JP2846174B2 - Button attachment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button sewing machine in which complete fraying is prevented by performing stop sewing at the start and end of sewing at first and third button holes, respectively.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 4, a needle plate 2 is attached to a sewing machine bed 1, a feed plate 3 is provided on the needle plate 2, and a work cloth 5 and a button 6 are held by the feed plate 3 and a button holding arm 4. The button 6 is sewn to the work cloth 5 while moving the work piece (see Japanese Patent Publication No. 61-57797).

In this sewing machine with a button, the needle 8 moves up and down through the needle hole 7 of the needle plate 2 of the sewing machine bed 1, and the known thread ring catcher 9 moves the needle plate 2 with the movement of the needle 8. , A cauldron 10 having a cauldron 10 and a thread ring catching beak 11
2, a bobbin case 14 having a bobbin (not shown) for bobbin thread (not shown).
The upper thread 16 is lowered.

The feed plate 3 has a needle passage hole 17 through which the needle 8 passes, and crosses the vertical movement path of the needle 8 on the needle plate 2 by a feed cam (not shown) which rotates in conjunction with the main shaft of the sewing machine. , The combined movement in the XX and YY directions of FIG.

FIG. 5 is a diagram showing the operation of a nine-button stitch for sewing a two-hole button. The numbers indicate the order in which the needles 8 are dropped. feed rate -Y direction is actually set to zero, but those formed by overlapping seam, for ease of hand movement situation is shown to extend pull the Y-Y direction.

The formation of a seam will be described with reference to this hand movement diagram. First, after forming the first stitch in the first button hole 6a, the needle drop point faces the second button hole 6b in FIGS. By moving the button 6 and the work cloth 5 to the right of 3, the lower thread 15 is positioned on the right side of FIG. 3 (the front side in FIG. 4) with respect to the needle 8 when the second needle 8 is lowered. Therefore, the second stitch always becomes a hitch stitch.

Next, in the formation of the third stitch, the work cloth 5 and the button 6 are further slightly moved rightward along the XX direction in FIG. 3 by the shape of the feed cam, whereby the third stitch is formed. The tip of the needle 8 falls in or near the needle hole opened in the work cloth 5 by the needle 8 at the time of forming the second needle in the same second button hole 6b.

A stitch is formed after the formation of the stitch, and a knot is formed at the seventh and eighth stitches at the end of the formation of the buttoned stitch in the same manner as the second and third stitches. Then, thread trimming is performed on the ninth stitch (the needle 8 falls at the same position as the seventh stitch), which is the last stitch, and the button attachment is completed.

[0009]

However, since the needle drops of the second and third needles are formed in the same button hole, the above-mentioned shift amount of the needle drop point is very small, so that a hitch stitch can be formed. The probability becomes worse, the knots of the second and third stitches become incomplete and cause fraying,
The first stitch is easily frayed, and once frayed, a defect such as the above-described unstable second and third stitches is easily frayed.

[0010]

According to the first aspect of the present invention , there is provided:
The disclosed invention is a button attachment method in which a button attachment seam is formed and a button is sewn to a work cloth. Next, return to the first buttonhole, form a hitch stitch at the third and fourth stitches so as to cross the first perfect stitch, and perform the desired button stitching after the fifth stitch. Do
After forming the last perfect stitch extending from the first buttonhole to the second buttonhole, returning to the first buttonhole, forming a hitch stitch so as to cross the last perfect stitch, and performing stop sewing. It is. In addition,
The invention described in claim 2 is the invention according to claim 1.
And the third button from the eleventh needle of the first button hole.
A twelfth needle is formed in the hole, and then a twelfth needle and a thirteenth needle
First across the third and fourth buttonholes by eye
Form perfect stitch and return to 3rd buttonhole
14th to cross the first perfect stitch
The stitch and the 15th stitch are formed by hitch stitching.
After the eyes, the desired button sewing is performed, and the third button hole
Perfect step from the 4th buttonhole to
After forming the switch, return to the third buttonhole to
Hitch stitches across the project stitch
To perform the stop sewing.

[0011]

According to the present invention, the first stitch is stitched into the first button hole, and the second stitch is stitched into the second button hole, so that the first and second stitches are sewn with perfect stitches. .

Next, the third stitch returns to the first buttonhole and drops, and the fourth stitch is formed by the first stitch and the second stitch.
Hitches the first perfect stitch
The first par by dropping the needle so that it becomes a stitch
Since the knot is formed so as to cross the perfect stitch, the first stitch is less likely to fray, and even if the first stitch is frayed, the second to fourth stitches prevent subsequent fraying.

Further, a desired button is provided for the fifth and subsequent stitches.
Perform sewing and pass from the first button hole to the second button hole.
After forming the last perfect stitch,
I will go back to the tongue and cross the last perfect stitch
By forming the hitch stitch and performing the stitching in this manner, it is possible to completely prevent the two-hole button from fraying.

