日本包装学会誌 Vol.33 No.1（2024）

一般論文～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～ࢽ࣮ࣗࣛࣝࢿࢵࢺ࣮࣡ࢡࢆ⏝࠸ࡓẁ࣮࣎ࣝ⟽ࡢᅽ⦰ᙉᗘண㣤 ⏣ ᜤ ᖹ *Prediction of the Compressive Strength of Cardboard Boxes
using a Neural NetworkKyohei IIDA*
ᮏ◊✲࡛ࡣࠊࢽ࣮ࣗࣛࣝࢿࢵࢺ࣮࣡ࢡࢆ⏝࠸࡚ẁ࣮࣎ࣝ⟽ࡢᅽ⦰ᙉᗘࡢண ࣔࢹࣝࢆసᡂࡋࠊண ⢭ᗘࡢホ౯ࢆ⾜ࡗࡓࠋάᛶ໬㛵ᩘࡣ Swish 㛵ᩘࢆ⏝࠸࡚ࠊ㞃ࢀᒙࡢࣀ࣮ࢻᩘཬࡧᒙᩘࢆኚ໬ࡉࡏ࡚ண ⢭ᗘࡀ㧗ࡃ࡞ࡿ᮲௳ࢆ᳨ウࡋࡓࠋࡑࡢ⤖ᯝࠊRMSPE ࡀ 8.53%࡟࡞ࡿ᮲௳ࡀᚓࡽࢀࡓࠋࡇࡢ್ࡣࢣࣜ࢝ࢵࢺࡢ⡆᫆ᘧࡼࡾࡶ㧗࠸ண ⢭ᗘ࡛࠶ࡗࡓࠋࡲࡓࠊண ࣔࢹࣝࡀ୰௙ษࡾཬࡧ୰௙ษࡾࢆධࢀࡓẁ࣮࣎ࣝ⟽࡟ࡶά⏝࡛ࡁࡿࡇ࡜ࡀศ
࠿ࡗࡓࠋIn this study, we made a predictive model for the compressive strength of cardboard boxes using a neuralnetwork, and evaluated the prediction accuracy. The swish function was used as the activation function. We
searched for conditions with high prediction accuracy by changing the number of nodes and layers in the hiddenlayer. As a result, a condition was obtained that result in the root mean squared percentage error of 8.53%. Thisvalue indicates better prediction accuracy than the simple kellicutt formula. Furthermore, the predictive model
can predict the compressive strength of partitions and cardboard boxes containing partitions.
࣮࣮࢟࣡ࢻ
ẁ࣮࣎ࣝ⟽ࠊᅽ⦰ᙉᗘࠊᶵᲔᏛ⩦ࠊࢽ࣮ࣗࣛࣝࢿࢵࢺ࣮࣡ࢡࠊ୰௙ษࡾ
Keywords Cardboard box, Compressive strength, Machine learning, Neural network, Partition㻝 㻚 ⥴ゝ㻲㼕㼓㻚㻞 ࡛♧ࡍࢽ࣮ࣗࣛࣝࢿࢵࢺ࣮࣡ࢡࡢ୍౛࡛ேᕤ▱⬟ࡢᐃ⩏ࡣ◊✲⪅ࡈ࡜࡛␗࡞ࡿࡀࠊ࠶ࡿ 2 ) ࠋ࠾࠾ࡲ࠿࡟ࡣࠕ▱ⓗ࡞ᶵᲔࠊ≉࡟ࠊ▱ⓗ࡞ࢥࣥࣆ࣮ࣗࢱࣉࣟࢢ࣒ࣛࢆసࡿ⛉Ꮫ࡜ᢏ⾡ࠖ࡜ゝ ࢃ ࢀ ࡿ 1) ࠋ ே 㛫 ࡢ ⬻ ࡢ ാ ࡁ ࢆ ࢥ ࣥ ࣆ ࣗ ࣮ ࢱ࡛෌⌧ ࡍࡿ ࡓࡵ ࡟䚸 㻲㼕㼓㻚㻝 ࡛♧ࡍேᕤࢽ ࣮ࣗ ࣟࣥࡀ⪃࠼ฟࡉࢀࡓࠋධຊᒙࠊ㞃ࢀᒙࠊฟຊᒙࡢ 3 ᒙᵓ㐀࡛ࣀ࣮ࢻࢆࡘ࡞ࡂྜࢃࡏࡓࡶࡢࡀ
*㻲㼕㼓㻚㻝㻌㻭㼞㼠㼕㼒㼕㼏㼕㼍㼘㻌㼚㼑㼡㼞㼛㼚㻌㐃⤡⪅(Corresponding author), ࠶࠸ࡕ⏘ᴗ⛉Ꮫᢏ⾡⥲ྜࢭࣥࢱ࣮⏘ᴗᢏ⾡ࢭࣥࢱ࣮ (ࠛ448-0013 ឡ▱┴ส㇂ᕷᜠ⏣⏫ 1 ୎┠157 ␒ᆅ 1), Aichi Center for Industry and Science Technology Industrial Research Center 1-157-1 Onda-cho, Kariya-shi, Aichiken, 448-0013, Japan,
TEL:0566-45-6902, FAX:0566-22-8033, Email:kiyouhei_iida@pref.aichi.lg.jp－ 49 －日本包装学会誌 Vol.33 No.1（2024）

