JP3990588B2

JP3990588B2 - palette

Info

Publication number: JP3990588B2
Application number: JP2002111936A
Authority: JP
Inventors: 健二鈴木
Original assignee: Gifu Plastic Industry Co Ltd
Current assignee: Gifu Plastic Industry Co Ltd
Priority date: 2002-04-15
Filing date: 2002-04-15
Publication date: 2007-10-17
Anticipated expiration: 2022-04-15
Also published as: JP2003300528A

Description

【０００１】
【発明の属する技術分野】
本発明は、パレットに関するものである。
【０００２】
【従来の技術】
従来から表面部と裏面部との間に桁部を配設するとともに隣接する桁部間にフォーク挿入孔を形成し、フォーク挿入孔の上面部に隣接する桁部間に複数の桁部連結用上リブを架設したパレットが知られている。このパレットのフォーク挿入孔にフォークを挿入する際、フォークの先端が複数の桁部連結用上リブのうちフォーク挿入孔の入口端部側に位置する桁部連結用上リブに当たり、フォークを挿入することができず、場合によっては複数の桁部連結用上リブのうちフォーク挿入孔の入口端部側に位置する桁部連結用上リブを破損してしまうという問題がある。
【０００３】
【発明が解決しようとする課題】
本発明は上記の点に鑑みてなされたものであり、フォーク挿入孔にフォークを挿入するに当たって、簡単な構成でフォーク挿入孔の入口端部側に位置する桁部連結用上リブを破損することなくスムーズにフォーク挿入孔にガイドできると共に桁部連結用上リブの補強を行って、フォークが当たることによる桁部連結用上リブの変形、破損を防止することができるパレットを提供することを課題とするものである。
【０００４】
【課題を解決するための手段】
上記課題を解決するために本発明に係るパレットは、表面部１と裏面部２との間に桁部３を配設するとともに隣接する桁部３間にフォーク挿入孔４を形成したパレットにおいて、フォーク挿入孔４の上面部に隣接する桁部３間に架設した複数の桁部連結用上リブ１３と、フォーク挿入孔４へのフォーク挿入方向と平行で且つ上記桁部連結用上リブ１３と一体に交差する複数列の挿入方向上リブ１４とを設け、複数の桁部連結用上リブ１３のうちフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を表面部１のフォーク挿入孔４の入口８端部よりもやや後方にずれた位置に配置し、表面部のフォーク挿入孔４の入口８端部付近からフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３にかけて下端縁部がフォーク挿入孔４の入口８端部側に向かう程上となるように上り傾斜したガイド用傾斜リブ２０を設け、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３の下端部から背方に向けて補強横リブ２１を突設し、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の出隅側を断面弧状となった曲面２２ａとすると共に挿入方向上リブ１４間において該コーナ部分の内隅側に内隅側補強リブ３０を形成して成ることを特徴とするものである。
【０００５】
このような構成とすることで、フォーク挿入孔４にフォークを挿入する際、表面部１の前端部分にフォークの先端部が衝突しても、フォークリフトのフォークの先端部がガイド用傾斜リブ２０にガイドされてスムーズにフォーク挿入孔４内に挿入されるものであってフォークの先端部がフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を破損することがないものであり、また、ガイド用傾斜リブ２０にフォークの先端部が食い込んだり、あるいは、桁部連結用上リブ１３の下端部に当たっても、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の出隅部分の曲面２２ａによりガイドされてスムーズにフォーク挿入孔４内に挿入されるものであり、この点でも桁部連結用上リブ１３が変形したり、破損したりしないものであり、更に、ガイド用傾斜リブ２０にフォークの先端部が食い込んだり、あるいはガイド用傾斜リブ２０にフォークの先端部により大きな衝撃力が加わっても、補強横リブ２１により桁部連結用上リブ１３の補強がしてあると共にコーナ部分の内隅側に内隅側補強リブ３０を形成してあるので、桁部連結用上リブ１３にかかる衝撃を挿入方向上リブ１４で支持できるだけでなく、補強横リブ２１と、挿入方向上リブ１４間においてコーナ部分の内隅側に設けた内隅側補強リブ３０とで桁部連結用上リブ１３を強固に補強して桁部連結用上リブ１３の変形や破損を防止することができ、特に、コーナ部の破損を防止できるものである。
【０００６】
また、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を上に行く程フォーク挿入孔４の入口８端部側に向かうように上り傾斜とし、このフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３の下端部付近から表面部１のフォーク挿入孔４の入口８端部にかけて下端縁部がフォーク挿入孔４の入口８端部側に向かう程上となるように上り傾斜したガイド用傾斜リブ２０を設けることが好ましい。このような構成とすることで、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３自身が傾斜しているので、仮にガイド用傾斜リブ２０にフォークの先端部が食い込んでフォークの先端部が桁部連結用上リブ１３に衝突するようなことがあっても、傾斜した桁部連結用上リブ１３にガイドされてフォークをフォーク挿入孔４内にスムーズに挿入できるものである。
【０００７】
また、挿入方向上リブ１４の端部をフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を介してフォーク挿入孔４の入口８端部方向に一体に延設してガイド用傾斜リブ２０を形成することが好ましい。このような構成とすることで、ガイド用傾斜リブ２０にフォークの先端が当たった際の衝撃を平面視で一直線状となった挿入方向上リブ１４で受けることができて、連結用上リブ１３の変形及び破損を防止できるものである。
【０００８】
【発明の実施の形態】
以下、本発明を添付図面に示す実施形態に基づいて説明する。
【０００９】
図１乃至図９には本発明のパレット５の一実施形態が示してある。パレット５は合成樹脂によって一体に射出成形してあり、平面視四角形状をした表面部１と平面視四角形状をした裏面部２との間に桁部３を配設すると共に隣接する桁部３間にフォーク挿入孔４を構成して形成してある。添付図面に示す実施形態においては、桁部３が筒状桁３ａにより構成してあり、桁部表面部１と裏面部２の隅部同士を連結する４個の隅の筒状桁３ａと、表面部１と裏面部２との周囲の中間部同士を連結する４個の中間の筒状桁３ａと、表面部１と裏面部２の中央部同士を連結する１個の中央部の筒状桁３ａにより連結してある。このように、表面部１と裏面部２とを４個の隅の筒状桁３ａと、４個の中間の筒状桁３ａと、１個の中央部の筒状桁３ａとにより一体に連結することで、上記の筒状桁３ａ間にフォーク挿入孔４が井の字状に形成された四方差しパレット５を構成してある。
【００１０】
なお、図示を省略しているが、パレット５の対向する２辺に沿って平行な細長い桁部３とし、この細長い桁部３を平面視四角形状をした表面部１の両端縁部と裏面部２の両端片部間に配設すると共に、両側の桁部３の中間に１つの中間の桁部３を配設して、細長い両側の桁部３と細長い中間の桁部３との間にそれぞれフォーク挿入孔４を形成してもよく、この場合には二方差しのパレット５が構成される。
