forming the sleepy eye hole.
[0005]
Data items 2 to 6 are data relating to the number of stitches and the length of each part constituting the eyelet hole as shown in FIG. That is, as shown in the table of FIG. 36 (d), the data item 2 is the drilling length (ml), the data item 3 is the number of straight line needles (ln), and the data item 4 is the number of eyelet needles (en). Data item 5 is a straight female space (ls) and data item 6 is a female eye space (es). The data item 7 is used to select a first knife for performing cloth cutting before overlock sewing and a post knife for performing cloth cutting after overlock sewing.
[0006]
[Problems to be solved by the invention]
By the way, since the button hole is required to have a different shape for each type and design of the clothes, it is basically necessary to exchange the knife and the female receptacle when forming the button holes having different shapes. Therefore, even when only the length of the straight portion of the button hole is changed, it is necessary to use a knife and a knife receiver corresponding to this, and it takes time to replace these knife and knife receiver.
In addition, buttonhole sewing machines may be used to form holes other than button holes, such as flower holes formed on the collar of suits. In both cases, the knife and the knife receiver have to be exchanged in the same manner as described above in order to change the length and type of the button hole.
[0007]
  An object of the present invention is to consider the above-described problems, and can form button holes of various lengths and types without changing the cloth cutting knife and the knife receiver.Sewing machine cloth cutting equipmentIs to provide.
[0023]
[Means for Solving the Problems]
  In order to solve the above problems, the claims1As shown in FIGS. 18 to 24, the described invention is provided in a sewing machine (200) that forms a button hole in a sewing product and forms a seam around the button hole, and has a eyelet part (90). The cloth cutting which has the eyelet female part (eyelet female 101b) which forms the said eyelet part of the eyelet button hole (92) which consists of a straight part (91), and the straight female part (straight knife 102b) which forms the said linear part A scalpel, an eyelet female receiving part (160b) that is disposed vertically opposite to the cloth cutting scalpel and matches the eyelet female part, and a linear female receiving part (160c) that matches the straight female part Cloth cutting means provided with a knife receiver (planar knife receiver 160 or step knife receiver 167), and cloth cutting drive means (female receiver driver) for driving one up and down so that the cloth cutting knife and the knife receiver come in contact with and apart from each other. Means 170), and the cloth cutting means is a sewing machine cloth cutting device (201) for cutting a workpiece and forming a button hole when the cloth cutting knife and the knife receiver come into contact with each other and match, At least one of the eyelet knife portion and the linear knife portion of the cloth cutting knife takes a first position that matches the knife receiver and can cut the sewing product, and a second position that does not match the knife receiver. A moving means (air cylinder 110) that moves between the first position and the second position of the eyelet knife section and the linear knife section that takes the first position and the second position. , Spring 108).
[0024]
  Claim1In the cloth cutting knife, at least one of the eyelet knife part and the linear knife part is matched with the knife receiver by the moving means, and the first position is capable of cutting the sewing product. The second position that does not match the knife receiver can be moved. Thereby, various button holes can be formed. For example, when the knife receiver is a type in which the eyelet knife receiving portion and the straight knife receiving portion are formed flat and only the eyelet knife portion moves by the moving means, when the eyelet knife portion is in the first position, An eyelet button hole is formed, and when it is in the second position, a straight button hole (sleep eye hole) can be formed. In addition, when only the straight knife part moves, a button eye button hole can be formed when the straight knife part is in the first position, and only the eyelet part can be formed when it is in the second position. it can. If both are movable, three types of eyelet buttonholes, sleepy eyeholes, and eyelet portions can be formed. Therefore, various button holes can be formed without replacing the cloth cutting knife.
[0025]
  And claims10As described above, the cloth cutting means can be moved relative to the sewing product in a direction parallel to the straight portion of the eyelet button hole formed in the sewing product (for example, a feed base). 14), the claim1In addition to the effects of the above, it is possible to cut and add button holes of various lengths while moving the cloth cutting means relative to the workpiece without changing the cloth cutting knife. Can be formed.
[0026]
  Claim2The invention described in claim 1122 and 23, for example, as shown in FIG. 22 and FIG. 23, as a knife receiver, a flat knife receptacle in which a piglet knife receptacle portion and a linear knife receptacle portion are formed on substantially the same horizontal plane ( 160) and a stepped female receiver (167) provided with a step so that the eyelet female receiving portion and the linear female receiving portion are formed on different horizontal planes, and either one is attached. It is characterized by using.
[0027]
  Claim2According to the invention described in (2), both the flat knife receiver and the step knife receiver can be attached as the knife receiver. Thereby, the variation which can be selected increases. For example, even if only the eyelet knife part can be moved, if a stepped knife receiving part having a step so that the eyelet knife receiving part is closer to the knife side can be formed, only the eyelet part can be formed. Three types of holes, straight portions, and eyelet portions can be formed. On the other hand, even if only the straight knife portion can be moved, if a step knife receptacle having a step so that the straight knife receiving portion is closer to the knife side is used, only the eyelet button hole, the straight portion, and the eyelet portion 3 Types can be formed. If it is not necessary to form only the eyelet part, a flat knife receiver that can form the eyelet buttonhole more efficiently than the step knife receiver may be used.
[0028]
  Claim3The invention described in claim 12The sewing machine cloth cutting device according to claim 1, further comprising storage means (RAM 52) for storing a plurality of control data for forming buttonholes and hole stitches, for example, as shown in FIG. Formation of eyelet button hole by flat knife receiver and cloth cutting knife, formation of straight hole by either flat knife holder or step knife holder and straight knife part of cloth cutting knife, step knife holder and cloth Hole type selection data (data item 10) for selecting either the formation of the eyelet button hole by the cutting knife or the formation of the eyelet part by the step knife receiver and only the eyelet knife part is included. Control means (CPU 54) for controlling and driving the cloth cutting driving means and the moving means at a predetermined timing so as to form a hole selected by data is provided.
[0029]
  Claim3According to the invention described in the above, the eyelet button by the flat knife receiver, the eyelet knife section of the cloth cutting knife and the straight knife section can be used for the hole type selection data by using both the flat knife holder and the step knife holder. Formation of a hole, formation of a straight hole formed by either a flat knife receiver or a step knife receiver, and a straight knife part alone, and a step knife holder, a dovetail knife part of a cloth cutting knife and a straight knife part By selecting either the formation of the eyelet button hole or the formation of only the eyelet portion by the step knife receiver and only the eyelet knife portion, the cloth cutting drive means and the moving means are controlled under the control of the control means. A desired hole is formed.
[0030]
  Claim1In the sewing machine cloth cutting apparatus according to claim 1, the movement by the moving means is specifically claimed.4-6The configuration is as follows. That is, the claim4The invention described in claim 11The eyelet knife section is fixed to the eyelet knife base (104), and the eyelet knife base is rotated to rotate the first position and the second position. It is characterized by moving between. Claims5The invention described in claim 1131 and 32, for example, as shown in FIG. 31 and FIG. 32, the eyelet knife part (eyelet knife 101b) is fixed to the eyelet knife base (304), and the eyelet knife base is It moves between said 1st position and said 2nd position by slidingly moving linearly, It is characterized by the above-mentioned.
[0031]
  And claims6The invention described in claim 1134. For example, as shown in FIG. 34, the eyelet knife part (eyelet knife 501b) and the straight knife part (straight knife 502b) are both cloth cutter knife bases (rotating knife bases 504). When the cloth cutting knife base is rotated, the eyelet knife part and the linear knife part alternately move between the first position and the second position.
[0032]
  Claim7The invention described in claim 11The sewing machine cloth cutting device according to claim 1, wherein the eyelet knife section is fixed to the eyelet knife base (104) and moves between a first position and a second position as the eyelet knife base moves. The eyelet-shaped cloth waste produced by forming the eyelet part on the sewing product by matching the eyelet knife part and the eyelet knife receiving part from the inside to the outside of the eyelet knife part and the eyelet knife base The cloth waste path (101e, 104a) for collecting the waste is formed in a direction that does not prevent the movement of the eyelet knife part, and the cloth waste passing through the cloth waste path is connected to the suction device (134), and It is comprised so that it may discharge | emit in the pipe (133) which is not connected to the cloth waste path | route.
[0033]
  By forming the eyelet part, cloth waste is always generated, and it has been collected from a conventional route that is connected to the eyelet knife part, but the eyelet knife part is configured to move between the first position and the second position. If so, it is practically important what route to collect. Claim7According to the invention described in the above, the cloth waste path for collecting the cloth waste generated when forming the eyelet part is external to the outside of the eyelet knife part and the eyelet knife base in a direction that does not prevent the movement of the eyelet knife part. Therefore, the cloth waste can be collected on a course that does not interfere with the movement of the eyelet knife portion. In addition, the cloth waste discharged from the cloth waste path is connected to the suction device (134) and is discharged into the pipe (133) not connected to the cloth waste path, so that suction is reliably performed. Is done. Also, the cloth waste path and the pipe are not connected, that is, the path for collecting the cloth waste is divided in the middle, so that the knife can be cut depending on the movement direction of the eyelet knife section, etc. Only the cloth waste path on the side can be changed, and the degree of freedom in designing the cloth waste path is high.
[0034]
  Claim8As shown in FIG. 33, for example, the invention described in FIG. 33 is provided in a sewing machine that forms a button hole in a sewing product and forms a seam around the button hole. And a cloth cutting knife (411) having a eyelet female part (412) that forms the eyelet part of the eyelet button hole (92), and a straight female part (413) that forms the straight part, and the cloth An eyelet knife receiving part (eyelet knife receiver 401) that is disposed vertically opposite to the cutting knife and matches the eyelet knife part, and a line knife receiver (linear knife receiver 402) that matches the line knife part. A cloth cutting means having a knife receiver, and a cloth cutting driving means for driving one of the cloth cutting knife and one of the knife holders up and down so that the knife receiver comes into contact with and separates from the cloth cutting knife. The female receptacle touched and matched A sewing machine cloth cutting device (400) for cutting a material to be sewn and forming a button hole, wherein at least one of the eyelet knife receiving part and the linear knife receiving part of the knife receiver includes the cloth cutting knife It is configured to be movable so as to take a first position that matches and can cut the workpiece, and a second position that does not match the cloth cutting knife, and the first of the eyelet knife receiving portion and the straight knife receiving portion. About what takes 1 position and 2nd position, the moving means (the air cylinder 110, the spring 108) which moves between 1st position and 2nd position is provided, It is characterized by the above-mentioned.
[0035]
  Claim8According to the invention described in the above, at least one of the eyelet knife receiving portion and the straight knife receiving portion is matched with the cloth cutting knife by the moving means among the knife receivers, and a first position capable of cutting the workpiece. A second position that does not match the cloth cutting knife can be moved. Thereby, various button holes can be formed. For example, if the cloth cutting knife is a type in which the eyelet knife part and the straight knife part are formed almost flat and only the eyelet knife receiving part moves, the eyelet button is displayed when the eyelet knife receiving part is in the first position. A hole is formed, and when it is in the second position, a straight button hole (sleeping hole) can be formed. In addition, when only the straight knife receiving part moves, the eyelet button hole can be formed when the linear knife receiving part is at the first position, and only the eyelet part can be formed when the linear knife receiving part is at the second position. it can. If both are movable, three types of eyelet buttonholes, sleepy eyeholes, and eyelet portions can be formed. Therefore, various button holes can be formed without exchanging the knife receiver.
[0036]
  And claims10As described above, the cloth cutting means can be moved relative to the sewing product in a direction parallel to the straight portion of the eyelet button hole formed in the sewing product (for example, a feed base). 14), it is possible to cut the cloth cutting means while moving the cloth cutting means relative to the sewing object without changing the knife receiver. Can be formed. Claims10In this case, the entire cloth cutting means may be moved by the relative moving means, or the article to be sewn may be moved.
[0037]
  Claim1And claims8In this case, either the cloth cutting knife or the knife receiver may be on the top.
[0038]
  Claim8In the sewing machine cloth cutting apparatus according to claim 1, the movement by the moving means is, for example,9As described in the invention, the eyelet knife receiving portion is fixed to the eyelet knife receiving base (404), and the eyelet knife receiving base is rotated to turn the first position and the second position. You may comprise so that it may move between.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
Hereinafter, a case where the control device of the 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 an over stitching around the button hole. As the button hole, for example, as shown in FIG. 9 (a), an eyelet hole 92 (hereinafter referred to as the eyelet hole 92) formed by connecting a drop-like hole (eyelet part 90) and a straight hole (straight part 91). 9) and a sleepy eye hole 94 formed from only the straight hole 93, as shown in FIG. 1 shows a state in which the cloth cutting knife 61 is lowered onto the knife receiver 62, and FIGS. 2 and 3 show a state in which the cloth cutting knife 61 is kept at the origin position.
[0040]
The sewing machine 10 includes a bed portion 11 on which an article to be sewn is placed on the upper surface side, a pedestal portion 12 in a state of rising upward from the bed portion 11, and a longitudinal direction from the pedestal portion 12 onto the bed portion 11 in the longitudinal direction. The arm part 13 extended along, the feed base 14 for moving the sewing object in the horizontal plane, the presser foot 16 for pressing the cloth on the upper surface of the feed base 14, and the control device 50 for controlling the operation of the sewing machine 10 (see FIG. 6) , A cloth cutting means 60 (see FIG. 5) for forming a button hole, a cloth cutting knife driving means 20 for moving the cloth cutting means 60 up and down, and the like. Then, the cloth cutting knife 61 descends and presses the cloth and knife receiver 62 with the cloth placed on the knife receiver 62 under the control of the cloth cutting knife driving means 20, thereby forming a button hole. It has a structure.
[0041]
First, the cloth cutting means 60 will be described with reference to FIG.
