JP7554444B1 - Temporary fastening device using needle punch needles - Google Patents

Abstract

[Problem] The task of raising and lowering the presser foot lifting lever on a sewing machine and sewing cloth while removing the pins is extremely cumbersome, and there are also issues such as the risk of injury to the human body from pins being lost or pierced by the hand, the risk of needles breaking due to contact between the pins and the sewing needle, and the risk of the sewing machine breaking due to the pins getting caught inside the sewing machine. Therefore, a temporary fastening device is provided that allows the user to temporarily fasten cloth without using pins and sew cloth without making extensive use of the presser foot lifting lever. [Solution] The temporary fastening device of the present invention is an alternative method for temporarily fastening cloth without using pins. This device uses a needle punch needle 5 with thread attached to the end of a handle 1 to pierce cloth or the like sandwiched between the presser foot and the base, and then pulls it up, leaving only the thread piercing the cloth, and by repeating this process, it is possible to prevent the cloth from slipping and temporarily fasten the cloth. [Selected drawing] Figure 4

Description

The present invention relates to a temporary fastening device that replaces a pin and prevents slippage of overlapping pieces of fabric (hereinafter simply referred to as "fabric") and temporarily holds them together when sewing two pieces of fabric together with the right sides together using a sewing machine.

The sewing machine will be explained with reference to Figure 10. Figures 10(a) and (b) are a perspective view and a side view of the same part of the sewing machine. The "fabric" 4 in Figure 10(b) is clamped between the upper "presser foot" 11 and the lower "feed dog" 10, and sewn by intertwining it above and below with a thread passed through the "sewing needle" 13 in Figure 10(a). Because of the structure of the machine, the "feed dog" 10 moves in a straight line, so straight line sewing is the basic method, but curved sewing is also possible.

To sew curved stitches, the "fabric" 4 must be rotated by hand in sync with the linear motion of the "feed dog" 10, but this method causes misalignment between the top and bottom of the "fabric" 4 sandwiched between the "presser foot" 11 and the "feed dog" 10. For this reason, the current situation is that the top and bottom pieces of "fabric" 4 are temporarily secured with "pins" 14 to prevent misalignment, as shown in Figure 11. In particular, when the radius of the curved part is small, the misalignment becomes large, and the "pins" 14 must be used frequently.

It is possible to temporarily fasten the sewing thread with a "clip" (not shown) instead of the "pin" 14, but this is difficult to attach and remove, and is not suitable for sewing fine curves.
On the other hand, the stapler disclosed in Patent Document 1 and shown in FIG. 13 is for fastening paper or the like, and is not for fastening "cloth" 4.

Current sewing machines have a problem in that they require the use of auxiliary tools such as "pins" 14 and "clips" to prevent the "fabric" 4 from slipping and to temporarily fasten it in place. This is a factor that reduces the operability and efficiency of the sewing machine.

There is also a handicraft technique called needle punching, in which thread passed through a special needle is inserted into "fabric" 4 to create a pattern or picture. The needle is called by a variety of names, including the "embroidery needle" in Patent Document 2 and the "embroidery machine" in Patent Document 3, as well as "punch needle," "needle punch needle," "cultural embroidery needle," and "free stitching needle." In this application, the needle used for needle punching will be called the "needle punch needle" 5.

JP 11-188658 A Japanese Utility Model Application Publication No. 07-019388 Japanese Utility Model Publication No. 57-48290 (microfilm)

When sewing "cloth" 4 with the sewing machine shown in FIG. 10(b), the "cloth" 4 sandwiched between the "feed dog" 10 and the "presser foot" 11 is raised and lowered by the "presser foot lifting lever" 12 linked to the "presser foot" 11, and the sewing work is very cumbersome while removing the "pins" 14. Since sewing with a sewing machine involves repeating the steps of "lowering the "presser foot lifting lever" 12, sewing, raising the "presser foot lifting lever" 12, and removing the "pins" 14," the number of times the "presser foot lifting lever" 12 is operated is two for each time the "pins" 14 is removed. For example, if 50 "pins" 14 are used to sew a baby bib like that shown in FIG. 11, the number of times the "presser foot lifting lever" 12 is operated is 100.

In addition, when using the "pins" 14 to temporarily fasten the "fabric" 4 in FIG. 11, care must be taken with how the "pins" 14 are inserted into the "fabric" 4, as well as the location and spacing of the pins, and there is a risk of injury to the human body, such as losing the "pins" 14 or piercing the hand.

