KR101628827B1 - Tufting apparatus with improved yarn supply - Google Patents

Abstract

The present invention relates to a tufting apparatus, and more particularly, to a tufting apparatus comprising a yarn supply unit configured to include a plurality of fixed series of yarn supply rollers and a drive motor for rotating the yarn supply rollers, A yarn accumulating portion comprising a fixed upper roller and a sub yarn accumulating portion which is movable in the up and down direction and separated from the upper roller by a lower roller and accumulates the extra yarn required for changing the tufting process speed; And a tufting unit configured to include a needle and a looper and to tuft the transferred yarn to a base fabric, wherein the tufting unit is arranged in order with respect to the moving direction of the yarn, Wherein the roller is located below the upper roller fixed at the time of the maximum movement in the upward direction and the maximum amount of the yarn accumulation at the time of the maximum movement in the downward direction.

Since the tufting apparatus according to the present invention includes the yarn accumulating portion capable of accumulating a predetermined yarn between the yarn supplying portion and the tufting portion, it is possible to prevent the tufting device from being excessively loaded even if the tufting speed is increased, So that it can be smoothly supplied to the tufting portion. Therefore, when tufting bubbles by using the tufting apparatus according to the present invention, it is possible to minimize the deviation of the yarn from the yarn or the deviation of the yarn transfer path as the tufting speed increases, Height, and file density can be easily adjusted. As a result, artificial turf having various patterns, automobile mats, and cover articles for automobile chairs can be manufactured.

Tufting, yarn supply, yarn accumulation, tufting, yarn supply, yarn accumulator

Description

[0001] Tufting apparatus with improved yarn supply [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tufting device, and more particularly, to a tufting device capable of flexibly coping with an excessive load applied to a tufting device in response to a change in tufting speed, .

Tufting is a technique of tucking and pulling on a finished fabric using alcohol to create a convex effect. Generally, artificial turf for the athletic field, floor mats for automobiles, and automobile chair covers provide proper cushioning. Or it is subjected to a tufting treatment in order to grasp a foreign object such as dust or to give a feeling of beauty.

1, which schematically illustrates a conventional tufting apparatus 100, a tufting process will be described. First, a creel 10 having various yarn packs 11 and a frame 12 to which the tufting apparatuses 100 are inserted, A guide (guide) 30 for taking out a necessary yarn from the buttock and guiding it to the yarn supply unit, a tension sensor for detecting the tension applied to the yarn when the yarn is transported, A yarn feeder 50 composed of a plurality of yarn feed rollers 51 and connected to a driving motor for realizing the conveyance of the yarn and imparting tension to the yarn to be conveyed, And a tufting unit 80 for tufting the yarn transferred from the yarn supplying unit onto the fabric. The yarn detecting unit 60 detects whether the yarn is cut before being fed to the tufting unit 80. At this time, the yarn is supplied to the tufting portion, the bubble is supplied to the tufting portion by the spike roller 91 from the bubble delivering device 90, and the bubble after the tufting treatment is discharged by the other spike roller 92 through the tufting portion do. Looking more closely at the tufting of the yarn into the bubble in the tufting section, a needle mounted on the needle bar pierces the bubble to insert the yarn into the bubble, and the needle returns to its initial position Before insertion, the inserted yarn is fixed to the lower surface of the bubble by a looper, and a knot or a ring, a so-called pile, is formed.

In order to increase the interval between files formed on the storage medium, the height of the file, and the file density during the tufting process using the conventional tufting apparatus shown in FIG. 1, the tufting speed (the lateral movement distance of the needles per hour, An increase in the number of tufts per hour per hour, a movement in the longitudinal direction of needles per hour, etc.) is essential. As shown in Figure 1, the tufting device consists of a series of continuous processes of various components, The yarn supply speed of the yarn supplying portion must be changed corresponding to the change of the drive condition of the needle. However, it is not easy to simultaneously change the yarn supplying speed of the yarn feeding section in response to the change of the driving conditions of the needles. If the yarn feeding speed of the yarn supplying section does not follow the change of the driving conditions of the needles, There arises a problem that the yarn is cut off and the yarn feed speed of the yarn feeder is excessively changed with respect to the driving condition change of the needle. In addition, when the driving conditions of the needles are extremely changed, all components of the tufting apparatus are excessively loaded, and if any one of the components can not withstand this, the tufting process becomes difficult.