【００１１】
図２、図３に示すように、フォーク挿入孔４の両内側面部を構成する対向する桁部３の対向側壁部６の上端部間には複数の桁部連結用上リブ１３が架設してあり、この桁部連結用上リブ１３はフォーク挿入孔４の上面部の下面側に設けてある。フォーク挿入孔４の上面部の下面側には更にフォーク挿入孔４のフォーク挿入方向と平行で且つ上記桁部連結用上リブ１３と交差一体化した挿入方向上リブ１４が設けてある。
【００１２】
ここで、図１に示すように、複数の桁部連結用上リブ１３のうちフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を表面部１のフォーク挿入孔４の入口８端部よりもやや後方にずれた位置に配置してあり、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３の下端部付近から表面部１のフォーク挿入孔８の入口８端部にかけて下端縁部がフォーク挿入孔８の入口８端部側に向かう程上となるように上り傾斜したガイド用傾斜リブ２０を設けてある。この複数のガイド用傾斜リブ２０の一部又は全部は挿入方向上リブ１４の端部を一体に延設して構成してある。
【００１３】
また、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３の下端部から背方に向けて補強横リブ２１が突設してあり、この補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分は図１に示すように断面弧状となった曲面部２２となっており、このため、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の出隅は断面弧状をした曲面２２ａとなっている。添付図面に示す実施形態では補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分が曲面部２２となっているが、コーナ部分の出隅のみが曲面２２ａであってもよい。
【００１４】
なお、補強用横リブ２１の下端は桁部連結用上リブ１３の下端及び挿入方向上リブ１４の下端と同一レベルとなっていて、フォーク挿入時に補強用横リブ２１に邪魔されることなく支障なく挿入できるようになっている。
【００１５】
なお、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の出隅の断面弧状をした曲面２２ａは、１Ｒというような極僅かな断面弧状でも本発明における曲面の定義の範疇に含まれるものとする。
【００１６】
補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の内隅側には挿入方向上リブ１４間において１乃至複数個内隅側補強リブ３０を形成してある。この内隅側補強リブ３０はフォーク挿入方向と同方向（つまり桁部連結用上リブ１３と直交する方向）をしており、コーナ部分である曲面部２２の内隅部のみに設けてもよく、あるいは、コーナ部分である曲面部２２の内隅部を含んで補強横リブ２１乃至桁部連結用上リブ１３のいずれか一方又は両方に至るように形成してもよい。
【００１７】
また、図４に示すように、フォーク挿入孔４の両内側面部を構成する対向する桁部３の対向側壁部６の下端部間には桁部連結用下リブ７が架設してあり、この桁部連結用下リブ７はフォーク挿入孔４の下面部に設けてある。フォーク挿入孔４の下面部にはフォーク挿入孔４のフォーク挿入方向と平行で且つ上記桁部連結用下リブ７と交差一体化した挿入方向下リブ１５が設けてある。
【００１８】
また、フォーク挿入孔４の入口８両内側面部を構成する対向する桁部３の対向側壁部６は傾斜した傾斜側壁部９となっていて該対向側壁部６の前部の間隔が外方程広くなるようになっている。
【００１９】
更に、フォーク挿入孔４の下面部の入口８側の端部は外方程下となるように下り傾斜した入口下傾斜面部１０となっている。この入口下傾斜面部１０の下面部には上記挿入方向下リブ１５の先端部が設けてある。入口下傾斜面部１０の両端部は桁部３の傾斜側壁部９に至るまで面一に連出してあって傾斜側壁部９と一体化した入口下隅傾斜面部１１が形成してある。
【００２０】
上記のように、フォーク挿入孔４の上面部の入口８側端部にガイド用傾斜リブ２０を設け、フォーク挿入孔４の入口８両内側面部を構成する対向する桁部３の対向側壁部６の前部の間隔を外方程広くなるようにして上記入口８の両内側面部を傾斜側壁部９とし、フォーク挿入孔４の下面部の入口８側の端部を外方程下となるように下り傾斜した入口下傾斜面部１０とし、入口下傾斜面部１０の両端部を桁部３の傾斜側壁部９に至るまで面一に連出して傾斜側壁部９と一体化した入口下隅傾斜面部１１を形成してあるので、フォーク挿入孔４にフォークを挿入する際、ガイド用傾斜リブ２０、傾斜側壁部９、入口下傾斜面部１０、入口下隅傾斜面部１１の傾斜により入口８部分でスムーズにガイドしてフォークをフォーク挿入孔４に挿入することができるようになっている。
【００２１】
ここで、フォーク挿入孔４にフォークを挿入する時に表面部１の前端部分にフォークの先端部が衝突した際、フォークリフトのフォークの先端部がガイド用傾斜リブ２０にガイドされてスムーズにフォーク挿入孔４内に挿入するのであるが、この場合、仮にフォーク挿入方向と平行なガイド用傾斜リブ２０にフォークの先端部が食い込んでも、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の出隅側の曲面２２ａでフォークの先端部がガイドされてスムーズにフォーク挿入孔４内に挿入されるものであり、この結果、フォークの先端がガイド用傾斜リブ２０に食い込んでもフォーク挿入方向と直交する桁部連結用上リブ１３を破損することなく、フォークの先端部をフォーク挿入孔４内にスムーズにガイドして挿入できるものである。また、この場合、桁部連結用上リブ１３は補強横リブ２１で補強してあることで、この点でも桁部連結用上リブ１３の破損を防止できるものである。更に、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の内隅側に内隅側補強リブ３０を設けてあるので、補強横リブ２１と桁部連結用上リブ１３とのなすコーナ部分の補強がなされると共に桁部連結用上リブ１３をフォーク挿入方向と反対側から内隅側補強リブ３０により支えることになり、桁部連結用上リブ１３の変形及び破損をより確実に防止することができるものである。
【００２２】
なお、図１に示す実施形態においてはガイド用傾斜リブ２０のフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３から前方に突出した突出基部において水平部分を設け、この水平部分の先端部からガイド用傾斜リブ２０の下端縁を上り傾斜させてあるが、図１０に示すように、ガイド用傾斜リブ２０の下端縁部をフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３から前方に突出した突出基部から上り傾斜させてもよいものである。また、図１１、図１２はそれぞれ本発明のガイド用傾斜リブ２０の下端の桁部連結用上リブ１３からの突出位置の違う各例を示すその他の実施形態が示してある。
【００２３】
また、図９に示すように、入口下傾斜面部１０の両端の入口下隅傾斜面部１１を連出した部分の近傍の下面部にはフォーク挿入孔４のフォーク挿入方向に略平行な補強リブ１２が形成してあり、この補強リブ１２の後端部が入口下傾斜面部１０の後端部の下面部に設けた対向する両傾斜側壁部９の後端部の下部間を連結する桁部連結用下リブ７に一体に連結してあり、補強リブ１２の前端部が入口下傾斜面部１０の前端部の下面部に設けた対向する両傾斜側壁部９の前端部の下部間を連結する桁部連結用下リブ７に一体に連結してある。
【００２４】
