JPS622069B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thread fraying prevention device for sewn products.
More specifically, the present invention relates to a device that can efficiently apply glue only to the stitches of the sewing machine in order to prevent the sewing thread from unraveling during the process before cutting a continuous sewn product.

In the process before cutting the sewn product, there has been a known device that can apply anti-raveling treatment to the cut portion of the sewn product in advance. It was a product in which a certain sewing thread was heat-welded to prevent the thread from unraveling (hereinafter referred to as "anti-raveling by heat treatment").

Therefore, with such a device, if a material with a lower melting point than sewing thread is used as the material for sewing, it is difficult to prevent the thread from fraying.
There are serious problems, such as the possibility that the material may be burned out at the same time when the sewing thread is welded.

By the way, in recent years, in order to reduce the cost of sewn products, nylon fibers called non-woven fabrics, which have a lower melting point than sewing thread, have been used as linings. It is becoming increasingly difficult to efficiently unravel sewing thread by heat treatment.

The present invention was made in view of the above circumstances, and in order to eliminate the problems mentioned above in the conventionally widely used heat treatment to prevent unraveling, it is possible to apply glue only to the perforations of the lining of the sewn product. To provide a device for preventing thread unraveling of a sewn article, which can efficiently prevent sewing thread from unraveling that occurs during cutting.

An embodiment of the apparatus of the present invention will be described in detail below with reference to the accompanying drawings. In FIG. In the example shown, a synthetic adhesive with excellent quick-drying properties that melts immediately when heated and immediately solidifies into a waxy state at room temperature is used as the glue, and the glue feed roller 11, roller 12, and tank are A hot wire heater is built into the adhesive 14, thereby keeping the adhesive 13 in a molten state at all times during operation of the device. Then, a roller 12 whose lower part is dipped in adhesive is interposed in the tank 14, and the glue feeding roller 1
1 is averaged.
That is, the glue feeding roller 11 adjacent to the roller 12
As shown in FIG. 2, protrusions 111 corresponding to the perforation threads of the sewn product are provided around the circumference in the circumferential direction, and between the circumferential surface of the protrusions 111 and the circumferential surface of the roller 12. , a minute gap smaller than the adhesive layer adhered to the roller 12 is formed, and the glue feeding roller 11
By connecting the rollers 12 with the chain 10 and rotating them in synchronization, the adhesive is uniformly applied to the circumferential surfaces of the protrusions 111.

Therefore, when the device is operated, the motor 7
It is easily understood that when the adhesive 13 is rotated in the direction of the arrow, the molten adhesive 13 is continuously supplied from the tank 14 through the roller 12 and adheres to the protrusions 111 of the glue feed roller 11. Good morning.

2 is a gluing roller, and a gluing roller 11
It is placed in a position opposite to.

This roller 2 is the protrusion 111 of the glue feed roller 11.
A disc-shaped flat roller 21 provided corresponding to...
Each roller 21... has an arm 26..., which is loosely fitted to the support shaft 5, and is further loosely fitted to the support shaft 5. By screwing the collar members 22 and 23 onto the spindle 5, the mounting position of each roller 21 is defined.

Further, an angle member 24 is extended from one collar member 23, and by adjusting an adjustment screw 25 of this angle member 24, this adjustment screw 24 can be adjusted.
By applying the elastic force of a spring 27 fitted to the rollers 5, the pressing force of the rollers 21 on the sewing material can be adjusted.

The gluing roller 2 shown in the embodiment is designed so that the position and pressing force of each flat roller 21 can be changed and adjusted independently, but in other embodiments, the gluing roller 2 is configured so that the position and pressing force of each flat roller 21 can be changed and adjusted independently. The rollers may be fixed so that each flat roller cannot be changed or adjusted independently, or the roller may be configured to have the same shape as the glue feeding roller.

The transfer roller mechanism 6 includes a transfer auxiliary roller 62 fixed to the support shaft 5 via an arm 63, and a transfer roller 61 provided close to the transfer auxiliary roller 62. It is connected to the glue feed rollers 11, 12, and roller 8 by a chain 10, and can be rotated in synchronization with these glue feed rollers 11 and the like by rotation of the motor 7. When the air cylinder 31 is operated, the transfer roller mechanism 6 moves the transfer auxiliary roller 62 simultaneously with the gluing roller 2 in a direction (first
(see the two-dot chain line in FIG. 2) to forcibly transport the sewing product 20.

Sewing product 20 with glue roller 2 and glue feed roller 11
A control means 3 for intermittently driving the gluing roller 2 forward and backward in order to pinch and press the sewn material 20 and glue the sewn material 20;
It includes an air cylinder 31 and an arm 33 connected to an actuating rod 32 of the air cylinder 31 and fixed to a support shaft 5.

The air cylinder 31 is actuated by receiving a command signal from a control circuit (not shown), and upon receiving a command signal from the control circuit, moves the actuating rod 32 to the state shown by the two-dot chain line. The arm 33 is rotated about the support shaft 5 to drive the gluing roller 2 and the transfer assisting roller 62 forward to the state shown by the two-dot chain lines, respectively.

