Patent Application
20210054561
This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0101404, filed on Aug. 19, 2019, the disclosure of which is incorporated herein by reference in its entirety.
The present invention relates to an airbag capable of easily smoothing out a shirt which is wrinkled due to washing or long-term storage by using an inflation pressure of a wind, and more particularly, to an airbag for drying and an anti-wrinkle treatment of a garment through fine air holes, in which the airbag is inflated by injecting hot air into the airbag, a wet shirt is exposed to the hot air through the fine air holes so as to be smoothed out while being dried, and the fine air holes are not widened by repeated use of the hot air even in a case of using a vinyl sheet, so that the airbag may be used for a long time.
Currently, shirts, pants, and the like (hereinafter referred to as “garment”) are ironed to smooth out portions wrinkled after washing. Such ironing may not be easily performed on a sewed portion or depending on a material of the garment, so the ironing is quite difficult to be performed when a person is not considerably skilled.
Thus, in most cases where the person is not skilled in ironing, the person takes the garment to a laundry. In this case, there are financial burdens and inconveniences in taking and picking up the garment to and from the laundry or receiving the garment through delivery, and a considerable burden may be caused especially in a case of a garment which is frequently washed and changed in the summer.
Therefore, recently, in order to smooth out a wrinkled portion of such a garment after washing or wearing the garment, an airbag formed of a vinyl sheet inflated by air (mainly using hot air) injected through an air injection device is manufactured in a garment shape, and the airbag is inflated after putting the garment over the airbag so as to smooth out the wrinkled garment.
However, in the above scheme, the injected air is mainly hot air, and in a case where the airbag has a shirt shape, the airbag has a head part, arm parts provided on left and right sides of the head part, a torso part provided on a lower side of the head part, and a close-contact rim provided at a bottom of the torso part to inject the air and prevent leakage of the air during the injection, wherein the air is injected into the airbag after the close-contact rim is inserted into the air injection device. The airbag having such a structure is formed of a vinyl sheet in consideration of maintenance of airtightness and economic efficiency. Such a vinyl sheet has a disadvantage in that the vinyl sheet may be stretched by heat of hot air especially when an injected wind is the hot air, so that even though the vinyl sheet has the same garment shape, the vinyl sheet may be unusable due to the stretching caused by repeated use for a predetermined period of time. In particular, the vinyl sheet may not be used in a drying process immediately after the washing and spin-drying.
Therefore, in order to prevent the vinyl sheet from being stretched, multiple layers of the vinyl sheet are laminated for use. In this case, a processing cost is significantly increased, and an air injection pressure is significantly increased, so that a production cost of the air injection device has to be increased.
In addition, even if such a laminated vinyl sheet is used, in order to dry moisture after the washing, the drying may be performed with an air vent hole (it is necessary to form a fine air hole in order to allow the inflation of the airbag) being formed in the airbag. In this case, as the fine air hole is gradually widened by the hot air during use, an inflation power of the airbag may be reduced while an air injection amount of an air injector is the same, so that the wrinkled portion of the garment may not be smoothed out.
Therefore, according to the present invention, an airbag may not be stretched by hot air even without laminating layers of the airbag having fine air holes, the fine air holes may not be widened even if the fine air holes are repeatedly exposed to the hot air for drying, the airbag may be provided at a low cost, and the drying may be rapidly performed by the hot air.
To this end, a vinyl sheet constituting an airbag includes a woven cloth and a coating layer formed by coating the woven cloth with a molten resin for maintaining airtightness and drying the molten resin, and a plurality of fine air holes are punched by using heat, so that uniform fine air holes are formed, and the fine air holes or the airbag is prevented from being stretched or widened by repeated use of hot air.
In addition, when a woven cloth is coated with a molten resin for maintaining airtightness, a yarn used during weaving is surrounded by the molten resin during the coating, so that the airtightness may be maintained at a low cost.
Further, when the airbag is manufactured in a garment shape, the airtightness may be improved by simultaneously using an adhesive member and a sewing member.
Moreover, the fine air holes are concentrated at a portion where a sewing line of a garment is concentrated, so that when wrinkles are smoothed out while drying after washing, the wrinkles may be excellently smoothed out simultaneously with the drying.
Therefore, while the airbag manufactured in the form of a garment inflated by hot air is perforated to have a plurality of fine air holes, a garment put over the airbag after being washed and spin-dried may be directly dried, so that the wrinkles can be excellently smoothed out by the moisture. In this case, a tensile resistance of the woven cloth may prevent the fine air holes from being widened even after repeated use, so that the same air volume of an air injector can always dry the garment or smooth out a wrinkled portion to the same extent.