このように入口下傾斜面部１０の両端の入口下隅傾斜面部１１を連出した部分の近傍の下面部にはフォーク挿入孔４のフォーク挿入方向に略平行な補強リブ１２が形成してあることで、傾斜側壁部９の側端部付近にフォークの先端が当たっても、この部分がフォーク挿入方向に略平行な補強リブ１２により補強されて、補強リブ１２により入口８側に位置する桁部連結用下リブ７がねじれるのを防止できるものである。したがって、入口下傾斜面部１０の側端部付近に亀裂が発生したり、破損が生じたり、あるいは補強リブ１２が桁部連結用下リブ７に一体化することで、桁部３の傾斜側壁部９の下端部の補強ができ、桁部連結用下リブ７及び傾斜側壁部９の破損が防止できるものである。
【００２５】
図１３、図１４には本発明の更に他の実施形態が示してあり、本実施形態においては複数の桁部連結用上リブ１３のうちフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３を図１３、図１４に示すように、上に行く程フォーク挿入孔４の入口８端部側に向かうように上り傾斜とし、このフォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３の下端部付近から表面部１のフォーク挿入孔４の入口８端部にかけて下端縁部がフォーク挿入孔４の入口８端部側に向かう程上となるように上り傾斜したガイド用傾斜リブ２０を設けた点に特徴があり、他の構成は前述の実施形態と同様であるので、重複する構成の説明は省略する。
【００２６】
本実施形態においては、ガイド用傾斜リブ２０にフォークの先端が当たっても、図１３においてはガイド用傾斜リブ２０→コーナ部の出隅の曲面２２ａという順序で、又図１４においてはガイド用傾斜リブ２０→傾斜した桁部連結用上リブ１３→コーナ部の出隅の曲面２２ａという順序でスムーズにフォークをガイドしてフォーク挿入孔４内に挿入できるものであって、フォークの先端が桁部連結用上リブ１３に当たってそれ以上挿入できないというような事態を避けることができるものであり、また、仮にガイド用傾斜リブ２０の上下方向のどの位置においてフォークの先端部が食い込んでフォークの先端部が桁部連結用上リブ１３に衝突するようなことがあっても、フォーク挿入孔４の入口８端部側に位置する桁部連結用上リブ１３自身が傾斜しているので、傾斜した桁部連結用上リブ１３にガイドされてフォークをフォーク挿入孔４内にスムーズに挿入できるものである。
【００２７】
また、入口下傾斜面部１０の前端部と後端部との下面部にはそれぞれ両側の桁部３の下端部間を連結する桁部連結用下リブ７が配設してある。ここで、入口下傾斜面部１０の後端部の下面部に設けた桁部連結用下リブ７は桁部３の入口側下傾斜面部１０の後端部付近において桁部３と一体に連結してあり、また、入口下傾斜面部１０の前端部の下面部に設けた桁部連結用下リブ７は桁部３の入口側下傾斜面部１０の前端部において桁部３と一体に連結してある。
【００２８】
なお、上記実施形態においては合成樹脂によって一体に射出成形してパレット５を形成した例を示しているが、合成樹脂により一体に成形した上パレット半体と合成樹脂により一体に成形した下パレット半体とを溶着等の固着手段により上下方向に結合してパレット５を構成したものであってもよい。
【００２９】
また、図１５には本発明の他の実施形態が示してある。本実施形態では、フォーク挿入孔４の上面部の入口８側端部を前述と同様の構成とすると共に下面側の入口８側端部を上面側の入口８側端部と同様の構成とした例の一実施形態を示している。このものにおいてはパレットを上下反転して使用した場合、下面側が新たな上面側となり、上記実施形態で説明したのと同様の作用効果を奏するものである。
【００３０】
【発明の効果】
上記のように本発明の請求項１記載の発明にあっては、フォーク挿入孔の上面部に隣接する桁部間に架設した複数の桁部連結用上リブと、フォーク挿入孔へのフォーク挿入方向と平行で且つ上記桁部連結用上リブと一体に交差する複数列の挿入方向上リブとを設け、複数の桁部連結用上リブのうちフォーク挿入孔の入口端部側に位置する桁部連結用上リブを表面部のフォーク挿入孔の入口端部よりもやや後方にずれた位置に配置し、表面部のフォーク挿入孔の入口端部付近からフォーク挿入孔の入口端部側に位置する桁部連結用上リブにかけて下端縁部がフォーク挿入孔の入口端部側に向かう程上となるように上り傾斜したガイド用傾斜リブを設けてあるので、フォーク挿入孔にフォークを挿入する際、表面部の前端部分にフォークの先端部が衝突しても、フォークリフトのフォークの先端部がガイド用傾斜リブにガイドされてスムーズにフォーク挿入孔内に挿入され、この結果簡単な構成でフォークの挿入がスムーズに行えるとともにフォークの先端部によりフォーク挿入孔の入口端部側に位置する桁部連結用上リブが破損されないものであり、また、フォーク挿入孔の入口端部側に位置する桁部連結用上リブの下端部から背方に向けて補強横リブを突設し、補強横リブと桁部連結用上リブとのなすコーナ部分の出隅側を断面弧状となった曲面とすると共に該コーナ部分の内隅側に内隅側補強リブを形成してあるので、仮にガイド用傾斜リブに衝突したフォークの先端部が仮にガイド用傾斜リブに食い込むようなことが発生しても、補強横リブと桁部連結用上リブとのなすコーナ部分の出隅側の曲面によりガイドされてスムーズにフォーク挿入孔内に挿入できるものであり、この結果、ガイド用傾斜リブにフォークの先端が食い込んでもフォーク挿入方向と直交する桁部連結用上リブを破損することがないものであり、また、ガイド用傾斜リブにフォークの先端部が食い込んだり、あるいは、桁部連結用上リブの下端部に当たっても、補強横リブと桁部連結用上リブとのなすコーナ部分の出隅部分の曲面によりガイドされてスムーズにフォーク挿入孔内に挿入されるものであり、この点でも桁部連結用上リブが変形したり、破損したりしないものであり、更に、ガイド用傾斜リブにフォークの先端部が食い込んだり、あるいはガイド用傾斜リブにフォークの先端部により大きな衝撃力が加わっても、桁部連結用上リブにかかる衝撃を挿入方向上リブで支持できるだけでなく、補強横リブにより桁部連結用上リブの補強がしてあると共に挿入方向上リブ間においてコーナ部分の内隅側に内隅側補強リブを形成してあるので、桁部連結用上リブの変形や破損を補強横リブとコーナ部分の内隅側に内隅側補強リブとで強固に補強して桁部連結用上リブの変形や破損を防止することができるものである。
【００３１】
また、請求項２記載の発明にあっては、上記請求項１記載の発明の効果に加えて、フォーク挿入孔の入口端部側に位置する桁部連結用上リブを上に行く程フォーク挿入孔の入口端部側に向かうように上り傾斜とし、このフォーク挿入孔の入口端部側に位置する桁部連結用上リブの下端部付近から表面部のフォーク挿入孔の入口端部にかけて下端縁部がフォーク挿入孔の入口端部側に向かう程上となるように上り傾斜したガイド用傾斜リブを設けてあるので、仮にガイド用傾斜リブにフォークの先端部が食い込んでフォークの先端部が桁部連結用上リブに衝突するようなことがあっても、傾斜した桁部連結用上リブにガイドされてフォークをフォーク挿入孔内にいっそうスムーズに挿入でき、フォークの先端部が桁部連結用上リブに突き当たったままの状態でそれ以上挿入できなかったり、あるいは桁部連結用上リブを変形させたり、破損したりするおそれがないものである。
【００３２】
また、請求項３記載の発明にあっては、上記請求項１又は請求項２記載の発明の効果に加えて、挿入方向上リブの端部をフォーク挿入孔の入口端部側に位置する桁部連結用上リブを介してフォーク挿入孔の入口端部方向に一体に延設してガイド用傾斜リブを形成するので、ガイド用傾斜リブにフォークの先端が当たった際の衝撃を平面視で一直線状となった挿入方向上リブで受けることができて、連結用上リブの変形及び破損を防止できるものである。
【図面の簡単な説明】
【図１】本発明のパレットのフォーク挿入孔の入口部分の拡大断面図である。
【図２】本発明のパレットの斜視図である。
【図３】同上の平面図である。
【図４】同上の底面図である。
【図５】同上の正面図である。
【図６】同上の側面図である。
【図７】同上の底面図である。
【図８】同上のフォーク挿入孔の入口部分の拡大正面図である。
【図９】同上のフォーク挿入孔の入口部分の拡大底面図である。
