KR101801778B1 - Thread suction and fix device of sewing machine - Google Patents

Abstract

The present invention provides a thread suctioning and fixing apparatus (100) which sucks and fixes an end portion of a thread remaining in a needle, after sewing is over and the tread is withdrawn and thermally cut, and sews with a thread supplied in a state where remaining thread does not exist, such that the thread is not tangled in a bottom surface of a solid fabric, and smoke and odors generated when the thread is thermally cut can be removed. The apparatus comprises: a main body (110) in which a thread suctioning passage (111) is vertically penetrated; a thread suctioning passage opening/closing unit which is installed in the main body (110) and opens/closes the thread suctioning passage (111); and a suctioning compressed air supplying unit (130) which supplies suctioning compressed air to an upper part of the thread suctioning passage (111) and the thread suctioning passage opening/closing unit. When suctioning compressed air is supplied from the suctioning compressed air supplying unit (130), the thread suctioning passage opening/closing unit opens the thread suctioning passage (111), and through a lower part of the thread suctioning passage (111), sucks and removes a cut thread, then stays remaining thread after cutting in the thread suctioning passage (111). When the suctioning compressed air supplying unit (130) stops supplying suctioning compressed air, the thread suctioning passage opening/closing unit closes the thread suctioning passage (111), and grabs and fixes remaining thread on the thread suctioning passage (111) and continues sewing.

Description

Technical Field [0001] The present invention relates to a thread suction and fix device,

More particularly, the present invention relates to a yarn sucking and fixing apparatus for sucking an end of a yarn after cutting a yarn, .

In the sewing machine, in order to solve the problem that the appearance of the sewing thread is not good because the end of the sewing thread remains at the original sewing thread and the remaining thread is long at the sewing thread end, And a yarn cutting device for cutting the yarn by bringing the yarn into contact with the yarn drawn out by heating by flowing a current through the heating element.

FIG. 1 is a view showing an operation state of an upper thread pulling-out apparatus in a conventional thread cutting apparatus, FIGS. 2A and 2B are diagrams showing an operating state of a heat ray line apparatus and a state of an upper thread cut by a heat line apparatus in a conventional thread cutting apparatus admit.

As shown in Fig. 1, in order to take out the sewed yarn, first, when the mover is transmitted from the link arm 64 to the upper thread draw-out arm 66, The drawing arm 66 is rotated about the single screw 68a and the needle thread 8a is caught at the leading end 66a thereof to be released between the needle 6 and the clamping member 12. As a result, the needle chamber 8a required for the next sewing after the thread cutting is left on the needle side.

2A, the thermal conductive bar 26 and the heat transfer plate 32 are moved in the direction F and the heat transfer plate 32 having joule heat is brought into contact with the needle chamber 8 do. The needle chamber 8 is brought into contact with the heat transfer plate 32 to form a needle chamber 8a on the needle 6 side as shown in Fig. 2B.

On the other hand, a seatbelt, i.e., a seatbelt, is provided for each seat to restrain the occupant's body and to secure the occupant's safety in the event of a vehicle collision.

The fabric of the seat belt has a structure in which specific fibers are woven in at least two or three directions differently from one direction to maintain strength, and the density is so high that they are not stretched or broken in a direction in which the force is applied.

2B, since the yarn remaining in the needle is sewn next, the yarn remaining in the needle is stuck to the upper surface of the fabric at the next sewing Not only is it difficult to remove the residues from the bottom while gathering with the bottom thread after the passage, it also becomes rugged and the appearance becomes worse.

When heat is applied to cut the upper thread after sewing, the upper thread, which is made of synthetic resin, is cut off and smoke and smell are generated, which adversely affects the operator.

Patent No. 0685063 (Name of the invention: yarn cutting device)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a sewing machine for sewing a sewing thread to a sewing thread, And a yarn sucking and fixing device which removes the smoke and odor generated when the yarn is cut, while keeping the yarn in a loose state on the underside of the yarn.

In order to solve the above problems, the present invention provides an apparatus for suctioning and fixing a yarn drawn by crossing an up-down movement path of a sewing needle after sewing and a yarn withdrawn near the fabric, A main body 110 formed to pass through; A suction inlet passage opening / closing unit installed in the main body 110 for opening and closing the actual suction inlet passage 111; And a suction compressed air supply part (130) for supplying suction compressed air to the upper part of the actual suction path (111) and the actual suction path opening and closing part. When the suction compressed air is supplied from the suction compressed air supplying part (130) , The yarn suction and discharge passage opening and closing part is operated to maintain the open state of the yarn suction inlet passage 111. At this time, the yarn cut through the lower part of the yarn suction inlet passage 111 is sucked and removed, When the supply of the suction compressed air is stopped in the suction compressed air supply part 130, the actual suction path opening / closing part operates to maintain the closed state of the actual suction path 111, And the remaining thread staying on the actual suction inlet passage (111) is held and fixed so that the next sewing can be performed.