Therefore, when a conventional tufting device is used, there is a problem that only a single interval, a single height, and a single density file formation are smooth and the product pattern or design can not be diversified.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems of the prior art, and it is an object of the present invention to provide a yarn feeding device capable of preventing an excessive load from being applied to a tufting device in response to a change in tufting speed, The present invention provides a tufting device capable of easily adjusting the distance between files, the height of a file, and the file density, and consequently, an artificial turf having various designs or designs, an automobile mat, a cover for a car chair, .

In order to accomplish the object of the present invention, the present invention provides a yarn feeding apparatus comprising a plurality of fixed series of yarn supply rollers and a drive motor for rotating the yarn supply rollers, A yarn accumulating portion comprising a fixed upper roller and a sub yarn accumulating portion which is movable in the up and down direction and separated from the upper roller by a lower roller and accumulates the extra yarn required for changing the tufting process speed; And a tufting unit configured to include a needle and a looper and to tuft the transferred yarn to a base fabric, wherein the tufting unit is arranged in order with respect to the moving direction of the yarn, Wherein the roller is located below the upper roller fixed at the time of the maximum movement in the upward direction and the maximum amount of the yarn accumulation at the time of the maximum movement in the downward direction.

The tufting apparatus according to the present invention is preferably configured such that the yarn accumulating section includes at least three or more sub yarn accumulating sections so as to cope more stably with changes in the tufting process speed, And the lower roller are alternately arranged.

Further, the tufting apparatus according to the present invention is preferably characterized in that the loop of the tufting unit is a loop looper in order to realize more various patterns by tufting, and a loop file is formed by tufting, Wherein the cutter further comprises an additional knife, the looper is a cut looper, and a cut file is formed by tufting.

In addition, the tufting apparatus according to the present invention preferably includes a yarn supplying unit and a yarn accumulating unit for rapidly detecting the yarn supplied to the yarn accumulating unit and the tufting unit, stopping the tufting process, And a cut-out detection unit disposed between the cut-out portions.

Since the tufting apparatus according to the present invention includes the yarn accumulating portion capable of accumulating a predetermined yarn between the yarn supplying portion and the tufting portion, it is possible to prevent the tufting device from being excessively loaded even if the tufting speed is increased, So that it can be smoothly supplied to the tufting portion. Therefore, when tufting bubbles by using the tufting apparatus according to the present invention, it is possible to minimize the deviation of the yarn from the yarn or the deviation of the yarn transfer path as the tufting speed increases, Height, and file density can be easily adjusted. As a result, artificial turf having various patterns, automobile mats, and cover articles for automobile chairs can be manufactured.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tufting apparatus, and more particularly, to a tufting apparatus capable of adjusting a yarn feeding speed while preventing an excessive load from being applied to a tufting apparatus in response to a change in tufting speed. BRIEF DESCRIPTION OF THE DRAWINGS FIG.

2 schematically shows a tufting apparatus according to an embodiment of the present invention. 2, the tufting apparatus 100 'according to the present invention includes a plurality of fixed series of yarn supplying rollers and a driving motor (not shown) for rotating the yarn supplying rollers A yarn feeding part 50 'for allowing the yarn to be conveyed; A yarn accumulating portion 70 'which is composed of a fixed upper roller and a sub yarn accumulating portion which is movable in the up and down direction and separated from the upper roller and accumulates the extra yarn necessary for changing the tufting process speed, ; And a tufting unit 80 ', which comprises a needle and a looper, and which tufts the transferred yarn to a base fabric, are sequentially arranged with respect to the moving direction of the yarn.

Referring to the tufting process using the tufting apparatus according to the embodiment of the present invention shown in FIG. 2, when the driving motor of the yarn feeding unit is driven, various yarn packs 11 'and a frame 12' The yarn is drawn from the creel (10 '). The yarn used in this case is not limited to its material or shape, but the tufting treatment may be applied to artificial turf for a playground, a mat for a floor inside a car, or a cover for a car chair to provide proper cushioning, It is preferable that the above function can be appropriately performed in consideration of the fact that it is used to impart aesthetics. The yarn is preferably selected from the group consisting of nylon, polyvinyl chloride (PVC), polyolefin, And a thermoplastic resin such as an acryl-based resin.