【図１０】本発明の他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【図１１】本発明の更に他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【図１２】本発明の更に他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【図１３】本発明の更に他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【図１４】本発明の更に他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【図１５】本発明の更に他の実施形態のフォーク挿入孔の入口部分の拡大断面図である。
【符号の説明】
１表面部
２裏面部
３桁部
４フォーク挿入孔
５パレット
８入口
２０ガイド用傾斜リブ
２１補強横リブ
２２ａ曲面
３０内隅側補強リブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pallet.
[0002]
[Prior art]
Conventionally, a girder portion is provided between the front surface portion and the back surface portion, a fork insertion hole is formed between adjacent girder portions, and a plurality of girder portions are connected between the girder portions adjacent to the upper surface portion of the fork insertion hole. A pallet with an upper rib is known. When inserting a fork into the fork insertion hole of this pallet, the fork tip hits the upper rib for connecting the beam portion located on the inlet end side of the fork insertion hole among the plurality of upper ribs for connecting the beam portion, and inserts the fork. In some cases, there is a problem that the upper rib for connecting the spar portion located on the inlet end side of the fork insertion hole among the plurality of upper ribs for connecting the spar portion is damaged.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and when inserting a fork into the fork insertion hole, the upper rib for connecting the girder part located on the inlet end side of the fork insertion hole is broken with a simple configuration. It is possible to provide a pallet that can be smoothly guided to the fork insertion hole and that can reinforce the upper rib for connecting the girder part and prevent deformation and breakage of the upper rib for connecting the girder part due to contact with the fork. It is what.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the pallet according to the present invention is a pallet in which a spar 3 is disposed between the front surface 1 and the back surface 2 and a fork insertion hole 4 is formed between the adjacent spar 3. A plurality of girder connecting upper ribs 13 laid between the girder parts 3 adjacent to the upper surface of the fork insertion hole 4, and the girder connecting upper ribs 13 parallel to the direction of fork insertion into the fork insertion hole 4. A plurality of rows of insertion direction upper ribs 14 that intersect with each other are provided, and of the plurality of beam portion connection upper ribs 13, the beam portion connection upper ribs 13 positioned on the inlet 8 end side of the fork insertion hole 4 are surface portions. The fork insertion hole 4 is located at a position slightly rearward from the end of the inlet 8 of the fork insertion hole 4 and is located on the surface of the fork insertion hole 4 from the vicinity of the inlet 8 end of the fork insertion hole 4 toward the inlet 8 end. The lower edge is inserted into the upper rib 13 for connecting the girder part. A guide inclined rib 20 is provided so as to rise upward toward the inlet 8 end side of the hole 4, and a lower end portion of the girder connecting upper rib 13 positioned on the inlet 8 end side of the fork insertion hole 4. Reinforcing lateral ribs 21 project from the back to the back, and the corners of the corners formed by the reinforcing lateral ribs 21 and the upper ribs 13 for connecting the girder are curved surfaces 22a having an arcuate cross section and An inner corner side reinforcing rib 30 is formed between the ribs 14 on the inner corner side of the corner portion.
