JP2006316362A - Method for sewing dust-free garment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for sewing a dust-free garment worn in order to prevent product defects caused by interfusion of foreign matters or dust, and semipermanently preventing the cut surface of fabrics from generating yarns and fuzz even after long wearing or frequent washing. <P>SOLUTION: The method for sewing a dust-free garment comprises the following process: overlapping margin parts of fabric parts to be sewn up on each other; basting the parts; subjecting both edge sides of the overlapped fabric parts to ultrasonic cutting and ultrasonic sewing; and sewing a bias tape on the cut surface so as to cover the sewn part subjected to the ultrasonic sewing treatment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for sewing dustless clothes worn in the manufacturing process of medical devices, pharmaceuticals, foods, semiconductors, electronic devices and the like.

In the manufacturing process of medical devices, pharmaceuticals, foods, semiconductors, electronic devices, etc., in order to prevent product defects due to contamination by foreign substances and dust, workers should use dedicated cleanroom clothing (dust-free clothing) as shown in FIG. Must be worn.
Sewing of garments is by cutting fabric materials and stitching of cut fabric parts. At this time, according to ordinary cutting machines and sewing machines using steel blade cutters, threads and needles, they are being worn or washed. It is inevitable from the standpoint of the material properties that the stitched part is loosened due to twisting, expansion and contraction, friction and the like, and thread flaking is generated from the cut surface.

Therefore, in the past, there have been contrivances such as over-sewing the cut surface, wrap-stitching, or enveloping the cut surface with a bias tape. In some cases, a dust cut occurs from the cut surface and a sufficient effect cannot be obtained, and dustless clothing itself is a source of dust generation.
JP-A-5-156666 JP-A-8-232149 JP 2000-170015 A

  The present invention has been made in view of the above-described problems associated with conventional dust-free clothing, and it is an object of the present invention to provide a means for sewing dust-free clothing that is free from the occurrence of thread flaking from the cross section of the fabric.

  In order to solve the above-mentioned problem, in the invention of claim 1, the seam portions of the fabric parts to be sewn are aligned and overlapped and temporarily stitched, and both edges of the superposed fabric parts are ultrasonically cut and cut. It was characterized by ultrasonic suturing along the surface.

  The invention according to claim 2 is characterized in that a bias tape is sewn from the cut surface so as to enclose a seam allowance portion that has been ultrasonically stitched.

  According to the sewing method of the present invention, since the cross section of the fabric cutting is fused by ultrasonic cutting, it is possible to surely prevent the occurrence of thread mark, and the stitched portion is melted slightly surface by ultrasonic stitching. Since the stitches are sewn, there is no occurrence of sewing shrinkage or wrinkles, and the stitched portion is not distorted or loosened even when a slight twisting load or expansion / contraction load is applied.

  In addition, since the seam allowance and cut surface are encapsulated with a bias tape, it is possible to further prevent the occurrence of thread fluff, and in addition, the touch is good and the design at the time of finishing is improved. be able to.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially sectional perspective view showing a part of a stitched portion of a dustless garment sewn by the sewing method of the present invention. First, in order to prevent any cut displacement or sewing during ultrasonic cutting or ultrasonic stitching performed later, a seam margin portion of one or a plurality of fabric parts 1, 1 ′ that has been cut into a desired shape in advance is formed. They are aligned and overlapped, and along the edge, temporary stitching is performed by normal sewing means using a thread and a needle. Reference numeral 2 in the drawing indicates this temporary stitching portion, and FIG. 2 is a cross-sectional view of the vicinity of the edge portion of the fabric parts 1, 1 ′ in the temporarily stitched state.

  Next, both edges of the polymerized fabric parts 1 and 1 ′ are integrally ultrasonically cut and the fabric part 1 and the fabric part 1 ′ are ultrasonically stitched. At this time, the order of suturing and cutting may be any, and when an ultrasonic suturing machine (ultrasonic sewing machine) having a cutting function is used, it can be performed simultaneously. Reference numeral 3 in the figure indicates the ultrasonic stitching portion, and reference numeral 4 indicates the ultrasonic cutting section. FIGS. 3 and 4 show the ultrasonic stitched state and the ultrasonic cut state, respectively. It is sectional drawing near the edge part of the fabric parts 1, 1 '.

  The cut surface 4 of the ultrasonically cut fabric parts 1, 1 ′ is fused and integrated with each other by the heat action of the ultrasonic cutting machine, so that loosening and thread flaking are not generated. Absent. Similarly, the ultrasonic stitching portion 3 is similarly fused and stitched by the heat action of the ultrasonic sewing machine, so that it is difficult for stitch shrinkage and wrinkles to occur. The seam allowance will not be distorted or loosened.

  Subsequently, a separately prepared bias tape 5 is bent in a U-shaped cross section in the longitudinal direction, and is applied so as to wrap up the seam margin from the ultrasonic cut surface 4 of the ultrasonically stitched fabric parts 1, 1 ′. To do. Since the stitched bias tape 5 covers and hides the ultrasonic stitching section 3 and the ultrasonic cutting section 4 and protects and reinforces them, the above-mentioned effect can be further ensured. It can prevent that the ultrasonic cutting surface 4 touches a wearer's skin directly. FIG. 5 is a cross-sectional view of the vicinity of the edge portion of the fabric parts 1, 1 ′ in a state where they are ultrasonically stitched, ultrasonically cut and encapsulated with the bias tape 5.

The partial notch partial perspective view in the dust-free clothes sewn by the method of the present invention. Sectional drawing which shows the temporary stitching means in the dust-free clothes. Sectional drawing which shows the ultrasonic suturing means in the dust-free clothing. Sectional drawing which shows the ultrasonic cutting means in the dust-free clothes. Sectional drawing which shows the encapsulation means by the bias tape in the dust-free clothes. The front view of a dust-free clothing example.

Claims (2)

  Sewing of dust-free clothing characterized by superimposing stitches of fabric parts to be stitched and temporarily stitching, ultrasonically cutting both edges of the polymerized fabric parts, and ultrasonically sewing along the cut surface Method.   2. The dustless garment sewing method according to claim 1, wherein a bias tape is sewn from the cut surface so as to enclose the seam allowance portion which has been ultrasonically stitched.

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