As shown in FIG. 5 (a), the cloth cutting means 60 includes a cloth cutting knife 61 and a knife receiver 62 arranged to face the lower side of the cloth cutting knife 61. The cloth cutting knife 61 shown in FIG. 5 is a so-called multiple knife in which the eyelet knife part 61a forming the eyelet part 90 and the straight knife part 61b forming the straight line part 91 do not exist on the same height. In the sewing machine shown in the present embodiment, not only the plural times of scalpels but also illustration is omitted, but a portion forming the eyelet portion 90 and a portion forming the straight portion 91 are present at substantially the same height. A standard knife or a knife having only a straight blade for forming the sleepy eye hole 94 is also used.
[0042]
The cloth cutting knife 61 is constituted by the eyelet knife part 61a and the straight knife part 61b as described above, and the linear knife part 61b is fixed to the eyelet knife part 61a by the screw 61c.
The straight knife 61b protrudes downward from the eyelet knife 61a, that is, in the direction of the knife receiver 62 disposed to face the blade, and the blade part is an oblique shape in which one end on the eyelet knife 61a side protrudes from the other end. It has become.
[0043]
The knife receiver 62 has a groove 62a into which the linear knife 61b can be inserted on the side facing the linear knife 61b (see FIG. 5B), and on the side facing the piglet knife 61a, It has a flat part 62b that comes into contact with the part 61a. That is, the depth of the groove 62a is made deeper than the length from the tip of the blade of the straight knife 61b to the tip of the blade of the knife 61a so that the eyelet 61a and the flat portion 62b can come into contact with each other. is there.
Note that a gap 61d is provided between the straight knife 61b and the eyelet 61a, so that the portion not cut between the straight button 91 and the eyelet 90 (hereinafter referred to as “the eyelet 90”). This is called “uncut part”.
[0044]
When the cloth cutting knife 61 having such a structure is lowered, the control device 50 controls the driving of the cloth cutting knife driving means 20 to be described later, whereby the cloth is cut only by the straight knife 61b. The position of the scalpel (hereinafter referred to as “straight line section cutting position”) and the position of the scalpel where the cloth is to be cut by both the straight scalpel section 61b and the eyelet knife section 61a (hereinafter referred to as “eyelet section cutting”). It has a structure that can stop the knife at both positions.
[0045]
Note that the length of the straight knife 61b is equal to or shorter than the shortest of the straight portions 91 of the eyelet holes 92 to be formed. Further, the eyelet knife part 61a may have a substantially drop-like shape that cuts only the eyelet part, or may have a shape with a slight linear part downward from the lower end part of the eyelet.
Further, as described above, since the straight knife 61b is fixed to the eyelet knife 61a with the screw 61c, the straight knife 61b can be attached to and detached from the eyelet knife 61a. When forming the eyelet hole 92 having a different shape only in length, the straight knife portion 61b is replaced instead of extending the straight portion 91 by lowering the straight knife portion 61b multiple times with respect to the cloth as will be described later. It is also possible to do this.
[0046]
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 is roughly composed of a cloth cutting motor 21 that is a pulse motor, a ball screw 24, a link arm 31, a drive shaft 35, a drive gear 39, and a linear motion shaft 40. ing.
The 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 engaging ball screw gear 23 via the motor gear 22. The ball screw gear 23 is attached to a ball screw 24 provided in a vertical direction so as to be rotatable with respect to the sewing machine 10. Accordingly, the ball screw 24 is rotated via the ball screw gear 23 by the driving force of the cloth cutting motor 21.
A 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.
[0047]
Two link arms 31 are provided so as to sandwich both side surfaces of the housing 28 (only one in FIG. 3), and one end of each is rotatably attached to both side surfaces of the housing 28, and the other end is a link shaft 32b. Thus, the lever 34 is bifurcated and fixed to one end of the lever 34 so as to be rotatable.
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 through the link arm 31 and rotates so that one end side (the link arm 31 side) is lowered with the drive shaft 35 as a fulcrum, the drive shaft 35 is rotated by the lever 34. It has become.
A drive gear 39 is fixed to the other end of the drive shaft 35. As shown in FIG. 2, the drive gear 39 meshes with a rack 41 formed at the top of the linear motion shaft 40, and rotates together with the drive shaft 35 to move the linear motion shaft 40 up and down. ing.
[0048]
The linear motion shaft 40 is housed in a substantially cylindrical linear motion metal 42 cut out on the drive gear 39 side, and the length of the linear motion metal 42 provided at two locations on the inner surface of the linear motion metal 42. The convex portions 44 provided at two places in the circumferential direction of the outer surface of the linear motion shaft 40 are movably fitted along the groove portion 43 in the groove portion 43 extending in parallel with the direction, so that it does not rotate left and right. It is slidable.
A knife mounting base 63 is provided at the lower end of the linear motion shaft 40, and a cloth cutting knife 61 is attached to the knife mounting base 63. A knife receiver 62 is mounted on a receiving base 64 provided in the bed portion 11 directly below the cloth cutting knife 61.
[0049]
Next, the operation of the cloth cutting knife driving means 20 will be described.
When the cloth cutting motor 21 is operated, the ball screw 24 is rotated via the motor gear 22 and the ball screw gear 23, and the ball screw nut 27 and the housing 28 are moved down on the ball screw 24. As a result, the two link arms 31 connected to the housing 28 are also lowered to push down one end of the lever 34 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. 2, and the linear motion shaft 40 having the rack 41 engaged with the drive gear 39 is lowered, whereby the cloth The cutting knife 61 descends from the raised position to the straight line cutting position or the eyelet cutting position, and cuts the workpiece on the knife receiver 62.
[0050]
After the cutting, the cloth cutting motor 21 is reversely rotated 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 counterclockwise in FIG. Since 39 rotates clockwise in FIG. 2, the linear motion shaft 40 is raised and the cloth cutting knife 61 is separated from the workpiece.
[0051]
Next, the sewing machine control device 50 will be described.
As shown in FIG. 6, the control device 50 is roughly configured by drive circuits such as a ROM 51, a RAM 52, an EEPROM 53, a CPU 54, an interface 55, and a spindle motor drive circuit 56 a, and the control device 50 includes various motors such as a spindle motor 70. A start switch 57, a presser switch 58, an operation panel 59 (see FIG. 11) and the like are connected.
The ROM 51 is written with a control program and control data necessary for forming buttonholes and hole stitches.
[0052]
The RAM 52 (storage means) stores a plurality of pattern data, and stores one data selected from the data via the operation panel 59. Further, when the value of the pattern data is changed, the value after the change is stored. A method for selecting these data and a method for changing the data contents will be described later. Further, the RAM 52 also functions as a memory area that is temporarily used during various processes during sewing. Further, stitch data generated from the pattern data, a plurality of scalpel dropping positions to be described later, and the like are also 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 value after the change is also stored.
[0053]
As the pattern data, there are, for example, nine pattern data as shown in FIG. 7, and specific values corresponding to the data items 1 to 10 as shown in the pattern data 1 are set in each pattern data. Has been.
Data item 1 sets the type of knife that forms the button hole. As shown in FIG. 8A, the shape of the eyelet knife 61a is defined by the width ew and the length el, the entire length of the cloth cutting knife 61 is defined by ma, and the length of the straight knife 61b is mb. The length of the gap 61d between the eyelet knife 61a and the straight knife 61b is defined by mc, and these combinations are stored in advance in the memory switch data as a table as shown in FIG. 8B. ing.
[0054]
In data item 1, female no. No. 0 to 5 are so-called standard knife, that is, a knife (not shown) in which a straight knife part and an eyelet knife part are integrated is set. 6 to 10 are provided with a so-called multiple knife, that is, a gap 61d between the straight knife 61b and the eyelet knife 61a. As will be described later, the cloth 61 is used for cutting the uncut portion. On the other hand, a knife that needs to be lowered a plurality of times is set. Note that female No. 0 corresponds to a knife having only a straight blade for forming the sleep eye hole 94.
The data items 2 to 6 are data relating to the number of stitches and the length of each part constituting the eyelet stitched seam shown in FIG. That is, as shown in FIG. 9B, the data item 2 is the drilling length (ml), the data item 3 is the number of straight line needles (ln), the data item 4 is the number of eyelet needles (en), and the data item 5 is a straight female space (ls), and data item 6 is an eyelet female space (es).
[0055]
The data item 7 is used to select a first knife for performing cloth cutting before overlock sewing and a post knife for performing cloth cutting after overlock sewing.
The data item 8 is a cut length correction (lc) for changing (correcting) the length of the straight line portion 91, and the data item 9 is a straight line when forming a sleeping hole seam shown in FIG. Sleeper offset amount (cc) for offsetting the formation position of the punctiform hole 93 from the upper part of the sleeper hole seam, the data item 10 is a cloth cutting knife 61 having an eyelet knife part 61a and a linear knife part 61b. Is the sleepy eye selection (ss) selected when the sleepy eye hole 94 is formed in the cloth by lowering the straight line 91 to the cutting position.
[0056]
Note that ml corresponds to data relating to the length of the stitched seam of the present invention, and lc represents data for changing the length of the straight portion 91 of the eyelet hole 92 of the present invention and the straight hole of the sleepy eye hole 94. Corresponds to the data for changing the length of the button 93, ml-lc corresponds to the data relating to the length of the button hole of the present invention, and cc indicates the formation position of the straight hole 93 of the present invention. Corresponding to data for changing along the length direction, ma corresponds to data relating to the length of the eyelet knife portion 61a of the present invention, and mb corresponds to data relating to the length of the linear knife portion 61b of the present invention. , Mc corresponds to data relating to the length between the eyelet knife part 61a and the straight knife part 61b of the present invention, and ss is applied to the sewing product using both the eyelet knife part 61a and the linear knife part 61b of the present invention. The eyelet button hole 92 is formed or There corresponds to the selection data for selecting whether to form a straight hole 93 in only the workpiece straight female portion 61b.
[0057]
As the memory switch data, for example, as shown in FIG. 1 to 36 are set, and in each memory switch, values corresponding to items described in the “contents of memory switch” column are set as shown in the “set value” column. For example, memory switch No. 1 includes female no. It is input that the setting value for the eyelet width (ew) of 1 is 2.1 mm. 13 includes female no. It is input that the set value for the total knife length (ma) of 6 is 18 mm.
[0058]
The CPU 54 controls a series of processing related to buttonhole stitching according to the control program and control data in 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, receives input signals input via the operation panel 59, and selects and changes various settings. It is like that. The operator can select each data shown in FIGS. 7 and 10 and change the selected data via the operation panel 59.
[0059]
Further, the CPU 54 is connected to the spindle motor drive circuit 56a via the interface 55, and drives and controls the rotation of the spindle motor 70. The main shaft motor 70 is a motor that drives an upper shaft that drives the sewing needle up and down and a looper mechanism that forms a seam in cooperation with the sewing needle.
The CPU 54 is connected to the X-axis motor drive circuit 56b via the interface 55, and is connected to the Y-axis motor drive circuit 56c via the interface 55, and drives and controls the X-axis motor 71 and the Y-axis motor 72. However, the feed base 14 is driven in a predetermined direction.
The CPU 54 is connected to the turning motor drive circuit 56d via the interface 55, and controls and drives the turning motor 73. The turning motor 73 rotates the sewing needle and the looper, and a radial seam is formed around the eyelet hole 92 and the like.
[0060]
The CPU 54 is connected to the cloth cutting knife motor driving circuit 56e via the interface 55, and controls and drives the cloth cutting knife motor 74.
The CPU 54 is connected to the start switch 57 via the interface 55. When a start signal is input from the start switch 57, the CPU 54 drives the spindle motor 70 and the like at a predetermined timing, and performs buttonhole sewing and cloth cutting processing. Make it.
Further, the CPU 54 is connected to the presser switch 58 via the interface 55. When an activation signal is input from the presser switch 58, the CPU 54 drives the presser foot cylinder driving electromagnetic valve 75a connected to the presser foot cylinder 75 at a predetermined timing. The presser foot 16 is moved up and down.
In addition, the CPU 54, via the interface 55, detects an X-axis origin sensor 71a and a Y-axis origin sensor 72a for detecting the origin positions of the X-axis motor 71, the Y-axis motor 72, the turning motor 73, and the cloth cutting knife motor 74. These are connected to the turning origin sensor 73a and the cloth cutting knife origin sensor 74a and correspond to a signal indicating whether or not each of these motors has returned to the origin position, and various controls are performed based on this signal.
[0061]
As shown in FIG. Display unit 59a, pattern no. A +/− key 59b, a data item display section 59c, a data item +/− key 59d, a data display section 59e, a data +/− key 59f, a data setting key 59g, and a preparation key 59h are included.
Pattern No. The display unit 59a displays the currently selected pattern No. Is displayed ("1" in FIG. 11). Different pattern data can be selected by changing the numbers one by one within the range of 1 to 9 with the +/- key 59b.
[0062]
The data item display portion 59c is a pattern number. The data item in the pattern data selected by the display unit 59a is displayed ("2" in FIG. 11), and the number is changed one by one within 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 in the data item display portion 59c, a number set in advance for the data item is displayed on the data display portion 59e. The value can be changed by increasing / decreasing the number on the data display portion 59e by a predetermined interval within a predetermined range by using the data +/− key 59f.
The data setting key 59g is a switch operated when performing data setting work. That is, the data value can be changed by pressing the data setting key 59g. Also, 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 enabling preparation of a boring operation and creating stitch data corresponding to a data value selected or reset after the setting operation is completed. 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.
[0063]
Next, the flow of buttonhole stitch formation work will be described using the flowchart of FIG.
First, when the main key (not shown) of the sewing machine is turned on, if the preparation key 59h is also turned on at the same time, that is, if Yes in step S100, the process proceeds to step S101 to set a memory switch to be described later. .
