JPS59156375A - Stitching method and apparatus - 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 [Technical Field] The present invention relates to sewing products to be sewn, particularly textile products. The present invention relates to a suturing method in which stitches are sewn using a lock stitch or a plain stitch, and an apparatus for carrying out the method.

[Description of prior art]

Various sewing machines are known as conventional sewing devices for textile products. In conventional devices, a lockstitch sewing machine is used to create lockstitch-type stitches, and this lockstitch sewing machine requires a lid mechanism and a bobbin.

In a conventional hydroponic sewing machine, the needle thread is passed through the needle hole of the sewing machine needle, the needle is passed through the product to be sewn, and the passed needle thread is pulled out in a loop form under the product to be sewn.

The needle thread loop is hooked onto the hook tip of an inner hook containing a bobbin wound with a bobbin thread, and the inner hook is rotated.

This causes the loop of needle thread to pass around the bobbin as the hook rotates, forming a stitch. In such conventional devices, the needle up and down mechanism, the balance mechanism, the lid mechanism, etc. operate in a complicated manner. As described above, conventional sewing machines use various complicated mechanisms, so they cannot be made compact, and the lid mechanism requires oil supply, which requires time and effort to maintain. In addition, there was also the disadvantage that the sewn products were stained with oil due to the oil being supplied to the hook structure.

[Object of the present invention]

It is an object of the present invention to overcome the drawbacks of conventional sewing machines as described above.

The present invention is based on a completely different principle from conventional sewing methods, and creates stitches without using a conventional lid mechanism or a looper in a chainstitch sewing machine.

When sewing clothes according to the present invention, the length to be sewn in each turn (that is, the length to be sewn continuously at one time from the beginning of sewing to the cutting surface of the thread) is at most 120 to 100 mm at most.
30cm (for example, when sewing the side seams of pants),
It was noted that a thread length of about 150 cm is enough to form one stitch. In conventional sewing machines, the sewing thread used is long and continuous, but the thread used in the present invention has a predetermined length of 1, for example, 2111 or less. With conventional sewing machines, one sewing machine can only form one or two stitches at a time, and it is difficult to create multiple stitches at the same time with a certain distance between them, for example, 5 cm or more. I couldn't do it. The present invention aims to solve such problems as well.

[Configuration of the present invention]

The present invention aims to achieve the above-mentioned various purposes, including a step of pricking a thread guide needle into a product to be sewn, a step of feeding the sewing thread with an air flow into the thread guide needle to penetrate the product to be sewn, and a step of guiding the sewing thread with the air flow. A suturing method comprising a step of feeding the thread through the needle and returning it, a hollow thread guide needle which is a device for implementing this suturing method, a thread guide needle drive mechanism for moving the thread guide needle up and down, and the thread guide. This is achieved by a suturing device consisting of means for sending air into the needle and a pair of upper and lower suture guides.

The present invention will be described in detail below based on embodiments shown in the drawings.

[Explanation of Examples]

FIG. 1 is a perspective view showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a thread guide needle drive mechanism, which moves the thread guide needle 2 up and down. The thread guide needle 2 corresponds to a conventional needle, and as is clear from FIGS. 2 and 4, the thread guide needle 2 extends from the upper thread inlet 2a to the lower end thread outlet 2C by means of the hollow part 2b. It is a communicating hollow body, and a slit 2d is formed on its side surface.

An upper needle thread guide 3 is located opposite the thread entrance 2a side of the thread guide needle 2.
will be installed. The other end of the upper needle thread guide 3 is connected to the upper upper system guide tube 4. Although the upper needle thread guide tube 4 is straight in the drawing, it does not necessarily have to be straight.
Its length can be adjusted to any appropriate length.

The upper needle thread guide tube A is hollow, and its free end 4a is open. The thread can be fed from this free end 4a.

A nozzle 5 is provided near the exit of the upper needle thread guide 3. The nozzle 5 communicates with a compressed air control 1 mechanism 7 via a hose 6. Compressed air control mechanism 7 communicates via hose 8 to a source of compressed air (not shown). A lower needle thread guide 9 is installed below the thread guide needle 2. A lower needle thread guide tube 10 is connected to the lower needle thread guide 9, and a nozzle 1.1 is provided at the upper part of the lower needle thread guide 9.
The nozzle 11 communicates with the compressed air control mechanism 7 via a hose 12.

FIG. 3 is a sectional view taken along the line ■--■ in FIG. 4.