[0005]
With such a configuration, even when the fork tip collides against the front end portion of the surface portion 1 when the fork is inserted into the fork insertion hole 4, the fork tip of the fork lift comes to the guide inclined rib 20. Guided and smoothly inserted into the fork insertion hole 4 so that the tip end of the fork does not damage the upper rib 13 for connecting the girder part located on the inlet 8 end side of the fork insertion hole 4 In addition, even if the leading end of the fork bites into the guide inclined rib 20 or hits the lower end of the upper rib 13 for connecting the spar, the corner formed by the reinforcing lateral rib 21 and the upper rib 13 for connecting the spar It is guided by the curved surface 22a of the protruding corner portion and is smoothly inserted into the fork insertion hole 4. Even at this point, the upper rib 13 for connecting the girder portion is not deformed or damaged. Further, even if the tip of the fork bites into the guide inclined rib 20 or a large impact force is applied to the guide inclined rib 20 due to the tip of the fork, the reinforcing ribs 21 connect the spar upper ribs. 13 and the inner corner side reinforcing rib 30 is formed on the inner corner side of the corner portion, so that not only can the impact on the upper rib 13 for connecting the girder part be supported by the upper rib 14 in the insertion direction, The upper rib 13 for connecting the girder portion is strongly reinforced by the reinforcing ribs 21 and the inner corner side reinforcing rib 30 provided on the inner corner side of the corner portion between the upper ribs 14 in the insertion direction. It is possible to prevent deformation and breakage, and in particular, it is possible to prevent breakage of the corner portion.
[0006]
Further, the fork insertion hole 4 is inclined upwardly toward the inlet 8 end side of the fork insertion hole 4 as the spar-connecting upper rib 13 positioned on the inlet 8 end side of the fork insertion hole 4 goes upward. From the vicinity of the lower end of the girder connecting upper rib 13 located on the inlet 8 end side to the inlet 8 end of the fork insertion hole 4 of the surface portion 1, the lower end edge is on the inlet 8 end side of the fork insertion hole 4. It is preferable to provide the inclined guide ribs 20 that are inclined upward so as to go upward. With such a configuration, the upper rib 13 for connecting the girder portion located on the inlet 8 end side of the fork insertion hole 4 is inclined, so that the tip of the fork bites into the guide inclined rib 20 temporarily. Even if the front end of the fork collides with the upper rib 13 for connecting the spar, the fork can be smoothly inserted into the fork insertion hole 4 by being guided by the inclined spar connecting upper rib 13. It is.
[0007]
Further, the end of the insertion direction upper rib 14 is integrally extended in the direction of the inlet 8 end of the fork insertion hole 4 via the beam connecting upper rib 13 located on the inlet 8 end side of the fork insertion hole 4. It is preferable to form the inclined rib 20 for guide. With such a configuration, the impact when the tip of the fork hits the guide inclined rib 20 can be received by the upper rib 14 in the insertion direction that is straight in a plan view. It is possible to prevent deformation and breakage.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0009]
1 to 9 show an embodiment of the pallet 5 of the present invention. The pallet 5 is integrally injection-molded with a synthetic resin, and a girder part 3 is disposed between a front surface part 1 having a square shape in plan view and a back surface part 2 having a square shape in plan view, and the adjacent girder part 3. A fork insertion hole 4 is formed between them. In the embodiment shown in the accompanying drawings, the girder part 3 is constituted by a cylindrical girder 3a, and the four girder cylindrical girder 3a connecting the corners of the girder surface part 1 and the back part 2; Four intermediate cylindrical girders 3a that connect the middle portions around the front surface portion 1 and the back surface portion 2 and one central cylindrical shape that connects the center portions of the front surface portion 1 and the back surface portion 2 to each other. It is connected by a digit 3a. Thus, the front surface portion 1 and the back surface portion 2 are integrally connected by the four corner cylindrical girders 3a, the four intermediate cylindrical girders 3a, and the one central cylindrical girder 3a. By doing so, the four-way pallet 5 in which the fork insertion hole 4 is formed in the shape of a well between the cylindrical girders 3a is configured.
[0010]
Although not shown in the drawings, the elongated spar 3 is parallel to two opposing sides of the pallet 5, and the both ends and the back surface of the surface 1 having a rectangular shape in plan view. 2 between the two end pieces, and one intermediate girder portion 3 is arranged between the girder portions 3 on both sides, and between the elongate side girder portions 3 and the elongate middle girder portion 3. Each of the fork insertion holes 4 may be formed, and in this case, a two-way pallet 5 is formed.
[0011]
As shown in FIGS. 2 and 3, a plurality of girder connecting upper ribs 13 are installed between the upper ends of the opposed side wall portions 6 of the opposed girder portions 3 constituting both inner side surfaces of the fork insertion hole 4. The upper rib 13 for connecting the beam portion is provided on the lower surface side of the upper surface portion of the fork insertion hole 4. On the lower surface side of the upper surface portion of the fork insertion hole 4, there is further provided an insertion direction upper rib 14 which is parallel to the fork insertion direction of the fork insertion hole 4 and intersects and is integrated with the above-mentioned beam portion coupling upper rib 13.
[0012]
Here, as shown in FIG. 1, the spar-connecting upper rib 13 positioned on the inlet 8 end side of the fork insertion hole 4 among the plurality of spar-connecting upper ribs 13 is connected to the fork insertion hole 4 in the surface portion 1. Fork insertion of the surface portion 1 from the vicinity of the lower end portion of the upper rib 13 for connecting the girder portion located on the inlet 8 end side of the fork insertion hole 4. An inclined guide rib 20 is provided so that the lower end edge of the hole 8 is inclined upward toward the inlet 8 end of the fork insertion hole 8 toward the inlet 8 end of the hole 8. A part or all of the plurality of guide inclined ribs 20 is formed by integrally extending the end of the upper rib 14 in the insertion direction.