Preferably, the actual suction passage opening / closing portion is operated to maintain the opened state of the actual suction inlet passage 111 only when the suction compressed air is supplied from the suction compressed air supply portion 130, and when supply of the suction compressed air is stopped The single acting cylinder 120 is operated to maintain the closed state of the actual suction inlet passage 111 while returning by the elasticity.

According to the yarn sucking and fixing apparatus of the present invention having the above-described solution, when the sewing thread is pulled out and thermally cut, the yarn remaining in the yarn is supplied while the yarn remaining in the yarn is sucked and fixed, After that, the end of the remaining thread is fixed on the needle, and the remaining thread is not sewn. Then, the thread is sewn to the thread to be supplied, so that the yarn is not left on the underside of the fabric and not only the thread but also the smoke and odor generated during cutting are removed. It is possible to obtain an effect of improving the strength.

1 is a view showing an operation state of an upper thread draw-out apparatus in a conventional thread cutting apparatus,
FIGS. 2A and 2B are views showing the operating state of the heating wire device and the state of the upper thread cut by the heating wire device in the conventional yarn cutting device,
3 is a view showing a state in which a yarn suction and fixture device according to an embodiment of the present invention is installed on a sewing machine,
FIGS. 4A and 4B are cross-sectional views of a suction and suction device according to an embodiment of the present invention,
5A to 5I are diagrams showing the entire process from the start of sewing to the fabric to the cutting of the yarn and the suction and fixing of the cut yarn,
FIGS. 6A to 6D are cross-sectional views of a yarn suction and fixture device according to an embodiment of the present invention when yarns are cut in a sucked state after the tail yarn is started to be sewn, ,
7 is a view showing the sewing state of the underside of the fabric according to the embodiment of the present invention, with or without a suction suction device.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be described in detail in order to facilitate a person skilled in the art to which the present invention belongs. And does not mean that the technical idea and scope of the present invention are limited. Terms used to define relative positions such as front and rear, left and right, top and bottom, and inside and outside are based on the attached drawings.

FIG. 3 is a view showing a state in which a yarn suction and fixing device according to an embodiment of the present invention is installed on a sewing machine, FIGS. 4A and 4B are sectional views of a yarn suction and fixing device according to an embodiment of the present invention, Figs. 5A to 5I are diagrams showing the entire process from the start of sewing on the fabric to the cutting of the yarn and the suction and fixing of the cut yarn.

3, the yarn suction and fixture apparatus 100 according to the embodiment of the present invention is provided at the rear side where the needle bar 210 of the sewing machine 200 and the needle 220 are positioned, The thread take-out means 270 installed on the left side pulls out the thread 230 while traversing the up and down movement path of the needle 220, and the thread cut- The end of the thread 231 remaining on the needle after the heat cutting is placed near the fabric 260 pressed and fixed by the presser foot 250 by suction.

4A and 4B, the actual suction and fixture apparatus 100 according to the embodiment of the present invention includes a main body 110, a single acting cylinder 120 as a chamber suction opening and closing unit, and a suction compressed air supply unit 130 ).

The main body 110 has a hollow cylindrical body, and a thread suction passage 111 is formed through the upper and lower portions.

The single acting cylinder 120 is composed of a body 121, a piston 122 and a spring 123. Suctioned compressed air is supplied to only one side of the piston 122, And the restoring action is effected by the spring 123.

The single acting cylinder 120 may be inclined at one side of the actual suction passage 111 of the main body 110. The suction compressed air supplied from the suction compressed air supply unit 130 may be supplied to the inside of the body 121 As shown in FIG. 4A, the piston 122 is moved upward to maintain the open state of the actual suction inlet passage 111.

At this time, the spring 123, which is buried in the body 121, extends to the other end of the body 121. Here, one end of the body 121 and one end of the piston 122 maintain a coupled state.

In contrast, when the supply of the suction compressed air is interrupted, the piston 122 is reduced to one end of the body 121 by the elastic force of the spring 123, and returned to the original state as shown in FIG. 4B Thereby maintaining the closed state of the actual suction inlet passage 111. [

The suction compressed air supply unit 130 supplies suction compressed air to the upper portion of the actual suction passage 111 and the single acting cylinder 120 and cuts through the lower portion of the actual suction passage 111, And the yarn remaining after cutting by the heating of the yarn cut-off portion 280 is allowed to stay on the yarn suction path 111.

