JPS62164489A - Over sewing type multineedle sewing machine for hemming and over edge stitch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to a special overedge stitch (overedge stitch).
edge 5titch), as well as edge overcut (ov
Cut seams (cut)
ting-sewing> type, multi-needle
edle) related to sewing machines.

[Prior Art and Problems to be Solved by the Invention] In the technical field of industrial sewing machines, there is a special sewing machine that hems the edges of fabric and also performs a special finishing stitch called an overedge stitch. be. This sewing method covers at least part of the edge in order to prevent the edge from fraying. This stitch extends from the edge of the fabric toward its near interior.

Various types of overedge stitches are known and cataloged, but they differ from each other for the following reasons. i.e. the number of threads used, the distance from the edge of the fabric to the inside part, and therefore the rib width, the aesthetic effect produced thereby or the pattern created, the stress resistance, among others.
The stopping power that the thread exhibits when it breaks, and finally, the adaptability to the fabric, which varies greatly from fabric to fabric. It should be noted that some of the stitches described above are symmetrical and look substantially similar when viewed from the front and back of the fabric, while others appear different when turned inside out.

The following classification is listed in the Federal Standards Catalog: Overedge Stitch Type 504 with Different Ridge Widths (No. 1a, lb
, 2a, 2b, 3a, 3b) and stitch 506
and type 514 (see figure 48, 4b), and histich 5
It is a type 12 (see figures 5a, 5b, 6a, and 6b).

These stitches are part of the catalog for the pre-meeting ceremony, and the details are shown in each diagram I showed Father.
These themselves have properties that are used in specific applications, ie well-known custom made garments.

In other words, in many cases it is not possible to freely choose which stitch to use, but rather one must work with prescribed stitches.

The disadvantages arising from this situation are as follows: Current overedge stitch sewing machines cannot perform all the above-mentioned stitches, but only one of them or a few types of stitches. As a result, everyone who makes custom clothing, furniture fabrics, etc. must have a variety of different types of seam sewing machines to perform overedge stitching in their own way.

In the case of high production rates, it is necessary to have a large number of sewing machines capable of performing a fixed overedge stitch, while if a stitch other than the above-mentioned types is required, all of these machines may remain unavailable. This drawback becomes a particularly serious problem when one considers that it can be left unattended.

Attempts have already been made to somewhat prevent this serious drawback by creating multi-needle, multi-purpose sewing machines. Currently, one of the sewing machines with a high degree of freedom is
Stitch type 514 (Figures 4a and 4b) as follows:
There are certain things that can be done. That is, it consists of two needles, an upper looper used to connect one upper thread to both needle threads, a lower thread and the upper thread to each other, and a lower thread itself to two needle threads. It has a lower looper used for connecting. This sewing machine can not only perform stitch 514 type, but also stitch 504 type shown in Figures 1a, 1b, 2a, and 2b by removing one of the needles.

The stitch type 504 shown in Figures 3a and 3b cannot be performed for the following reasons. That is, although it is listed as type 504, only one needle is unusually far from the edge of the fabric. Stitch type 512 (figures 5a, 5b, 6a, 6b) is also not possible with the sewing machine described above, and for this purpose there are other suitable sewing machines with two needles.

There are few cases where it is unnecessary to perform a stitch different from the standard one, and for this purpose a single needle sewing machine capable of performing the stitch 504 type is also provided.

Overall, the overedge shown in Figures 18 to 6b
Best practice requires different basic sewing machines to perform the stitches. However, stitches 514 and 504 can be performed using the same sewing machine, other sewing machines can be used to perform stitch 512, and 3a.

For the special stitch type 504 shown in Figure 3b, it is equipped with one needle placed very far from the edge of the fabric being sewn, and two loopers, upper and lower, each carrying the thread to said needle. The necessity of using a special sewing machine,
This is taken into consideration.

