KR102298054B1 - Method of forming stitch - Google Patents

Abstract

The present invention relates to a stitch forming method using a stitch forming apparatus, comprising: a first needle reciprocating along a first motion path while a thread is threaded; And the position is set so that the object to be sewn is positioned between the first needle and the second movement path intersecting the first movement path, and reciprocates along the second movement path, and catches the thread of the first needle and pulls the thread loop. In the method for forming a stitch using a stitch forming apparatus comprising: a second needle for forming 1 penetrating step; After the second needle advances along the second motion path from a first position spaced from the first needle to a second position intersecting the first needle to capture the thread of the first needle in the penetrating position, a first seal loop forming step of forming a first seal loop by retreating along the second motion path from a second position to the first position and performing a seal loop forming motion of pulling the thread to form a seal loop; and a moving object moving step in which the object to be sewn moves so that the first needle retracts to the retracted position, and the first seal loop moves to surround the outer circumferential surface of the second needle. .

Description

Stitch forming method {METHOD OF FORMING STITCH}

The present invention relates to a stitch forming method using a stitch forming apparatus.

Various methods are disclosed and used in order to impart elasticity to objects to be sewn such as cotton, non-woven fabrics, and the like. Among them, a method of forming a stitch using a yarn such as an elastic yarn is included. In the stitch formation process, there is a process in which the elastic yarn is pulled, and by this process, the elastic yarn penetrating the object to be sewn has a contracting force. The elasticity imparted to the object to be sewn is due to the contractile force of this elastic yarn. Accordingly, the to-be-sewn object maintains a slightly contracted state, stretches when an external force is applied, and then restores the original state by the contractile force of the elastic yarn.

The stitched product is also used as a wound dressing by coating a specific material on the outer surface. Wound dressings are wet dressings that are attached to the wound site to maintain the wet state of the wound site and serve to effectively treat the wound. In addition, the wound dressing should have sufficient elasticity to compress the wound area with an appropriate pressure for effective wound healing.

For such sufficient elasticity, stitches formed on the object to be sewn are formed in various shapes, one of which is a chain shape. In order to form a chain-shaped stitch, as disclosed in Korean Patent No. 10-0730419, a thread loop is formed by inserting a thread and penetrating the to-be-sewn object, capturing the thread from the needle, and pulling the captured thread. A method using a rotary looper is being used.

However, this method has a problem in that manufacturing and maintenance costs are high due to a complicated configuration in which a rotary looper is used.

An object of the present invention is to provide a method of forming a chain stitch by combining a conventional simple configuration without using a rotary looper through an embodiment.

The present invention provides a first needle reciprocating along a first motion path while a thread is threaded in order to solve the above problems; And the position is set so that the object to be sewn is positioned between the first needle and the second movement path intersecting the first movement path, and reciprocates along the second movement path, and catches the thread of the first needle and pulls the thread loop. In the method for forming a stitch using a stitch forming apparatus comprising: a second needle for forming 1 penetrating step; After the second needle advances along the second motion path from a first position spaced from the first needle to a second position intersecting the first needle to capture the thread of the first needle in the penetrating position, a first seal loop forming step of forming a first seal loop by retreating along the second motion path from a second position to the first position and performing a seal loop forming motion of pulling the thread to form a seal loop; and a moving object moving step in which the object to be sewn moves so that the first needle retracts to the retracted position, and the first seal loop moves to surround the outer circumferential surface of the second needle. .

The stitch forming apparatus may include a slider that is detachably provided on the second needle; and a hook provided at the tip of the second needle to catch the thread and opened and closed by the slider, wherein in the step of moving the to-be-sewn object, when the to-be-sewn object moves, the slider is stored in the second needle. It is possible to open the hook while holding.

a second penetrating step in which the first needle advances from the retracted position to the penetrating position; and a second seal loop forming step in which the second needle performs the loop forming motion to form a second seal loop.

A chain in which the second needle moves from the first position to the third position so that a chain shape is formed as the second seal loop captured by the second needle passes through the space surrounded by the first seal loop. It may further include a pattern forming step.

In the chain pattern forming step, when the second needle is retracted, the hook may be closed while the slider is withdrawn from the second needle.

As described above, according to the embodiment of the present invention, it is intended to provide an effect of reducing costs as a chain stitch is formed by a combination of an existing simple configuration without using a rotary looper.

1 is a view showing a needle used in a stitch forming apparatus according to an embodiment of the present invention.
2 to 11 are views sequentially illustrating a stitch forming method by the stitch forming apparatus shown in FIG. 1 .