Furthermore, when sewing "cloth" 4 with a sewing machine, there are problems such as the breakage of "sewing needle" 13 or "mark pin" 14 as shown in Figure 12 (a) (b) due to contact between "mark pin" 14 and "sewing needle" 13 as shown in Figure 12 (b), bending of "mark pin" 14 as shown in Figure 12 (c), and malfunction of the sewing machine body due to "mark pin" 14 getting caught inside the sewing machine as shown in Figure 12 (d).

To solve the above problems, it is necessary to temporarily hold the "cloth" 4 in place without using a "pin" 14 when sewing the "cloth" 4 with a sewing machine, and to sew the "cloth" 4 in a way that does not make extensive use of the "presser foot lifting lever" 12.

The present invention is a temporary fastening device that is made up of three components, a "handle" 1 with a "needle punch needle" 5 attached, a "cloth presser" 6, and a "base" 3, connected in that order at an "end" 23 and rotatable around the "end" 23 as a pivot point, and the "cloth presser" 6 serves to hold down multiple pieces of "cloth" 4 that are sandwiched between it and the "base" 3.

In other words, after the "needle punch needle" 5 with the "thread" 16 threaded through it has pierced the "cloth" 4, the "needle punch needle" 5 is pulled up, leaving only the "thread" 16 threaded through the "cloth" 4, and by repeating this process, it is possible to prevent the upper and lower "cloths" 4 from shifting and to temporarily fasten them together.

The present invention provides a device that prevents the "fabric" 4 from shifting when sewing with a sewing machine, allowing the "fabric" 4 to be temporarily secured in place without using the "pins" 14. This eliminates the need to raise and lower the "presser foot lifter" 12 and remove the "pins" 14 while sewing, speeds up sewing, and prevents loss of the "pins" 14, hand injuries, and sewing machine breakdowns. In other words, this invention is expected to improve the efficiency and safety of sewing work, as well as increase the value of sewing machines in the industrial world.

FIG. 2 is a front view of the temporary fastening device of the present invention. FIG. 3 is a cross-sectional view of the temporary fastening device taken along line BB in FIG. 2. 2 is a cross-sectional view of the temporary fastening device taken along line AA in FIG. 1. FIG. 5 is an enlarged view of the front part of FIG. 1 is a perspective view of the temporary fastening device with a "thread" 16 threaded therethrough, and a diagram showing the operating pattern when the "cloth" 4 is temporarily fastened with the temporary fastening device. FIG. 2 is a diagram showing the state in which the "cloth" 4 is temporarily fastened using the same temporary fastening device. 1 is a side view and a plan view of a needle clamp screw 9, a needle punch needle 5, and a handle 1 before the needle punch needle 5 is attached to the handle 1. FIG. This figure shows a plan view of the surfaces of the "cloth presser" 6 and the "base" 3 that clamp the "cloth" 4 (the "cloth presser" 6 is shown from below) and examples of side views (a), (b), and (c). FIG. This is a diagram showing the "cloth" 4 being temporarily fastened with a "pin" 14. 1 is a diagram showing how a needle breaks due to contact between a "sewing needle" 13 and a "marking pin" 14. FIG. FIG. 1 is a cross-sectional view showing the configuration of a conventional "stapler." FIG. 1 is a diagram showing the use of a conventional "needle punch needle" 5.

Stapler shapes as shown in FIG. 13 of Patent Document 1 are known, but the temporary fastening device provided by the present invention has a metal handle 1 pivotally attached to the rear of the fabric presser 6 in FIG. 4, which functions in the same way as a metal handle 19 pivotally attached to the rear of the magazine 17 of a stapler.

The difference between the temporary fastening device of the present invention and a "stapler" is that a "stapler" uses a "driver" 18 attached to the end of a metal "handle" 19 to drive out "staples" (not shown) that are shaped like a U and stored in a metal "magazine" 17, and clinch paper, etc., whereas the temporary fastening device of the present invention uses a "needle punch needle" 5 attached to the "handle" 1 as shown in Figures 4 and 5, which penetrates the "fabric" 4 sandwiched between the "fabric presser" 6 and the "base" 3 and then pulls it up, fixing the upper and lower "fabrics" 4 together using only the "thread" 16 as shown in Figure 7. By repeating this process, it is possible to prevent the upper and lower "fabrics" 4 from shifting and to temporarily fasten them together.