If No in step S100, or after setting the memory switch data in step S101, the process proceeds to step S102.
[0064]
In step S102, the pattern No. Whether or not the +/− key 59b is operated is monitored, and if it is turned on, that is, if Yes, the process proceeds to step S103, where the pattern No. Update.
In the case of No in step S102 or the pattern No. in step S103. After the update, the process proceeds to step S104.
In step S104, it is monitored whether or not the data setting switch is operated, and if it is turned on, that is, if Yes, data setting described later is performed in step S105.
If No in step S104, or after data setting in step S105, the process proceeds to step S106.
[0065]
In step S106, the operation of the preparation key 59h is monitored. If the operation is not performed, that is, No, the process returns to Step S102. If the operation is performed, that is, if Yes, these data are stored in Step S107 based on the contents of the set pattern data and memory switch data. Data generated to drive a driving source such as the motor 70, stitch data for each stitch, the number of times of knife dropping of the knife a plurality of times, data relating to the position of the feed base 14, the cloth cutting motor 21 that drives the knife It includes drive amount data and the like.
In step S108, the cloth presser 16 is lowered and presses the cloth onto the upper surface of the feed table 14. In step S109, the X / Y motors 71 and 72, the turning motor 73, and the cloth cutting knife motor 74 are moved to the original position. And the presser foot 16 is raised in step S110.
[0066]
In step S111, the operation of the presser switch 58 is monitored, and if it is turned on, that is, Yes, the presser foot 16 is lowered in step S112. For example, when the operator needs to confirm the position of the cloth presser 16 and adjust the position of the cloth, for example, the operator presses the presser switch 58 again in step S113 to thereby press the cloth presser in step S114. 16 rises and returns to step S111.
If the presser switch 58 is not turned on in step S113, that is, if No, the operation of the start switch 57 is monitored in step S115, and if it is turned on, that is, if Yes, the process proceeds to step S116.
[0067]
In step S116, it is determined whether or not the first knife is selected in the data item “7” in the pattern data shown in FIG. If it is a tip knife, the cloth cutting knife operation | movement mentioned later is performed in step S117.
In the case of No in step S116, or after performing the cloth cutting knife operation in step S117, the boring operation is performed in step S118. This boring operation includes a series of operations such as moving the feed base 14 to the sewing start position and thread trimming after boring.
[0068]
After completion of the boring operation, the process proceeds to step S119, and the feed base 14, the needle bar, etc. move to the origin position.
Next, in step S120, it is determined whether or not the rear knife is selected in the data item “7” in the pattern data. If the rear knife is selected, that is, if Yes, the process proceeds to step S121. The cloth cutting knife operation similar to S117 is executed.
If it is determined in step S120 that it is not the rear knife, or after the cloth cutting knife operation in step S121 is completed, the presser foot 16 is raised in step S122, the process returns to step S111, and the operation switch of the presser switch 58 is again monitored. The above-described boring operation is repeated when 58 is turned on.
[0069]
Next, the flow of memory switch setting in step S101 will be described using 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, if Yes, the memory switch No. Is updated and displayed on the data item display section 59c and the corresponding value is displayed on the data display section 59e.
After step S402 or if No in step S401, the process proceeds to step S403.
[0070]
In step S403, the operation of the data +/- key 59f is monitored, and if it is turned on, that is, if Yes, in step S404, the memory switch No. displayed on the data item display unit 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. If it is turned on, that is, if Yes, the process proceeds to step S406, and the set memory switch The data is stored in the EEPROM 53, and then the process proceeds to step S102.
[0071]
Next, the flow of data setting in step S105 will be described using the flowchart of FIG.
First, in step S300, “1” is displayed on 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 section 59e.
Next, in step S301, the operation of the data item +/- key 59d is monitored, and if it is turned on, that is, if Yes, the data item number is updated and displayed on the data item display unit 59c in step S302, and The value to be displayed is displayed on the data display unit 59e.
After step S302 or if No in step S301, the process proceeds to step S303.
[0072]
In step S303, the operation of the data +/- key 59f is monitored, and if it is turned on, that is, if Yes, the value corresponding to the selected data item is updated in step S304, and the updated value is displayed. It displays on the data display part 59e.
After step S304, or if No in step S303, the process proceeds to step S305.
In step S305, the operation of the data setting key 59g is monitored, and if it is turned on, that is, if Yes, the data is updated to the changed data 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.
[0073]
Next, the flow of the cloth cutting knife operation in step S117 will be described using the flowchart of FIG.
First, in step S200, for example, the female number set in the data item “1” in the pattern data is set. From this, it is determined whether or not the knife is selected a plurality of times. If the knife is not a plurality of times, that is, No, the cloth cutting knife 61 is lowered in step S201, and the eyelet button hole 92 is formed in the cloth. Note that the knife No. 61 is used as the cloth cutting knife 61. When 0, that is, a knife having only a straight blade for forming the sleepy eye hole 94 is selected, the sleeper is formed by lowering the knife in step S201.
[0074]
If it is determined in step S200 that it is a knife a plurality of times, that is, if Yes, it is determined in step S202 whether or not a sleepy eye hole is set in the data item “10” in the pattern data. If the sleep hole is not set, that is, if the eyelet hole is set, No in step S202, and the process proceeds to step S203.
In step S203, the cloth cutting knife 61 is lowered to the eyelet cutting position, so that the cloth has the same shape as the eyelet knife part 61a and the straight knife part 61b of the cloth cutting knife 61. A part of is formed. In this state, since the above-mentioned uncut portion is present in the cloth, in step S204, the memory switch No. 1 shown in FIG. The cloth cutting knife 61 is lifted from the upper surface of the feed base 14 to the height of the idle feedable knife set (lifted height) set in 36, and in step S205, the feed base 14 is moved to the knife dropping position calculated in step S107. Move.
[0075]
In step S206, the cloth cutting knife 61 is lowered to the linear portion cutting position to cut the uncut portion, and the process proceeds to step S207. Note that if a knife without the gap 61d is used, steps S204 to S206 need not be executed.
On the other hand, if it is determined in step S202 that a sleepy eye hole is set, the determination is Yes and the process proceeds to step S212.
In step S212, the feed base 14 is moved to the first knife dropping position calculated in step S107. In step S213, by lowering the cloth cutting knife 61 to the straight section cutting position, a part of the linear hole 93 having the same shape as the straight knife section 61b of the cloth cutting knife 61 is formed in the cloth. The process proceeds to S207.
[0076]
In step S207, it is determined whether or not the number of knife dropping operations equal to the number of knife droppings calculated in step S107 has been performed. If no, the process proceeds to step S208, and similarly to step S204, the memory switch In step S209, the cloth cutting knife 61 is raised to the height of the idle feedable knife set in step S209, and the feed base 14 is moved to the next knife dropping position calculated in step S107. In step S210, 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, the process moves to step S211, the cloth cutting knife 61 moves to the origin position, and the process moves to step S118.
[0077]
Here, as described above, in steps S205, 209 and 212, by moving the feed base 14 by a predetermined amount, the position of the cloth cutting knife 61 relative to the feed base 14 (the knife dropping position) is changed relatively, A predetermined amount of button holes will be formed, and this knife dropping position is calculated as follows, for example. 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 while the feed base 14 is at the origin position. And
Further, as shown in FIG. 16A, the position of the rear end portion of the linear knife portion 61b of the cloth cutting knife 61 is defined as a knife dropping position, which is expressed using the Y coordinate. In the state where the cloth is first cut, the knife dropping position is located at the origin in the Y direction (Y = 0).
[0078]
First, the case where the eyelet hole 92 is formed in the cloth will be described with reference to FIG.
First, in order to form the eyelet portion 90 on the cloth, when the cloth cutting knife 61 is first lowered, the eyelet portion 90 is formed at a predetermined position on the cloth as described above, and the knife dropping position is Y = 0 (see FIGS. 16A and 1).
Next, the knife dropping position for cutting the uncut portion is Y = mc because the length of the uncut portion is mc (see FIGS. 16A and 16B).
Next, the knife dropping position (see FIGS. 16A and 16) for adding the length of the straight line portion 91 to the rear side by the length L is calculated as follows.
First, L = ml-lc-ma, and the number of times N of dropping the knife is expressed by N = L / mb. Here, when a remainder occurs in L / mb, it is rounded up to N = N + 1.
[0079]
When the knife dropping position regarding the i-th knife dropping (i = 1 to N) for adding the straight line portion 91 to the rear side is Yi, Yi = −L × i / N.
When i = N, that is, when the knife is dropped N times, Yi = −L, and the addition of the straight portion 91 is completed (see FIGS. 16A and 16).
However, when N = 0, that is, when it is not necessary to add the straight portion 91 to the rear side, the knife dropping position after cutting the uncut portion is not calculated.
[0080]
Next, the case where the sleep hole 94 is formed in the cloth will be described with reference to FIG.
First, in order to form the straight hole 93 in the cloth, the knife dropping position when the cloth cutting knife 61 is first lowered is Y = ma−mb−cc (see FIGS. 16B and 1). .
Next, the knife dropping position (see FIGS. 16B and 16B) for adding the length of the straight hole 93 to the rear side by the length L is calculated as follows.
First, L = ml−cc−lc−mb, and the number N of times of dropping the cloth cutting knife 61 is N = L / mb. Here, when a remainder occurs in L / mb, it is rounded up to N = N + 1.
[0081]
And if Yi is the knife dropping position regarding the i-th (i = 1 to N) knife dropping for adding the straight hole 93 to the rear side, Yi = ma−mb−cc−L × i / N Become.
When i = N, that is, when the cloth cutting knife 61 is dropped N times, the addition of the straight hole 93 is completed (see FIGS. 16B and 3).
However, when N = 0, that is, when it is not necessary to add the straight hole 93 to the rear side, Yi is not calculated.
In the above description, the description has been made assuming an ideal case for the sake of simplicity, but in reality, when a button hole is formed by adding a plurality of scalpels, a mechanical error may occur. There is a possibility that uncut portions may be generated between the cuts due to wrinkles of the set cloth or the like. For this reason, in order to form the button hole more securely, the button hole is formed by calculating the knife dropping position so that the cut portions at the time of dropping each knife overlap with a predetermined length (for example, about 1 mm) or more. Is preferred.
In order to calculate such a knife dropping frequency or knife dropping position, for example, when the CPU 54 calculates the knife dropping position in step S107 in FIG. 12, the setting set in the memory switch setting contents in FIG. This can be achieved by calculating the number of knife drops with mb shorter by a predetermined length u (for example, 1 mm), and calculating the knife drop position by setting mc longer by a predetermined length v (for example, 1 mm).
Specifically, for the eyelet overhang of FIG. 16A, the knife dropping position in (2) is calculated as Y = mc + v, and the number of knife droppings is calculated as N = L / (mb−u). For the sleep hole in FIG. 16 (b), N = L / (mb−u) is used, and only the uncut number N is calculated using mb−u.
[0082]
According to the control device 50 of the sewing machine shown in the present embodiment, the cut length correction (lc) can be set. Therefore, 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) are set as different values. Therefore, after forming a hole seam, there is a case in which a tack stop is formed so as to connect these two points in order to prevent fraying and reinforcement at the sewing start point and the sewing end point. When the straight portion 91 of the hole 92 and the straight hole 93 of the sleepy eye hole 94 extend to a position sandwiched between these two points, the straight portion 91 and the straight hole 93 are present. The needle may fall on the part where there is no cloth (incision part), and the sewing failure of the tacking may occur. By setting the cut length correction (lc), the straight part 91 and the linear shape It is possible to prevent the hole 93 from extending to a position between the sewing start point and the sewing end point, and to prevent the above-described sewing failure.
[0083]
Further, after the eyelet hole 92 is formed by the eyelet knife portion 61a and the straight knife portion 61b, the sewing machine is driven so that the straight hole 93 is formed following the straight portion 91 of the eyelet hole 92 by the straight knife portion 61b. Because of the control, the straight portion 91 of the eyelet hole 92 can be extended by a preset amount, and the eyelet hole 92 having a different length of the straight portion 91 can be formed without replacing the cloth cutting knife 61 and the knife receiver 62. can do.
Also, since the sleepy eye selection (ss) can be set, the straight hole 93 of the sleepy eye hole 94 can be formed using only the straight knife 61b of the knife (cloth cutting knife 61) a plurality of times, and the sleepy eye hole 94 can be formed. When forming, there is no need to replace with a predetermined cloth cutting knife.
[0084]
Further, since the sleepy eye hole 94 can be formed by cutting the cloth by the straight knife part 61b a plurality of times, the length of the straight hole 93 of the sleeper eye hole 94 can be changed without replacing the cloth cutting knife 61 and the knife receiver 62. Can be changed.
In addition, since the sleepy eye offset amount (cc) can be set, the straight hole 93 can be formed at an arbitrary position of the hole seam, and the cut length correction (lc) can be set. Can be arbitrarily changed, and a sleep eye hole 94 corresponding to various specifications can be formed.
[0085]
In addition, when the length of the button hole to be formed (ml-lc) is relatively long, a straight knife having a knife length (ma) substantially equal to the button hole length as shown in FIG. You may use the cloth cutting knife 65 provided with the structure where the length of the gap | interval part 65c between the part 65a and the eyelet knife part 65b is comparatively long, and the knife receiver 66 corresponding to this cloth cutting knife 65. In this case, only the operation of cutting the above-described uncut portion is performed, and the addition operation can be omitted, or the number of knife drops can be reduced, and the cycle time required for button hole formation can be shortened.
In addition, since the height of the knife that can be fed is set, if the height of the knife that can be fed is set to the same height as the thickness of the cloth, the rising amount of the cloth cutting knife 61 becomes the minimum necessary amount. Cycle time for buttonhole formation can be shortened.
