• 한국정밀공학회지
• /
• 제16권3호통권96호
• /
• pp.189-197
• /
• 1999

기구의 운동에 있어서 공차는 필연적으로 운동 오차를 발생시키게 된다. 이상적인 기구의 운동을 위하여 공차를 작게 설정하는 것은 가공 또는 조립 비용을 증가시키는 반면에 제작 비용의 절감을 위하여 공차를 크게 설정하는 것은 기구의 운동 오차를 크게 증가시키게 된다. 따라서 기구의 운동오차를 고려한 효율적인 공차의 설정 및 배분이 중요하다. 이 논문은 민감도 해석을 이용하여 기구의 운동에 영향을 미치는 설계변수들에 어떻게 공차를 효율적으로 지정하고 분배하는 가를 연구하였다. 민감도 해석에서는 각 설계변수의 민감도 계수를 유도하였으며 설계변수에 공차를 지정하였을 때 발생할 수 있는 기구 운동의 최대 응답오차를 수식화 하였으며 역으로 기구 운동에 있어서 허용 응답오차를 설정하였을 때 각 설계 변수의 공차를 분배하는 과정을 유도하였다. 실제로 공차 분배 과정을 공업용 본봉 재봉기의 이송조절기구에 적용하여 허용 응답오차를 고려한 공차 설정을 합리적으로 수행할 수 있었다. 본 논문에서 제시한 공차 분배 과정은 재봉기 또는 로봇과 같이 기구운동과 밀접한 관련이 있는 기계의 설계에 유용할 것이다.

• 한국의류산업학회지
• /
• 제4권3호
• /
• pp.229-234
• /
• 2002

An investigation was made of the angle of bias on the lower part of the armhole line of the back bodice and that on the lower part of the sleeve cap curve line by cap heights, and then it was made of the lock stitch seam strength and elongation on the matching angles, the stitch density (26 stitches/3cm, 19 stitches/3cm, 14 stitches/3cm, and the samples (a cotton fabric and two kinds of cotton mixed polyester fabric). The matching angles of the machine-sewed samples are $30^{\circ}/-30^{\circ}$, $30^{\circ}/-45^{\circ}$, $45^{\circ}/-45^{\circ}$ and $60^{\circ}/-60^{\circ}$ by the analysis of the angles of bias on the lower part of the armhole seam. In view of the results of the seam strength and elongation, the reasonable sewing condition of the lower part of the armhole seam was 19 stitches/3cm.

• 대한가정학회지
• /
• 제30권1호
• /
• pp.67-86
• /
• 1992

The author distributed the questionaires which ask the idea of the purchase of children's clothes in order to help the emotinal development of children and to raise demostic economy. 89% of those who answered realized the necessity of home sewing. Because of the lack of sewing ability(66%), the author made comparatively easy patterns such as blouses for summer, skirts, short pants and one-piece dresses. To populrize these patterns, the aother used the measurements of body-measurement which were made by Korea Institute of Standard. The author studied the patterns and choice of patterns according to growing body. The author tested the clothes worn and visual evaluation for fitness of the patterns. The results are as follows: First; The author developed basic pattern 1 and 2 and applied to design A, B and C. Second: For every design, the author made patterns fit to the children. Third: According to age, the author curtailed or enlarged patterns. Lastly: The author tried to reduce living expenses through making children's clothes using the sewing machine and supress over-consumption and lead the people toward normal economic life.