[0013]
Further, a reinforcing lateral rib 21 protrudes from the lower end of the girder connecting upper rib 13 located on the inlet 8 end side of the fork insertion hole 4 toward the back. As shown in FIG. 1, the corner portion formed with the connecting upper rib 13 is a curved surface portion 22 having an arc-shaped cross section. For this reason, the corner portion formed between the reinforcing lateral rib 21 and the upper rib 13 for connecting the girder portion. The protruding corner is a curved surface 22a having an arcuate cross section. In the embodiment shown in the accompanying drawings, the corner portion formed by the reinforcing lateral rib 21 and the upper rib 13 for connecting the girder portion is the curved surface portion 22, but only the corner of the corner portion may be the curved surface 22a.
[0014]
The lower end of the reinforcing lateral rib 21 is at the same level as the lower end of the upper rib 13 for connecting the girder part and the lower end of the upper rib 14 in the inserting direction. Can be inserted without any problems.
[0015]
The curved surface 22a having a cross-sectional arc shape at the corner of the corner portion formed by the reinforcing lateral rib 21 and the upper rib 13 for connecting the girder portion is within the definition of the curved surface in the present invention even if it has a very slight cross-sectional arc shape such as 1R. Shall be included.
[0016]
One or a plurality of inner corner side reinforcing ribs 30 are formed between the upper ribs 14 in the insertion direction on the inner corner side of the corner portion formed by the reinforcing lateral rib 21 and the upper rib 13 for connecting the beam portion. This inner corner side reinforcing rib 30 has the same direction as the fork insertion direction (that is, the direction orthogonal to the upper rib 13 for connecting the girder portion), and may be provided only at the inner corner portion of the curved surface portion 22 that is a corner portion. Alternatively, it may be formed so as to reach either one or both of the reinforcing lateral rib 21 and the upper rib 13 for connecting the girder part including the inner corner part of the curved surface part 22 which is a corner part.
[0017]
Further, as shown in FIG. 4, a lower rib 7 for connecting a girder part is provided between the lower ends of the opposite side wall parts 6 of the opposite girder part 3 constituting both inner side surfaces of the fork insertion hole 4, The lower rib 7 for connecting the girder portion is provided on the lower surface portion of the fork insertion hole 4. A lower rib 15 in the insertion direction is provided on the lower surface of the fork insertion hole 4 so as to be parallel to the fork insertion direction of the fork insertion hole 4 and to be integrated with the lower rib 7 for connecting the beam part.
[0018]
Further, the opposing side wall 6 of the opposite girder 3 constituting the inner side surfaces of the inlet 8 of the fork insertion hole 4 is an inclined side wall 9 and the front portion of the opposite side wall 6 is wider outward. It is supposed to be.
[0019]
Further, the end portion on the inlet 8 side of the lower surface portion of the fork insertion hole 4 is an inlet lower inclined surface portion 10 that is inclined downward so as to be lower outward. A tip end portion of the insertion direction lower rib 15 is provided on a lower surface portion of the lower inclined surface portion 10 of the entrance. Both end portions of the lower entrance inclined surface portion 10 are flush with each other up to the inclined side wall portion 9 of the girder 3, and the lower entrance corner inclined surface portion 11 integrated with the inclined side wall portion 9 is formed.
[0020]
As described above, the inclined rib 20 for guide is provided at the end portion on the inlet 8 side of the upper surface portion of the fork insertion hole 4, and the opposing side wall portion 6 of the opposing beam portion 3 constituting the inner side surfaces of both the inlet 8 of the fork insertion hole 4. The both inner side surfaces of the inlet 8 are inclined side wall portions 9 so that the distance between the front portions of the fork insertion holes 4 is decreased, and the end portion on the inlet 8 side of the lower surface portion of the fork insertion hole 4 is lowered downward. The inclined lower surface 10 of the entrance is inclined, and both end portions of the lower inclined surface 10 of the entrance are flush with the inclined side wall 9 of the girder 3 so as to form an inclined lower corner surface 11 integrated with the inclined side wall 9. Therefore, when the fork is inserted into the fork insertion hole 4, the guide inclined rib 20, the inclined side wall portion 9, the inlet lower inclined surface portion 10, and the inlet lower corner inclined surface portion 11 are smoothly guided at the inlet 8 portion. Insert the fork into the fork insertion hole 4 So that the can.
[0021]
Here, when the front end of the fork collides with the front end portion of the surface portion 1 when the fork is inserted into the fork insertion hole 4, the front end of the fork of the forklift is guided by the guide inclined rib 20 so that the fork insertion hole smoothly. In this case, even if the tip of the fork bites into the guide inclined rib 20 parallel to the fork insertion direction, the corner portion formed by the reinforcing lateral rib 21 and the upper rib 13 for connecting the girder portion. The front end of the fork is guided by the curved surface 22a on the protruding corner side and smoothly inserted into the fork insertion hole 4. As a result, even if the front end of the fork bites into the inclined rib 20 for guide, The tip of the fork can be smoothly guided and inserted into the fork insertion hole 4 without damaging the orthogonal rib connecting upper ribs 13. That. In this case, the upper rib 13 for connecting the girder part is reinforced by the reinforcing lateral rib 21, so that the damage to the upper rib 13 for connecting the girder part can be prevented also in this respect. Furthermore, since the inner corner side reinforcing rib 30 is provided on the inner corner side of the corner portion formed by the reinforcing horizontal rib 21 and the upper rib 13 for connecting the girder portion, In addition to reinforcing the corner portion formed, the upper rib 13 for connecting the girder part is supported by the inner corner side reinforcing rib 30 from the opposite side to the fork insertion direction, and the deformation and breakage of the upper rib 13 for connecting the girder part is more reliably performed. Can be prevented.