[0086]
The present invention is not limited to the first embodiment, and can be changed as appropriate.
For example, the RAM 52 stores pattern data, and the EEPROM 53 stores memory switch data. For example, the RAM 52 stores memory switch data, and the EEPROM 53 stores pattern data. Alternatively, the RAM 52 or The EEPROM 53 may store both pattern data and memory switch data. A floppy (registered trademark) disk may be used instead of the EEPROM 53.
In addition, although the data regarding the buttonhole length is ml-lc, the buttonhole length may be set directly. In this case, hole length correction may be set so that hole length = (button hole length + hole length correction).
[0087]
Further, the vertical movement of the cloth cutting knife 61 is performed by controlling the driving of the cloth cutting knife motor 74. However, the present invention is not limited to this. For example, the cloth cutting knife 61 is moved upward, the eyelet cutting position, For example, a known actuator such as an air cylinder may be used as long as the structure can be stopped at three positions of the straight line cutting position.
Also, a so-called multiple knife is used as the cloth cutting knife, and an actuator capable of individually controlling the movement 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 formed. In doing so, the eyelet knife portion and the straight knife portion may be lowered at the same time, and when only the straight portion 91 is formed, only the straight knife portion may be lowered.
[0088]
Further, a so-called standard knife is used as the cloth cutting knife, and an actuator capable of individually controlling the movement 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 formed. At this time, the eyelet knife portion and the straight knife portion may be lowered at the same time, and when only the straight portion 91 is formed, only the straight knife portion may be lowered.
In addition, as the cloth cutting knife, a so-called standard knife in which the eyelet knife part and the linear knife part are integrated at the same height is used, and the knife receiver is connected to the part corresponding to the eyelet knife part of the cloth cutting knife and the linear knife part. It is also possible to provide an actuator that can be divided into portions corresponding to the above, and to individually control the movement of these portions, and to control the drive of the knife receiver in accordance with the shape of the button hole to be formed.
[0089]
In addition, two types of female receptacles, a female receptacle for forming eyelet holes and a female receptacle for forming sleepy eye holes, are provided, and these two types of female receptacles have a structure that can be arbitrarily selected by, for example, a turret method. It is also possible to select a female receptacle 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 changed as appropriate. The number of pattern data may be one.
Further, in the above embodiment, a plurality of pattern data are stored and one of them is selected to create the stitch data. However, a plurality of stitch data may be stored in the storage means (RAM 52).
[0090]
Alternatively, a plurality of pattern data and stitch data corresponding to each pattern data may be stored. In this case, it is only necessary that the stitch data is automatically specified when the pattern data is selected.
In the present embodiment, the case where the cloth cutting knife 61 is arranged on the upper side and driven downward with respect to the knife receiver 62 arranged on the lower side is shown, but on the contrary, the knife receiver 62 is moved upward. In addition, the cloth cutting knife 61 may be disposed below and the knife receiver 62 may be driven downward.
Further, either cutting of the uncut portion or extension (addition) of the straight portion 91 during the cloth cutting knife operation shown in the flowchart of FIG. 15 may be performed first.
[0091]
<Second Embodiment>
Next, a second embodiment of the present invention is shown in FIGS. The sewing machine 200 as an example of the present invention is a buttonhole sewing machine similar to the sewing machine 10 according to the first embodiment, and the configuration other than the cloth cutting device 201 is exactly the same. The reference numerals are attached and the description is omitted.
Hereinafter, the cloth cutting device 201 will be described in detail. The cloth cutting device 201 forms the eyelet button hole 92 and the sleepy eye hole 94 shown in FIG. 9 when buttonhole sewing is performed. Also in the second embodiment, the reference numerals of the female parts in FIG. 8A and the reference numerals of the button holes in FIGS. 9A and 9C will be described.
[0092]
The cloth cutting device 201 has cloth cutting means including a knife unit 100 and a knife receiver 160 as shown in FIGS. 18 and 19 so that the knife receiver 160 faces upward and the knife unit 100 faces downward. Is provided.
As shown in FIGS. 20 and 21, the female unit 100 is mainly configured by providing a female eyelet member 101 and a straight female member 102 on a female base member 103.
[0093]
The eyelet female member 101 is integrally formed from 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 in a substantially cylindrical shape. A drop-shaped eyelet knife 101b for forming the eyelet part 90 is formed at the upper end of the cylindrical part 101c. The inside of the cylindrical part 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.
[0094]
The straight female member 102 is integrally formed from 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 erected from the support plate 102a, and an upper end of the thin plate portion 102c. The straight part 91 of the eyelet button hole 92 and the straight knife 102b for forming the sleepy eye hole 94 are formed in the part. A cloth cutting knife is constituted by the eyelet knife 101b and the straight knife 102b. As can be seen from FIG. 18 and the like, the cloth cutting knife is arranged so that the direction of the straight portion 91 and the sleepy eye hole 94 formed by the straight knife 102b is It is provided so that it may become a direction.
[0095]
As shown in FIG. 20, the female base member 103 is a member that supports the entire female unit 100 by a base plate 103 a that is formed in a substantially rectangular shape with an arcuate rear edge when viewed from above.
The female base member 103 is fixed to the bed portion 200b by fixing screws 152, 152.
Furthermore, the guide key 150 fixed to the base plate 103a with the screw 151 is along a groove (not shown) formed in the bed portion 200b, so that the base plate 103a is in the left-right direction (the surface of FIG. 20). And can be fixed by the fixing screws 152, with the left and right positions adjusted appropriately.
[0096]
A female support 103b for supporting the eyelet female member 101 and the straight female member 102 is integrally formed at the front portion of the female base member 103 so as to rise from the base plate 103a. The upper part of the female support 103b is a rectangular parallelepiped block 103c. A concave surface (not shown) is formed on the upper surface of the block 103c, and the support plate 102a of the linear female member 102 is fitted into the concave surface. Yes.
Further, one side edge side of the support plate 102a is pressed from above by a linear knife fixing clamp 105b, and this linear knife fixing clamp 105b is fixed to a side surface of the block body 103c by a linear knife fixing screw 106b. Accordingly, the straight female member 102 is securely fixed to the block body 103 c, that is, the female base member 103.
[0097]
Adjustment screws 115a and 115b are screwed into the center portion of the block body 103c, as indicated by a broken line M2 in FIG. By adjusting the screwing degree of the adjusting screws 115a and 115b, the head of the adjusting screw 115a is appropriately protruded toward the eyelet knife base 104 side, and thereby, for the eyelet knife in a standing state (state shown in FIG. 21). The front side position of the base 104 is determined.
[0098]
Further, a rectangular parallelepiped recess 103d (FIG. 21) is formed inside the knife support 103b, and the eyelet knife base 104 is fitted in the recess 103d. A concave surface (not shown) is formed on the upper surface of the eyelet knife base 104, and a support plate 101a of the eyelet female member 101 is fitted into the concave surface. A fulcrum shaft 107 is attached so as to pass through the lower part of the knife support 103b and the eyelet knife base 104, and the eyelet knife base 104 is rotatable about the fulcrum shaft 107 with respect to the knife support 103b. Yes.
Further, one side edge side of the support plate 101a is pressed from above by the eyelet knife fixing clamp 105a, and this eyelet knife fixing clamp 105a is fixed to the eyelet knife base 104 by the eyelet knife fixing screw 106a. Thereby, the eyelet female member 101 is securely fixed to the eyelet knife base 104.
[0099]
A stopper member 120 for positioning the eyelet female member 101 is attached to a side surface of the eyelet knife base 104 opposite to the eyelet knife fixing clamp 105 a by screws 121. A lateral hole (not shown) is formed in the stopper member 120, and the lateral position of the stopper member 120 can be moved by sliding the lateral hole with respect to the screw 121. On the upper surface of the stopper member 120, an overhanging portion 120 a is formed that projects from the upper surface of the eyelet knife base 104. After the stopper member 120 is appropriately slid and adjusted in position, it is fixed to the eyelet knife base 104 with a screw 121, and the notch 101d of the eyelet female member 101 is abutted against the projecting portion 120a so that the eyelet female member 101 is moved. It is positioned and fixed by the eyelet knife fixing clamp 105a or the like as described above.
[0100]
A spring 108 is fitted to the fulcrum shaft 107, and both ends of the spring 108 abut against the base pin 109 fixed to the eyelet knife base 104 and the base plate 103a. Accordingly, the eyelet knife base 104 is urged counterclockwise in FIG. 21 by the spring 108.
[0101]
On the other hand, a double-acting air cylinder 110 is provided behind the knife base member 103. The air cylinder 110 is fixed by a cylinder screw 112, 112 to a cylinder mounting plate 111 that is attached to the base plate 103a by a set screw 113, 113 so that the front-rear position can be adjusted. A cylinder pin 114 is screwed into the tip of the rod 110a of the air cylinder 110. The tip of the cylinder pin 114 is in contact with the eyelet knife base 104.
[0102]
A link hole 114a penetrating in the horizontal direction is formed in the cylinder pin 114, and a link 116 is passed through the link hole 114a. 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 U-shaped 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. Note that an E-ring 118 is attached to each end of the link pins 117 and 117, and restricts the sliding movement of the link 116 so that the link 116 does not come off the link pins 117 and 117.
[0103]
When the air cylinder 110 is off, the rod 110a protrudes. At this time, the eyelet knife base 104 is pushed clockwise by the cylinder pin 114. This force is larger than the biasing force of the spring 108, and the eyelet knife base 104 is shown in FIG. Keep standing up as shown in.
When the air cylinder 110 is turned on, the rod 110a is retracted, the eyelet knife base 104 is pulled by the link 116 via the link pins 117 and 117, and the urging force of the spring 108 causes the fulcrum shaft 107 to rotate counterclockwise. To fall down (see FIG. 22B).
That is, the air cylinder 110 and the spring 108 are 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. .
[0104]
Inside the eyelet knife base 104, a cloth waste path 104a is formed so as to be obliquely downward and rearward so as to be continuous with the cloth waste path 101e of the eyelet female member 101.
The rear end part 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 and falls from the opening. Yes.
A hole (not shown) is also formed in the base plate 103a of the female base member 103, and a cylindrical boss 131 is press-fitted into the hole. Cloth falling from the opening falls into the boss hole 131a formed in the boss 131, or falls in the vicinity of the upper edge 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.
Note that a cloth guard 122 is set on the upper surface of the base plate 103a by set screws 123 and 123 so as to surround the rear of the boss hole 131a so that cloth waste discharged from the opening of the cloth path 104a is not scattered. It is fixed.
[0105]
A tip of a pipe 133 is attached inside the boss 131 so as to communicate with the boss hole 131a. The other end of the pipe 133 is connected to the inside of the aspirator 134. The pipe 133 is fixed to the boss 131 by a set screw 132 and to the suction unit 134 by a set screw 135.
[0106]
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 aspirator 134, and the air tube 140 is fixed to the aspirator 134 by the clasp 142. The air tube 140 supplies air from an air supply source (not shown) to the aspirator 134.
The tip is connected to an air pipe 136 inside the suction device 134 via a joint 141. The end of the air pipe 136 on the joint 141 side is squeezed, and the air supplied through the air tube 140 and the joint 141 is pressurized and supplied into the air pipe 136 in the direction of arrow A. . 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. The pipe 133 is connected to an air pipe 136 in the suction device 134.
[0107]
Air is supplied from the air tube 140, wind is generated in the direction of arrow A, and wind in the direction of arrow B is generated in the pipe 133 due to the negative pressure generated at that time. By this air flow, the cloth waste is sucked and guided to the outside of the sewing machine 200 by the hose 138.
In FIG. 21, most of the pipe 133, the connecting pipe 137, and the hose 138 are shown in cross section, and the suction unit 134 is shown schematically in its internal structure.
[0108]
As shown in FIG. 22, the flat knife receiver 160 is fixed to the knife receiver mounting base 162, and has a flat bottom surface and a straight line that matches the eyelet knife receiving portion 160 b that matches the eyelet knife 101 b and the straight knife 102 b. A knife receiving portion 160c is formed. A buttonhole is formed by cutting the workpiece while pressing the fabric between the flat knife receiver 160, the eye knife 101b, and the straight knife 102b.
The knife receiver mounting base 162 is fixed to the lower end of the linear movement shaft 40 of a knife receiver driving means (cloth cutting drive means) 170 having exactly the same configuration as the cloth cutting knife driving means 20 of the first embodiment. Thereby, the knife receiver 160 is driven up and down at a predetermined timing by the knife receiver driving means 170.
[0109]
A lateral air hole 165 through which air passes in the lateral direction is formed inside the knife receiving mount 162. One end of the lateral air hole 165 is closed by a cap 164, and a joint 163 is attached to the other end, and an air line 175 (FIG. 19) is connected to the joint 163. A vertical air hole 166 is formed from substantially the center of the horizontal air hole 165 downward, and the vertical air hole 166 is connected to a vertical hole 160 a 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 blows 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 female member 101 by the air blown out from the vertical hole 160a.
[0110]
By the way, a gap w2 exists between the eyelet knife 101b on the eyelet knife base 104 in the standing state and the straight knife 102b, as is apparent from FIGS. The length of the gap w2 is set to be shorter than the length w1 at which the flat knife receiver 160 and the straight knife 102b match. In particular, w1−w2 = 2 mm or less is preferable. By setting in this way, when forming the eyelet button hole between the eyelet knife 101b / straight knife 102b and the flat knife receiver 160, the first cut is performed, and then the uncut portion corresponding to the gap w2 is formed. When cutting, the straight knife 102b and the flat knife receiver 160 can be cut by one operation, and the cutting edge is slightly overlapped with the first cutting edge, so that the cutting can be reliably performed.