In addition, since the fine air holes are formed by heat, an edging which is thicker than a vinyl sheet fabric obtained by coating the woven cloth of the present invention with the resin is provided at an edge of the fine air hole formed at the vinyl sheet fabric, so that diameters of the fine air holes can be always uniform, and such an edging can further prevent the fine air holes from being widened even when the airbag is stretched due to the repeated use.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
As shown in
In this case, according to the present invention, the woven cloth 11 constituting the woven vinyl sheet fabric 10 may be plain-woven, twill-woven, or satin-woven by using fiber yarns crossing each other, the woven cloth 11 may not be stretched by the hot air, the fine air holes 15 may not be widened when the fine air holes 15 are formed, and the woven vinyl sheet fabric 10 may have a tensile resistance without being stretched.
In addition, a fiber yarn 13 used when weaving the woven cloth 11 is preferably a synthetic fiber yarn maintained at a constant thickness, and may have integrity such that the coating layer 12 is not detached from the fiber yarn 13 while the vinyl sheet fabric 10 has the same thickness when the coating layer 12 is formed on the fiber yarn 13 by meting a resin or the like, coating the fiber yarn 13 with the molten resin, and drying the molten resin.
Further, when the fine air holes 15 are formed by heat as will be described below, an edge of the fine air hole 15 is preferably melted to provide an edging 16 along the edge of the fine air hole 15.
However, even if a cloth woven from a cotton yarn is used, the cloth may be entirely covered with the coating layer 12 formed of the resin or the like, so that there may be no problem in the use of the cloth.
In addition, when forming the coating layer 12 of the present invention, it is most preferable to coat the woven cloth 11 by a thickness that allows the coating layer 12 to vertically surround the woven cloth 11. For example, when the fiber yarn 13 of the woven cloth 11 has a thickness of 1 mm, a thickness of the coating layer 12 is preferably at least 2 mm or 2.1 to 2.3 mm which is slightly thicker than 2 mm.
If the coating layer has a thickness which is thicker than the above thickness, there is an inconvenience of increasing an air injection pressure of the air injector.
However, when a coating layer 12a is formed only in a mesh opening 14 of the woven cloth 11, the air may permeate through the fiber yarn 13 constituting the woven cloth 11, so that the airbag may not be inflated.
According to the present invention, a coating solution used when forming the coating layer 12 may be urethane or epoxy in consideration of flexibility.
However, the coating solution is not intended to limit the purpose of the present invention, and various molten resins may be used for the coating and dried in order to maintain the airtightness of the woven cloth 11.
For example, when a cloth 11 woven from a polypropylene (PP) yarn, which is a synthetic fiber yarn configured as the fiber yarn 13, is used, a PP resin may be melted, and the cloth 11 may be coated with the PP resin in a T-DIE scheme. Since PP is rigid, polyethylene (PE) (especially LDPE or LLDPE) which is soft may be mixed with the PP, and a mixture thereof may be melted and used for the coating, so that the flexibility may be maintained at a low cost.
In addition, when a plurality of fine air holes 15 are formed in the airbag 100, an object of the present invention may be sufficiently achieved by a general punching pin. However, in order to use the airbag 100 for a longer period of time, a heated pin (with a sharp tip) may be used when punching the fine air holes 15, so that the edge of the fine air hole 15 may be curled due to characteristics of the woven vinyl sheet fabric 10 so as to provide the edging 16. Accordingly, the fine air holes 15 are reinforced so as not to be torn, so that the fine air holes 15 may not be widened even by a strong pressure of the hot air or the like.
In other words, when forming the fine air holes, a cut portion of the crossing fiber yarn of the woven cloth may be connected to the edging 16, so that the woven cloth may not be cut off.
In this case, it is most preferable to heat the heated pin to the extent that allows the woven vinyl sheet fabric 10 to be sintered before being melted, in which the woven vinyl sheet fabric 10 is maintained in a sintering state so as to be cured while being melted, so that cut portions may be connected.
According to the present invention, a most preferable heating temperature is a temperature slightly lower than a temperature before the melting. When a temperature is higher than the most preferable heating temperature, uniform fine air holes may not be formed by the melting, and when a temperature is too low in comparison with the most preferable heating temperature, the cut portions may not be connected to the edging.
When the fine air holes 15 are punched with the general punching pin, as a woven portion of the woven cloth is cut off, the fine air holes may be widened by repeated use. However, when the heated pin is used for the perforation, in a case of the fiber yarn 13 constituting the woven cloth 11 especially when the synthetic fiber yarn is used as the fiber yarn 13, the woven portion of the woven cloth 11 may be changed into a sintered state and agglomerated while being cut off by heat, so that the woven cloth 11 may be prevented from being cut off, and thus the fine air holes 15 may be prevented from being widened in a most preferable way.