[0022]
In the embodiment shown in FIG. 1, a horizontal portion is provided at the protruding base portion that protrudes forward from the upper rib 13 for connecting the spar portion located on the inlet 8 end side of the fork insertion hole 4 of the inclined rib 20 for guide, Although the lower end edge of the inclined guide rib 20 is inclined upward from the tip of the horizontal portion, the lower end edge of the inclined guide rib 20 is on the inlet 8 end side of the fork insertion hole 4 as shown in FIG. It may be inclined upward from a protruding base portion protruding forward from the upper rib 13 for connecting the spar portion. FIG. 11 and FIG. 12 show other embodiments showing different examples of protruding positions from the beam connecting upper rib 13 at the lower end of the guide inclined rib 20 of the present invention.
[0023]
Further, as shown in FIG. 9, reinforcing ribs 12 substantially parallel to the fork insertion direction of the fork insertion hole 4 are formed on the lower surface portion in the vicinity of the portion where the inlet lower corner inclined surface portions 11 at both ends of the inlet lower inclined surface portion 10 are extended. It is formed, and the rear end portion of the reinforcing rib 12 is for connecting the lower portion of the rear end portions of the opposite inclined side wall portions 9 provided on the lower surface portion of the rear end portion of the inlet lower inclined surface portion 10. A girder that is integrally connected to the lower rib 7 and that connects the lower ends of the front end portions of the opposing inclined side wall portions 9 provided at the front end portion of the reinforcing rib 12 on the lower surface portion of the front end portion of the inlet lower inclined surface portion 10. The lower rib 7 for connection is integrally connected.
[0024]
Thus, the reinforcing ribs 12 substantially parallel to the fork insertion direction of the fork insertion hole 4 are formed on the lower surface portion in the vicinity of the portion where the inlet lower corner inclined surface portions 11 at both ends of the inlet lower inclined surface portion 10 are extended. Even if the tip of the fork hits the side end portion of the inclined side wall portion 9, this portion is reinforced by the reinforcing rib 12 substantially parallel to the fork insertion direction, and the girder portion located on the inlet 8 side is connected by the reinforcing rib 12. The lower rib 7 can be prevented from being twisted. Therefore, a crack is generated near the side end portion of the lower inclined surface portion 10 of the entrance, breakage occurs, or the reinforcing rib 12 is integrated with the lower rib 7 for connecting the spar portion, so that the inclined side wall portion of the spar portion 3 is integrated. 9 can reinforce the lower end portion, and can prevent damage to the lower rib 7 for connecting the girder portion and the inclined side wall portion 9.
[0025]
FIG. 13 and FIG. 14 show still another embodiment of the present invention. In this embodiment, the spar located on the inlet 8 end side of the fork insertion hole 4 among the plurality of spar connecting upper ribs 13. As shown in FIGS. 13 and 14, the upper rib 13 for connecting the portion is inclined upward toward the inlet 8 end side of the fork insertion hole 4 as it goes upward, and the inlet 8 end side of the fork insertion hole 4 From the vicinity of the lower end portion of the upper rib 13 for connecting the spar portion to the end portion of the inlet 8 of the fork insertion hole 4 in the surface portion 1, the lower end edge becomes higher toward the inlet 8 end portion side of the fork insertion hole 4. Since the guide inclined rib 20 that is inclined upward is provided, and the other configuration is the same as that of the above-described embodiment, the description of the overlapping configuration is omitted.
[0026]
In this embodiment, even if the tip of the fork hits the guide inclined rib 20, the guide inclined rib 20 → the curved surface 22a at the corner of the corner in FIG. 13 and the guide inclined in FIG. The fork can be smoothly guided and inserted into the fork insertion hole 4 in the order of the rib 20 → the inclined upper rib 13 for connecting the girder → the curved surface 22a at the corner of the corner. It is possible to avoid a situation where the upper rib 13 for connection cannot be inserted any more, and the tip of the fork bites into any position in the vertical direction of the guide inclined rib 20 so that the tip of the fork Even if it collides with the upper rib 13 for connecting the girder part, the upper rib 13 for connecting the girder part located on the inlet 8 end side of the fork insertion hole 4 itself Since inclined, in which is guided on a rib 13 for the inclined girder connected can be inserted smoothly fork to the fork insertion hole 4.
[0027]
Further, the lower ribs 7 for connecting the spar portions for connecting the lower end portions of the spar portions 3 on both sides are disposed on the lower surface portions of the front end portion and the rear end portion of the entrance lower inclined surface portion 10. Here, the lower rib 7 for connecting the girder portion provided on the lower surface of the rear end portion of the lower inclined surface portion 10 of the inlet is connected integrally with the girder portion 3 in the vicinity of the rear end portion of the lower inclined surface portion 10 of the inlet side of the girder portion 3. Further, the lower rib 7 for connecting the girder portion provided on the lower surface portion of the front end portion of the lower inclined surface portion 10 of the entrance is integrally connected to the girder portion 3 at the front end portion of the lower inclined surface portion 10 of the entrance side of the girder portion 3. is there.
[0028]
In the above embodiment, an example in which the pallet 5 is formed by injection molding integrally with a synthetic resin is shown. However, an upper pallet half integrally molded with a synthetic resin and a lower pallet half integrally molded with a synthetic resin are shown. The pallet 5 may be configured by joining the body in the vertical direction by fixing means such as welding.
[0029]
FIG. 15 shows another embodiment of the present invention. In this embodiment, the inlet 8 side end of the upper surface of the fork insertion hole 4 has the same configuration as described above, and the lower surface of the inlet 8 side has the same configuration as the upper surface of the inlet 8 side. 1 illustrates one embodiment of an example. In this case, when the pallet is used upside down, the lower surface side becomes a new upper surface side, and the same effect as described in the above embodiment is achieved.