Here, the length of the gap w2 corresponds to the length mc of the first embodiment, and the length w1 at which the flat knife receiver 160 and the straight knife 102b match corresponds to the length mb of the linear knife portion 61b. . In the following description, it is assumed that the length of the gap w2 is “mc” and the length w1 is “mb”.
[0111]
Furthermore, in the cloth cutting device 201 of the present embodiment, a step knife receiver 167 can be attached as shown in FIG. The lower surface of the step knife receiver 167 includes a straight knife receiver 169 that matches the straight knife 102b, and a eyelet knife receiver 168 that protrudes downward by a step 167a from the linear knife receiver 169 and matches the eyelet knife 101b. The step 167a is formed to have a predetermined height, for example, a height of 2 to 3 mm so that the straight knife 102b does not touch the straight knife receiver 169 when the eyelet knife 101b and the eyelet knife receiver 168 match. .
Similar to the flat knife receiver 160, a vertical hole 167 b is formed in the step knife receiver 167.
In the case of using this stepped knife receiver 167, only the eyelet portion 90 can be formed. Details of the operation will be described later.
[0112]
As in the first embodiment, the cloth cutting device 201 can also be attached with a standard knife that is not formed by dividing the eyelet knife and the straight knife, and is formed continuously in one piece, or a standard knife dedicated to the sleepy eye hole.
[0113]
The cloth cutting device 201 having the above configuration forms a predetermined hole in the cloth in cooperation with the feed base 14 which is a relative movement means of the present invention for feeding the cloth in the front-rear direction. Hereinafter, the cloth cutting device 201 and the fourth mechanical operation of feeding will be described with reference to FIGS. FIG. 24 to FIG. 26 are diagrams showing how button holes are formed step by step, where the gray color indicates a portion cut at that step, the hatched portion indicates a portion cut at the previous step, and symbol P indicates the surrounding of the button hole. Shows overlock seams.
(1) A case where a flat knife receiver 160 is attached as the knife receiver and the eyelet button hole 92 is formed after sewing the overlock seam will be described.
First, after forming the overlock stitch P, the upper thread is cut by a mechanism (not shown), and the cloth (sewing material) is conveyed to a predetermined cloth cutting position on the knife unit 100 by the feed base 14. At this time, as shown in FIG. 22A, the cloth cutting device 201 is in a state where the air cylinder 110 is off and the rod 110a protrudes, and the eyelet knife base 104 is pushed by the cylinder pin 114 to stand. The eyelet knife 101b is in a first position where the workpiece can be cut.
[0114]
As the knife receiver driving means 170 is driven, the flat knife receiver 160 is lowered 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, air begins to be supplied via the joint 163 of the knife receiver mount 162, and the horizontal air hole 165 and the vertical air hole 166 are supplied. Air is jetted from the vertical hole 160a toward the cloth waste path 101e of the eyelet female member 101. This air injection from above continues until the flat knife receiver 160 rises and is sufficiently separated from the eyelet knife 101b after cutting the eyelet portion 90.
The flat knife receiver 160 continues to descend, and finally matches with the eyelet knife 101b and the straight knife 102b, and the object to be sewn has an eyelet portion 90 and a straight portion as shown in gray in FIG. A first cut h1 which is a part of 91 is formed. An uncut portion S corresponding to the gap length mc described above exists between the eyelet portion 90 and the first cut h1.
[0115]
During the cutting, if drop-like cloth waste is generated between the eyelet knife 101b and the flat knife receiver 160, the cloth waste is pushed downward by the air blown from above, and passes through the cloth waste paths 101e and 104a. It is discharged from the knife base 104 and falls into the boss hole 131a of the boss 131 or its periphery without being scattered by the cloth guard 122.
On the other hand, 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 and enters the suction device 134, and the connection pipe 137, It passes through the hose 138 and is collected outside the sewing machine 200. The timing of the air supplied from the joint 141 is not particularly limited as long as it is from the start of the supply of air from above through the joint 163 to the end of all the cloth cutting operations. It is more preferable that the supply of air from 163 is almost simultaneous. At such timing, the air from above and the momentum to be sucked in can be combined to reliably discharge the cloth waste, and it is also possible to share the solenoid valve for supplying air to the joint 163 and the joint 141. It is easy to configure and control.
[0116]
Next, the knife receiver driving means 170 operates in the reverse direction, and the flat knife receiver 160 rises to a height at which it does not interfere with the movement of the cloth and stops. At this time, the air cylinder 110 is turned on and the rod 110a is retracted. Accordingly, the eyelet knife base 104 is pulled by the link 116 passed through the cylinder pin 114, and the eyelet knife base 104 is tilted counterclockwise about the fulcrum shaft 107 by the biasing force of the spring 108. It rotates and retracts, and it will be in the state shown in FIG.22 (b). At this time, the eyelet knife 101b is in a 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 is as follows. There is a case where a cloth that is to be sewn is in close contact with the eyelet knife 101b, and if it is only the spring 108, the eyelet knife base 104 is unlikely to fall down due to the frictional force with the cloth. In view of this, the eyelet knife 104 is constructed so that it can be securely retracted by pulling with the cylinder pin 114.
[0117]
After the rod 110a of the air cylinder 110 is retracted, the feed base 14 is operated to move the cloth to the next cutting position. Again, since the flat knife receiver 160 is lowered by the knife receiver driving means 170 and the eyelet knife 101b is retracted, it matches only with the straight knife 102b, and the second cut h2 shown in gray in FIG. 24B is formed. Is done. By this cutting, the eyelet portion 90 and the straight portion 91 are connected.
[0118]
Here, if the cutting length has not reached “sewing length (ml) −cut length correction (lc)”, the flat knife receiver 160 rises again to a position where it does not interfere with the movement of the cloth, and the cloth is fed. The flat knife receiver 160 is moved down to a predetermined position by the table 14 and is aligned with the straight knife 102b, so that a third cut h3 shown in FIG. 24C is formed. As a result, the eyelet button hole 92 composed of the eyelet portion 90 and the straight portion 91 is obtained. In this example, the cutting is completed by three operations. However, the number of times is an example, and when the eyelet button hole is formed, it may be any number of times as long as it is two times or more.
In addition, since cloth waste is not generated in the second and subsequent cuts, it is not necessary to supply air to the joints 163 and 141.
After the above cutting operation is completed, the processing such as lower thread cutting is terminated.
[0119]
In addition, the position of the cloth movement by the feed table 14 before the second and third cuts is adjusted so as to overlap 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 is the same as the eyelet portion 90 and the first notch h1 (about 1 mm). A second cut is made to overlap. In the third cutting, it is preferable that the second cutting h2 cut at the second time is cut by 1 mm or more.
That is, each movement amount of the feed base 14 during the cloth cutting operation is determined by the knife No. Calculated from “the length that can be cut at the first time (a part of the straight portion 91 from the top of the eyelet portion 90)”, “the actual cutting length mb by the straight knife 102b”, and “the uncut length”. It has come to be. Details of the control will be described later.
[0120]
(2) After forming the eyelet button hole, the case where the overlock stitch P is sewn around it will be described.
First, after the fabric is conveyed to a predetermined cutting position by the feed base 14, the fabric is cut in the same manner as in (1), and then conveyed to the sewing position by the feed base 14, and then processing such as thread trimming is performed.
[0121]
Next, (3) the case where the sleep eye hole 94 is formed by the flat knife receiver 160 and the case where the step knife receiver 167 is used in (4) will be described. However, as is apparent from the above (1) and (2) for overlock stitching, the temporal relationship between overlock stitching and cloth cutting is not directly related to the operation of the cloth cutting device 200 itself. Only the operation of the cutting apparatus 200 will be described.
(3) The case where the sleep eye hole 94 is formed will be described.
First, the air cylinder 110 is turned on, the rod 110a is retracted, the eyelet knife base 104 is pulled, and the eyelet knife base 104 is retracted by the urging force of the spring 108, as shown in FIG. become. In this state, the cloth is conveyed to a predetermined cloth cutting position by the feed table 14.
Since the knife receiver driving means 170 is actuated, the plane knife receiver 160 is lowered by a predetermined amount, and the eyelet knife 101b is retracted, it matches only with the straight knife 102b, and the first cut shown in gray in FIG. h4 is formed.
[0122]
If the amount of cutting does not reach the required length, as in the second operation of (1), the flat knife receiver 160 rises to such an extent that it does not interfere with the movement of the cloth, the feed base 14 moves a predetermined distance, and is again flat. The knife receiver 160 is lowered to perform the second cutting, and a second cut h5 is formed as shown in FIG. Similarly, when the third cut is performed, the third cut h6 is cut as shown in FIG.
In the case of the sleepy eye hole 94, the cutting position and the cutting length can be arbitrarily changed with respect to the overlock stitching length by changing the numerical values of the “sleepy eye offset amount cc” and the “cut length correction lc”. it can.
[0123]
In this way, 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 with the straight knife 102b. Further, since cloth waste is not generated, air is not supplied to the joints 163 and 141.
Further, the amount of movement of the feed base 14 before the second and third cuts is adjusted so that it overlaps by 1 mm or more with the cut cut before that, as in the case of forming the eyelet button hole 92.
As described above in (1) to (3), the eyelet button hole 92 and the sleepy eye hole 94 can be switched and the cutting length can be changed without exchanging the knife and the knife receiver.
[0124]
(4) Next, a case where the stepped female receiver 167 is attached to the female receiver mounting base 162 will be described.
When forming a hole such as an eyelet button hole 92 or a flower hole with the step knife receiver 167, first, as shown in FIG. 23 (a), the cloth cutting device 201 has the air cylinder 110 turned off and the rod 110a The eyelet protrudes and the eyelet knife base 104 is pushed by the cylinder pin 114 to stand.
[0125]
As the knife receiver driving means 170 is driven, the step knife receiver 167 is lowered by a predetermined amount. Since the step knife receiver 167 is provided with a step 167a, only the eyelet portion 90 is formed as shown by the gray color in FIG. When only a hole such as a flower hole is formed, the stepped knife receiver 167 is raised to the original position, and the operation is finished.
In the case of the eyelet button hole 92, the air cylinder 110 is turned on thereafter, and the eyelet knife base 104 is retracted to the state shown in FIG. On the other hand, the operation of raising the step knife receiver 167 to a height that does not interfere with the movement of the cloth, moving the cloth on the feed base 14 and lowering the step knife receiver 167 is repeated for the required length, and FIG. As shown in the gray color of d), the first cut h7, the second cut h8, and the third cut h9 are sequentially added to form the eyelet button hole 92. In addition, the movement of the cloth by the feed base 14 before the second, third, and fourth cutting is performed so as to overlap with a cut portion formed before that, for example, by 1 mm or more.
[0126]
Similarly to the above (1), when the stepped knife receiver 167 descends to a certain position close to the eyelet knife 101b at the first cutting, air starts to be supplied via the joint 163 of the knife receiver mounting base 162, Air is jetted from the lower surface of the step knife receiver 167 toward the cloth waste path 101e of the eyelet female member 101. In accordance with this, air begins to be supplied also to the joint 141 on the suction device 134 side. This supply of air continues until the step knife receiver 167 rises after the eyelet portion 90 is cut and is sufficiently separated from the eyelet knife 101b.
[0127]
The case where the sleep eye hole 94 is formed using the stepped knife receiver 167 is exactly the same as (2) above.
As described above, if the stepped knife receiver 167 is used, 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.
[0128]
Next, the control device 180 provided in the sewing machine 200 will be described with reference to FIG. Since the control device 180 is substantially the same as the control device 50 of the first embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and only differences from the first embodiment will be described below. To do.
In the control device 180, an air cylinder driving 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, thereby causing the foundation 104 for the eyelet knife to fall or stand up.
Further, the controller 180 controls the on / off operation of the air compressor 77b that supplies air to the air tube 140 and the air line 175 via the interface 55 and the air compressor drive electromagnetic valve 77a.
[0129]
As in the first embodiment, the RAM 52 stores a plurality of pattern data, stores one data selected from these data via the operation panel 59, and changes the data value after selection. Is also a storage means for storing.
The data items of the pattern data are almost the same as those in FIG. 7, but only the data item 10 is slightly different.
The data item 10 which is the hole type selection data of the present invention includes the following items (1) to (4) for the workpiece when one of the flat knife receiver 160 or the step knife receiver 167 is used as the knife receiver. These four types of sewing are selected.
(1) Formation of eyelet button hole 92 by plane knife receiver 160 (hereinafter referred to as (1) “plane knife holder / eyelet button hole” formation).
(2) Formation of the sleep eye hole 94 by the flat knife receiver 160 or the step knife receiver 167 (hereinafter referred to as (2) “sleep eye hole” formation).
(3) Formation of the eyelet button hole 92 by the stepped knife receiver 167 (hereinafter referred to as (3) “Stepped knife receiver / eyelet button hole” formation).
{Circle around (4)} One of the formation of the eyelet portion 90 only by the stepped knife receiver 167 (hereinafter referred to as {circle around (4)} formation of the stepped knife receptacle / eyelet portion only) is selected.
[0130]
In accordance with this, “ss” as the data item name is not “sleeping eye selection” but “sleeping eye / eyelet selection”, and is used to select any one of (1) to (4) above. Corresponds to the selected data. Specifically, set “0” to select “1” “flat knife holder / eyelet button hole”, and “1” to select “2” “sleep eye hole”. , ▲ 3 ▼ Set “2” to select “Step knife receptacle / eyelet button hole”, ▲ 4 ▼ Set “3” to select “Step knife receptacle / eyelet button only” Thus, it is possible to set a desired hole and overlock seam.
[0131]
The setting contents of the memory switch are almost the same as in FIG. About 36, it becomes the "feeding scalpel receiving height".