However, considering not only the non-versatile nature of current crimp sewing machines that perform over-edge stitches, but also the stitch types listed in current catalogs, the current situation is negative.

In fact, due to the non-versatile nature of this sewing machine, its construction is completely reliable both in terms of strength and safety, while the overedge has a beautiful shape suitable for decorating the edges of fabrics.
No one is interested in thinking about stitches anymore. Considering the high quality products,
Although it is preferable to use this type of stitch,
That is not possible.

From an operational standpoint, the following additional characteristics are desirable for new types of stitches:

In other words, it has the ability to send a considerable amount of thread to the inner part of the fabric in order to perform the same stitching on slightly thicker fabrics without interfering with the sewing machine.

Based on this situation, the technical basic problem of the present invention is to devise a crimp sewing machine for overedge and overedge stitches, which substantially eliminates the above-mentioned drawbacks.

In view of this technical problem, an essential objective of the present invention is to devise a hem stitch sewing machine suitable for performing new and superior overedge stitches on fabrics of various thicknesses. There is one.

A further important object of the present invention is to create an overedge burr stitch machine which, in addition to being used for these new stitches, is also a versatile multi-purpose machine and is capable of performing all known overedge stitches. It's about coming up with ideas.

A further object of the present invention is to devise a crimp sewing machine which has a very simple structure and can be economically converted from existing sewing machines by modification.

A further object of the invention is to devise an overedge stitch which can be performed by the sewing machine described above and which is of a type of aesthetic value and which exhibits great safety and reliability.

[Means and Effects for Solving the Problems 1 These objects and the objects to be clarified below are substantially achieved by a criss-cross type multi-needle sewing machine for hem stitching having the following features. In other words, this sewing machine is a straight line r! at least three needles arranged parallel to each other based on the s-line, a support part from which one or more of said needles can be optionally removed, a lower looper cooperating with all said needles, and a specific apart from the last needle passing through the sewing path and furthest from the edge of the fabric, an upper looper cooperating with said needles;

A feature of the sewing machine mentioned above is that it can perform the patented bar edge stitch, which features five threads; The last needle thread is distinguished by its distance from the edge of the fabric, the lower thread for the lower looper thread that exits on the outside of the fabric, and the upper thread for the upper looper that also exits on the outside of the fabric; The bobbin thread is tied to the needle thread r at the edge of the fabric, and connected to all the needle threads in the area where the needle thread pierces the fabric; The first needle thread extends between the lower thread, which connects at the point where the fabric is pierced; the first needle threads are adjacent to each other and act parallel to the edge of the fabric, The last needle thread is parallel to the first needle thread and is connected only to the lower thread.

[Embodiment] A preferred embodiment of the sewing machine according to the present invention is described in Section 9.11.
This is shown in Figure 12. This sewing machine includes three needles, designated 1.2 and 3, respectively, as seen in FIG. As can be seen in FIG. 9, which shows a cross-section of the needles, the needles are arranged next to each other and are arranged according to a straight directrix.

FIG. 9 also shows, in dotted lines, a cross-section of the needle at the next position due to the slope of the needle, which is drawn to show the relative position of the needle and the looper at different positions.

FIG. 9 shows that the needle designated 1 is closest to the edge 4 of the fabric 5, while the needle designated 3 is further away from the edge 4. All the needles are held by a support member consisting of a clamp 6, and a mating screw 7 allows any of the needles to be removed.

Figure 11 shows two loopers cooperating with the needle:
That is, the lower looper 8 and the upper looper 9.

The lower looper 8 is placed next to the third needle 3 and can move until its tip exceeds the edge 4 of the fabric (Fig. 9), while the upper looper 9 is placed next to the first needle 1. on the same side,
It is placed on the outside of the fabric 5.

The upper looper 9 has a specific path and cannot cooperate with all needles, but can cooperate with the first two needles 1 and 2. Therefore, only the lower looper 8 is connected to the thread of the third needle.

