JPS649036B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention moves the fabric to be sewn and the metal button relative to the needle based on stitch length data stored in a storage device in advance, and moves the metal button to the fabric to be sewn. This invention relates to a sewing machine with an electronic button that can be sewn using hand-stitched stitches.

[Prior art]

Conventionally, this type of button-equipped sewing machine was produced in 1963.
-6869 is known. This sewing machine sews metal buttons onto the fabric to be sewn in a hand-sewn style, and this sewing machine uses a cam to drive the button and the fabric to be sewn in the X-Y direction.

[Problem that the invention seeks to solve]

For this reason, as shown in FIG. 9, the shank part S of the metal button B and the connecting thread ring _L1 and connecting thread ring _L2 sewn in a "V" shape on the sewing material W side are connected to the sewing material W side. Length X cannot be varied. metal button B
The length X is longer than the length Sl of the bottom of the shank portion S
If the length is not long, when the metal button B is sewn onto the fabric W, there is a problem that it will not be stable, the button B will lie down, and it will not be possible to attach it beautifully, reducing the product value.

In addition, in order to wrap the thread ring around the connecting thread ring L ₁ and the connecting thread ring L ₂ again, so-called root wrapping, it is best to sew the connecting thread ring L ₁ and the connecting thread ring L ₂ so that they are parallel to each other. , there was a problem in that it was not possible to deal with this case as well.

In addition, since the stitch length of the connecting thread rings L ₁ and L ₂ cannot be changed depending on the size of the shank part S of the metal button B, if the size of the shank part S is small, the needle will not fit inside the shank part S. There was a problem that the needle could not be inserted and came into contact with the shank portion S, resulting in breakage of the needle.

[Means for solving problems]

The present invention has been made in view of these problems, and is intended to solve the problems by driving a sewing material holding means based on preset stitch length data.

〔Example〕

Next, the configuration of an embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view of the needle bar up and down mechanism of the present invention.

In the figure, reference numeral 1 denotes an upper looper shaft rotatably supported on the machine frame 2, to which an upper looper 1l is fixed.
3 is a first cam body for driving a disk-shaped upper needle bar fixed to the right end of the upper looper shaft 1 with a screw 4;
A cam groove 5 is formed.

6 is an upper needle bar drive shaft rotatably supported on the machine frame 2; 7 is a first needle bar drive shaft fixedly supported on the right end of the upper needle bar drive shaft 6 and having a roller 7A at its tip that fits into the first cam groove 5; A follower 8 is an upper needle bar crank arm fixed to the left end of the upper needle bar drive shaft 6, and a square hook 8A is supported at the tip.

9 is an upper needle bar supported vertically movably on machine frames 10A and 10B; 11 is fixed to the upper needle bar 9 at one end, and forms a slide portion 11A having a U-shaped cross section that loosely fits into the square hook 8A at the other end; It is made with a needle bar.

Reference numeral 12 designates a check operating rod for the needle N which is inserted into the upper needle bar 9 as is well known, and has an adjustment screw 13 screwed into its upper end. In FIG. 1, when the upper needle bar 9 descends and the lower end of the adjusting screw 13 comes into contact with the upper surface of the bearing metal 10a of the machine frame 10A, only the upper needle bar 9 descends and the chuck of the needle N built in the upper needle bar 9 is removed. (not shown) releases the holding of the loose needle N and passes it to the chuck of the lower needle bar, which will be described later.

Next, the drive mechanism of the lower needle bar will be explained.

14 is a lower looper shaft rotatably supported on the lower machine frame 15, a pulley 16 on which a belt V connected to a drive motor (not shown) is wound is fixedly supported on the right end, and a pulley 16 with a tip at the left end is fixedly supported. A lower looper arm 17 supporting a sword tip 17A is fixed.

Reference numeral 18 denotes a disk-shaped second cam body for driving a lower needle bar, which will be described later, which is fixed to the right end of the lower looper shaft 14 with a screw 19, and a second cam groove 20 is formed around the periphery.