[0132]
As in the first embodiment, the actually attached female No. In accordance with data item 1, the female No. Is supposed to be selected. Also in this embodiment, female No. The standard knife is set to 0 to 5, and knife No. 6 to 10 are set a plurality of times of scalpels composed of the eyelet female member 101 and the straight female member 102, that is, a scalpel that needs to be driven twice or more to form the eyelet buttonhole.
[0133]
Next, a flow of forming a buttonhole stitch 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.
A characteristic flow of the cloth cutting knife operation in the present embodiment will be described with reference to the flowchart of FIG. As a premise, the operator attaches an appropriate knife and a knife receiver according to the hole to be formed, and sets predetermined data from the operation panel 59 accordingly.
[0134]
First, in step S500, for example, the female number set in the data item “1” in the pattern data is set. From this, it is determined whether or not the knife is selected a plurality of times. If the standard knife and the flat knife receiver 160 are attached, it becomes No instead of the knife a plurality of times, and the flat knife receiver 160 is lowered in step S518 to form a button hole in the cloth. At this time, female no. 0, that is, if a knife having only a straight blade for forming the sleepy eye hole 94 is selected, a sleepy eye is formed in step S518, and the knife No. When 1 to 5 are selected, an eyelet button hole is formed.
[0135]
If it is determined in step S500 that the knife is a plurality of times, it is determined in step S501 whether the setting of the data item “10” in the pattern data is ss = 1, that is, whether the sleepy eye hole is selected. Determine whether. If the sleep eye hole is not selected, that is, if ss = 0, 2, or 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 object to be sewn is a flat knife receiver 160, a part of the eyelet 90 and the straight part 91 corresponding to the shape and size of the eyelet 101b of the eyelet female member and the straight knife 102b of the straight female member 102 are used. Is formed. In the case of the stepped female receiver 167, only the eyelet portion 90 is formed.
Next, in step S503, the air compressor 77b is turned on after being turned on for about 50 milliseconds.
[0136]
Next, 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, whether only the eyelet portion 90 is selected. If only the eyelet part 90 is selected (Yes), the cloth cutting operation is ended, and 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 button hole 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 No. The flat knife receiver 160 (step knife receiver 167) is raised to a height that does not interfere with the movement of the feed base 14 in accordance with the “blank feedable knife height” set in 36.
Next, by turning on the air cylinder 110 in step S506, the eyelet female member 101 falls as shown in FIG. 22B or FIG. 23B, and the process proceeds to step S507. Thereafter, only cloth cutting with the straight knife 102b is possible.
[0137]
In step S507, the feed table 14 is moved to the second cloth cutting position calculated in step S107 corresponding to the gap w1 (FIG. 22A). The amount of movement at this time is controlled so that the knife receiver descends to a position where it slightly overlaps the cut cut first time as described above. Specifically, in the case of the flat knife receiver 160, it is a position for cutting an uncut portion corresponding to the gap w2, and in the case of the step knife receiver 167, the tip of the straight portion 91 connected to the eyelet portion 90. This is the position to cut the part.
Next, in step S508, the flat knife receiver 160 or the step knife receiver 167 is lowered to the cutting position, the fabric is cut, the process proceeds to step S509, and the process proceeds to step S509.
[0138]
On the other hand, if it is determined in step S501 that Yes, that is, ss = 1, and the sleep eye hole is selected, the process proceeds to step S515. In step S515, the air cylinder 110 is turned on and the eyelet female member 101 falls. Thereafter, only cutting with the straight female member 102 is possible.
Next, in step S516, the feed base 14 is moved to the first knife receiving position (cloth cutting position) calculated in step S107. In step S517, the flat knife receiver 160 or the step knife receiver 167 is lowered to the cutting position, and a straight hole corresponding to the shape of the straight knife 102b and the matching length with the knife receiver is formed in the sewing product. The process proceeds to step S509.
[0139]
In step S509, it is determined whether or not the number of knife dropping operations equal to the number of knife droppings calculated in step S107 has been performed. If no, the process proceeds to step S510, and in the same manner as in step S505, empty. The flat knife receiver 160 or the step knife receiver 167 is raised to the 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.
In step S512, the knife receiver is lowered to the cutting position, added by a predetermined length, and the process returns to step S509. Whether or not the knife receiving operation of the same number as the number of knife droppings calculated in step S107 has been performed again. In the case of Yes, that is, in the case where the formation of the button hole is completed, the process proceeds to step S513. Here, the flat knife receiver 160 or the step knife receiver 167 is raised to the original origin position (uppermost position), and then in step S514, the air cylinder 110 is turned off and the eyelet knife member 101 is erected to cut the cloth. The knife operation process is terminated.
When step S514 is reached via step S504 or step S518, the air cylinder 110 remains off, but there is no problem even if an off command is output in the off state.
[0140]
By the way, the lowering position in the cutting for forming the eyelet button hole 92 or the eyelet part 90 in step S502 and step S518 and the other lowering positions are controlled so that the former is lowered to a lower position. This is because when the eyelet is formed, the matching area is large and it is necessary to push the knife receiver with a stronger force.
[0141]
Here, as described above, in steps S507, S511, and S516, the position of the cloth cutting device 201 relative to the feed base 14 (the knife receiving position) is relatively changed by moving the feed base 14 by a predetermined amount. A button hole of a predetermined length is formed. This knife receiving position is calculated as follows, for example. Below, the calculation method of the knife receiving position is demonstrated based on FIG. FIG. 29A is a diagram for explaining the case where ss = 0, (b) is ss = 1, (c) is ss = 2, and (d) is ss = 3. Furthermore, 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.
[0142]
In order to facilitate understanding, it is assumed that the eyelet 90 is formed at a predetermined position on the cloth by lowering the knife receiver while the feed base 14 is at the origin position.
Further, as shown in FIG. 29A, the rear end portion of the matching area between the flat knife receiver 160 (step knife receiver 167) and the linear knife 102b is defined as a knife receiving position, which is expressed using the Y coordinate. In addition, the knife receiving position in the state in which the cloth is first cut in FIG. 29A is the Y-direction origin (Y = 0), and (b) to (d) are adjusted to (a), (a ) Is set to Y = 0.
[0143]
First, the case where the eyelet button hole 92 is formed in the cloth using the flat knife receiver 160 will be described with reference to FIG.
When the flat knife receiver 160 is first lowered to form part of the eyelet part 90 and the straight line part 91 on the cloth, as described above, the knife receiving position is a predetermined position where Y = 0 (FIG. 29). (See (1) of (a)). The relationship between the flat knife receiver 160, the eyelet female member 101, and the straight female member 102 at this time is as shown in FIG.
[0144]
Next, the knife receiving position for cutting the uncut portion corresponding to w2 has the length mc of the uncut portion, so that as shown in (2) of FIG. mc.
Next, the knife receiving position (see FIGS. 29 (a) and (3)) for adding the length of the straight portion 91 to the rear side by a length L (uncut length) is calculated as follows. Is done.
First, L = ml−lc−ma, and the number N of times of dropping the flat knife receiver 160 is expressed by N = L / mb. Here, when a remainder occurs in L / mb, it is rounded up to N = N + 1.
[0145]
Then, Yi = −L × i / N, where Yi is the knife receiving position regarding the i-th (i = 1 to N) knife receiving for cutting the straight line portion 91 backward. When i = N, that is, when the knife is dropped N times, Yi = −L, and the addition of the straight portion 91 is completed (see FIGS. 29A and 29).
However, when N = 0, 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. 29 (a), the eyelet female member 101 is in the collapsed state shown in FIG. 30 (b), and only the flat knife receiver 160 and the straight female member 102 are matched.
[0146]
Next, the case where the sleep hole 94 is formed in the cloth will be described with reference to FIG. When the sleep eye hole 94 is formed, the flat knife receiver 160 and the stepped knife receiver 167 may be used as the knife receiver, and the eyelet female member 101 falls down in any case, as shown in FIGS. 30 (b) and (d). As shown, the knife receiver matches only the straight female member 102.
When the sleep hole 94 is formed, the knife receiving position when the flat knife receiver 160 (step knife receiver 167) is first lowered is Y = ma−mb−cc (see FIGS. 29B and 1). reference).
Next, the knife receiving position (see FIGS. 29B and 2) for adding the length of the straight hole 93 to the rear side by the length L is calculated as follows.
First, L = ml−cc−lc−mb, and the number N of times when the flat knife receiver 160 (step knife receiver 167) is dropped is N = L / mb. Here, when a remainder occurs in L / mb, it is rounded up to N = N + 1.
[0147]
Then, Yi = ma−mb−cc−L × i / N, where Yi is the knife receiving position for the i-th (i = 1 to N) knife dropping for adding the straight hole 93 to the rear side. It becomes.
When i = N, that is, when the flat knife receiver 160 is dropped N times, the addition of the straight hole 93 is completed (see FIGS. 29B and 3).
However, when N = 0, that is, when it is not necessary to add the straight hole 93 to the rear side, Yi is not calculated.
[0148]
Next, the case where the eyelet button hole 92 is formed using the step knife receiver 167 will be described with reference to FIG.
First, in order to form the eyelet part 90 on the cloth, the knife receiving position when the stepped female receiver 167 is first lowered is the eyelet part 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 only matches the eyelet female member 101, does not match the straight female member 102, and only the eyelet portion 90 is formed.
[0149]
Next, the knife receiving position (see FIGS. 29 (c) (2) to (4)) for adding the length of the straight portion 91 to the rear side by the length L is calculated as follows. Between (2) and (4) in FIG. 29 (c), the eyelet female member 101 is tilted as shown in FIG. 30 (d), and the stepped female receiver 167 matches only with the straight female member 102.
First, the first knife receiving position of the straight line portion 91 is Y = mc since the length of the uncut portion is mc (see FIGS. 29C and 29).
[0150]
Next, the knife receiving position ((3) in FIG. 29C) for adding the length of the straight line portion 91 to the rear side by the length L is calculated as follows. That is, L = ml−lc−ma + mc, and the number N of times the knife receiver is dropped is represented by N = L / mb. Here, when a remainder occurs in L / mb, it is rounded up to N = N + 1.
Then, if the i-th (i = 1 to N) female receiving position for adding the straight line portion 91 to the rear side is Yi, Yi = mc−L × i / N. When i = N, that is, when the knife receiver is dropped, Yi = −L + mc = ml−lc−ma, and the addition of the straight portion 91 is completed ((4) in FIG. 29C). .
In the above description, as in the description of the first embodiment, the description has been made assuming an ideal case in order to simplify the description. However, in practice, the first embodiment is described. As with, the number of times the knife is received with mb shortened by a predetermined length u (for example, 1 mm) with respect to the setting value set in the memory switch setting contents in order to prevent uncut between cuttings. And mc is increased by a predetermined length v (for example, 1 mm), the knife receiving position is calculated, and a button hole is formed so that a predetermined amount of the cut at each receiving of the knife is overlapped.
Specifically, in the case of the eyelet overhang of FIG. 29A, the knife receiving position in (2) is calculated as Y = mc + v, and the knife receiving frequency (N) is N = L / (mb−u). ). In the case of sleep stagnation in FIG. 29B, it is assumed that N = L / (mb−u), and only the number of uncut times N is calculated using mb−u.
FIG. 29 (c) In the case of eyelet overhanging, the knife receiving position in (2) is calculated as Y = mc + v, and the number of knife receiving times (N) in (3) and after, and the i-th knife receiving position ( Yi) is calculated as N = L / (mb−u), L = ml−lc−ma + mc + v, Yi = mc + v−L × i / N.
[0151]
Next, a case where only the eyelet part 90 is formed will be described with reference to FIG. At this time, as shown in FIG. 30C, the stepped knife receiver 167 matches only with the eyelet female member 101 and does not match with the straight female member 102.
In this case, in order to form the eyelet portion 90 on the cloth, when the stepped knife receiver 167 is first lowered, the eyelet portion 90 is formed at a predetermined position on the cloth as described above, and the knife receiving position is lowered. Y = 0 ((1) in FIG. 29D). Since the straight line portion 91 is not cut, this is completed.
[0152]
According to the sewing machine 200 including the cloth cutting device 201 described above, the eyelet female member 101b rotates to move the first position where the eyelet knife 101b can cut the cloth and the second position where the eyelet knife 101 is retracted. Further, since the fabric can be moved in the front-rear direction by the feed base 14, when the flat knife receiver 160 is used, the eyelet button hole 92 and the sleepy eye 94 can be switched without changing the knife receiver and the knife. The cutting length can be changed freely. Further, if the stepped knife receiver 167 is used, it is possible to form only the eyelet portion 90, the eyelet button hole 92 and the sleep eye hole 94 without changing the knife receiver and the knife, and the button holes of various lengths can be formed. Can be formed.
[0153]
Furthermore, according to the sewing machine 200, control is performed according to the same pattern data and control method as in the first embodiment, so that the cut length correction (lc) can be set as in the first embodiment. Further, the straight portion 91 and the straight hole 93 can be prevented from extending to a position between the sewing start point and the sewing end point, and the above-described sewing failure can be prevented.
In addition, since the sleepy eye offset amount (cc) can be set, the straight hole 93 can be formed at an arbitrary position of the hole seam, and the cut length correction (lc) can be set. Can be arbitrarily changed, and a sleep eye hole 94 corresponding to various specifications can be formed.
Also, since the height of the knife receiver that can be fed can be set, if the height of the knife receiver that can be fed is set to the same height as the thickness of the cloth, the amount of lift of the knife receiver will be the minimum necessary amount. Cycle time for buttonhole formation can be shortened.
[0154]
In addition, the sewing machine 200 has the following operational effects as compared with the sewing machine of the first embodiment.