5A to 5I, the yarn 230 after the start and end of the sewing of the raw fabric 260 is drawn out and thermally cut, and the remaining yarn 231 is cut by the control section (not shown) To be sucked and fixed.

The operation of the actual suction and hold device 100 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

6A to 6D are views showing a sectional view of a yarn suction and fixture device according to an embodiment of the present invention when yarn is cut in a suction state after the tail yarn is started to be sewn, .

6A, when the supply of suction compressed air is stopped in the suction compressed air supply unit 130, and the single-acting cylinder 120 is rotated in the direction of the arrow in FIG. 6A, The spring 123 is reduced to one end of the body 121 and is restored so that the piston 122 descends to one end and remains on the yarn suction passage 111. [ The thread 231 remaining in the needle 220 is held and fixed.

Next, as shown in FIG. 6B, the fabric 260 is sewed to the yarn 230 which is supplied after the yarn 231 remaining in the needle 220 is fixed (no yarn remaining yarn) .

Since the end of the remaining thread 231 is held and fixed, the tail 260 is sewn only by the thread 230 to be fed, so that the thread is not left on the bottom face, so that it is possible to prevent the thread.

Next, as shown in Fig. 6C, the thread that has been sewn is taken out and cut

In this case, suction compressed air is supplied from the suction compressed air supply unit 130 so that the single-acting cylinder 120 maintains the opened state of the actual suction inlet passage 111. When the spring 123 contacts the body 121 The piston 122 is lifted up to the other end so that the chamber 231 and the drawn chamber 230 remaining in the needle 220 staying on the actual suction inlet passage 111 are connected to the actual suction inlet passage 111, .

Then, as shown in Fig. 6D, the yarn of the fabric 260 is cut by applying heat.

Then, the cut yarn is sucked and removed through the yarn suction and discharge passageway 111, so that the yarn remaining after the cutting is stuck on the yarn suction and discharge passageway 111, and the smoke and odor generated when cutting the yarn, It can be removed and keep working environment good.

When the suction compressed air supply unit 130 stops supplying the compressed air, the single acting cylinder 120 maintains the closed state of the actual suction and discharge passage 111, 220 to hold the remaining thread 231 and fix it.

7 is a view showing the sewing state of the underside of the fabric according to the embodiment of the present invention, with or without a suction suction device.

In the embodiment of the present invention, as shown in Fig. 7, the end of the thread remaining in the needle after the thermal cutting is suctioned and fixed by the thread remaining on the needle, The yarn will be sewn to the yarn supplied after that, so that no yarn is left on the underside of the fabric, so that the yarn is not bundled.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and such modifications are also included in the scope of the invention.

100: A suction suction device according to an embodiment of the present invention
110:
111: Actual suction passage
120: single acting cylinder
121: Body
122: piston
123: spring
130: Suctioned compressed air supply
200: sewing machine
210: needle bar
220: Needle
230: upper thread
231: Remaining room
240: Needle plate
250: Presser foot
260: Fabric
270:
280:

Claims (2)

A sewing machine for sucking a yarn drawn by crossing a vertical movement path of a sewing needle after sewing,
A main body 110 in which a yarn suction passage 111 is vertically formed;
A suction inlet passage opening / closing unit installed in the main body 110 for opening and closing the actual suction inlet passage 111; And
And a suction compressed air supply part (130) for supplying suction compressed air to the upper part of the actual suction and discharge passage (111) and the actual suction and discharge passage opening and closing part,
When the suction-compressed air is supplied from the suction-compressed air supply unit 130, the actual suction-path opening / closing unit is operated to maintain the opened state of the actual suction-suction passage 111. At this time, So that the yarn remaining after cutting is allowed to stay on the yarn suction path 111,
When the suction-compressed air supply unit 130 stops supplying the suction-compressed air, the actual suction-passage opening / closing unit operates to maintain the closed state of the actual suction-inlet passage 111, and the remaining remaining on the actual suction- So that the next sewing can be performed while the yarn is held and fixed. The method according to claim 1,
The actual suction and discharge passage switching unit is operated to maintain the opened state of the actual suction and discharge passage 111 only when the suction compressed air is supplied from the suction compressed air supply unit 130. When the supply of the suction compressed air is stopped, (120) that is operated to maintain the closed state of the actual suction inlet passage (111) while returning to the main suction port (111).

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