21 is a lower needle bar drive shaft rotatably supported on the machine frame 15; 22 is a roller 22A that is fixedly supported on the right end of the lower needle bar drive shaft 21 and that fits into the second cam groove 20 at the tip.
The second follower 23 is a lower needle bar crank arm fixed to the left end of the lower needle bar drive shaft 21, and a square hook 23A is supported at the tip.

24 is a lower needle bar supported by machine frames 25A and 25B so as to be movable up and down; 26 is fixed to the lower needle bar 24 at one end, and forms a slide portion 26A having a U-shaped cross section that is loosely fitted to the square piece 23A at the other end. It uses a lower needle bar.

27 is a check operating rod for the needle N which is inserted into the lower needle bar 24 as is well known, and an adjustment screw 28 is screwed into the upper end thereof. In Fig. 1, lower needle bar 2
4 rises and the upper end of the adjustment screw 28 comes into contact with the lower surface of the bearing metal 25b of the machine frame 25B, only the lower needle bar 24 rises, and the known chuck (not shown) of the needle N built in the lower needle bar 24 is released. The holding of the offset needle N is released and it is passed to the chuck of the upper needle bar 9 mentioned above.

Pulleys 29 and 30 are fixedly supported on the upper looper shaft 1 and the lower looper shaft 14, respectively. A belt 31 is suspended between the pulleys 29 and 30, and the power of a drive motor (not shown) is transferred to the upper looper shaft. 1.

Next, the driving means will be explained.

FIG. 2 is a perspective view showing the driving means 32A.

In the same figure, 32 and 33 are two parallel slide rods fixed to the machine frame K of the sewing machine, and 33 is a Y slideably supported by the Y direction slide rods 32 and 32.
A direction moving table 34 is supported by the machine frame K, and a threaded portion 35 formed on the rotating shaft 34a is screwed into the Y direction moving table 33.
This is a Y direction drive motor.

Reference numerals 36 and 36 denote X-direction slide rods supported on the Y-direction moving table 33 perpendicular to the slide rods 32, 32, and 37 denotes an X-direction moving table slidably supported on the X-direction slide rods 36 and 36. Reference numeral 38 denotes an X-direction drive motor that is supported on the Y-direction moving table 33 and has a screw portion 39 formed on a rotating shaft 38a screwed into the X-direction moving table.

Next, the sewing material holding means will be explained.

3 and 4 show the cloth holding means 40. As shown in FIG. In the figure, 37 is the X-direction drive stand shown in FIG. 41 is a base fixed on the X-direction drive base 37, 42 is a first movable body that movably supports the upper surface of the base 41 by rollers 43, and the upper part has a U-shaped notch at the tip. A cloth retaining plate 45 having 44 is fixed. A spring 46 is interposed between the first movable body 42 and an upright plate 41a provided upright at the end of the base 41, and acts to move the first movable body 42 in the direction of the upright plate 41a. 4
Reference numeral 7 denotes a second movable body disposed on the top surface of the base 41 in front of the first movable body 42, which moves on the top surface of the base 41 by rollers 48, and has a U-shaped notch at the tip. A cloth clamping plate 50 having a portion 49 is fixed thereto.

A cutout portion 51 is provided at the bottom of the second moving body 47.
is formed, and the base 4 is formed in this notch 51.
A stop table 52 fixed to the second
The movement of the moving body 47 is restricted. Reference numeral 53 denotes a pressing rod slidably supported inside the stop table 52 via a spring 54, and the spring 54 normally presses the second moving body 47 away from a chuck mechanism to be described later.

Reference numeral 55 denotes a locking arm rotatably supported on the base 41, and an engaging portion 55a that engages with a roller 56 provided by extending the rotation shaft 43a of the roller 43 of the first moving body 42.
have.

An operating arm 57 is rotatably supported on the base 41, and is normally rotated by a spring 58 in a direction that moves the locking arm 55 clockwise. 57L is a lever of the operating arm 57.

Next, the chuck mechanism will be explained.