技術報告～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～

᣺ືヨ㦂࡟ࡼࡿ㌿ಽ᳨▱ჾࡢㄗసືⓎ⏕࡟㛵ࡍࡿ◊✲㔠 ஭ ಇ ௓ * 

Research on Malfunction Occurrence of Tipping Detectorby Vibration Test㻌
Shunsuke KANAI*ໟ⿦㈌≀ࡀ㌿ಽࠊᶓಽࡋࡉࢀࡓ㝿࡟ࡑࡢ᰿ᣐࢆ♧ࡍ࢔࢖ࢸ࣒࡜ࡋ࡚ࠊ㌿ಽ᳨▱ჾࡀ࠶ࡿࠋࢸ࢕ࣝࢺ࢛࢘ࢵࢳ࡜࠸࠺ၟရࡀ᪥ᮏ࡛ࡣከࡃᬑཬࡋ࡚࠸ࡿࠋࡇࡢࢸ࢕ࣝࢺ࢛࢘ࢵࢳࡢᵓ㐀ࢆぢࡿ࡜ࠊ෇┙ࡢୖ࡟᣺ࡾᏊࡀ࠶ࡾࠊࡇࡢ᣺ࡾᏊࡀື࠸ࡓ᫬࡟෇┙ࡀ⛣ືࡋࠊ཯ᛂࡍࡿࡋࡃࡳ࡜࡞ࡗ࡚࠸ࡿࠋࡇࡢࡇ࡜ࡼࡾࠊໟ⿦㈌≀ࡀ㌿ಽࡋ࡚࠸࡞ࡃ࡚ࡶࢸ࢕ࣝࢺ࢛࢘ࢵࢳࡀ཯ᛂࡋ࡚ࡋࡲ࠺ㄗసືࡀⓎ⏕ࡍࡿྍ⬟ᛶࡀ࠶ࡿ࡜௬ㄝࢆ❧࡚ࡓࠋࡇࡢ௬ㄝࡢ᳨ドࡢⅭ࡟ࢸ࢕ࣝࢺ࢛࢘ࢵࢳࡢ㈞ࡾ௜ࡅ᫬ࡢഴࡁࢆኚ࠼࡞ࡀࡽ᣺ືヨ㦂ࢆᐇ᪋ࡋࡓࠋ⤖ᯝࡣ௬ㄝࡀṇࡋ࠸࡜࠸࠺ࡇ࡜ࡔࡗࡓࡀࠊᐇ㝿ࡢὶ㏻᮲௳ࢆ⪃៖ࡋ࡚⪃ᐹࡍࡿ࡜ࠊഴࡁࡢ᭱኱್ࡣซࡑ r⛬ᗘ࡛࠶ࡾࠊࡑࡢ⛬ᗘ࡛ࡣࢸ࢕ࣝࢺ࢛࢘ࢵࢳࡢㄗసືࡣⓎ⏕ࡏࡎࠊࢸ࢕ࣝࢺ࢛࢘ࢵࢳࡢಙ⏝ᛶࡶ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ
A tipping detector is an item that indicates the grounds when a packaged cargo is toppled or overturned. Aproduct called Tiltwatch is very popular in Japan. Looking at the structure of this tilt watch, there is a pendulumon the disc, and when the pendulum moves, the disc moves and responds. Based on this, we hypothesized that
there is a possibility that the tiltwatch may malfunction even if the packaged cargo is not overturned. In order toverify this hypothesis, we conducted a vibration test while changing the inclination of the tilt watch when it wasattached. The result was that the hypothesis was correct, but when considering the actual distribution conditions,the maximum value of the tilt was about 32°, and the tilt watch did not malfunction at that degree. Considered tohave credibility.

࣮࣮࢟࣡ࢻໟ⿦ࠊ㌿ಽ᳨▱ჾࠊࢸ࢕ࣝࢺ࢛࢘ࢵࢳࠊ᣺ື⾪ᧁࠊഴࡁKeywords  Packaging, Tipping Detector, Tilt Watch, Vibration Shock, Tilt*ࣟࢪࢫࢸ࢕࣮ࢻओ,LOGISTEED,Ltd.
㐃⤡⪅(Corresponding author), ࣟࢪࢫࢸ࢕࣮ࢻओ(ࠛ104-8350 ᮾி㒔୰ኸ༊ிᶫ஧୎┠ 9 ␒ 2 ྕ),      
LOGISTEED,Ltd. 2-9-2, Kyobashi, Cyuo-ku, Tokyo 104-8350, Japan            
Email: s-kanai@logisteed.com*－ 61 －日本包装学会誌 Vol.33 No.1（2024）