It should be understood that the embodiments described below are illustratively shown to aid understanding of the invention, and the present invention may be implemented with various modifications different from the embodiments described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.

The first and second terms used in the present application may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, the terms used in the present application are only used to describe specific embodiments, and are not intended to limit the scope of rights. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this application, terms such as "comprises", "consists of" or "consisting It should be understood that this does not preclude the possibility of addition or existence of further other features or numbers, steps, operations, components, parts, or combinations thereof.

1 is a view showing a needle used in a stitch forming apparatus according to a yarn (Y) embodiment of the present invention. Referring to FIG. 1, the stitch forming apparatus according to the embodiment of the present invention includes a first needle 100 and a first movement path that reciprocate along a first movement path while the thread Y is threaded. The second needle 300 reciprocates along the intersecting second motion path, and forms a thread loop by capturing and pulling the thread Y of the first needle 100 .

The first needle 100 includes a first needle body 110 and a holding part 130 provided at the rear end of the body of the first needle 100 .

The first needle body 110 is formed to be elongated, and a cross section transverse to the longitudinal direction is formed to have a constant shape.

The first needle body 110 has a tip-shaped needle tip 111 at its tip to facilitate penetration of the to-be-sewn object F, and a tapered region 115 in which the cross-sectional area gradually increases from the needle tip 111 toward the rear end. ) is provided.

The first needle body 110 is provided with a needle hole 113 through which the thread (Y) is passed. The needle hole 113 may be provided in the tapered area 115 or provided at a point spaced apart from the tapered area 115 toward the rear end of the first needle body 110 .

The first needle body 110 is provided with a concave portion 117 formed by being concavely recessed so that the second needle 300 can pass on one side. A depth value of the concave portion 117 may be formed to be greater than a thickness value of the second needle 300 .

The holding unit 130 is connected to a driving unit (not shown) to receive a driving force that causes the first needle 100 to reciprocate. The structure in which the first needle 100 reciprocates by the driving unit corresponds to a known technique and thus a description thereof will be omitted. The holding part 130 has a cross-sectional area greater than that of the first needle body 110 .

The second needle 300 includes a second needle body 310 , a hook 320 , and a slider 370 .

The second needle body 310 is elongated and includes a chest (chest, 340) having an increased cross-sectional area from the front end provided with the hook 320 to the rear end.

The chest 340 includes a region in which the cross-sectional area increases and a region in which the cross-sectional area is maintained constant. The area in which the cross-sectional area increases is formed so that the outer surface is inclined, and the area in which the cross-sectional area is kept constant is formed in a direction parallel to the longitudinal direction of the second needle body 310 . The portion where the slope of the outer surface is formed forms a predetermined acute angle with the longitudinal direction of the second needle body.

The outer surface of the region in which the cross-sectional area increases and the outer surface of the region in which the cross-sectional area is kept constant are connected by a gentle curve.

The hook 320 is provided at the distal end of the second needle body 310, and is shown in a constant shape in FIG. 1, but is not limited in shape as long as it can capture the thread (Y).

The chest 340 is provided with a slider groove 330 in the form of a long groove formed by recessing the outer surface along the longitudinal direction of the second needle body 310 . The slider groove 330 is formed over the outer surface of the area in which the cross-sectional area of the chest 340 increases and the outer surface of the area in which the cross-sectional area is kept constant. Accordingly, the slider 370 may be accommodated in the slider groove 330 in the longitudinal direction of the second needle body 310 in the tip region of the second needle body 310, for example. When the slider 370 is stored in the second needle body 310 , the cross-sectional area of the chest 340 does not protrude outside the region where the inclination is formed.

Hereinafter, a stitch forming method using the stitch forming apparatus will be described in detail with reference to FIGS. 2 to 11 . 2 to 11 are views sequentially illustrating a stitch forming method by the stitch forming apparatus shown in FIG. 1 .

2 to 11 , in the method of forming a stitch, a first penetrating step in which the first needle 100 passes through the to-be-sewn product F together with the thread Y, and the second needle 300 is the first needle ( A first thread loop (L1) forming step of forming a first thread loop (L1) by capturing and pulling the thread (Y) of 100), a moving object moving step in which the to-be-sewn object F moves, and a first needle 100 ) passes through the object to be sewn (F) again together with the thread (Y), the second needle 300 catches the thread (Y) of the first needle 100 and pulls the second thread loop ( A second seal loop forming step of forming L2) and a moving chain pattern forming step of forming a chain stitch on the object to be sewn (F) are included.