The configuration of the temporary fastening device of the present invention is explained with reference to FIG. 4. The three bodies, "handle" 1 with "needle punch needle" 5 attached, "cloth presser" 6, and "base" 3, are connected in this order at "end" 23, and the device can rotate freely around the "end" 23 as a rotation axis. A "coil spring" 7 is attached between the "handle" 1 and the "cloth presser" 6, and a "leaf spring" 8 is attached between the "cloth presser" 6 and the "base" 3. When pressure is applied to the "handle" 1, "cloth presser" 6, and "base" 3 from above and below, the three bodies combine, and when pressure is stopped, they return to their original state. As shown in FIG. 6, the relationship of these three bodies is such that the "cloth presser" 6 first descends onto the "cloth" 4 on the "base" 3, and then the "handle" 1 with the "needle punch needle" 5 attached descends. An example of the selection of both springs is shown.

While the "leaf spring" 8 shown in Figure 4 serves to create a gap between the "cloth presser" 6 and the "base" 3 for the "cloth" 4 to be inserted, the "coil spring" 7 serves to pull the "needle punch needle" 5 out of the "cloth" 4 sandwiched between the "cloth presser" 6 and the "base" 3, and at the same time serves to press down the "cloth" 4 between the "base" 3 via the "cloth presser" 6. In other words, since the "needle punch needle" 5 cannot properly pierce the "cloth" 4 if the tension in the "cloth" 4 is weak, it is necessary to prevent the "cloth" 4 from slackening. For this reason, the "coil spring" 7 between the "handle" 1 and the "cloth presser" 6 needs to be strong enough to prevent the "cloth" 4 from slackening.

Conventional needle punching is explained using Figure 14. It involves using a hollow "needle punch needle" 5 to embed embroidery thread or wool into the fabric, and is a handicraft technique that allows you to create patterns or pictures by simply threading "thread" 16 through the "needle punch needle" 5 and stitching it into "cloth" 4 stretched over a "stitch hoop" 20 or the like, as if drawing an illustration.

The present invention aims to achieve a temporary fastening effect on "fabric" 4 using this "needle-punch needle" 5. This "needle-punch needle" 5 is a needle with the tip of a long, thin pipe cut at an acute angle as shown in Figure 6 (d), and on the opposite side of the "cut surface" 24 there is a "horizontal hole" 25 for passing "thread" 16 as shown in Figures 6 (d) and (e). When using the "needle-punch needle" 5, the "thread" 16 is pulled out from the top of the pipe-shaped needle towards the needle tip, and then the pulled out "thread" 16 is inserted into the "horizontal hole" 25 at the needle tip and then inserted into "fabric" 4.

In other words, the operating pattern when using the temporary fastening device of the present invention is as follows: the "needle punch needle" 5 with the "thread" 16 threaded through it is inserted from the top of the "handle" 1 and pierces the "fabric" 4 as shown in Figure 6(a), then the "needle punch needle" 5 is pulled up as shown in Figure 6(b), leaving only the "thread" 16 piercing the upper and lower "fabrics" 4; by repeatedly piercing the "needle punch needle" 5 as shown in Figure 6(c), the "thread" 16 pierces the upper and lower "fabrics" 4 as shown in Figure 7, creating a loop on the lower side, preventing the upper and lower fabrics from shifting and enabling temporary fastening.

At this time, in order to securely fasten the upper and lower "cloths" 4 temporarily, it is necessary that the "thread" 16 remains in a loop on the underside of the "cloth" 4 when the "thread" 16 penetrates the "cloth" 4. To achieve this, when the "needle punch needle" 5 is pulled out of the "cloth" 4, the "thread" 16 must be supplied from above the "needle punch needle" 5 in the amount of the "thread" 16 left under the "cloth" 4. Furthermore, since it is necessary to prevent the "thread" 16 inserted into the "cloth" 4 from slipping out from the bottom to the top, suitable fabrics for the "cloth" 4 include medium to thick, tightly woven fabrics, sheeting, denim, oxford, etc., and the "thread" 16 to be used is, for example, No. 25 embroidery thread, No. 40 lace thread, sewing machine thread, etc., and for the "needle punch needle" 5, it is preferable to use a thin needle that causes less damage to the "cloth" 4, unlike in the case of embroidery.

In Figure 6, when the "needle punch needle" 5 is continuously pierced into the "fabric" 4, if the needle advances in the opposite direction to the "cut surface" 24 at the needle tip in Figure 6(b), the needle will pierce the "thread" 16 coming out of the "horizontal hole" 25 of the needle, which will not work. Also, since the needle will be piercing the outside of the "finished line" 15 in Figure 11 so as to be parallel to the "finished line" 15, it is necessary to fix the "cut surface" 24 of the needle so that it always faces in the direction of advance.