• 한국의류학회지
• /
• 제20권6호
• /
• pp.1107-1115
• /
• 1996

An investigation made of the easing contraction ratio according to sewing condition (seam line; wp, wf, 45$^{\circ}$ bias, stitch density; 13 stitch/cm (0.8 mm), 9 stitch/cm (1.1 mm), 6.5 stitch/ cm (1.5 mm), 5 stitch/cm (2 mm), 4 stitch/cm (2.5 mm), thread; sp 60$^{\circ}$s/2, sp 60$^{\circ}$s/3, st 60$^{\circ}$s/3, st 50$^{\circ}$s/3)) by lockstitch industrial sewing machine with shirring foot. The correlations of the easing and sewing conditions were by SPSS PC), and visual test was done by enlarged photo. The results obstained were as follows:. 1. The easing contraction ratio is increased in proportion to the low of stitch density. 2. The easing contraction ratio of wp, 45$^{\circ}$ bias is correlated with stitch density, and that of wf be with stitch density, elongation & weight. 3. The easing contraction ratio of 13 stitch/cm (0.8 mm), 9 stitch/cm (1.1 mm), 6.5 stitch/ cm (1.5 mm), 5 stitch/cm (2.0 mm) is correlated with flexible rigidity, and that of 4 stitch/ cm (2.5 mm) be with flexible rigidity and crease-resistance. 4. As a results of SPSS PC+ statistics, the easing contraction ratio is statistically correlated to the seam line, stitch density, upper thread tension, and fabric characteristics. 5. As a results of visual test by the enlarged photo, the limit of stitch density for easing contraction was 5 stitch/cm (2.0 mm).

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2010년도 하계학술대회 논문집
• /
• pp.115-116
• /
• 2010

본 논문에서는 PMSM(Permanent Magnet Synchronous Motor)을 이용한 재봉틀 구동시스템을 개발하였다. 전차원 관측기를 이용하여 속도를 추정하고, 벨트(Belt)에 의한 외란 토크를 추정하여 보상하였다. 개발된 재봉틀 구동시스템을 실제 재봉틀에 장착하여 그 효용성을 검증하였다.

• 한국의류학회지
• /
• 제21권6호
• /
• pp.1010-1020
• /
• 1997

For this study, we did needlework of the sample considering practical aspects of production and consumption of silk, high-quality material for women's clothes, and then analyzed the state of the seam puckering after press and dry cleaning, estimated the Seam Puckering based on the mechanical properties of silk related to machine sewing, and examined the effects which Mechanical Properties have on Seam Puckering closely. Through this, we reach the following conclusion. 1. There are three types of seam puckering for each stage, which are caused bathe smoothness of the surface by press, and the difference between the shrinkage rates of fabric and sewing thread by Dry Cleaning. 2. In analyzing seam puckering classified by each step, seam puckering after sewing the fabric is related to WT negatively, while to RT and W positively. Seam puckering after sewing and pressing the fabric is related to WT, RC, MMD negatively and seam puckering after sewing, pressing anddry cleaning the fabric isrelated to WT negatively, too. 3. Concerning the mechanical properties of the sample with a little seam puckering, WT, LC, WC, RC, MMD, SMD is relatively large while RT, B, 2HB is small. 4. Judging from the result of estimating seam puckering based on mechanical properties, the estimate-formula is satisfied in this study.

• 환경위생공학
• /
• 제21권4호
• /
• pp.19-28
• /
• 2006

The purpose of this study was to investigate the related factor for the prevalence of musculoskeletal symptoms among 212 sewing worker. The survey was performed with self-administered questionnaire for the risk factors related to musculoskeletal disorders(MSDs) from August 5 to 7 in 2005. The prevalence of musculoskeletal symptoms were 75.8% and the those of the local symptoms were 71.7 % for shoulder, 60.4 % for neck, 35.8 % for arm and 50.9 % for wrist. The risk factors related the self-reported MSDs had not shown in general characteristics. But, there was a significant difference between daily working hour and wrist, working speed and neck, the degree of satisfaction and wrist for work related factor. Also, it was shown the significant difference between chair height and neck, the height of sewing machine and wrist among the space below work station, neck, waist for the prevalence of musculoskeletal symptoms. The significant correlation was shown for daily working hour and wrist, working speed and arm, work load and shoulder and the degree of satisfaction and arm for work related subjective symptom. Considering above results, it is suggested the ergonomic design be provided to working hour, the height of chair and work station as well as daily working hour even there is a significant difference for the prevalence of symptoms in each body part for sewing workers.