A plurality of yarns drawn out from the creel are gathered in a collect board 20 ', and then a yarn necessary for tufting (a specific material according to the purpose of tufting, a specific color, A yarn of a specific thickness) is drawn out and guided to the yarn feeding portion 50 '. A tension applied to the yarn by the tension detector 40 'may be selectively sensed in the middle of guiding the yarn from the buttress plate to the yarn supplying unit.

The yarn feeder 50 'is composed of a plurality of serial yarn feed rollers 51' and is connected to a drive motor (not shown) that realizes the transfer of the yarn and imparts tension to the yarn being conveyed. A yarn that has been subjected to a predetermined tension and has passed through a plurality of yarn feed rollers is conveyed to a yarn accumulating portion 70 '. In the middle of being conveyed from the yarn supplying portion to the yarn accumulating portion, a yarn detecting portion 60' Whether or not the cutting is possible can be detected.

The yarn accumulating portion 70 'includes a sub-yarn accumulating portion 73 composed of a fixed upper roller 71 and a lower roller 72 movable up and down and spaced apart from the upper roller. It is responsible for accumulating extra yarn needed for speed change. The order of the upper roller and the lower roller relative to the direction of movement of the yarn in the sub yarn accumulation section can be changed as required. The upper roller of the sub yarn accumulating portion is configured such that the rotation axis of the roller is fixed to the support (not shown in the figure) so that the rotation axis itself can rotate but the roller itself can not be moved and gives a stable tension to the yarn do. The lower roller, on the other hand, is arranged so that the rotating shaft itself is moved along the groove of the support, connected to the guide of the movable rail attached to the support, or spaced apart from the support at regular intervals (not shown) And is capable of moving up and down in response to a change in the tufting process condition, and mitigates a change in the tension imparted to the yarn. The lower roller of the sub yarn accumulating portion is positioned below the fixed upper roller even though it is moved upwards in the upward direction so that the accumulation amount of the yarn becomes maximum at the maximum movement in the downward direction without interfering with the feeding of the yarn, And other components while minimizing the load. Here, the yarn accumulation amount is a value obtained by subtracting the total length of the yarn in the yarn accumulation portion when the lower roller is moved to the maximum in the upward direction, from the yarn overall length in the yarn accumulation portion when the lower roller is moved maximum downward. In addition, the tufting process conditions can be expressed by the lateral movement distance of the needle per hour, the tufting number of the needle per hour, the longitudinal movement distance of the needle per hour, etc. Generally, the lateral movement distance of the needle per hour is, The number of tufts of needles per hour serves as a factor for determining the file density formed on the supporting surface and the length of the needles per hour for determining the height of the file formed on the supporting surface. In order to increase the distance between the files formed on the image file, the height of the file and the file density, the lateral movement distance of the needle per hour, the number of tufts per hour per needle, and the longitudinal travel distance of the needle per hour must be increased, Lt; / RTI >

The yarn accumulating portion 70 'is composed of one or more sub yarn accumulating portions 73, and preferably includes at least three or more sub yarn accumulating portions for more stably coping with a change in the tufting process speed. When the yarn accumulating portion is composed of a plurality of sub yarn accumulating portions, the sub yarn accumulating portions are arranged so that the upper roller and the lower roller are alternately arranged with respect to the entire yarn accumulating portion. When the tufting speed is increased, the yarn accumulating portion is operated. When the tufting speed is increased, the lower roller initially moved downward in the downward direction is moved upward by a predetermined distance. At this time, the yarn accumulating amount The yarn feeding speed to the tufting unit per unit time is increased by the decreased amount. In this case, since the yarn supplying roller rotational speed of the yarn supplying section is not increased at the same time as the tufting speed is increased, the yarn supplying roller rotational speed can be adjusted with an increase in tufting speed and a certain time difference, In many cases, the rotation speed of the yarn feeding roller of the yarn supply unit may be maintained at an original speed.

The yarn exiting the yarn accumulation portion is conveyed to the tufting portion 80 ', which includes a needle and a looper (see FIGS. 3 and 4 below) And serves to tuft the yarn on the base fabric. The tufting part is preferably characterized in that the looper is a loop looper in order to realize more various patterns by tufting, or it is characterized in that it further includes a knife and the looper is a cut looper. In the former case, a loop file is formed on the support surface by tufting, and in the latter case, a cut file is formed on the support surface by tufting. FIG. 3 illustrates a tufting unit for forming a loop file in a tufting apparatus according to an embodiment of the present invention, and FIG. 4 illustrates a tufting unit for forming a cut file in a tufting apparatus according to an embodiment of the present invention. Respectively.