Furthermore, the 12th stitch forming eleventh stitch of the first button hole in the third buttonhole, then the 12 needles
Third and fourth button holes by eye and thirteenth eye
To form the first perfect stitch over, the third of
Return to the buttonhole and cross the first perfect stitch
14th and 15th stitches are formed by hitch stitching
Then, after the 16th stitch, the desired button sewing is performed,
The last perf from buttonhole 3 to buttonhole 4
After forming the stitch, return to the third buttonhole
Hitch-steering across the last perfect stitch
By forming a stitch and performing a stitch, fraying of the last stitch can be eliminated.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a hand movement diagram of a button stitch of 22 stitches for stitching a four-hole button according to an embodiment of the present invention, wherein a button 6 has a first button hole 6a and a second button. A hole 6b, a third button hole 6c, and a fourth button hole 6d are provided. Then, the second button is inserted through the first button hole 6a.
When the hands are moved in the direction of the
A stitch is to be formed and conversely a second button
The hand is not moved from the tongue hole 6b toward the first button hole 6a.
Hitch stitches are formed when
You.

The first stitch 1 drops into the first button hole 6a, and the second stitch 2 drops into the second button hole 6b, so that the first stitch 1 to the second stitch 2 are perfect stitched. To sew.

Next, the third needle 3 is inserted into the first button hole 6a .
To drop the needle to the lower right of the first needle. At this time, the second needle 2
The sewing of the 3rd stitch 3 from the 1st stitch 1 to the 2nd stitch 2
On the contrary, it becomes hitch stitch. 4th needle 4 is the first button
Move the needle so as to cross the first stitch 1 in the hole 6a
Then, by forming a hitch stitch, a knot is formed across the first stitch 1.

Thereafter, the fifth stitch 5 is also moved to the first button hole 6a.
Needle let fall within, the sixth stitch 6 eighth stitch 8 second button
Needle let fall in down hole 6b, a seventh stitch 7 ninth stitch 9 first
Sewing <br/> made finishes performed alternately between let fall needle of buttonhole 6 a with the first button <br/> hole 6a and the second button hole 6b of the button 6.

Next, after the ninth stitch 9 is dropped to the first stitch, the tenth stitch 10 and the eleventh stitch 11 are moved to the first button.
In the tongue hole 6a , the needle moves from the second stitch 2 to the third stitch 3.
Similarly, move the needle so as to cross the seventh stitch 7 to drop the needle
As a result, a knot is formed across the seventh stitch 7.

By sewing as described above, it is possible to completely prevent the two-hole button from fraying.

Further, in the case of a four-hole button, the button 6 is moved so that the twelfth needle 12 drops into the third button hole 6c, and the first third needle 13 drops into the fourth button hole 6d. after the first 4 stitch 1 4, the first 5 stitch 1 5 third volume
In the tongue hole 6c , the needle moves from the second stitch 2 to the third stitch 3.
Move the needle so that it crosses the 12th stitch 12
By doing so , fraying of the twelfth needle is prevented.

Then, the 16th to 19th stitches 17 to 19 are
Reciprocate between the third and fourth button holes 6c and 6d sequentially.
After the 20th needle 20 is dropped into the third hole 6c,
The 20th stitch 20 and the 21st stitch 21 are connected to the third button hole 6c.
In the same way as the movement from the second needle to the third needle, the 18th needle
By moving the needle across the eye 18 and dropping the needle
And form a knot to form a final stitch 2 near the twentieth stitch 20.
By dropping 2, stitching can be performed to eliminate fraying of the seam.

In the above embodiment, only the sewing of 11 stitches in the two-hole button and the stitching of 22 stitches in the four-hole button are described. However, the present invention is not limited to these, and 22 stitches plus 4α (however, α = 0, 1, 2, 3,
..., 22 needles, 26 needles, 30 needles,
Needless to say, the same can be said for 34 needles and so on.

[0024]

As described above, in the button sewing machine according to the present invention, it is possible to prevent the fraying of the two-hole button by forming the two stop stitches in the first button hole. by forming a stitch twice the third button hole, it is possible to prevent the seam fray at the end,
Furthermore, there is an advantage that even if the jumping thread between the upper and lower button holes is cut, fraying is prevented, and the sewing is formed uniformly and beautifully.

[Brief description of the drawings]

FIG. 1 is a hand movement diagram of a 22-button stitch for sewing a four-hole button according to an embodiment of the present invention.

FIG. 2 is a top view of a part of this type of button sewing machine.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a needle movement diagram of a conventional 9-button stitch with a button.

[Explanation of symbols]

6 button 6a first button hole 6b second button hole 6c third button hole 6d fourth button hole 1-22 stitches

Claims (2)

(57) [Claims] 1. A button attaching method in which a button attaching seam is formed to sew a button on a work cloth,
Forming a first perfect stitch from the first buttonhole to the second buttonhole with the first and second stitches;
Next, returning to the first buttonhole, a hitch stitch is formed by the third and fourth stitches so as to cross the first perfect stitch, and a desired button sewing is performed on the fifth and subsequent stitches. Forming the last perfect stitch extending from the first button hole to the second button hole, and then forming a hitch stitch so as to cross the last perfect stitch by returning to the first button hole to perform a stop sewing. Attachment method . 2. A twelfth needle is formed in the eleventh to third buttonholes of the first buttonhole, and a third buttonhole and a fourth button are formed by twelfth and thirteenth needles. The first perfect stitch is formed across the hole, and the 14th and 15th stitches are formed with hitch stitches so as to return to the third button hole and cross the first perfect stitch. After performing sewn-on sewing and forming the last perfect stitch extending from the third button hole to the fourth button hole, a hitch stitch is formed so as to return to the third button hole and cross the last perfect stitch. The method according to claim 1, wherein the sewing is performed.
1. The button attaching method according to 1 .