Journal of the Textile Machinery Society of Japan最新文献

{"title":"Electromyographic Study of Lower Limb Muscles When Walking on Carpets","authors":"I. Hirai, T. Gunji, K. Maie, Tadatoshi Yamada, S. Kondo","doi":"10.4188/JTE1955.35.1_6","DOIUrl":"https://doi.org/10.4188/JTE1955.35.1_6","url":null,"abstract":"The characteristics of walking on carpets were inverstigated from the view point of lower limb muscle activities. Electromyograms of Musculus rectus femoris, M. tibialis anterior, M. gastrocnemius, and hamstring muscles of twelve female college students were recorded during the natrual walking on four kind of carpets-nylon loop pile carpet with or without jute underlay, wool cut pile carpet with or without jute underlay-and PVC tiles. The beginning point, the end point, and the duration of each muscle contraction were analysed by F-test, and it was found that the differences among the subjects were larger than those among the carpets. Similarly to our previous conclusion, it is concluded that the natural walking is not changed by the kinds of carpets from the view point of lower limb muscle activities and ground reaction forces.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72601638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors Affecting Dimensional Properties of Cotton Plain-Jersey Fabrics","authors":"Ryuzo Oinuma","doi":"10.4188/JTE1955.35.3_6","DOIUrl":"https://doi.org/10.4188/JTE1955.35.3_6","url":null,"abstract":"The effect of fabric tightness (K) and relaxation treatment on the dimensional parameters (kc; , kw;, ks; =kc; ×kw; and kr; =kc; /kw; ) and the ratio t/l for plain-jersey fabrics is investigated experimentally, using plied yarn of nylon multiple filament, that of cotton yarn, and paralleled cotton yarn.For coarse nylon plain-jersey fabrics, the dimensional parameters are independent of the fabric tightness and the method of relaxation treatment used. The ratio t/l is dependent on the fabric tightness, and independent of the method of relaxation treatment used.For cotton plain-jersey fabrics knitted of plied yarns, the dimensional parameters and the ratio t/l are dependent on the fabric tightness and the method of relaxation treatment used. For these knitted of paralleled yarns, kr is dependent on the fabric tightness, and kc; , kw; , ks; and the ratio t/l are dependent on the fabric tightness and the method of relaxation treatment used.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76961954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of Weave Type in Woven Fabric by Digital Image Processing","authors":"Mizuho Kinoshita, Yositada Hashimoto, R. Akiyama, S. Uchiyama","doi":"10.4188/JTE1955.35.2_1","DOIUrl":"https://doi.org/10.4188/JTE1955.35.2_1","url":null,"abstract":"Weave types of commercial woven fabrics were determined by analysing the two-dimensional Fourier transformation patterns of the reflected images. Data collection and data analysis were done by image processing system based on a microcomputer. The relationships between the structural units of weave types and the Fourier power spectra are summarized as follows: (1) structural unit is observed in the unit cell defined by the neighboring two warp yarns and two filling yarns in Fourier space, (2) weave harrness is obtained by counting the number of power spectra inside the unit cell, (3) structural unit is equivalent to the Fourier power spectrum arrangement of the reflected image rotated by 90 degree. A woven fabric made of the cross combination of the warp and filling yarns has a two-dimensional lattice structure. To study the fabric structure, it is useful to observe the periodic arrangement of the surface contours associated with the yam faces or the geometrical intersticies enclosed by neighboring two yams. They have an effect on the optical and mechanical properties of the fabric. In practice, the quality of the woven product is related to the geometrical shape of the lattice structure and their irregularity distribution, and the visual and handling properties are also related to the surface contours of the fabric. The fabric analysis is made to determine the fabric structure. The real time data processing and the automatical method for the detection and discrimination are required in place of the manual measurement. We have mainly studied an optical image evaluation on the periodic arrangement of the fabric structure by observing the optical diffraction pattern. In the previous papers, we have described the detection of fabric defects l'21, the discrimination among fabric defects131, and the local irregularity under uniaxial extension~41 In these above analysis, the two-dimensional arrangement defined by yam