Therefore, when the air cylinder 31 is actuated, the sewing material is pinched and pressed between the gluing roller 2 and the glue feed roller 11, and the perforations of the lining of the sewing material are subjected to the gluing process, and at the same time, the auxiliary transport roller 62 and the transport roller 61
Since the sewing material 20 is clamped and pressed, the perforations of the lining of the sewing material 20 are successively treated to prevent unraveling.

It goes without saying that in order to increase the working efficiency of the apparatus of the present invention, it is desirable to operate the air cylinder 6 to glue the sewn material when cutting it.

4 is rolling rollers 41 and 42 and a drive roller 4
4, 45, which defines the transfer path of the sewing material, and is necessary to drive the drive rollers 44, 45 to pass the sewing material one after another into the device. It is something.
42 of these rolling rollers can be moved up and down by a belt 421;
By adjusting the height position of the sewing machine, the cutting dimensions of the sewing product can be changed in various ways.

One embodiment of the device of the present invention is as described above,
In order to facilitate understanding of the present invention, the principle of operation of this embodiment will be briefly explained. The basic principle of operation of the device of the present invention is to When the air cylinder 31 is operated intermittently, the gluing roller 2
0 is pressed against the protrusions 111 of the glue feed roller 11, so that the glue is applied only to the parts of the lining of the sewing product that are in pressure contact with the protrusions 111. However, since the glue dries immediately at room temperature, The threads are prevented from unraveling at the perforations of the sewn product. Simultaneously with the operation of this gluing roller 2, the transfer auxiliary roller 6
2, the sewing material 20 is placed on the rotating transfer roller 61.
When pressed, the sewn article 20 is pinched and transferred by these two rollers 61 and 62, and as a result, the perforations 18 of the lining of the sewn article 20 are successively treated to prevent unraveling. After cutting, the sewn product is glued 16, 17 only at the necessary locations before and after the cutting line 15, as shown in FIG.

Based on this principle, the device of the present invention sequentially performs the treatment to prevent threads from unraveling while transporting the sewing material, so the glue feeding roller is moved in the direction of the gluing roller to apply glue to the sewing material 20. By adjusting the time for which this is done, the number of threads to be unraveled can be arbitrarily controlled.

From the above, the apparatus of the present invention has been sufficiently understood, and the apparatus of the present invention has the following effects.

(1) It is possible to safely prevent thread from unraveling even in sewn items made of materials with a lower melting point than sewing thread.

Unlike conventional heat treatment that welds sewing threads to prevent them from unraveling, this method does not require heat treatment, so it can be safely treated regardless of the material of the sewn item.

(2) The range to be treated to prevent yarn from unraveling can be set arbitrarily.

Since gluing is possible only when the sewn material is clamped and pressed by the gluing roller and the glue feed roller, the range to be treated to prevent yarn from unraveling can be changed by varying the clamping time.

(3) Good work efficiency Since the sewing material is pasted while being transported, high-speed processing using so-called assembly work is possible.

(4) Adhesive is evenly applied to the sewing item.

A minute gap is formed between the circumferential surface of the protrusion provided around the glue feeding roller and the circumferential surface of the roller whose circumferential surface is partially immersed in the adhesive in the tank, and the roller is placed around the circumferential surface of the protrusion. Since the adhesive is applied through the sewing machine, the amount of adhesive fed is averaged, and therefore the adhesive applied to the sewing product is also uniform.

(5) Parts other than the desired parts of the sewn product will not harden due to adhesion of the adhesive.

Since the adhesive adhered to the circumferential surface of the protrusion is applied to the sewn article, the adhesive is reliably prevented from adhering to areas other than desired locations on the sewn article.

(6) Ensure that the adhesive is applied to the sewing thread.

The adhesive is applied to the sewn material by pinching the sewn material at a position facing the protrusions, so the sewing thread comes into contact with the circumferential surface of the protrusions.
The adhesive attached to the circumferential surface of the protrusion is reliably applied to the sewing thread.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the device of the present invention, Fig. 2 is a diagram of an embodiment of a glue feeding roller and a gluing roller, and Fig. 3 is a view of a sewn product subjected to thread unraveling treatment by the device of the present invention. It is a perspective view showing the state after cutting. (Explanation of symbols) 1... Glue supply device, 2... Gluing roller, 3... Control means, 6... Transfer roller mechanism.

Claims (1)

[Claims] 1 A tank filled with adhesive, a roller whose circumferential surface is partially immersed in the adhesive in the tank and driven to rotate to adhere the adhesive to the circumferential surface, and a roller which is attached to the sewing thread of the sewing product in the circumferential direction. A large number of protrusions are provided around the protrusion, and the roller is rotated with a small gap formed between the protrusion and the roller, and the adhesive scooped up by the roller is spread around the protrusion. A sewing product that is fed between a glue feeding roller that adheres to the surface and the glue feeding roller that is driven forward and backward in the direction of the glue feeding roller and is driven forward toward the glue feeding roller side is opposed to the protrusion. a gluing roller that pinches and presses the adhesive adhered to the circumferential surface of the protruding stripes at a position to apply the adhesive adhered to the circumferential surface of the protrusion to the sewn product; a control means that intermittently drives the gluing roller in the direction of the glue feed roller; A device for preventing thread fraying of a sewn article, comprising a transfer roller mechanism configured to forcibly send out the sewn article each time it is pasted.