The needle is inserted into a throat plate 10 (FIG. 12) which is suitably shaped to trim the fabric just before sewing.

The features of the embodiment shown in FIG. 11 are as follows: The structure and path of the lower looper 8 and upper looper 9 are roughly the same as an ordinary hem stitch sewing machine with only two needles. . The two needles referred to here correspond to the needles indicated by numerals 1 and 2.

In another embodiment of the present invention, in FIG.
Four needles are equipped, indicated at 13.14, where needle 11 is the closest needle to the edge 4 of the fabric 5.

There is a lower looper 15 which cooperates with all the needles, whereas an upper looper 16 can only move up to the needles 13 except the last needle 14 which is farthest from B4 of the fabric 5.

The sewing machine according to the invention is capable of performing a new type of overedge stitch, which is also a component of the invention. The first embodiment of the new overedge stitch is shown in Figures 7a and 7b, and the second embodiment is shown in Figures 88 and 8'b.
As shown in the figure. A first type of overedge stitch was obtained with a three-needle sewing machine according to the invention and is illustrated in FIGS. 9 and 11. On the other hand, the second pattern was obtained with a sewing machine having four needles and is shown in FIG.

The features of the new overedge stitches performed in these two embodiments will be described below.

The at least five threads (five threads in the first embodiment and six threads in the second embodiment) refer to at least three needle threads, a bobbin thread, and a needle thread.

The needle threads pierce the fabric, and a distinction is made between the first needle thread 17, which is placed close to the edge 4 of the fabric 5, and the last needle thread 17, which is placed at an edge spacing. The lower thread 18 exits the lower looper and exits onto the outer surface of the fabric. The bobbin thread appears to be connected to all of the above needle threads, and is tied to the upper thread at the edges of the fabric. Upper thread 1
9 comes out from the upper looper and straddles between the lower thread to be tied to it and the first thread except the last thread.

It should be noted that the needle threads are all parallel to each other and to the edge of the fabric, and that the first threads are all connected to the bobbin thread 18 and top thread 19.

The new overedge stitch embodiment seen in figures 7a and 7b shows two first threads 20.21, and the embodiment seen in figures 8a and 8b shows three first threads. Yarns 20, 21, 22 are shown.

The invention has achieved its intended objectives and has also achieved important advantages.

In fact, the sewing machine according to the invention is not only capable of performing new stitches, both those of the classification table and those currently in use, but also, surprisingly, of the previously known and previously used stitches. Figures 1a to 6a and 1b to 6b
All of the overedge stitches shown in the figure can be made.

In fact, if the sewing machine of the invention were arranged according to the three-needle embodiment, it would first of all be possible to perform the stitch shown in Figure 17a.

Since all the needles are removably attached to the clamp 6, remove or kill the third needle and attach the fourth needle to the sewing machine.
It is possible to perform 514 type stitches as shown in figures a or 4b.

Also, if the first needle 1 is removed or killed, a stitch of type 504 shown in FIG. 2a can be made. As a variant, stitches of the type 504 shown in FIG. 1a can be made with only needle 1.

On the other hand, if the third needle 3 is left and the first needle 1 or the second needle 2 is removed, 512 type stitches shown in Nos. 5a and 6a can be performed.

In fact, not only can this machine create new stitches, but it can also create all stitches except one, shown in Figure 3a. However, if you use a sewing machine based on the embodiment with four needles shown in Figure 10, this stitch can be easily performed, but it can also be done by omitting the two first and fourth needles. It is. Furthermore,
A four-needle machine can also perform all the other stitches that a three-needle machine can do.

Both of the two examples showing the newly devised stitches are characterized by not only strong strength due to the fact that many threads are tied together, but also wonderfully elegant shapes as shown in Nos. 7a and 7b. That's true.

New stitches also make it easy to tell which side of the fabric is on the wrong side, although the wrong side is also important.

In addition, the newly invented stitch produces a significant amount of thread, especially at the looper, so changes in the thickness of the fabric being sewn become less important.