intersticies have been investigated. The surface contour pattern is also one of the periodic arrangement defined by the structral unit arrangement, i.e. weave type. The weave type of a woven fabric is constructed by the repetition in space of a structural unit defined by the warp and filling faces. The theoretical studies of the construction for the complete design have been made by several investigators~s-71 Numerical method for constructing the complete weaves has","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89045690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a New Evaluation System of Frictional Static Charge","authors":"M. Matsui, H. Naito, Kazuo Okamoto, T. Kashiwamura","doi":"10.4188/JTE1955.35.2_12","DOIUrl":"https://doi.org/10.4188/JTE1955.35.2_12","url":null,"abstract":"The static charge (voltage) and it's decay curve of rubbed fabric are measured and recorded automatically by the newly developed KB system. The accuracy and reproducibility of the KB system have been compared with those of existing Rotary Static Tester and Faraday's Cage Method prescribed in the Japanese Industrial Standard (JIS). It has been proved that the KB system has higher accuracy, higher reproducibility and lower variation than those of the existing methods.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84986150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Yarn Tension in Air jet Nozzles","authors":"Nobuo Iwak, T. Kinari, Hiroyuki Yamazaki","doi":"10.4188/TRANSJTMSJ.41.10_T145","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.41.10_T145","url":null,"abstract":"In the insertion of yarns by air jet, the yarn acceleration in the jet nozzle is one of the important factors. The present investigation is planned to discuss the yarn tension mechanism in nozzles as follows. 1) Air flow rate and its velocity in nozzles are measured experimentally. 2) The drag force acting on different kinds of yarns according to yarn structure and count is measured. The yarn tension obtained is compared with the theoretical value calculated from the drag coefficient based on the Reynolds number. The results obtained were as follows. 1) An increase of the bore size of the induction nozzle provided in the jet nozzle increases the air flow rate inducted by driving flow. The maximum bore size was 3 mm. 2) The induced flow rate reached a limited value in spite of increasing the driving pressure. 3) The applied tension on the yarn in a jet reached a limited value in spite of increasing the length of the acceleration pipe. 4) The yarn tension calculated from equations based on the isentropic flow of compressible fluid and the air drag in the nozzle were in agreement with those obtained experimentally.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75251623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Pilling by Computer Image Analysis","authors":"Atsuo Konda, L. Xin, Masayuki Takadera, Y. Okoshi, K. Toriumi","doi":"10.4188/TRANSJTMSJ.41.7_T113","DOIUrl":"https://doi.org/10.4188/TRANSJTMSJ.41.7_T113","url":null,"abstract":"The distribution curve of pill sizes, the total number and the total area of pills, and the mean area of pills are obtained from the image of a pilling smaple which is read into a computer with a TV camera. Then, how to determine the pilling grades of different samples by comparing their pilling feature values with those of the standard photographs in JIS L 1076 is discussed. The results obtained are as follows:1. The region of the small size in the distribution curve of pill sizes, which is obtained from the image of sample, contain the components owing to the reflection from woven yarns and naps. It is considered that the distribution for the pill sizes larger than threshold Ta is assumed to be correct.2. This threshold Ta; for the standard photographs is determined so that the total number of pills obtained by the image analysis may coincide with that obtained by the visual inspection of photograph. The values of Ta; are different with the groups of the standard photographs, but nearly constant for different grades in every group. The Ta; for the group whose distribution curve of pill size resembles that of a given sample can be used as Ta; for the given sample.3. The pilling grades of a given sample can be determined by comparing its total number or total area of pills with that for the standard photographs of different grades in the group a distribution curve of which resembles that of the sample. However, the judgment of pilling grade by the two dimensional expression of pilling feature value is better than that by the single feature value, that is, the total number or area of pills.