• 패션비즈니스
• /
• 제1권2호
• /
• pp.46-54
• /
• 1997

The purpose of this study is to understand women's wear manufacturing industries. First, the study was to investigate the present production systems and how much the automatic facility are by comparing them. This study enhanced more efficient, stable, and suitable work line. This intern will direct the way in which automatic facilities will be created. Second, through this study on the general character of the inspectors, the ratio of impaired goods, and the reasons for unsatisfactory goods, I intended to find out a way to decrease the impaired goods and to produce competitive and high quality goods. The results of the survey can be summarized as follows; 1. The result of the research on the automatic industrial facilities shows that the majority of the factories (77.4%) are 40% below the automatic facility rate. The reasons for this according to order are that was a deficit in money, no reason for expensive machines, and lack of the technique and the number of workers required to handle the machines. 2. At this time, the most required equipments are shown according to its importance; automatic sewing machine, automatic cutting machine, automatic spreading machine, and finishing & pressing machine. So in the women's wear manufacturing industries, they think that they need more automatic cutting machine, automatic spreading machine in the cutting field rather than high price automatic machine in the sewing field such as pattern former, pocket welting, automatic sleeve connecting machine and automatic label connecting machine. 3. The result of the research in the goods quality shows that the average impaired rate is 12.7% at the first inspection. In addition the average rate for complete impaired rate is 1.52%. The line system shows that it has a impaired rate that is double the rate of the pair system. Because of this, the industries plan to combine the line system and pair system to create an improved and suitable production system which can boost the quality and productivity of the goods. 4. The fabric is the main point of the impaired goods. The factors of the impaired goods in manufacturing are the lack of mental abilities of the worker, impaired fabrics and a lack of cooperation in the working system. Furthermore, there is a lack of technique for new material. 5. To prohibit impaired goods in manufacturing, there need to be a way to educate the workers and to enhance the workers' mind on the productive goods. Also there need to increase in the investments of automatic production machines. Finally there need to be a standardized working line. Therefore, there need to be an improvement on the management of the production of goods, the development of technique and an increase in the education for the workers, with this there will be a decrease in impaired goods, and an increase in better quality of goods to enforce the domestic apparel industries.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2002년도 봄 학술발표회 논문집
• /
• pp.239-242
• /
• 2002

코드사 재봉기는 커튼, 침장류와 같은 제품에 입체구조의 무의를 발현시키기 위하여 30,000 ~50,000d 굵기의 실을 사용하여 직물표면에 입체 무의를 만드는 특수 재봉기이다. 이 재봉기는 작업자가 방향 전환 핸들을 이용하여 무의를 직접 만들어야 하는 수동방식이기 때문에 숙련공의 의존도가 높다. 그래서 숙련공의 의존도를 낮추고 제품의 질, 균일성, 생산성을 향상시키기 위하여 자동화가 절실히 요구되어 왔다[1]. (중략)

• 대한가정학회지
• /
• 제44권2호
• /
• pp.49-59
• /
• 2006

Mourning culture has tended to be reduced to mere empty formalities with more simplified regulations. Changes in modern life style make it difficult to perform extended mourning ceremonies and the venues for mourning ceremony have shifted from private homes to chapels of rest in hospitals or Funeral Homes. Mourning clothing, the symbol of filial duty, has gradually been changed in shape. The study purposes were to research in the shapes of modern mourning clothing through field study on mourning clothing manufacturers and to compare traditional mourning clothing with the modern varieties through the actual making of traditional male mourning clothing based on old regulations. The study of mourning clothing through actual making prevents transformation and provides practical research data. The study methods were inquiry into old documents, field study, and actual clothing making. The study results are as follows. First, in terms of shape, traditional and modern mourning clothing are different in Garyeong, Lim and Daehacheok of Choiui. In case of Choisang, traditional clothing has one central plait in its front and rear sides while modern clothing one has 3 single plaits in each side. Second, in terms of sewing, traditional mourning clothing leaves an exterior margin to sew up in Choiui and an internal one in Choisang. However, modern mourning clothing has various types of sewing and plaits depending on the manufacturers and all sewing is done by machine. Third, in terms of material, traditional mourning clothing is made of Korean hemp and features narrow width, while modern clothing is made of Chinese hemp and features broad width.