3, the needle 81 is lowered through the bubble 82 and the loop looper 83 advances forward, so that the respective yarns supplied by the needles pass through the loop- Loopers are looped. Then, the needle is lifted out of the bubble, and the looped looper is retracted and is pulled out of the looped yarn. Thus, the remaining looped yarn is made into one loop file 84. [

4, when the needle 81 'descends through the bubble 82' and the cut looper 83 'advances forward, the respective cuts of the respective cut- The yarn is looped to the cut looper. Then, the needle is lifted out of the bubble, and the bubble is moved along with the looped yarn while the cut looper is moved backward so that the looped yarn is pushed backward from the position where the looped yarn is looped on the first cut looper. As the bubble is moved between the needles and the cut looper by the above-described operation, a plurality of looped yarns are hooked to the cut looper, and the first looped yarn is sequentially fed from the portion corresponding to the knife 85 'of the cut looper Loop. Further, the knife is normally lowered when the cut looper advances, and rises when it is reversed. Therefore, when the yarn looped first in the cut looper reaches the vicinity of the knife, the cut file 84 'is cut out in the order of arrival first. In this case, the order of arriving first is the order in which the looped loops are first looped.

On the other hand, when the yarn is supplied to the tufting portion, the bubble is supplied from the bubble delivering device 90 'to the tufting portion by the spike roller 91', and the tufted bubble is touched by another spike roller 92 ' I will leave the department. At this time, the bubble may be formed into any one of a woven fabric, a nonwoven fabric, and a knitted fabric according to the type of the final product.

Figure 1 schematically illustrates a conventional tufting device, and Figure 2 schematically illustrates a tufting device according to one embodiment of the present invention.

FIG. 3 illustrates a tufting unit for forming a loop file in a tufting apparatus according to an exemplary embodiment of the present invention, and FIG. 4 illustrates a tufting unit for forming a cut file in a tufting apparatus according to an exemplary embodiment of the present invention. Respectively.

DESCRIPTION OF THE RELATED ART [0002]

10, 10 ': Crease 20, 20': Deck plate 30, 30 ': Guide

40, 40 ': tension detector 50, 50': yarn feeder 60, 60 ': cut-

70 ': yarn accumulating portion 80, 80': tufting portion 90, 90 ': bubble deliverer

Claims (7)

A yarn feeder 50 'configured to include a plurality of fixed series of yarn feed rollers and a drive motor for rotating the yarn feed rollers and to enable the yarn to be conveyed; A yarn accumulating portion 70 'which is composed of a fixed upper roller and a sub yarn accumulating portion which is movable in the up and down direction and separated from the upper roller and accumulates the extra yarn necessary for changing the tufting process speed, ; And A tufting device comprising a needle and a looper and a tufting part (80 ') for tufting the transferred yarn to a base fabric, the tufting device being arranged in order with respect to the moving direction of the yarn, Wherein the lower roller of the sub yarn accumulation portion is positioned below the upper roller fixed when the yarn is up-shifted in the upward direction and the yarn stock amount is maximum when the yarn is accumulated in the downward direction. The tufting device according to claim 1, wherein the yarn accumulating portion includes at least three sub yarn accumulating portions, and the upper and lower rollers are alternately arranged with respect to the entire yarn accumulating portion. 2. The tufting device according to claim 1, wherein the loop of the tufting portion is a looped looper, and a loop file is formed by tufting. 2. The tufting device according to claim 1, wherein the tufting portion further comprises a knife, the loop is a cut looper, and the tufting forms a cut loop file. 5. The absorbent article according to any one of claims 1 to 4, wherein the bubble is formed in any one of a woven fabric, a nonwoven fabric, and a knitted fabric. Device. The method according to any one of claims 1 to 4, wherein the yarn is at least one of Nylon, PVC, Wherein the fibers are made of one or more selected from the group consisting of thermoplastic resins. The tufting device according to any one of claims 1 to 4, further comprising a cut-out sensing part between the yarn supplying part and the yarn accumulating part.

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