技術報告～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～㍺㏦᮲௳䛚䜘䜃᣺ືヨ㦂⎔ቃ䛻ᛂ䛨䛯㻌㻟 ㍈ຍ㏿ᗘ䝟䝽䞊䝇䝨䜽䝖䝹ᐦᗘ䛾タᐃ᪉ἲᕝ ཱྀ ࿴ ᫭ *Method for &reating 3-axis PSDs for Random Vibration TestConsidering Transport Condition and Test Environment
Kazuaki KAWAGUCHI* ໟ⿦㈌≀᣺ືヨ㦂ࡣࠊໟ⿦タィࡢ㜵᣺ᶵ⬟ࢆホ౯ࡍࡿࡓࡵࡢヨ㦂࡛࠶ࡾࠊࣛࣥࢲ࣒᣺ືヨ㦂᪉ἲࡀ୺ὶ࡛
࠶ࡿࠋヨ㦂᮲௳࡜࡞ࡿຍ㏿ᗘࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘ㸦PSD㸧ࡣࠊJIS Z 0200:2023࡟ᆶ┤᪉ྥࡢ୍ᐃ᮲௳ࡢࡳࡀつᐃࡉࢀ࡚࠸ࡿࡀࠊ୍᪉࡛ JIS Z 0232:2020࡟ࡼࡿ࡜ࠊ౑⏝ࡍࡿ㍺㏦㌴୧ࡸ㊰㠃≧ἣ࡟ࡼࡗ࡚ PSDࡣ኱ࡁࡃኚ໬ࡍࡿࡓࡵࠊᐇ ࢹ࣮ࢱ࡟ࡶ࡜࡙ࡃPSDࢆ⏝࠸ࡓヨ㦂ࡀ᥎ዡࡉࢀ࡚࠸ࡿࡶࡢࡢࠊᐇ ࢹ࣮ࢱࡢྲྀᚓࡣᐜ࡛᫆࡞࠸ࠋᮏሗ࿌࡛ࡣࠊᐇ ࢹ࣮ࢱྲྀᚓࡀᅔ㞴࡞ሙྜ࡛ࡶࠊࡼࡾ⌧ᐇࡢ㍺㏦᣺ື࡟㏆࠸᣺ືヨ㦂ࢆ⾜࠺ࡓࡵࡢPSDࢆ⡆᫆࡟タᐃ࡛ࡁࡿ᪉ἲࡢᥦ᱌ࢆ┠ⓗ࡜ࡋࠊ᪥ᮏᅜෆࡢࢺࣛࢵࢡ㍺㏦࡜㕲㐨㍺㏦࡛ィ ࡉࢀࡓ3㍈᣺ືࢹ࣮ࢱࢆࡶ࡜࡟ࡋ࡚ࠊ௵ពࡢ㍺㏦᮲௳࠾ࡼࡧヨ㦂⎔ቃ࡟༶ࡋࡓ᪉ྥูࡢࣛࣥࢲ࣒᣺ືヨ㦂⏝PSDࣉࣟࣇ࢓࢖ࣝࡢタᐃ᪉ἲࢆ♧ࡋࡓࠋVibration tests have been conducted for a package using a random vibration method to evaluate the anti-vibration
function of the package. The acceleration power spectral density (PSD) as a random vibration test condition isregulated using JIS Z0200:2023, which only demonstrates the vertical condition. However, JIS Z0232:2020
proposes the use of PSD developed using actual transport vibration data obtained through field-data recording
owing to significant changes in the shape of PSD curves based on various transport conditions. However, therecording of actual transport data is often difficult.
This study proposes a method to determine PSD for conducting a more realistic random vibration test than the useof JIS-based PSD, even with the difficulties involved in individually collecting field data. I propose a simple
calculation method for PSD test profile based on random transport conditions and test environment using actual
transport PSD curves obtained through truck and rail vibrations with three-axis.
࣮࣮࢟࣡ࢻໟ⿦タィࠊ᣺ືヨ㦂ࠊࣃ࣮࣡ࢫ࣌ࢡࢺࣝᐦᗘࠊᐇ㍺㏦ㄪᰝ
Keywords Package Design, Vibration Test, Power Spectrum Density, Field Data Measurement*⚄ᰤࢸࢡࣀࣟࢪ࣮ᰴᘧ఍♫, SHINYEI TECHNOLOGY CO.LTD. ࠛ650-0047 ⚄ᡞᕷ୰ኸ༊ ᓥ 6-5-2
6-5-2, Minatojima-Minamimachi, Chuo-ku, Kobe, 650-0047, JAPANTEL:078-304-6795, FAX:078-302-1225, Email:k-kawaguchi@stc.shinyei.co.jp－ 67 －