In the first penetrating step, as shown in FIGS. 2 and 3, the first needle 100 advances along the first movement path from the retracted position to the penetrating position through the to-be-sewn object F together with the thread Y. The action is performed.

The retracted position is a state in which the first needle 100 does not penetrate the object to be sewn (F). As shown in FIGS. 2, 4, 5, 7, 8, 10, and 11, the retracted position is that both the front end and the rear end of the first needle 100 are in one area (the left area in the drawing) of the to-be-sewn product F. is located.

The penetration position is a state in which the first needle 100 penetrates the object to be sewn (F). As shown in FIGS. 3, 6, and 9 , in the penetrating position, the rear end of the first needle 100 is located in one area (the left area in the drawing) of the object F to be sewn, and the front end of the first needle 100 is closed. It is in a state of being located in the other area (the right area in the drawing) of the offering (F).

At the penetrating position, a tensile force is applied to the thread Y threaded through the first needle 100 while both ends are in one region. A part of the yarn Y spans the concave portion 117 .

The first movement path is a path that the first needle 100 follows when the first needle 100 moves from the retracted position to the penetrating position or vice versa. The first movement path may be, for example, an imaginary straight line crossing the to-be-sewn object F.

In the first penetrating step, the second needle 300 is set at the first position. 2, 4, and 5, when the first needle 100 moves along the first motion path, the second needle 300 does not interfere with the first needle 100. 1 It is a position spaced apart from the movement path along the movement direction of the to-be-sewn object (F). At this time, the second needle 300 is spaced apart from the first needle 100 . Here, the movement direction of the to-be-sewn object F is a downward direction in the drawing, and for example, may be a direction from the front end of the second needle 300 to the rear end.

When the first needle 100 is in the retracted position in the first penetrating step, the slider 370 of the second needle 300 may be withdrawn as shown in FIG. 2 , but is not limited thereto.

As shown in FIGS. 3 and 4 , the first seal loop L1 forming step is performed along the second movement path from the first position spaced apart from the first needle 100 to the second position. The first seal loop L1 is performed by moving forward and capturing the thread Y, then retreating along the second motion path from the second position to the first position, and pulling the thread Y to form a seal loop. ) is formed.

The second motion path is a path that intersects the first motion path, and may be, for example, a direction parallel to the to-be-sewn object F, but is not limited thereto. In addition, the second movement path is a path passing through the concave portion 117 of the first needle 100 set in the penetrating position.

The second position is a position set by moving the second needle 300 along the second movement path from the first position or the third position, and the second needle 300 intersects the first needle 100 at the penetrating position. This is the position to capture the thread (Y).

On the other hand, the third position to be described later is a position set by moving the second needle 300 along the second motion path from the first position or the second position, as shown in FIGS. 8 and 11 , and the second loop L2 ) passes through the first loop (L1) or the third loop (L3) passes through the second loop (L2), the second needle 300 is sufficiently moved from the first position in the direction in which the to-be-sewn object (F) moves It is a position spaced apart from the first position (L1).

In the step of forming the first seal loop L1 , the slider 370 is in a state accommodated in the second needle 300 when the thread Y is captured by the hook 320 , and the second needle 300 is retracted. At the time, it is possible to maintain a state that is received or drawn out in the second needle 300 .

In the step of moving the object to be sewn, as shown in FIG. 5 , in a state in which the first needle 100 is retracted to the retracted position, the first seal loop L1 moves to surround the outer circumferential surface of the second needle 300 . This is the stage in which the offering (F) is moved.

When the first needle 100 is retracted to the retracted position, the first opening OP1 is formed in the to-be-sewn product F. A part of the first seal loop L1 is accommodated in the first opening OP1.

In the step of moving the object to be sewn, the second needle 300 maintains the state set in the second position, and the slider 370 is set in the received state.

When the object to be sewn F moves, the first seal loop L1 together with the first opening OP1 moves downward in the drawing. In this case, the first seal loop L1 moves along the inclined surface of the chest 340 from the inner circumferential surface of the hook 320 and is located in a region where the cross-sectional area of the chest 340 is maintained constant. That is, the first seal loop L1 is set at a position surrounding the outer peripheral surface of the second needle body 310 .

The second penetrating step is a step in which the first needle 100 advances from the retracted position to the penetrating position as shown in FIG. 6 , and is the same as the operation of the first needle 100 in the first penetrating step.

The second seal loop forming step is a step in which the second needle 300 performs a loop forming motion to form the second seal loop L2 as shown in FIG. 6 . In the second seal loop forming step, unlike the first seal loop L1 forming step, the second needle 300 is wrapped by the first seal loop L1.

7 shows a state in which the second seal loop L2 is formed by the retracting operation of the first needle 100, but is not limited thereto, and the second needle 300 moves from the first position to the second position. and forming the second seal loop L2 by the operation.

When the first needle 100 is retreated in the second seal loop forming step, the second opening OP2 is formed as shown in FIG. 8 . The second seal loop L2 is partially connected to the second opening OP2. Accepted.

In the moving chain pattern forming step, as shown in FIG. 8 , the chain shape changes as the second seal loop L2 captured by the second needle 300 passes through the space surrounded by the first seal loop L1 . It is a step of moving the second needle 300 from the first position to the third position so as to be formed.

The third position is a position spaced apart from the first position in the downward direction in the drawing, that is, in the direction in which the to-be-sewn object F moves.

In the chain pattern forming step, the hook 320 is closed while the slider 370 is drawn out from the second needle 300 when the second needle 300 is retracted. Accordingly, when the second needle 300 retreats from the first position to the third position, the first seal loop L1 moves along the outside of the slider 370 while wrapping the outer peripheral surface of the second needle body 310 . In the end, the second needle 300 is separated from the second needle 300 through the tip.

Thereafter, the to-be-sewn object F moves again in the downward direction in the drawing as shown in FIG. 9 , and accordingly, the first seal loop L1 and the second seal loop L2 also move.

The first needle 100 passes through the to-be-sewn object F while moving from the retracted position to the penetrating position.

The second needle 300 captures the thread Y of the first needle 100 while being wrapped by the second thread loop L2 .

The first needle 100 in which the thread Y is captured is retracted to the retracted position again as shown in FIG. 10 . The third opening OP3 is formed by the operation of the first needle 100 retreating to the retracted position, and the third seal loop L3 is formed. Like the second seal loop L2 , the third seal loop L3 may be formed by a retreating operation from the second position of the second needle 300 to the first position.

The second needle 300 closes the hook 320 by drawing out the slider 370 while capturing the third seal loop L3.

Thereafter, the third seal loop L3 passes through the second seal loop L2 as the second needle 300 moves to the third position.

After that, these operations are continuously repeated.

The first needle 100 and the second needle 300 described above may each be made of the same number of plural, and accordingly, a plurality of the same number of seal loops may be formed through each step.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

100: first needle
113: needle hole
117: concave
300: second needle
320: hook
330: slider groove
340: chest
370: slider

Claims (5)

One or more first needles reciprocating along the first movement path while the thread is threaded; And the position is set so that the object to be sewn is positioned between the first needle and the reciprocating movement along a second movement path formed along a virtual straight line so as to intersect the first movement path, and the thread of the first needle In a stitch forming method using a stitch forming apparatus comprising a; one or more second needles forming a seal loop by capturing and pulling the
a first penetrating step in which the first needle advances along the first movement path from a retracted position to a penetrating position where the first needle passes through the to-be-sewn object together with a thread;
After the second needle advances along the second motion path from a first position spaced apart from the first needle to a second position intersecting the first needle to capture the thread of the first needle in the penetrating position; a first seal loop forming step of forming a first seal loop by retreating along the second motion path from a second position to the first position and performing a seal loop forming motion of pulling the thread to form a seal loop;
Movement of the to-be-sewn object moving in a direction parallel to the retreating direction of the second needle so that the first needle retracts to the retracted position, and the first seal loop moves to surround the outer circumferential surface of the second needle step;
a second penetrating step in which the first needle advances from the retracted position to the penetrating position;
a second seal loop forming step in which the second needle performs the seal loop forming motion to form a second seal loop while the first seal loop surrounds the outer circumferential surface of the second needle; and
A chain in which the second needle moves from the first position to the third position so that a chain shape is formed as the second seal loop captured by the second needle passes through the space surrounded by the first seal loop. Including; pattern forming step;
The first needle is provided with a concave portion formed by being concavely recessed so that the second needle can pass on one side,
The second movement path passes through the concave portion of the first needle set at the penetrating position. According to claim 1,
The stitch forming apparatus may include a slider that is detachably provided on the second needle; and a hook provided at the tip of the second needle to catch the thread and opened and closed by the slider;
In the step of moving the object to be sewn, the hook is opened while the slider is accommodated in the second needle when the object to be sewn is moved. delete delete 3. The method of claim 2,
In the chain pattern forming step, the hook is closed while the slider is withdrawn from the second needle when the second needle is retracted.

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