1. Since not only the eyelet knife 101b but also the straight knife 102b is cut by the push-off method, the cutting edge of the straight knife 102b can be made rounder than the straight knife part 61b of the first embodiment, so that the cloth is hooked when setting the cloth. Hateful. Moreover, since the cutting edge is round, the sharpness of the knife is not easily lowered, and the fabric is not pulled during cutting due to the reduced sharpness.
Furthermore, since the groove is not provided on the female receiving side as in the first embodiment, the operation for removing chips in the groove is not required.
[0155]
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 collecting path is provided on the bed portion 200b side. The pocket under the arm can be used widely.
3. The cloth waste that passes through the cloth waste paths 101e and 104a by the cloth guard 122 is easily collected at a predetermined position on the base plate 103a without being scattered, and the cloth waste is collected by sucking it with the suction device 134. be able to. That is, even if the path for collecting cloth waste is divided into the cloth waste path 104a and the boss hole 131a, it can be reliably recovered. Further, since the path is divided, even if the cloth path on the female unit 100 side is changed according to the retracting direction of the eyelet knife, for example, with the base plate 103a as a boundary (see Modification 1), the base plate 103a If the mounting position of the boss 133 is changed, a similar collection structure can be obtained, and the cloth waste path can be set freely.
[0156]
In the second embodiment, both the flat knife receiver and the step knife holder can be used as the knife receiver. However, as the cloth cutting knife, the straight knife part is higher so that the eyelet knife part is higher. You may enable it to use what has a level | step difference between. In this case, even if a 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.
[0157]
A modification of the second embodiment will be described.
<Modification 1>
Modification 1 will be described with reference to FIGS. 31 and 32. 31 and 32, members identical to those in FIGS. 20 to 22 are assigned the same reference numerals and description thereof is omitted.
In the female unit 300 in the first modification, a female base member 303 is used instead of the female base member 103. Similar to the female base member 103, the female base member 303 is formed such that the base plate 303a is fixed to the bed portion of the sewing machine 200 by fixing screws 152 and 152, and the female support 303b rises at the front portion of the base plate 303a. Further, a block body 303c is formed on the upper part of the female support body 303b, and the straight female member 102 is fitted on the upper surface thereof, as in the second embodiment. However, the female support 303b here has a short rear side compared to the female support 103b, and has a width that supports the block body 303c from directly below. Absent.
[0158]
A flat slide portion 303d is provided on the upper surface of the base plate 303a, and a guide groove 303e is provided in the center of the slide portion 303d along the front-rear direction.
On the other hand, the eyelet knife base 304 is provided on the upper surface of the slide portion 303d. The eyelet female member 101 is fixed to the upper surface of the eyelet knife base 304 as in the second embodiment, and a cloth waste path 101e is formed inside the eyelet female member 101. On the lower surface of the eyelet knife base 304, a fitting protrusion 304b for fitting into the guide groove 303e is provided. Accordingly, the eyelet knife base 304 can be moved back and forth on the upper surface of the slide portion along the guide groove 303e.
[0159]
In the eyelet knife base 304, a cloth waste path 304a that is continuous with the cloth waste path 101e of the eyelet female member 101 is formed. This cloth waste path 304a is different from the cloth waste path 104a formed obliquely downward and rearward, so that the cloth waste path 304a does not overlap with the forward / backward movement path of the eyelet knife base 304 in FIG. 31 (b). It is formed so as to go downward. The cloth waste cut by the eyelet knife 101b passes through the cloth waste paths 101e and 304a, falls into the boss hole 131a, and is discharged to the outside. In addition, according to the direction of the cloth waste path | route 304a, the cloth guard 306 is provided so that the side surface of the foundation 304 for eyelet knife may surround a hook, and is being fixed to the base board 303a with the setscrew 307,307.
[0160]
The cylinder mounting plate 301 for fixing the air cylinder 310 similar to the air cylinder 110 is a base plate 303a so that it can be adjusted forward and backward by set screws 302, 302 at a position where it does not interfere with the forward / backward movement of the eyelet knife base 304. It is fixed to the upper surface of the.
A threaded portion 310b that is threaded on the outside is fixed to the tip of the rod 310a, and this threaded portion 310b is inserted into the screw hole formed on the rear surface of the eyelet knife base 304 via the nut 305. It is attached by adjusting. Accordingly, in the first modification, the eyelet knife base 304 is moved back and forth in response to the protrusion / disengagement of the rod 310a, and stands up when the air cylinder 310 is off and the rod 310a protrudes (see FIG. 32 (a)), and when the rod 310a is pulled in the ON state, the eyelet knife base 304 is pulled via the screw portion 310b and moves backward.
The front position of the eyelet knife base 304 pushed by the air cylinder 310 is determined by the adjusting screws 115 and 115 provided in the rear part of the block body 303c, as in the first embodiment.
[0161]
The cutting operation performed by the knife unit 300 having the above-described configuration and the flat knife receiver 160 (or the step knife receiver 167) is substantially the same as (1) to (4) described in the first embodiment. The only difference is that the eyelet knife base 304 is retracted by going straight backward.
That is, when cutting the eyelet portion 90, as shown in FIG. 32A, the eyelet knife base 304 is in front, and the flat knife receiver 160, the eyelet knife 101b, and the straight knife 102b are matched. In the case of the step knife receiver 167, only the eyelet knife 101b is matched. The position of the eyelet knife 101b at this time is the first position.
In addition, at the same timing as in the first embodiment, air is supplied to the joints 163 and 141, and cloth waste generated by cutting is discharged from the side surface of the eyelet knife base 304 through the cloth waste paths 101e and 304a. Furthermore, it is sucked by the suction device 134 and discharged.
[0162]
When the straight portion 90 or the sleepy eye hole 94 is formed, as shown in FIG. 32 (b), the eyelet base 304 is retracted backward to a position where it does not interfere with the flat knife receiver 160 (step knife receiver 167), The fabric is cut only by the flat knife receiver 160 (step knife receiver 167) and the straight knife 102b. The position of the eyelet knife 101b at this time is the second position.
[0163]
Even the sewing machine provided with the cloth cutting device having the above knife unit 300 is configured to be able to move the eyelet knife base 304 to which the eyelet knife 101b is fixed, so that the cloth cutting device 201 is provided. Like the sewing machine 200, if the flat knife receiver 160 is used, the eyelet button hole 92 and the sleeper eye hole 94 can be formed in any length. If the stepped knife receiver 167 is used, the eyelet button hole 92 and the sleep eye hole 94 can be formed with any length, and only the eyelet portion 90 can be formed.
[0164]
<Modification 2>
Modification 2 will be described with reference to FIG. In FIG. 33, members identical to those in FIGS.
The cloth cutting device 400 of Modification 2 is configured upside down from the first embodiment, and is provided with a cloth cutting knife 411 on the upper side and a knife receiver on the lower side.
On the upper side, a knife mounting base 410 is fixed to a linear motion shaft 40 that constitutes a cloth cutting driving means similar to the knife receiving driving means 170, and a cloth cutting knife 411 is attached to the knife mounting base 410. On the lower surface of the cloth cutting knife 411, an eyelet knife part 412 formed in a drop shape and a straight knife part 413 formed in a straight line are continuously formed integrally.
[0165]
Inside the knife mounting base 410, a cloth waste passage 410a is formed in the lateral direction, and air is sucked into the cloth waste passage 410a in the direction of arrow C via a joint 418. A cloth chute 416 for collecting cloth waste is fixed via a screw 417 so as to protrude from the tip of the cloth waste path 410a to the outer surface of the knife mounting base 410. The cloth chute 416 is provided with a pipe 414, and a hose 415 is connected to the other end of the pipe 414.
A cloth waste path 410b is formed inside the knife mounting base 410 so as to be connected to the cloth waste path 410a. A cloth waste path 411 a that is continuous with the cloth waste path 410 b is also formed inside the cloth cutting knife 411, and is open at the lower surface of the eyelet knife part 412.
[0166]
The lower knife receiving unit 420 is configured by attaching each member on a knife receiving base 403. The base plate 403 a is provided with a female receiving support 403 b similar to the female support 103 b and a block body 403 c similar to the block 103 c and has substantially the same shape as the female base member 103. However, since the cloth waste is not discharged from the bottom of the knife receiving base 403 in the second modification, the only difference is that the hole for passing the cloth waste is not provided in the knife receiving base plate 403a.
[0167]
On the upper surface of the block body 403c, a linear knife receiver 402 that is aligned with the linear knife portion 413 and has a flat upper surface is fixed. This fixing structure is the same as that of the straight female member 102. In addition, a rectangular parallelepiped recess (not shown) is formed inside the knife receiver support 403b, and the eyelet knife receiver base 404 is fitted into the recess. The eyelet knife receiving base 404 is pivotable by the support shaft 107 with respect to the knife receiving support body 403b by the support shaft 107 and urged counterclockwise in FIG. It is attached in a state. Then, like the eyelet knife base 104, the eyelet knife receiving base 404 is pushed up by the cylinder pin 114 at the tip of the air cylinder 110 and falls down by the link 116 and the spring 108 attached to the cylinder pin 114. It has become.
[0168]
On the upper surface of the eyelet knife receiving base 404 is fixed a eyelet knife receiver 401 that matches the eyelet knife portion 412 and has a flat upper surface. This fixing structure is similar to the eyelet female member 101. The straight knife receiver 402 and the eyelet knife receiver 401 constitute a knife receiver.
An air vertical hole 404 a for allowing air to pass therethrough is formed inside the eyelet knife receiving base 404. Further, a lateral hole (not shown) connected to the air vertical hole 404a is formed on the side surface (opposite the surface visible in FIG. 33) of the eyelet knife receiving base 404, and the air line 406 is not shown in the horizontal hole. It is connected via a joint. Inside the eyelet knife receiver 401, there is formed an air vertical hole 401b that is continuous with the air vertical hole 404a and is open at the upper surface 401a. Therefore, when air is supplied from the air line 406, the air is ejected toward the upper eyelet knife 412 through the air vertical holes 404a and 401b. The cloth waste generated by the formation of the eyelet portion 90 enters the cloth waste paths 411a, 410b, 410a by the air ejected from the air vertical hole 401b, and further toward the cloth chute 416 by the air sucked from the joint 418, The air is discharged out of the sewing machine through the air pipe 414 and the hose 415.
[0169]
In the cutting operation performed by the cloth cutting device 400 having the above-described configuration, the cloth cutting knife 411 moves up and down like the flat knife receiver 160, while the eyelet knife receiver 401 rotates and retracts like the eyelet female member 101. Except for this, 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 in the state shown in FIG. Matches. The position of the eyelet knife receiver 401 at this time is the first position. Further, since cloth waste is generated, air is supplied to the air line 406 and the joint 418, and the cloth waste is discharged out of the sewing machine.
[0170]
When the straight portion 91 or the sleepy eye hole 94 is formed, as shown in FIG. 33B, the eyelet knife receiving base 404 is retracted by rotating counterclockwise, and the cloth cutting knife 411 and the linear knife are retreated. The fabric is cut only by the receiver 402. The position of the eyelet knife receiver 401 at this time is the second position.
Even in the sewing machine provided with the cloth cutting device 400 described above, the eyelet button hole 92 and the sleepy eye hole 94 can be formed with arbitrary lengths, similarly to the sewing machine 200 provided with the cloth cutting device 201. .
Further, if a step is provided so that the upper surface 401a of the eyelet knife receiver 401 is located higher than the upper surface 402a of the linear knife receiver 402, the eyelet button hole 92 and the sleeper eye hole 94 can be freely lengthened. In addition, only the eyelet portion 90 can be formed.
[0171]
<Modification 3>
Modification 3 will be described with reference to FIG. In FIG. 34, members identical to those in FIGS.
The female base member 503 in the female unit 500 in the modified example 3 has a flat base plate 503a, and a semicircular semi-disc portion 503b is erected on the base plate 503a. A fulcrum shaft 505 passes through the center of the semicircular disk portion 503b, and a rotating knife base 504 is attached so as to be rotatably supported by the fulcrum shaft 505.
The rotating knife base 504 is a block-like member formed so as to be bent in the middle. The eyelet female member 501 is fixed to the rear upper surface with the bent portion 504a as a boundary, and the linear female member 502 is fixed to the front upper surface. Has been. The fixing structure of these knives is the same as that of the first embodiment.
[0172]
A drop-shaped eyelet knife 501b is formed on the upper edge of the eyelet female member 501, and a cloth waste path 501a is formed on the inner side. A linear straight knife 502 b is formed on the upper surface of the linear knife member 502.
Stoppers 519 and 519 are fixed to the side surface of the rotating knife base 504 via screws 520 and 520, and the eyelet female member 501 and the straight female member 502 are positioned rearward by the stoppers 519 and 519, respectively. ing.
[0173]
The rotating knife base 504 is formed with a cloth waste path 504d which is continuous with the cloth waste path 501a and is formed to be obliquely rearward and downward. The cloth waste discharged from the cloth waste path 504d is directed to the outside of the sewing machine through the boss hole 131a in the base plate 503a, as in the first embodiment. A cloth guard 508 is screwed on the base plate 503a.
Two triangular cams, a first triangular cam 504b and a second triangular cam 504c, are provided on the lower surface of the rotating knife base 504, while the upper surface of the base plate 503a is in contact with the triangular cams 504b and 504c. A movable cam 517a configured to be movable back and forth is provided at a position where it can come into contact.
[0174]
The air cylinder 110 is fixed by cylinder screws 112 and 112 to a cylinder mounting plate 511 fixed to the base plate 503 a by set screws 518 and 518. A rod fixing plate 515 is fixed to the rod 110 a of the air cylinder 110 by 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 portion of the right portion (upward in FIG. 34A), and is fixed to the cylinder mounting plate 511 in this hole. The stopper shaft 512 is inserted. A stopper 513 is attached to the tip of the stopper shaft 512. A cam fixing plate 515a extends from the lower part of the right part so as to be directed forward. A cam support 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.