FIG. 5 shows a chuck mechanism 59 of the present invention. 60 is a fixed arm extending from the base 41 as shown in FIG.
1 is fixed. 62 is a left claw that is slidably supported on the top of the board 61, and 63 is a right claw that is slidably supported on the bottom of the board 61. These left claw 62 and right claw 63 are rotatably supported on the board 61. rotating arm 64
The upper and lower ends of the arm 64 are engaged with each other, and the arm 64 is opened and closed by the rotation of the rotary arm 64. Left claw 62, right claw 63
A triangular recess 65 and flat parts 66 provided at both ends of the recess 65 are formed symmetrically on the opposing surfaces of the metal button B, respectively, so as to correspond to the size of the shank portion S of the metal button B.

FIG. 6 shows an operation panel 69 equipped with a keyboard 67 for issuing predetermined commands to the button-equipped sewing machine and a display panel 68 for displaying operation results. To explain the key buttons of the keyboard 67 that are related to the present application, 70 is a neck wrapping selection key 71 for determining whether or not to perform "neck wrapping" on the shank portion of metal button B. Metal button B is the button to be sutured. A metal button selection key 72 is used to set the number of turns of the connecting thread ring L ₁ L ₂ that connects the shank portion S of the metal button B and the material to be sewn. 73 is a button for setting the number of stitches to be sewn. Sew so that the thread passing through the fabric W is exposed on the back side of the fabric W,
A power thread number setting key 74 is used to set the number of power thread stitches for firmly sewing the button B and the cloth W to be sewn, and a neck wrapping stitch number setting key 74 is used to set the number of neck wrapping stitches.

As shown in FIG. 7, 75 is a second stitch length key for setting the second stitch length X, which is the width of the needle drop position N ₁ N ₂ on the cloth W to be sewn.

76 is a first stitch length for setting the first _stitch length Y, which is the gap between the needle drop position _N3 in the shank portion S of the metal button B and the needle drop position _N1N2 in the sewing material W. That's the key.

Reference numeral 77 is a force thread length dimension key for setting the gap S from the needle drop position N ₁ N ₂ on the workpiece cloth W to the needle drop position N ₄ of the force thread when applying the force thread.

Note that 78 is a key for setting the needle drop position _N3 in the shank portion S of the metal button B, and sets the distance H from the bottom of the metal button B to the center of the shank portion S.

79 is a setting switch when performing power thread;
80 is a group of numerical keys from "0" to "9".

The display panel 68 also includes numeric display sections 81, 82, 83, 84, which display numeric values corresponding to the keys.
It consists of 85, 86, and 87.

Next, in FIG.
A keyboard 67, a display panel 68, first and second storage means 88, 89, and drive motors M for the upper and lower needle bars 9, 24 are connected to a central processing unit 90.

The first and second storage means 88 and 89 are for storing data on the first stitch length and data on the second stitch length.

Next, the operation of this invention will be explained.

The fabric W to be sewn is bent and wrapped around the fabric holding plate 45 as shown in FIGS. 1 and 4, and then the first moving body 42 shown in FIG. The cloth W to be sewn is clamped between the sewing machine and the sewing machine 50. At this time, as the first moving body 42 moves, the second moving body 47 also moves in the direction of the chuck mechanism 59, and the cloth W to be sewn is set. At this time, the engaging portion 55a of the locking arm 55
6 to prevent the first moving body 42 from returning. Then, the metal button B is attached to the chuck mechanism 59 by a known transfer device (not shown) as shown in FIGS. 1 and 4.

Next, instructions for sewing data for metal button B will be described.

After turning on the power, press the metal button selection key 71. Next, press the key 78 to set the needle drop position _N3 in the shank part S according to the size of the shank part S of the metal button B, and set its size H, for example 1.0.
In the case of mm, when the numerical keys "1" and "0" are pressed, "1" and "0" are displayed on the display section 87.

Next, in order to set the length of the buttoned thread, the first
Press the stitch length key 76 and then select "3", for example.
When "0" and the numerical key are pressed, "3" and "0" are displayed on the display section 85, and the Y dimension in FIG. 7 is set to 3.0 mm. To set the number of thread turns for this first stitch, press the button-equipped stitch number setting key 72 and press the numeric key, for example, "3".
When the button is pressed, "3" is entered on the display section 81 and the number of windings is set to three.