As described above, in the temporary fastening device of the present invention, when the side with the "needle punch needle" 5 in FIG. 4 is the front and the "end" 23 is the rear, the "needle punch needle" 5 in FIG. 8 is provided with a "fingertip-shaped protrusion" 21, while the upper part of the "handle" 1 is provided with a "groove into which the fletching protrusion fits" 22, and when the "needle punch needle" 5 is inserted along the groove and the upper part is fastened with the "needle fastening screw" 9, the "cut surface" 24 of the needle tip of the "needle punch needle" 5 is fixed so that it always faces in a certain direction. This also makes it possible to replace the "needle punch needle" 5 according to the type of "fabric" 4. For example, for a right-handed person, the "cut surface" 24 faces left and moves leftward, and for a left-handed person, the "cut surface" 24 faces right and moves rightward. In this way, the direction of the "cut surface" 24 can be determined according to whether the person is right-handed or left-handed.

As mentioned above, in order to insert the "needle punch needle" 5 into the "fabric" 4, the "fabric" 4 must not become loose. The temporary fastening device of the present invention is provided with a loosening prevention means for preventing the "fabric" 4 sandwiched between the "fabric presser" 6 and the "base" 3 from becoming loose. For example, as shown in FIG. 9(a), protrusions are provided on the underside of the "fabric presser" 6 and on the upper side of the "base" 3, and in combination with the force of the "coil spring" 7 between the "handle" 1 and the "fabric presser" 6, the "fabric" 4 sandwiched between the "fabric presser" 6 and the "base" 3 is prevented from becoming loose. In the example of FIG. 9(a), there are three protrusions on the "fabric presser" 6 side and three protrusions on the "base" 3 side, but by shifting the positions of the upper and lower protrusions, the "fabric" 4 is fixed with six protrusions.

Figure 9(a) shows an example of clamping and fixing the "fabric" 4 with protrusions attached to the "fabric presser" 6 and the "base" 3, but other possible methods include attaching a rubber ring-like object to the underside of the "fabric presser" 6 and the top of the "base" 3 to fix the "fabric" 4, as shown in Figure 9(b), and examples such as Figure 9(c), which is a combination of Figure 9(a) and Figure 9(b).

Using such a temporary fastening tool, for example, 2 to 3 millimeters outside the "finished line" 15 in Figure 11 is temporarily fastened, and then the sewing machine is used to sew along the "finished line" 15. After that, by removing the temporarily fastened "thread" 16, it is possible to sew beautifully and neatly without using "safety pins" 14 or clips, etc.

In recent years, handmade items have become increasingly popular, with an increasing number of people selling their own creations over the internet. The sewing machine is one of the most important tools, and has a significant impact on sewing skills and efficiency. By improving the operability and functionality of sewing machines, this invention can improve sewing quality and speed, allowing sewing machine users to create more items and enjoy economic benefits. We believe that the sewing machine market will continue to expand worldwide, greatly contributing to the growth of the industry.

1. Handle 2. Handle cover 3. Base 4. Layered cloth, etc. (read as cloth)
5 Needle punch needle 6 Cloth presser foot 7 Coil spring 8 Leaf spring 9 Needle fixing screw 10 Feed dog 11 Presser foot 12 Presser foot lift lever 13 Sewing needle 14 Sewing pin 15 Finished line 16 Thread 17 Magazine 18 Driver 19 Handle (stapler)
20 stitch hoop 21 feather-shaped protrusion 22 groove into which feather-shaped protrusion fits 23 end 24 cut surface 25 horizontal hole

Claims (3)

This temporary fastening device has three bodies, a handle (1) with a needle punch needle (5) attached, a cloth presser foot (6), and a base (3), connected in that order at their ends (23) and can be rotated around the end (23) as a pivot axis . By applying pressure to these three bodies , the needle punch needle (5) with a thread (16) passing through it penetrates multiple pieces of cloth (4) sandwiched between the cloth presser foot (6) and the base (3), and by removing the pressure and pulling up the needle punch needle (5), only the thread (16) remains, having penetrated the upper and lower pieces of cloth (4). 2. The temporary fastening device according to claim 1, wherein a protrusion (21) is attached to the needle punch needle (5), while a groove (22) into which the protrusion fits is provided on the upper part of the handle (1), and the protrusion (21) of the needle punch needle (5) is inserted into the groove ( 22), thereby fixing the cut surface (24) of the tip of the needle punch needle (5) so that it always faces in a constant direction. 2. The temporary fastening device according to claim 1, wherein a means for preventing slack in the fabric (4) sandwiched between the fabric presser foot (6) and the base (3) is provided on the underside of the fabric presser foot (6) and on the upper side of the base (3) so as to surround a hole through which the needle punch needle (5) passes .