JP4015804B2

JP4015804B2 - palette

Info

Publication number: JP4015804B2
Application number: JP2000315690A
Authority: JP
Inventors: 健二鈴木
Original assignee: Gifu Plastic Industry Co Ltd
Current assignee: Gifu Plastic Industry Co Ltd
Priority date: 2000-10-16
Filing date: 2000-10-16
Publication date: 2007-11-28
Anticipated expiration: 2020-10-16
Also published as: JP2002120839A

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たパレットが知られている。このパレットは裏面部のフォーク挿入孔に対応した部位を補強するために、フォーク挿入孔の両内側面部を構成する対向する桁部の対向側壁部の下端部に複数列の桁部連結用下リブを架設して裏面部のフォーク挿入孔に対応した部位の補強を行うとともに、隣接する桁部の連結を行って桁部の補強を行っていた。また、フォーク挿入孔へのフォークの挿入を容易にするため、フォーク挿入孔の入口両内側面部を構成する対向する桁部の対向側壁部の前部の間隔を外方程広くなるようにして上記入口の両内側面部を傾斜側壁部とすると共に、裏面部のフォーク挿入孔に対応した部位の入口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としていた。そして、上記複数列の桁部連結用下リブのうち入口側の桁部連結用下リブは入口下傾斜面部の後端部の下面部に設けた対向する両傾斜側壁部の後端部付近の下部間を連結するように架設してあった。
【０００３】
上記のような構成のパレットにおいて、フォークをフォーク挿入孔に挿入する際、フォークの先端が入口下傾斜面部に当たる場合が多いが、入口下傾斜面部の側端部付近にフォークの先端部が当たった場合、桁部連結用下リブにねじれが生じ、入口下傾斜面部の側端部付近に亀裂が発生したり、破損が生じたり、あるいは桁部連結用下リブの傾斜側壁部の後端部付近に無理な力が作用して桁部連結用下リブや桁部の側壁部の下端部が破損したりしやすいという問題があった。
【０００４】
【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、フォーク挿入孔へのフォークの挿入のガイドを行い、しかも、フォークが衝突してもフォーク挿入孔の入口に位置する桁部連結用下リブがねじれないようにでき、亀裂の発生や破損を防止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。
【０００５】
【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、表面部１と裏面部２の隅同士を連結する４個の隅の桁部３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個の中間の桁部３と、表面部１と裏面部２との中央部同士を連結する１個の中央部の桁部３とを備え、桁部３間にフォーク挿入孔４を井の字状に形成し且つ裏面部２のフォーク挿入孔４が交差する部位を開口した合成樹脂の一体成形の片面使用の四方差しパレット５において、表面部１の肉厚よりも裏面部２の肉厚を薄くし、上記裏面部２のフォーク挿入孔４に対応した部位の下面部に、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の対向側壁部の下端部に架設した複数列の桁部連結用下リブ７と、フォーク挿入方向と平行で且つ上記複数列の桁部連結用下リブ７と交差一体化した複数の挿入方向下リブ１５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とすると共に、裏面部２のフォーク挿入孔４に対応した部位の入口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、上記入口下傾斜面部１０の下面部に上記挿入方向下リブ１５の先端部を設け、入口下傾斜面部１０の下面部の両端にフォーク挿入孔４のフォーク挿入方向に略平行な補強リブ１２を形成し、この補強リブ１２の後端部を入口下傾斜面部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、入口下傾斜面部１０の隣接する挿入方向下リブ１５間及び補強リブ１２と挿入方向下リブ１５間に水抜き孔３０を設けて成ることを特徴とするものである。このようにフォーク挿入孔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とすると共に、裏面部２のフォーク挿入孔４に対応した部位の入口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を形成することで、フォーク挿入孔４にフォークを挿入する際、傾斜側壁部９、入口下傾斜面部１０、入口下隅傾斜面部１１の傾斜面により入口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のはもちろんのこと、入口下傾斜面部１０の側端部付近（つまり入口下隅傾斜面部１１付近）にフォークの先端が当たっても、入口下傾斜面部１０の下面部の両端に設けた補強リブ１２の後端部を入口下傾斜面部１０の下面部の後端部に設けた対向する両傾斜側壁部の後端部の下部間を連結する桁部連結用下リブ７に一体に連結してこの部分を補強リブ１２で補強してあるので、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、あるいは桁部連結用下リブ７や桁部３の傾斜側壁部９の下端部の破損が防止されるものである。
【０００６】
【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。
【０００７】
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、表面部１と裏面部２とが、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。
【０００８】
図８、図９に示すように、表面部１のフォーク挿入孔４の上部に対応した部位には、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の上端部間に架設した桁部連結用上リブ１３を設けると共に、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。