In addition, when the airbag 100 is provided in the form of a garment by using the woven vinyl sheet fabric 10 described above, the airbag 100 is provided at an adjustable portion thereof with an adjustment zipper device 40 so that the airbag 100 may be adjusted, for example, in a size of large, medium, and small according to a size of a garment.
According to the present invention, a margin width part 41 may be provided on an inner side of the adjustment zipper device 40 so that extension and contraction may be performed as the margin width part 41 is folded or unfolded by a folding line 42.
Referring to the adjustment zipper device 40, a zipper having a slider may be provided in a single row on one side, and another zipper engaged with the slider may be provided in a plurality of rows, so that a width may be adjusted.
In addition, when zipper rows 43 of the adjustment zipper device are attached to the airbag 100 through sewing, a folded part 101 may be provided so as to be attached together with the zipper rows 43, so that the airtightness may be maintained by a sewing line 102 when the airbag 100 is inflated in the form of a garment by injecting the air into the inner space.
When the airbag 100 is manufactured in the form of a garment by using the woven vinyl sheet fabric 10, the folded part 101 may be provided in the same manner as described above so as to form the sewing line 102.
When the airbag 100 shown in the drawings of the present invention has a shirt shape, a fore end of a neck part 110 protruding upward and fore ends of arm parts 120 spreading to left and right may all be blocked, a torso part 130 may be provided with an opening part 131 so as to be connected to the air injector 1 while a bottom of the torso part 130 is blocked, and a close-contact rim 132 for maintaining the airtightness may be provided at an edge of the opening part 131.
In addition, an opening/closing zipper device 30 may be provided at a front portion of the torso part 130 to open and close the airbag 100 so as to mount a rack device 2 which is connected to the air injector 1 so as to stand upright. Further, an adjustment zipper device 40 for extending and contracting a size of the torso part 130 may be provided at left and right flank portions of the torso part 130, so that a width of the torso part 130 may be widened or narrowed as the margin width part 41 is exposed by the opening and closing of the adjustment zipper device 40.
In other words, the present invention may be applied to a shirt having a medium size when only an adjustment zipper device 40 on one side is opened, may be applied to a shirt having a large size when all adjustment zipper devices 40 are opened, and may be applied to a shirt having a small size when all the adjustment zipper devices 40 are closed.
In addition, the fine air holes 15 may be concentrated at a portion corresponding to a portion of the garment that is not easily dried while the garment is put over the airbag 100, and the fine air holes 15 may be more intensively added, so that a drying time may be shortened.
To this end, according to the present invention, when manufacturing the airbag 100 having the garment shape, the fine air holes 15 may be arranged in a single row or a plurality of rows on left and right sides along a sewing portion of a shirt, the fine air holes 15 may be arranged in a single row or a plurality of rows on left and right sides along a portion where the adjustment zipper device 40 for the extension and the contraction is provided, and the fine air holes 15 may be arranged in a single row or a plurality of rows on left and right sides of the folding line 42 on the margin surface part 41 exposed when the adjustment zipper device 40 is opened for the extension.
In addition, the fine air holes 15 may be arranged in a single row or a plurality of rows on left and right sides of a portion where the opening/closing zipper device 30 provided at the front portion of the torso part 130 is provided, and the fine air holes may be arranged in a single row or a plurality of rows on an upper side of the opening/closing zipper device 30, such that the fine air holes may have a ‘T’ shape.
The fine air holes 15 may be arranged in a single row or a plurality of rows at a rear portion corresponding to the front portion of the torso part in a same manner as the front portion of the torso part, so that a more excellent drying effect may be obtained.
In addition, the fine air holes 15 may be concentrated at the blocked fore ends of the arm parts and the neck part so as to form a fine air hole aggregation part 15a, and the fine air holes 15 may be arranged in a single row or a plurality of rows along left and right portions of a sewing line of the arm part, so that the wrinkles may be smoothed out simultaneously with rapid drying.
Further, when the opening part 131 of the airbag 100 is mounted around the air injector 1, in order to prevent leakage during the air injection, the close-contact rim 132 provided at the opening part 131 of the torso part 130 may have a burring part 133 which is configured to make close contact with a shaft 4 of an injection port by a predetermined width when the close-contact rim 132 is inserted into the injection port 3 of the air injector 1, so that an inflation power of the airbag 100 may be increased by maintaining the airtightness.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2019-0101404 | Aug 2019 | KR | national |