[0175]
The operation of the female unit 500 having the above configuration will be described. FIG. 34 shows a state in which the rod 110a is retracted, the first triangular cam 504b rides on the upper edge of the moving cam 517a, the eyelet female member 501 stands, and the linear female member 502 tilts obliquely. At this time, the eyelet knife 501b is located at the first position which is the cloth cutting position, and the straight knife 502b is located at the second position where the cloth cutting is impossible. Therefore, if the knife receiver descends from above in this state, only the eyelet portion 90 is formed.
[0176]
When the rod 110a protrudes from this state, as the rod fixing plate 515 advances while being guided by the stopper shaft 512, the cam fixing plate 515a advances, whereby the cam support portion 517 and the moving cam 517a advance.
The moving cam 517a moves away from the first triangular cam 504b by advancement, and eventually comes into contact with the second triangular cam 504c, and rotates the rotating knife base 504 in the counterclockwise direction of FIG. Finally, the second triangular cam 504c rides on the moving cam 517a, the eyelet female member 501 tilts obliquely, and the linear female member 502 stands up. At this time, the straight knife 502b is located at the first position as the cloth cutting position, and the eyelet knife 501b is located at the second position where the cloth cannot be cut. Therefore, if the knife receiver descends from above in this state, a straight portion 91 and a sleep eye hole 94 are formed. The forward movement of the moving cam 517a stops when the rod fixing plate 515 contacts the stopper 513.
When the rod 110a is retracted again from this state, the rotating knife base 504 returns to the state of FIG. 34 while rotating clockwise with the movement of the moving cam 517a.
[0177]
If the sewing machine is provided with the above knife unit 500, the eyelet female member 501 and the straight female member 502 can be alternately moved between the first position and the second position by the rotating knife base 504. Accordingly, the eyelet button hole 92 and the sleep eye hole 94 can be formed in any length, and only the eyelet portion 90 can be formed.
[0178]
In each of the second embodiment and its modification, the retraction direction of the knife or knife receiver that moves between the first position and the second position is not limited to the front-rear direction, and may be the horizontal direction. In addition, the specific mechanism of evacuation can be changed as appropriate. Further, the positional relationship between the knife receiver and the knife may be switched.
[0186]
【The invention's effect】
  Claim1In the cloth cutting knife, at least one of the eyelet knife part and the linear knife part is matched with the knife receiver by the moving means, and the first position is capable of cutting the sewing product. The second position that does not match the knife receiver can be moved. Thereby, various button holes can be formed. For example, when the knife receiver is a type in which the eyelet knife receiving portion and the straight knife receiving portion are formed flat and only the eyelet knife portion moves by the moving means, when the eyelet knife portion is in the first position, An eyelet button hole is formed, and when it is in the second position, a straight button hole (sleep eye hole) can be formed. In addition, when only the straight knife part moves, a button eye button hole can be formed when the straight knife part is in the first position, and only the eyelet part can be formed when it is in the second position. it can. If both are movable, three types of eyelet buttonholes, sleepy eyeholes, and eyelet portions can be formed. Therefore, various button holes can be formed without replacing the cloth cutting knife.
[0187]
  Claim8According to the invention described in the above, at least one of the eyelet knife receiving portion and the straight knife receiving portion is matched with the cloth cutting knife by the moving means among the knife receivers, and a first position capable of cutting the workpiece. A second position that does not match the cloth cutting knife can be moved. Thereby, various button holes can be formed. For example, if the cloth cutting knife is a type in which the eyelet knife part and the straight knife part are formed almost flat and only the eyelet knife receiving part moves, the eyelet button is displayed when the eyelet knife receiving part is in the first position. A hole is formed, and when it is in the second position, a straight button hole (sleeping hole) can be formed. In addition, when only the straight knife receiving part moves, the eyelet button hole can be formed when the linear knife receiving part is at the first position, and only the eyelet part can be formed when the linear knife receiving part is at the second position. it can. If both are movable, three types of eyelet buttonholes, sleepy eyeholes, and eyelet portions can be formed. Therefore, various button holes can be formed without exchanging the knife receiver.
[0188]
  Claims10According to the claim1Or claims8In addition to the effects of the invention described above, it is possible to cut the cloth cutting means while moving the cloth cutting means relative to the workpiece without changing the knife receiver. Can be formed.
[Brief description of the drawings]
FIG. 1 is a side view showing the structure of a sewing machine according to a first embodiment in a partially broken state.
FIG. 2 is a front view showing the structure of the sewing machine according to the first embodiment in a partially broken state.
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.
FIGS. 5A and 5B are a side view and a front view showing a structure of a cloth cutting knife and a knife receiver, respectively.
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. It is drawing (a) which shows the data corresponding to (b).
FIG. 9A is a diagram showing the shape of a stitched seam formed in an eyelet buttonhole, FIG. 9B is a diagram showing a data table, and FIG. 9C is a diagram showing the shape of a stitched seam formed in a sleeper buttonhole. ).
FIG. 10 is a diagram showing memory switch data.
FIG. 11 is a diagram showing an operation panel.
FIG. 12 is a flowchart showing a flow of buttonhole stitch formation 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 cloth cutting knife operation.
FIG. 16 is a drawing showing a method for calculating a knife dropping position.
FIG. 17 is a perspective view (a) showing the structure of the cloth cutting knife and a perspective view (b) showing the structure of the knife receiver.
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 a female unit provided in the sewing machine of FIG. 18. FIG.
21 is a side view showing the female unit of FIG. 20 and a suction device connected to the female unit, partially broken away.
22 is a side view showing the operation of the cloth cutting device having the knife unit of FIG. 20, in which (a) shows a state where the eyelet female member is raised, and (b) shows a state where the eyelet female member is tilted. Show.
23 is a side view showing the operation of the cloth cutting apparatus having the knife unit of FIG. 20 and using the step knife receiver as the knife receiver, wherein (a) is a state in which the eyelet female member is raised; ) Shows a state where the eyelet female member has fallen.
24 is a diagram for explaining step by step how the eyelet buttonhole is formed during the operation of FIG. 22;
FIG. 25 is a diagram for step by step explaining how to form a sleep eye hole during the operation of FIG. 22 or FIG. 23;
26 is a diagram for explaining step by step how the eyelet buttonhole is formed during the operation of FIG. 23;
FIG. 27 is a block diagram showing a control device of the sewing machine of 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 view schematically showing four cloth cutting patterns in the sewing machine cloth cutting apparatus of FIG. 18; FIG.
31A and 31B are views showing a female unit as a first modification of the second embodiment, wherein FIG. 31A is a plan view from above, and FIG. 31B 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, wherein (a) shows a state where the eyelet female member is moving forward, and (b) shows that the straight female member is retracted. Indicates the state.
FIGS. 33A and 33B are diagrams showing a cloth cutting device as a second modification of the second embodiment, in which FIG. 33A is a state in which the knife receiver is raised and FIG. 33B is a state in which the knife receiver is collapsed and retracted; Indicates.
34A and 34B are views showing a female unit as a third modification of the second embodiment, wherein FIG. 34A is a plan view from above, and FIG. 34B is a side view.
FIG. 35 is a diagram showing conventional pattern data.
FIG. It is drawing (a)-(d) which shows the data corresponding to this.
[Explanation of symbols]
10 Sewing machine
50 Sewing machine control device
52 Memory means (RAM)
53 Memory means (EEPROM)
59 Changing means (operation panel)
60 Cloth cutting means
61 Cloth cutting knife
61a Eyelet female section
61b Straight female part
62 Female receptacle
90 Eyelet
91 Straight section
92 Eyelet buttonhole
93 Straight hole
14 Feeding base (relative movement means)
100 female unit
101 Eyelet female member
101b Eyelet female
101e Cloth path
102 Female member for straight line
102b Straight knife
103 female base
104 Foundation for eyelet female
104a Cloth path
107 fulcrum shaft
108 Spring (moving means)
110 Air cylinder (moving means)
114 Cylinder pin
116 links
122 Cloth guard
134 Aspirator
160 Flat knife receptacle
167 Step female receptacle
170 knife receiving drive means (cloth cutting drive means)
180 Controller
200 sewing machines
201 Cloth cutting device
300 female unit
303 female base material
304 Foundation for eyelet female
304a Cloth path
400 Cloth cutting device
401 Female eyelet
402 Straight female receptacle
403 female receiving base
404 Foundation for eyelet female
410 Female mounting base
411 Cloth cutting knife
412 Eyelet female part
413 Straight knife part
416 Cloth chute
420 Female receiving unit
500 female units
501 Female member for eyelet
501a Cloth path
501b Eyelet female
502 Female member for straight line
502b Straight knife
503 Female base material
504 Rotating knife base
504b First triangular cam
504c Second triangular cam
504d Cloth waste path
517a Moving cam

Claims (10)

It is provided in a sewing machine that forms a button hole in the sewing object and forms a seam around the button hole.
A cloth cutting knife having a eyelet female part forming the eyelet part of the eyelet button hole comprising a eyelet part and a straight part, and a straight knife part forming the straight part, and facing the cloth cutting knife vertically A cloth cutting means comprising: a piglet knife receiving portion that is disposed and matches the eyelet knife portion; and a knife receiver having a straight knife receiving portion that matches the linear knife portion;
A cloth cutting drive means for driving one up and down so that the cloth cutting knife and the knife receiver come in contact with and apart from each other;
The cloth cutting means is a cloth cutting device for a sewing machine that forms a button hole by cutting a workpiece when a cloth cutting knife and a knife receiver are in contact with each other.
At least one of the eyelet knife part and the linear knife part of the cloth cutting knife takes a first position that matches the knife receiver and can cut the sewing product, and a second position that does not match the knife receiver. Is configured to be movable and
Sewing machine cloth cutting characterized by comprising a moving means for moving between the first position and the second position of the eyelet knife section and the linear knife section taking the first position and the second position. apparatus. The sewing machine cloth cutting device according to claim 1 ,
As the knife receiver, there is a step so that 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 linear knife receiving portion are formed on different horizontal surfaces. A sewing machine cloth cutting device characterized in that it can be attached to both of the stepped female receptacles, and any one of them is attached. A cloth cutting device for a sewing machine according to claim 2 ,
Comprising storage means for storing a plurality of control data for forming buttonholes and hole stitches;
The control data includes the formation of an eyelet button hole with a flat knife receiver and a cloth cutting knife, and the formation of a straight hole with only the flat knife holder or the step knife holder and the straight knife portion of the cloth cutting knife. , Hole type selection data for selecting either the formation of the eyelet button hole by the step knife receiver and the cloth cutting knife, or the formation of the eyelet part by only the step knife receiver and the eyelet knife part,
A cloth cutting device for a sewing machine comprising: control means for controlling and driving the cloth cutting driving means and the moving means at a predetermined timing so as to form a hole selected by the hole type selection data. The sewing machine cloth cutting device according to claim 1 ,
The eyelet knife section is fixed with respect to the eyelet knife base and moves between the first position and the second position by rotating the eyelet knife base. . The sewing machine cloth cutting device according to claim 1 ,
The eyelet knife part is fixed to the eyelet knife base, and the eyelet knife base slides linearly to move between the first position and the second position. Cloth cutting device. The cloth cutting device for a sewing machine according to claim 1 , wherein both the eyelet knife section and the straight knife section are fixed to the cloth cutting knife base, and the cloth cutting knife base is rotated to rotate the eyelet knife section and the straight knife section. A sewing machine cloth cutting device, wherein a knife part alternately moves between the first position and the second position. The sewing machine cloth cutting device according to claim 1 ,
The eyelet knife portion is fixed to the eyelet knife base, and is configured to move between the first position and the second position in accordance with the movement of the eyelet knife base,
To collect the eyelet-shaped cloth scraps formed by the eyelet knife part and the eyelet knife receiving part matching the eyelet knife part and the eyelet knife receiving part from the inside to the outside of the eyelet knife part and the eyelet knife base. Is formed in a direction that does not block the movement of the eyelet knife part,
The cloth cutting device for a sewing machine is configured such that the cloth waste passing through the cloth waste path is connected to a suction device and discharged into a pipe not connected to the cloth waste path. It is provided in a sewing machine that forms a button hole in the sewing object and forms a seam around the button hole.
A cloth cutting knife having a eyelet female part forming the eyelet part of the eyelet button hole comprising a eyelet part and a straight part, and a straight knife part forming the straight part, and facing the cloth cutting knife vertically A cloth cutting means comprising: a piglet knife receiving portion that is disposed and matches the eyelet knife portion; and a knife receiver having a straight knife receiving portion that matches the linear knife portion;
A cloth cutting drive means for driving one up and down so that the cloth cutting knife and the knife receiver come in contact with and apart from each other;
The cloth cutting means is a cloth cutting device for a sewing machine that forms a button hole by cutting a workpiece when a cloth cutting knife and a knife receiver are in contact with each other.
At least one of the eyelet knife receiving portion and the linear knife receiving portion of the knife receiver matches the cloth cutting knife and can cut a sewing product, and the second position does not match the cloth cutting knife. It is configured to be movable to take
A sewing cloth comprising a moving means for moving between the first position and the second position of the eyelet knife receiving part and the linear knife receiving part taking the first position and the second position. Cutting device. The sewing machine cloth cutting device according to claim 8 ,
The eyelet knife receiving portion is fixed to the eyelet knife receiving base, and moves between the first position and the second position by rotating the eyelet knife receiving base. Cloth cutting device. The cloth cutting device for a sewing machine according to claim 1 or 8 ,
Relative movement means is provided that allows the cloth cutting means to move relative to the sewing product in a direction parallel to the straight portion of the eyelet button hole formed in the sewing product. Sewing machine cloth cutting device.

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