JPH0141349B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention moves the cloth to be sewn and the button relative to the needle based on positional data regarding the buttonhole in a button with a hole stored in a storage device in advance, and presses the button. This invention relates to a sewing machine with a button that can be sewn onto a cloth to be sewn using hand-stitched stitches.

[Prior art]

Conventionally, this type of button-equipped sewing machine
-The one shown in No. 13643 is known. This sewing machine sews buttons with four holes or two holes onto the fabric to be sewn in a hand-stitched manner, and then sews the seam around the sewn thread again, which is called neck wrapping. When activated, the button and the cloth to be sewn are driven in the X-Y direction.

[Problem that the invention seeks to solve]

For this reason, it is only possible to sew a button sewing pattern of either a two-hole button or a four-hole button, and the problem arises in that the cam must be replaced in order to sew.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and its object is to solve the above-mentioned problems by driving the sewing material holding means based on preset position data regarding buttonholes.

〔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.
Reference numeral 3 denotes a first cam body for driving a disc-shaped upper needle bar screwed to the right end of the upper looper shaft 1, and a first cam groove 5 is formed around the periphery.

6 is an upper needle bar drive shaft rotatably supported on the machine frame 2; 7 is fixedly supported on the right end of the upper needle bar drive shaft 6; 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 contained 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 piece 23A is supported at the tip.

24 is a lower needle bar supported vertically movably on machine frames 25A and 26B; 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 loosely fits into 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.

29 and 30 are pulleys fixedly supported on the looper shaft 1 and the lower looper shaft 14, respectively;
A belt 31 is suspended between 9 and 30, and transmits power from a drive motor (not shown) 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 figure, 32 is two parallel slide rods fixed to the machine frame K of the sewing machine, 33 is a Y-direction moving table slidably supported on the Y-direction slide rods 32, 32, and 34 is supported on the machine frame K. This is a Y-direction drive motor in which a radio portion 35 formed on a rotary shaft 34a is screwed into a Y-direction moving table 33.

Reference numerals 36 and 36 denote an X-direction slide bar supported perpendicularly to the slide rods 32 and 32 by a Y-direction moving table 33, and 37 an X-direction moving table slidably supported by the Y-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 37.

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. Cloth retaining plate 45 with 44
is fixed. This first moving body 42 and base 41
A spring 46 that acts to move the first moving body 42 in the direction of the upright plate 41a is interposed between the first movable body 42 and the upright plate 41a erected at the end of the first moving body 42 .

Reference numeral 47 denotes a second movable body disposed on the upper surface of the base 41 in front of the first movable body 42, and the base 4 is moved by rollers 48.
1 It is designed to move on the top surface, and there is a U at the tip.
A cloth clamping plate 50 having a letter-shaped notch 49 is fixed.

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.

55 is a locking arm rotatably supported on the base 41, and has 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. .

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 rotatably supports it. 62 is a left claw slidably supported on the top of the board 61; 63 is the board 61;
These left claws 6 are slidably supported at the bottom of the right claw.
2. The right claw 63 engages with the upper and lower ends of a rotating arm 64 rotatably supported on the base plate 61, and is opened and closed by the rotation of the rotating arm 64.

A curved portion 65 having a shape that matches the button B is formed symmetrically on the opposing surfaces of the left claw 62 and the right claw 63, respectively.

A gear 66 is fixed to the other end of the rotating shaft 61A of the base plate 61, as shown in FIG.

Reference numeral 67 denotes a fan-shaped gear rotatably supported by a shaft 68 on the fixed arm 60, and an air cylinder 70 fixed to the machine frame via a link 69 is provided at the other end.

The chuck mechanism 59 is rotated from a vertical position to a horizontal position by the operation of the air cylinder 70.

FIG. 6 shows an operation panel 73 equipped with a keyboard 71 for issuing predetermined commands to the button-equipped sewing machine and a display panel 72 for displaying operation results.

To explain the parts of the keyboard 71 that are relevant to the present application, 74 is a neck wrapping selection key for determining whether or not to perform "neck wrapping" on the buttoned seam part of button B;
5, 76, and 77 are keys for selecting the number of buttonholes and buttonhole sewing pattern; 75 is the first four-hole button selection when forming a parallel stitch pattern button sewing stitch with a four-hole button; The key 76 is a four-hole button, and the second four-hole button selection key 77 is used to select a sewing pattern when sewing a two-hole button. This is a two-hole button selection key.

Reference numeral 78 is a button-attached stitch number setting key for setting the number of stitches connecting the button B and the material to be sewn W, and 79 is a key for setting the number of stitches with a button so that the thread passing through the material to be sewn W pierces the material to be sewn and appears on the back side. This is a power thread number setting key for setting the number of power thread stitches to firmly sew the button B and the cloth W to be sewn.

Reference numeral 80 is a neck wrapping stitch number setting key for setting the number of wraps for the above-mentioned "neck wrapping".

81 is an X dimension specification key for specifying the dimension X of the buttonhole BH, as shown in FIG. As shown in Figure 7B, specify the dimension S from the lower buttonhole HB. This force thread 84 is used to firmly attach the button B and the fabric W to be sewn at a seam formed at the needle drop point H6 between the button B and the fabric W to be sewn, as shown in FIG. It is.