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89175220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spirality in Plain-Jersey Fabrics Knitted of Three-Ply Cotton Yarns","authors":"Ryuzo Oinuma, Hiraku Takeda","doi":"10.4188/JTE1955.34.74","DOIUrl":"https://doi.org/10.4188/JTE1955.34.74","url":null,"abstract":"The effects of some factors on the Spirality in plain jersey fabrics knitted of three-ply cotton yarns are investigated experimentally, and the following equation is derived statistically: PS(%)=(a√ +b)Sn+c/l+d where PS(%) is the percentage spirality in cotton plain jersey fabrics, Sn the number of snarls per yarn length of 25cm, l the loop length in mm, and a, b, c and d are constants. Let PS(%) and Sn be positive for the Z direction and negative for the S direction.The values of a and b are approximately constant and independent of the knitting machine speed and the method of the relaxation treatment used. On the other hand, the values of c and d are dependent on them. The values calculated from this equation agree well with the experimental values.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82647614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measuring of Surface Shape of Cloths by Ultrasonic Sensor","authors":"S. Nishikawa, H. Niwaya, A. Shibuya, N. Aisaka","doi":"10.4188/JTE1955.34.111","DOIUrl":"https://doi.org/10.4188/JTE1955.34.111","url":null,"abstract":"We have tried applying the distance mesuring technique by ultrasonic sensor to non-contact measurement of the surface shape of cloth with small curve such as wrinkle. An ultrasonic sensor used is a focusing type (dia.: 30 mm; focus:50 mm; beam dia.: lmm). It is observed that the sensor can detect the change at the level of 1 mm both in height and in interval of the curved surface and this measuring method has the possibility to obtain the fairly accurate result for the measurement of the shape of small curved surface. Also, we have tried measuring the 3-dimensional shape of garment made of some large curved surfaces. In the experiment, we measured the distance from reflecting surface by attaching a sensor (dia.: 10 mm; focus: 60 mm; beam dia.: 6 mm) at the end of the arm of drape measuring apparatus (trial model). In this measurement, the data of 3-dimensional shape of garments made of sofa and thin materials were easily detected, and the efficiency of a non-contact measuring method by the ultrasonic was proved.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88197345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Interlaced Yarn:Part 4: Yarn Posture in Interlacer, and Relation between Yarn Positions and Number of Tangles","authors":"Y. Iemoto, S. Chono, Takayuki Tanaka","doi":"10.4188/transjtmsj.41.T30","DOIUrl":"https://doi.org/10.4188/transjtmsj.41.T30","url":null,"abstract":"目的 インターレーサ内の糸の運動を明らかにするための基礎実験として, 加工時の糸をスチールカメラで複数回にわたって撮影し, 糸の位置をコンピュータで統計的に処理することにより, インターレーサ内の糸の姿勢について解析する.又, 糸の位置と交絡数の関係についても検討する.成果 (1) 糸の姿勢の解析には, 糸道断面を6個のエリァに分割し各エリァにおける糸の位置を糸軸方向に調べる方法を用いた.その結果, 本研究範囲内ではインターレーサ内の糸の姿勢に際立った特徴は見られない. (2) 空気圧が2～4kg/cm2の範囲では, 糸は空気噴流軸の左右に均等に位置し頻繁に噴流を横切る.しかし, 空気圧が小さいために糸を充分開繊または交絡させることができない.空気圧が5～7kg/cm2と大きい場合, 糸は噴流軸の片側に位置し噴流を横切る回数は少ない.すなわち, 空気圧の小さい範囲と大きい範囲での交絡数の少ない原因は異なる.従って, 空気圧の変化だけでなく糸の運動も考慮すれば, 空気圧が4.5kg/cm2のとき最大となる交絡数の変化を説明できる. (3) 糸速の増加と共に糸の位置に偏りが生じ, 糸が空気噴流を横切る回数は減少する.交絡数と糸速が単純に反比例関係で表されないのはこれが原因であると考えられる. (4) フィード率の増加と共に糸張力が減少し, 糸が空気噴流を横切る回数は減少するため, 交絡数も減少する.フィード率が小さい場合, 糸の運動は糸道の中心に制限されるため頻繁に噴流を横切るが, 糸張力が大きいので交絡部はあまり生じない.従って, フィード率がおよそ1%で交絡数は最大となる.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90092526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on metallic wire for high-speed and high-production cotton card. Part 1. the effect of high-speed and high-production carding on the carding performance when a heavy gain sliver is produced","authors":"Jyuzo Hosokawa, Toshiki Ogita, Kiyohide Yagya, Shigeki Kanazawa, A. Horikawa","doi":"10.4188/transjtmsj.41.9_p473","DOIUrl":"https://doi.org/10.4188/transjtmsj.41.9_p473","url":null,"abstract":"度 の比率 を一定 に保 ちなが ら全 体 を高 速化 す る こと Studis on Metallic Wire for High-Speed and High-Production Cotton Card Part 1. The Effect of High-speed and High-Production Carding on the Carding Performance, when a heavy Gain Sliver is Produced. By Jyuzo Hosokawa*, Toshiki Ogita**, Kiyohide Yagya**, Shigeki Kanazawa** and Akira Horikawa*** *Faculty of Education, Shiga University, Shiga. **R & D Dept., Kanai ,Juyo Kogyo Co., Ltd., Itami ***Department of Mechanical Engineering , Osaka University, Osaka.","PeriodicalId":17585,"journal":{"name":"Journal of the Textile Machinery Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82267726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}