To set the second stitch length data, first
When the stitch length key 75 is pressed and the numerical keys are pressed, for example, "3" and "0", "3" and "0" are displayed on the display section 84, and the X dimension in FIG. 7 is set to 3.0 mm.

In addition, in Fig. 7, to set the power thread dimension S, press the power thread setting switch 79, press the power thread length dimension key 77, and press the numerical keys "2" and "0" to set the S dimension. is set to 2.0 mm and displayed on the display section 86. Further, the number of force threads is displayed on the display section 82 by pressing the force thread number setting key 73 and pressing the numeric key.

Also, to perform neck wrapping, press the neck wrapping selection key 70, then press the number of neck wrapping stitches setting key 74, set the number of neck wrappings to 2, for example, and press the numeric key "2". is displayed.

Incidentally, the dimension R of the neck wrapping position is determined by adjusting a dimension setting dial (not shown).

After completing the above operations, when the start button is pressed, the CPU 90 supplies drive command signals to the drive motor M, the X-direction drive motor 38, and the Y-direction drive motor 34. Then, first, the needle drop is repeated at N ₁ N ₃ by the number of buttoned stitches, and then the needle drop is repeated at N ₃ N ₂ by the number of buttoned stitches to form a buttoned stitch. Next, _{the needle drops from the needle drop point N3 to N4, and N3N4 is repeated for} the number of force thread stitches to form a force thread stitch and sew the fabric W button B. After that, a needle drop is made at _N3 , then a needle drop is _made at _N5N6 by the number of neck wrapping stitches, the neck wrapping is sewn, and finally a needle drop is made at _N1 , and the process is completed.

〔Effect of the invention〕

As described above, according to the present invention, the sewing dimensions of the metal button can be freely changed.
The optimum seam can be formed regardless of the size of the metal button, allowing the metal button to stand up and be sewn onto the fabric being sewn, and also preventing the risk of needle breakage. There is.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of essential parts of the present invention, FIG. 2 is a perspective view of the driving means of the present invention, FIG. 3 is a perspective view of the means for holding the fabric to be sewn, and FIG. 4 is a front view of the means for holding the fabric to be sewn. ,
Figure 5 is a front view of the chuck mechanism, Figure 6 is a front view of the operation panel, Figure 7 is an explanatory diagram of the button sewing state,
FIG. 8 is a block diagram of the control mechanism of this invention. 9... Upper needle bar, 32A... Drive means, 24...
Lower needle bar, 88...first storage means, N...needle, 76
...First stitch length key, W...Sewn fabric, 75...
Second stitch length key, 40...Sewn fabric holding means, 9
0...Central processing unit, 59...Chuck mechanism, B...Metal button, S...Metal button B
Shyank part.

Claims (1)

[Scope of Claims] 1. An upper needle bar and a lower needle bar that are arranged to face each other in the vertical direction and move up and down in conjunction with a drive motor; a needle that moves between the upper needle bar and the lower needle bar; and a fabric to be sewn. a chuck mechanism for holding a metal button connected to the sewing material holding means; and a chuck mechanism for changing the relative positions of the needle, the sewing material and the metal button. In a button sewing machine consisting of a device and a driving means for driving a sewing material holding means, the first stitch length data, which is the difference between the needle drop position in the shank portion of the metal button and the needle drop position in the sewing material, is obtained. A first memory means for storing the information, and a second memory means for storing the deviation of the needle drop position on the fabric to be sewn.
A second storage means for storing stitch length data; a first stitch length key for inputting first stitch length data into the first storage means; and inputting second stitch length data into the second storage means. outputs a drive signal to the drive means in synchronization with the upper and lower needle bars based on the second stitch length key and the stitch length data retrieved from the first storage means and the second storage means; A sewing machine with an electronic button, characterized in that it is equipped with a central processing unit that operates a chuck mechanism to form a seam between the shank portion of the metal button and the fabric to be sewn.