Numeric keys 85 are used to input each dimension.

In FIG. 9, 86 is a central processing unit;
X direction drive motor 38, Y direction drive motor 34,
A drive motor M for driving the upper and lower needle bars is connected.

Reference numeral 87 denotes a storage means which is connected to the central processing unit 86 and stores in advance pattern data constituting the sewing shape of the buttonhole based on a large number of position data regarding the buttonhole.

Next, the operation of this invention will be explained.

In the above configuration, a case where cross stitching is performed using a four-hole button will be described.

First, after turning on the power, the second four-hole button selection key 76 is pressed. Next, in order to specify the buttonhole dimensions X and Y, first press the X dimension specification key 81, then press the numerical keys of the numerical key group 85, for example, "3" and "0", and the display section 86 will show "3" and "0". is displayed and the X dimension is
Set to 3.0mm.

Similarly, the Y dimension is set to 3.0 mm by pressing the Y dimension designation key 82 and numerical key group 85. This numerical value is displayed on the display section 82A.

Next, in order to set the number of turns of the buttoned thread, the number of buttoned stitches setting key 78 is pressed and the numerical key 85 is pressed, for example, "3", and "3" is displayed on the display section 88.

Here, if the neck wrapping thread 90 (see Figure 8) is required, press the neck wrapping selection key 74, press the neck wrapping stitch number setting key 80 to set the number of neck wrappings, and press the value key 85, for example, " When the user presses "4", "4" is displayed on the display section 91.

The needle drop position when performing neck wrapping is set based on the upper buttonhole position in FIG. 7A, and is set in advance by a neck wrapping position setting dial (not shown).

If power thread is required, the user presses the power thread button 92A, then the power thread stitch number setting key 79, and presses the numeric key 85, for example, "2" to set the number of windings of the power thread. The display appears on the display section 92. The size S of the power thread is set to 2.0 mm and displayed on the display section 93 by pressing the power thread size setting key 83 and pressing the numeric key 85, for example, "2" or "0".

Through the above-described setting operations, the central processing unit 86 functions to drive the needle N and the driving means 32 according to each input dimension and sewing pattern data.

After completing such an operation, when the start switch (not shown) is pressed, the chuck mechanism 59 is first in a horizontal position, and the stitching is performed in a position where the button B is in a horizontal position as shown by the chain line in FIG. That will happen.

First, the needle N has settled down to N ₁ in Figure 7.
It exits from N ₂ , drops to N ₃ , then exits to N ₄ , and a cross stitch is sewn, and this operation is repeated the number of times set with the number of stitches setting key 78 with button.

Thereafter, the air cylinder 70 (Fig. 5) becomes inoperative, the chuck mechanism 59 rotates 90 degrees from the horizontal position, and the button B becomes the state shown by the solid line in Fig. 4, and now the button B as shown in Fig. 8. A so-called neck wrapping thread 90, which forms a stitch between the sewing thread and the sewing thread of the button and around the sewing thread of the button, is wound the number of times set by the number of neck wrapping stitches setting key 80, and finally _N5 in FIG. The needle is dropped and the tacks are sewn to complete the button attachment.

〔Effect of the invention〕

As described above, according to the present invention, the number of buttonholes, the sewing pattern, and the dimensional data of the buttonhole gap are input to the central processing unit, and the drive means is operated in accordance with the drive signal. It is possible to easily change the stitching from a two-hole button to a four-hole button and to change the sewing pattern without changing the cam as in the conventional method, and the working time can be greatly shortened.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of the present invention, FIG. 2 is a perspective view of the driving means, FIG. 3 is a perspective view of the sewing material holding means, FIG. 4 is a front view of the sewing material holding means, and FIG. 5 is a front view of the chuck mechanism, Fig. 6 is a front view of the operation panel, Fig. 7 A is a front view of the button sewing state, Fig. 7
Figure 9 is a plan view of the button in its sewn state, Figure 8 is a perspective view of the button in its sewn state, and Figure 9 is a block diagram of the control circuit of the present invention. M...drive motor, 9...upper needle bar, 24...lower needle bar, 59...chuck mechanism, 40...sewn fabric holding means, 32A...driving means, 87...memory means, 86... central processing unit, 75, 76, 7
7... Button selection key, 81, 82... Dimension designation key.

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, a needle that moves between the upper needle bar and the lower needle bar, and a needle for holding the fabric to be sewn. A chuck mechanism for holding a button with a hole provided in connection with the cloth holding means to be sewn; and a chuck device for changing the relative positions of the needle, the cloth to be sewn, and the button with a hole. and a driving means for driving a sewing material holding means, a storage means for storing a large number of positional data regarding the buttonhole of the button, and an instruction for indicating the relative positions of the needle, the sewing material holding means, and the chuck device. and a storage means in which pattern data constituting the sewing shape of the buttonhole is stored based on a large number of position data regarding the buttonhole, and a drive command signal is generated in synchronization with the vertical movement of the needle based on the position data output from the storage means. a central processing unit for outputting the information to the driving means to form stitches in buttonholes; a button selection key for selecting the number of button holes to be sewn and the sewing shape; and position data for setting position data. A sewing machine with a key and electronic buttons.