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, a plurality of upper ribs for connecting the beam portions, which are installed between the beam portions adjacent to the upper surface portion of the fork insertion hole, and insertion of the fork into the fork insertion hole A plurality of rows of insertion direction upper ribs that are parallel to the direction and intersect with the above-mentioned spar-connecting upper ribs integrally, and of the plurality of spar-connecting upper ribs, located on the inlet end side of the fork insertion hole The upper rib for connecting the part is located at a position slightly rearward of the inlet end of the fork insertion hole on the surface part, and is located on the inlet end side of the fork insertion hole from the vicinity of the inlet end of the fork insertion hole on the surface part. When the fork is inserted into the fork insertion hole, the guide inclination rib is provided so that the lower end edge of the upper end rib extends upward toward the inlet end of the fork insertion hole. The tip of the fork at the front end of the surface Even if there is a collision, the tip of the fork of the forklift is guided by the guide inclined rib and is smoothly inserted into the fork insertion hole. As a result, the fork can be inserted smoothly with a simple configuration, and the fork by the tip of the fork The upper rib for connecting the girder part located on the inlet end side of the insertion hole is not damaged, and the rear side of the upper rib for connecting the girder part located on the inlet end side of the fork insertion hole is directed backward. The projecting side of the corner formed by the reinforcing lateral rib and the upper rib for connecting the girder portion is formed into a curved surface having a cross-sectional arc shape, and the inner corner side of the corner portion is reinforced. Since the rib is formed, even if the tip of the fork that collides with the guide inclined rib bites into the guide inclined rib, it is formed between the reinforcing lateral rib and the upper rib for connecting the beam portion. corner Guided by the curved surface on the protruding corner side, it can be smoothly inserted into the fork insertion hole. As a result, even if the tip of the fork bites into the inclined rib for guide, the upper rib for connecting the girder perpendicular to the fork insertion direction In addition, even if the tip of the fork bites into the guide inclined rib or hits the lower end of the upper rib for connecting the spar, the reinforcing lateral rib and the upper rib for connecting the spar It is to be smoothly inserted into the fork insertion hole by being guided by the curved surface of the corner portion of the corner portion, and in this respect also, the upper rib for connecting the girder portion is not deformed or damaged, Furthermore, even if the tip of the fork bites into the guide inclined rib or a large impact force is applied to the guide inclined rib at the tip of the fork, the upper rib for connecting the girder portion may In addition to supporting the impact with the upper rib in the insertion direction, the upper rib for connecting the girder part is reinforced by the reinforcing lateral rib and the inner corner side reinforcing rib is formed on the inner corner side of the corner portion between the upper ribs in the insertion direction. Therefore, the deformation and breakage of the upper rib for connecting the girder part is strongly reinforced with the reinforcing horizontal rib and the inner corner side reinforcing rib on the inner corner side of the corner part to prevent the deformation and breakage of the upper rib for connecting the girder part. It can be prevented.
[0031]
In addition, in the invention described in claim 2, in addition to the effect of the invention described in claim 1, the fork is inserted as the spar connecting upper rib located on the inlet end side of the fork insertion hole goes upward. The lower edge of the fork insertion hole from the vicinity of the lower end of the upper rib for connecting the girder part located on the inlet end side of the fork insertion hole to the inlet end of the fork insertion hole on the surface The guide fork ribs are provided so that the upper part of the fork insertion hole is inclined upward toward the entrance end side of the fork insertion hole. The fork can be inserted into the fork insertion hole more smoothly by being guided by the inclined rib connecting upper rib even if it collides with the upper connecting rib. I hit the upper rib May not be inserted further in a state or can be deformed on rib girder connection, it is not likely to be damaged.
[0032]
In addition, in the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the end of the upper rib in the insertion direction is positioned on the inlet end side of the fork insertion hole. Since the guide inclined rib is formed by extending integrally in the direction of the inlet end of the fork insertion hole via the upper connecting rib, the impact when the tip of the fork hits the guide inclined rib in plan view It can be received by the straight upper rib in the insertion direction, and deformation and breakage of the connecting upper rib can be prevented.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole of a pallet according to the present invention.
FIG. 2 is a perspective view of a pallet according to the present invention.
FIG. 3 is a plan view of the same.
FIG. 4 is a bottom view of the above.
FIG. 5 is a front view of the above.
FIG. 6 is a side view of the above.
FIG. 7 is a bottom view of the same.
FIG. 8 is an enlarged front view of the inlet portion of the fork insertion hole.
FIG. 9 is an enlarged bottom view of the inlet portion of the fork insertion hole.
FIG. 10 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to another embodiment of the present invention.
FIG. 11 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to still another embodiment of the present invention.
FIG. 12 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to still another embodiment of the present invention.
FIG. 13 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to still another embodiment of the present invention.
FIG. 14 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to still another embodiment of the present invention.
FIG. 15 is an enlarged cross-sectional view of an inlet portion of a fork insertion hole according to still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front surface part 2 Back surface part 3 Girder part 4 Fork insertion hole 5 Pallet 8 Inlet 20 Guide inclination rib 21 Reinforcement horizontal rib 22a Curved surface 30 Inner corner side reinforcement rib

Claims

In a pallet in which a girder portion is disposed between the front surface portion and the back surface portion and a fork insertion hole is formed between adjacent girder portions, a plurality of girder portions constructed between the girder portions adjacent to the upper surface portion of the fork insertion hole And a plurality of rows of insertion direction upper ribs that are parallel to the direction of fork insertion into the fork insertion holes and intersect with the beam portion connection upper rib integrally. Of these, the upper rib for connecting the girder portion located on the inlet end side of the fork insertion hole is arranged at a position slightly rearward of the inlet end portion of the fork insertion hole on the surface portion, and the inlet end of the fork insertion hole on the surface portion An inclined guide rib is provided so that the lower edge of the upper end of the fork insertion hole faces upward from the upper end rib of the fork insertion hole toward the upper end rib of the fork insertion hole. On the inlet end side of the fork insertion hole A curved surface with a cross-section arc-shaped at the corner of the corner formed by the reinforcing lateral rib and the upper rib for connecting the spar. And an inner corner side reinforcing rib on the inner corner side of the corner portion between the upper ribs in the insertion direction.

The upper rib for connecting the beam portion located on the inlet end side of the fork insertion hole is inclined upward toward the inlet end side of the fork insertion hole as it goes upward, and is located on the inlet end side of the fork insertion hole. An inclined guide rib that is inclined upward so that the lower end edge of the upper link rib near the lower end of the girder connecting upper rib extends toward the inlet end of the fork insertion hole. The pallet according to claim 1, wherein the pallet is provided.

An end of the upper rib in the insertion direction is integrally extended in the direction of the inlet end of the fork insertion hole via a girder connecting upper rib located on the inlet end side of the fork insertion hole to form a guide inclined rib. The pallet according to claim 1 or 2, characterized by comprising: