JPH0218874B2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is applicable to sewing buttons on a sewing product.
The present invention provides a method for mechanically applying neck wrapping in a good and strong manner.

``Conventional technology'' Conventionally, this method of attaching a button at the root of the seed is as follows:
The sewing process involved two steps: the first step was to sew the button with the root thread using a cam, and the second step was to circumvent the outside of the root thread and wrap the button.

"Problems to be Solved by the Invention" In conventional mechanical button attachment using a cam device, etc., when attempting to perform neck wrapping using a special device, only the outside of the root thread has to be wrapped in a roundabout shape. Because it is a Nasu root wrapping, there are disadvantages such as thread unraveling and skipped stitches, and in addition, each time you change the default number of stitches, it is necessary to disassemble the sewing machine and replace the cam, etc. There have been various problems such as being complicated, inefficient, and requiring unnecessary expense for disassembling and assembling, and it is an object of the present invention to eliminate these drawbacks and problems.

"Means for Solving the Problems" In order to achieve the above object, the present invention replaces the conventional table movement in the X and Y directions with a motor that moves the table in the X and Y directions. By using a computer to change the number of stitches and button sewing patterns, we have made it possible to freely change the number of stitches for neck wrapping, compared to the traditional neck wrapping with a rounded outer side, and with two cylinders. Deep seams (power thread) and shallow seams (normal seams) are sewn separately, and the above-mentioned drawbacks of the conventional sewing machine have been solved.

``Embodiments and Effects'' Now, detailed description will be given of the accompanying drawings showing an example of the apparatus used to carry out the present invention.

1 is a button holder for clamping buttons; 2 is a fabric holder for placing the fabric to be buttoned; 3 is a fabric presser that presses the fabric from above by the action of the cylinder 21; 4
5 is a fabric guide that works with the fabric holder 2 to fix the fabric, and 5 is a table that moves the button holder 1 in the X and Y directions. 6 is the fabric holder arm (left), which is used to release the fabric holder 2 after button sewing by the action of the cylinder 8; 7 is the fabric holder arm (right), which attaches the button holder 1; 8 is the fabric holder arm The holder fixing cylinder is used to press the fabric holder 2 during button sewing. 9 is a connecting rod that transmits the action of the cylinder 8 to the action of the fabric holder. Reference numeral 10 denotes a shaft, which is a rotating shaft for opening and pressing the dough holder 2 through the dough holder bracket.
11 is the needle plate, 12 is the stopper and the fabric holder 2
13 is a bracket for attaching the fabric holder 2, 14 is a thread adjustment screw for adjusting the depth and shallowness of the first stitch,
15 is a power thread release cylinder, which releases the first stitch; 16 is a power thread release adjustment screw, which determines the position of the needle drop from the second stitch; 17 is a button holder rotation cylinder for sewing buttonholes. rear,
In order to change the button holder 1 to the neck-wrapping process, a cylinder is used to move the button holder 1 from a horizontal state to a vertical state; 18 is a connecting rod that transmits the action of the cylinder 17 to the horizontal and vertical actions of the button holder 1; The arms serve the same role as 18. 20 is a stopper that determines the horizontal and vertical position of the button holder 1; 21 is a fabric presser cylinder that operates the fabric presser 3 to press and release the fabric; 22 is an arm; 23
is the needle, 24 is the sewing machine arm, 25 is the button, 26
is a spring that normally presses the dough guide 4 toward the operator. 27 is a screw for fixing the spring 26, 28 is a sewing material, and 29 is a root thread.

Next, the effects of the present invention will be described.

After setting the button in the button holder 1 and setting the fabric in the fabric holder 2, push it into the fabric guide 4 to the innermost part. Next, when the pedal is depressed, the fabric holder fixing cylinder 8 acts, and the fabric holder 2 is pressed together with the fabric onto the upper surface of the fabric guide 4, and at the same time, the fabric presser cylinder 21 acts to press the fabric holder 3.
presses the fabric from above, the sewing machine starts rotating, and when the first stitch is sewn, the power thread release cylinder 15 starts operating and the fabric holder 2 returns to the front.

Next, the entire feeding device moves forward so that the needle falls into the buttonhole from the second stitch onwards, and the button attaching process begins. When the predetermined number of stitches is completed, the needle 23 stops at the top dead center and the thread trimming knife is activated. Finish cutting the thread. Then, the feeder moves to the left to sew the buttonhole on the left side, starts the button-sewing process for the next buttonhole, and after completing the predetermined number of stitches, the needle 23 stops at the top dead center again, and the thread After the thread is cut by the operation of the cutting knife, the button holder 1 is rotated from a horizontal position to a vertical position centering on the operator to perform neck wrapping sewing by the operation of the button holder rotation cylinder 17. The first stitch is sewn, but the structure of the stitch may be incomplete, so after sewing the first stitch into the fabric, sew the middle or outside of the root thread on the forward pass, and the outside or middle of the root thread on the return pass. Finally, the neck-wrapped binding part is sewn by a preset number of stitches, and the needle thread is cut by the operation of the three-time thread trimming knife, thereby completing the neck-wrapping sewing. Note that although this embodiment is designed for attaching four-hole buttons, it is possible to sew buttonholes of various shapes.

``Effects of the Invention'' The present invention has the above-described structure, and the table movement in the X and Y directions is now moved by a motor instead of mechanically, thereby changing the number of stitches and button sewing patterns. Using a computer, we automatically control the sewing machine rotation speed for sewing,
Preliminary stitching is performed until the sewing becomes stable, and after the sewing is stabilized, the sewing machine rotation is returned to normal and button sewing is performed. Also, the two cylinders are used to create deep seams (power thread) and shallow seams (normal seams). The results are truly significant, as sewing is done separately, eliminating the need to remove cams, etc., and eliminate the occurrence of defective sewn products.

[Brief explanation of drawings]

The attached drawings show an example of an apparatus for carrying out the present invention, and Fig. 1 is a left perspective view during the button sewing process, and Fig. 2 is a perspective view of the button holder from a horizontal position due to the neck wrapping process after the button is sewn. A perspective view when it is in the vertical position, Figure 3 is a side view showing the position of the fabric holder when sewing shallow seams (normal seams), and Figure 4 is a side view showing the position of the fabric holder when sewing deep seams (power thread). FIG. 5 is a front view showing the order in which neck wrapping is performed, and FIG. 6 is a front view showing the needle drop position of the second stitch before neck wrapping is completed. 1... Button holder, 2... Fabric holder,
3...Dough presser, 4...Dough guide, 5...Table, 6...Dough holder arm (left), 7...Dough holder (right), 8...Dough holder fixing cylinder, 9...Connecting rod, 10...shaft, 11...throat plate, 12...stopper, 13...fabric holder bracket, 14...power thread adjustment screw, 15...power thread release cylinder, 16...power thread release adjustment screw,
17...Button holder rotating cylinder, 18...
...Connection rod, 19...Button holder shaft arm, 20...
...Stopper, 21...Dough pressing cylinder,
22... Arm, 23... Needle, 24... Sewing machine arm, 25... Button, 26... Spring, 27... Screw, 28... Sewing fabric, 29... Root thread, A...
Position of the first stitch during neck wrapping sewing, B to I...position of stitch movement for neck wrapping, J to K...position of the last two stitches of neck wrapping sewing.

Claims (1)

[Claims] 1. Using a neck-wrapping button sewing machine equipped with a computer, neck-wrapping is performed over the middle and outside of the root thread in the forward pass and over the outside and the middle of the root thread in the return pass, and the area is sewn. This neck-wrapping button attachment is characterized in that the neck-wrapping is sewn in reverse for the outward and return passes as necessary, and finally, a preset number of stitches are sewn on the neck-wrapped binding part. Method. 2 Using a neck-wrapping button sewing machine equipped with a computer, sew the neck wrap around the middle and outside of the root thread on the forward pass, and over the outside and middle of the root thread on the return pass, or, if necessary, sew the neck wrap around the middle and outside of the root thread on the forward pass, or as necessary, sew the neck wrap around the middle and outside of the root thread on the outward pass. On the return trip, the neck wrapping is sewn in the opposite direction, and finally, a preset number of stitches are sewn on the neck-wrapped binding part, and the button is parallel to the sewing material after the neck wrapping is completed. , a method for attaching a neck-wrapping button, characterized in that the neck-wrapping is perpendicular to the sewing material.