In summary, a new sewing machine and the new stitches achieved with it have been devised, which give excellent results in terms of reliability and quality, and which ensure that all users are equipped with a single type of sewing machine. That's a good thing. This is because the sewing machine according to the invention can perform virtually any overedge stitch.

It is also important that the above-mentioned sewing machine has a simple structure similar to conventional sewing machines.

Various modifications and changes can be made to the present invention without departing from the spirit of the invention. Furthermore, all details can be replaced by technically equivalent elements. The materials, shapes and dimensions practically used may be of any kind and may be scaled up as required.

[Brief explanation of drawings]

No. 1a, 1b, 2a, 2b, 3a, 3b, 4a. Figures 4b, 5a, 5b, 6a, 6b show overedge stitches of the known type discussed above, and number 78,
Figures 7b, 8a and ab are based on two embodiments of the present invention,
Figures 9 and 10 show the new stitch pattern.
Figure 11 is a schematic diagram showing the movement of the upper and lower loopers in relation to the needle when making the stitches seen in Figures 8 and 7b and the stitches seen in Figures 8a and 8b;
As seen in Figure 7b, the stitching section is provided for stitching.
Perspective view showing important parts of the sewing machine based on the present invention, No. 12
The figure is a plan view of the needle plate used in the sewing machine shown in FIG. 11.

Claims (6)

[Claims] (1) In a multi-needle sewing machine for overcasting: at least three needles arranged parallel to each other based on a straight line (
1, 2, 3, 11, 12, 13, 14) and the above needles (1, 2, 3, 11, 12, 13, 14) and all the above needles (1, 2, 3,
11, 12, 13, 14) and the last looper (8, 15) which is used in conjunction with needle(
Apart from 3 and 14), a multi-needle sewing machine characterized by comprising an upper looper (9) that cooperates with the above-mentioned needle. (2) The lower looper (8) and the upper looper (9) are
The above two needles in a sewing machine having three needles (1, 2, 3) have a structure and a sewing path substantially similar to that of a two-needle serration sewing machine. A multi-needle sewing machine according to claim 1, characterized in that the needles correspond to the two needles (1, 2) closest to the edge (4) of the fabric (5) to be sewn. . (3) The multi-needle sewing machine according to claim 1, characterized in that it consists of four needles (11, 12, 13, 14). (4) In the overedge stitch obtained by a multi-needle sewing machine of the seam stitch type: piercing the fabric (5) to be sewn, and distinguishing according to the distance from the edge (4) of the fabric (5); First needle thread (20, 21, 22) and last needle thread (1
at least three needle threads consisting of (7) and a fabric (5);
The thread of the lower looper, that is, the lower thread (18), which exits on the outer surface of the fabric (5), and the upper thread (19) of the upper looper, which also exits on the outer surface of the fabric (5).
and at least five threads (17, 18, 19
, 20, 21, 22); the lower thread (18) is tied to the upper thread (19) at the edge (4) of the fabric (5), and the needle thread pierces the fabric (5). All the above needle threads (17,
20, 21, 22); the upper thread (19) connects with the lower thread (18) and the upper thread at the part where the needle thread pierces the fabric (5); , 21, 22); said first needle threads (20, 21, 22) are adjacent to each other and act parallel to the edge (4) of the fabric; Thread (19) all connected to both;
An overedge stitch characterized in that the last needle thread (17) is parallel to the first thread and connected only to the bobbin thread (18). (5) Five threads (17, 18, 19, 20, 21), namely two first needle threads (20, 21), one last needle thread (17), and a lower thread ( 18) and an upper thread (19). (6) Over-edge stitch has six threads (17,
18, 19, 20, 21, 22), namely, three first needle threads (20, 21, 22), one last needle thread (17), a lower thread (18), and an upper thread. (19) The overedge stitch according to claim 4, characterized in that it is obtained by (19).