As shown in FIG. 3, a lower thread guide 13 is arranged on the side of the lower needle thread guide 9, and this lower thread guide 13 is rotated by a lower thread guide drive mechanism 14. In addition, in FIG. 1, the support stand for the product to be sewn is omitted.

The procedure for forming a lock stitch according to the present invention will be explained below with reference to FIGS. 4 to 8.

After the product to be sewn, such as cloth 23, 24, has been fed for a predetermined length, the thread guide needle 2 is lowered by the thread guide needle drive mechanism 1 and pierced into the product to be sewn 23, 24 (FIG. 4). As shown in FIG. 4, in this state, the free end of the needle thread 21 is passed through the upper needle thread guide 3 and the upper needle thread guide tube 4, and the other end is connected to the already formed comb. In addition, upper thread 2
1 is bobbin thread 2 in Figures 4 to 8? They are shown with diagonal lines to make them easier to distinguish. on the other hand,
The free end of the bobbin thread 22 is passed through the bobbin thread guide 13. The lower thread guide 13 is in a state where its tip portion 13a is horizontal, and the lower thread guide needle 2 and the lower thread guide 13 are in a horizontal state. 13 in the horizontal direction is as shown in FIG.

Next, compressed air is injected from the nozzle 5 through the hose 8, the compressed air control mechanism 7, and the hose 6 toward the hollow portion 2b of the thread guide needle 2. The injected compressed air flows from the thread inlet 2a of the thread guide needle 2 through the thread outlet 2C to the lower needle thread guide 9 and the lower needle thread guide cylinder 10. Also, nozzle 5
Air flow toward the thread guide needle 2 is also generated within the upper needle thread guide 3 and the upper needle thread guide cylinder 4 due to the ejector effect caused by the air flow from the needle 1 . The upper thread 21 is moved by the air flow in the upper needle thread guide 3 and the upper needle thread guide cylinder 4 and the air flow from the nozzle 5, and passes through the hollow part 2b of the thread guide needle 2 and the lower needle thread guide 9 and the lower thread guide 9. It is moved to the side needle thread guide tube 10, and finally the entire length enters the lower needle thread guide 9 and the lower needle thread guide tube 10 as shown in FIG.

From this state, the bobbin thread guide 13 that guides the bobbin thread 22
is rotated by the bobbin thread guide drive mechanism 14 so that its tip portion 13a is vertical. When the bobbin thread guide 13 rotates in this way, the needle thread 21 is pulled by the bobbin thread 22 extending from the already formed stitch to the bobbin thread guide tip 13a, and the thread path is bent as shown in FIG. .

Next, compressed air is injected from the nozzle 11.

This compressed air flows through the interior of the thread guide needle 2 to the upper needle thread guide 3' and the upper needle thread guide tube 4.

Due to the airflow ejected from the nozzle 11, airflow toward the thread guide needle 2 is also generated within the lower needle thread guide 9 and the lower needle thread guide tube 10. Under the influence of these airflows, the needle thread 21 is again sent back through the hollow portion 2b of the thread guide needle 2 to the upper needle thread guide 3 and the upper needle thread guide tube 4.

Then, as shown in FIG. 8, the thread guide needle 2 is raised by the thread guide needle drive mechanism 1. As the thread guide needle 2 rises, the upper thread 21a of the stitch being formed passes through the slit 2 of the thread guide needle 2.
Pull it out of thread guide needle 2 from d. Meanwhile, the lower thread guide 13 returns to its initial position. In this way, a lockstitch seam is formed. Thereafter, the products 23 and 24 are moved in the direction of arrow B in FIG. And the lid number 4
The next cycle shown in the figure begins.

In the above-described apparatus, the compressed air controller ti7 has a switching valve inside and controls the supply of compressed air to the nozzles 5 and 11.

Further, in the above-described embodiment, the lower thread guide 13 was described as rotating, but instead of rotating, the lower thread guide 13 is made movable in the lateral direction, and the upper thread 21 and the lower thread 2
may be made to intersect.

Further, the nozzle 5 and the nozzle 11 are not limited to those shown in the drawings, but it is more effective if they have a double structure surrounding the upper needle thread guide 3 and blow out air from their tips. Also, the upper 2 threads 21 are attached to the upper needle thread guide tube 4.
In order to pass the thread, air is injected from the nozzle 5 to create a suction air flow at the free end 4a of the upper needle thread guide tube 4 due to the ejector effect, and by simply bringing the thread 21 close to the free end 4a, the thread passes through the upper needle thread guide tube. 4 and the upper side-F can be threaded into the thread kite 3.

The stitches formed in the embodiments described above are lock stitches, but next, a case will be described in which a stitch similar to hand stitching is formed.

When forming seams similar to hand sewing, only one sewing thread is required. Therefore, in the apparatus shown in FIG. 1, the lower thread guide 13 and the lower thread guide drive mechanism 14 are not necessary. When forming a seam that is the same as a hand-sewn seam, first
As shown in the figure, the thread guide needle 2 is lowered and the product to be sewn 23.
Stick to 24. Next, as shown in FIG. 5, compressed air is blown out from the nozzle 5 to guide the needle thread 21 into the lower needle thread guide 9 and the nozzle 11.

Next, unlike the previous embodiment, the thread guide needle 2 is raised. After the workpieces 23 and 24 have been fed and moved by one stitch, the thread guide needle 2 is lowered again.

Next, compressed air is blown out from the nozzle 11 to remove the upper thread 2 that has been passed through the lower upper thread guide 9 and the lower upper thread guide tube 10.
1 is not blown back to the upper needle thread guide 3 and upper needle thread guide tube 4 again. Next, the thread guide needle 2 is raised, and the workpiece 2 is again
Send 3.24.

With this method, it is possible to form hand-sewn seams that were impossible to form using conventional sewing machines.

(Effects of the present invention) According to the present invention, since the thread is simply moved up and down within the hollow thread guide needle using compressed air, the mechanism is simple and the number of parts is greatly reduced, making the device easier to use. Can be made smaller. Therefore, the device of the present invention is easy to carry and move. Furthermore, since the device of the present invention has a simple mechanism, a large number of devices can be installed in close proximity. Since compressed air is used, control is easy and reliable, and it is also possible to sew multiple stitches at desired intervals at the same time.

In addition, when sewing at high speed with conventional sewing machines, heat is generated due to friction when the needle penetrates the fiber [1 item], and the needle becomes hot, which can lead to thread breakage if the sewing thread is synthetic RH thread. was. According to the present invention, since compressed air flows through the thread guide needle, the needle is cooled by the compressed air, so that there is little temperature rise due to frictional heat, and there is no possibility of thread breakage or adverse effects on the product.

According to the present invention, it is possible to form lockstitch stitches in the same way as conventional sewing machines, or it is also possible to form stitches that are the same as hand-stitched stitches. Therefore, the device of the present invention has a very wide range of applications for sewing products.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the apparatus of the present invention. FIG. 2 is a front view of a thread guide needle used in the device of the present invention. FIG. 3 is a sectional view taken along the line 2--m in FIG. 4, showing the positional relationship between the thread guide needle, the lower upper thread guide, and the lower thread guide. FIGS. 4 to 8 are cross-sectional views showing the order of the suturing process. 1... Thread guide needle drive mechanism, 2... Thread guide needle, 3...
・Upper needle thread guide, 4...Upper needle thread guide tube, 5.
... Nozzle, 6... Hose, 7... Compressed air control mechanism, 8... Hose, 9... Lower needle thread guide, 10... Lower needle thread guide tube, 11... nozzle,
12... Hose, 13... Lower thread guide, 14... Lower thread guide drive mechanism, 21... Upper thread, 22... Lower thread, 23.
24...Product to be sewn

Claims (1)

[Scope of Claims] 1. A step of pricking a thread guide needle into a product to be sewn; a step of feeding the sewing thread into the thread guide needle with an air flow to penetrate the product to be sewn; and a step of pricking the sewing thread with the thread guide needle by the air flow. A suturing method characterized by a step of sending it back through the thread, and a suturing method. 26. The suture according to claim 1, wherein the sewing thread is a needle thread, and the needle thread is passed through the thread guide needle and passed through the product to be sewn, and then fed back through the thread guide needle in a state where it intersects with the bobbin thread. Method 3 is characterized by comprising a hollow thread guide needle, a thread guide needle drive mechanism for moving the thread guide needle, means for sending air into the guide needle, and a pair of upper and lower sewing thread guides. Suturing device. 4. The sewing thread guide is for guiding either the upper thread or the lower thread, and includes a thread guide for guiding the other thread and a drive mechanism for moving the thread guide. A suturing device according to claim 3.