【０００９】
また、図８、図９に示すように、裏面部２のフォーク挿入孔４下部に対応した部位の下面部には、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の下端部間に架設した桁部連結用下リブ７と、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。
【００１０】
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っている。
【００１１】
また、裏面部２のフォーク挿入孔４に対応した部位の入口８部分は、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。なお、入口下傾斜面部１０には隣接する挿入方向下リブ１５間には水抜きと軽量化のために水抜き孔３０が設けてある。
【００１２】
上記のように、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とすると共に、裏面部２のフォーク挿入孔４に対応した部位の入口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、傾斜側壁部９、入口下傾斜面部１０、入口下隅傾斜面部１１の各傾斜面により入口８部分でスムーズにフォークをガイドしてフォーク挿入孔４に挿入することができるようになっている。
【００１３】
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。
【００１４】
また、図８に示すように、入口下傾斜面部１０の下面部の両端（つまり、入口下傾斜面部１０の下面部の両端で且つ入口下隅傾斜面部１１を連出した部分）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。
【００１５】
ここで、上記のように、入口下傾斜面部１０の両端部に入口下隅傾斜面部１１を設けることで、入口下隅傾斜面部１１により入口８へのフォークの挿入をガイドしてフォークの挿入が容易に行えるようになっているが、入口下傾斜面部１０の両端部に入口下隅傾斜面部１１を連出すると、図８に示す入口８の側端部に位置する挿入方向下リブ１５と桁部８の傾斜側壁部９の前端部との間の距離Ｍが入口下隅傾斜面部１１の分だけ長くなり、このため、入口下隅傾斜面部１１を含む傾斜側壁部９の側端部付近にフォークの先端が当たると、入口８側に位置する桁部連結用下リブ７にねじれ力が生じて、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、あるいは桁部連結用下リブ７や桁部３の対向側壁部９の下端部の破損するおそれがある。しかしながら、本発明においては上記のように、入口下傾斜面部１０の両端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。
【００１６】
【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、表面部と、裏面部と、表面部と裏面部の隅同士を連結する４個の隅の桁部と、表面部と裏面部との周囲の中間部同士を連結する４個の中間の桁部と、表面部と裏面部との中央部同士を連結する１個の中央部の桁部とを備え、桁部間にフォーク挿入孔を井の字状に形成し且つ裏面部のフォーク挿入孔が交差する部位を開口した合成樹脂の一体成形の片面使用の四方差しパレットにおいて、表面部の肉厚よりも裏面部の肉厚を薄くし、上記裏面部のフォーク挿入孔に対応した部位の下面部に、フォーク挿入孔の両内側面部を構成する対向する桁部の対向側壁部の下端部に架設した複数列の桁部連結用下リブと、フォーク挿入方向と平行で且つ上記複数列の桁部連結用下リブと交差一体化した複数の挿入方向下リブを設け、フォーク挿入孔の入口両内側面部を構成する対向する桁部の対向側壁部の前部の間隔を外方程広くなるようにして上記入口の両内側面部を傾斜側壁部とすると共に、裏面部のフォーク挿入孔に対応した部位の入口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とし、入口下傾斜面部の両端部を桁部の傾斜側壁部に至るまで面一に連出して傾斜側壁部と一体化した入口下隅傾斜面部を形成し、上記入口下傾斜面部の下面部に上記挿入方向下リブの先端部を設けてあるので、フォーク挿入孔にフォークを挿入する際、傾斜側壁部、下面部に挿入方向下リブの先端部が設けられた入口下傾斜面部、入口下隅傾斜面部の各傾斜面により入口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に挿入することができるものであり、特に、入口下隅傾斜面部を設けることでフォークの挿入がスムーズとなるものであり、しかも、このように、入口下傾斜面部の両端部に入口下隅傾斜面部を設けるといえども、本発明においては、入口下傾斜面部の下面部の両端にフォーク挿入孔のフォーク挿入方向に略平行な補強リブを形成し、この補強リブの後端部を入口下傾斜面部の後端部の下面部に設けた対向する両傾斜側壁部の後端部の下部間を連結する桁部連結用下リブに一体に連結してあるので、入口下傾斜面部の側端部付近にフォークの先端が当たっても、この部分の下面部にフォーク挿入方向に略平行な補強リブが設けてあることで、該下面部に設けた補強リブにより補強されて、補強リブにより入口側に位置する桁部連結用下リブがねじれるのを防止でき、この結果、入口下傾斜面部の側端部付近に亀裂が発生したり、破損が生じたり、桁部連結用下リブ及び傾斜側壁部の破損が防止できるものである。また、入口下傾斜面部の隣接する挿入方向下リブ間及び補強リブと挿入方向下リブ間に水抜き孔を設けてあるので、軽量化を図ることができる。
【図面の簡単な説明】
【図１】本発明のパレットの斜視図である。
【図２】同上の底面図である。
【図３】同上の平面図である。
【図４】同上の正面図である。
【図５】同上の側面図である。
【図６】同上の水平断面図である。
【図７】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８】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９】同上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
６対向側壁部
７桁部連結用下リブ
８入口
９傾斜側壁部
１０入口下傾斜面部
１１入口下隅傾斜面部
１２補強リブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pallet.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a pallet in which a girder portion is disposed between a front surface portion and a back surface portion and a fork insertion hole is formed between adjacent girder portions. In order to reinforce the part corresponding to the fork insertion hole on the back surface, this pallet has a plurality of rows of girder connecting lower ribs at the lower ends of the opposite side wall parts of the opposite girder parts constituting both inner side surfaces of the fork insertion hole. In addition to reinforcing the part corresponding to the fork insertion hole on the back surface , the adjacent girder part is connected to reinforce the girder part. Further, in order to facilitate the insertion of the fork into the fork insertion hole, the entrance is made such that the distance between the front portions of the opposing side wall portions of the opposite girder portions constituting the inner side surfaces of the entrance of the fork insertion hole is increased outward. Both the inner side surface portions are inclined side wall portions, and the end portion on the inlet side of the portion corresponding to the fork insertion hole on the back surface portion is an inlet lower inclined surface portion that is inclined downward so as to be downward outward. Of the plurality of rows of spar-connecting lower ribs, the spar-connecting lower rib on the inlet side is located near the rear end portions of the opposite inclined side wall portions provided on the lower surface portion of the rear end portion of the inlet lower inclined surface portion. It was erected to connect the lower part.
[0003]
In the pallet configured as described above, when the fork is inserted into the fork insertion hole, the tip of the fork often hits the lower inclined surface portion of the inlet, but the front end of the fork hits the side end portion of the lower inclined surface portion of the inlet. In this case, the lower rib for connecting the girder portion is twisted, cracks are generated near the side end portion of the lower inclined surface portion of the entrance, damage is caused, or the vicinity of the rear end portion of the inclined side wall portion of the lower rib for connecting the girder portion There is a problem that the lower ribs for connecting the spar and the side walls of the spar are easily damaged due to excessive force.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and guides the insertion of the fork into the fork insertion hole, and even when the fork collides, the lower rib for connecting the girder part located at the entrance of the fork insertion hole It is an object of the present invention to provide a pallet that can prevent twisting and prevent the occurrence of cracks and breakage.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a pallet according to the present invention includes a front surface portion 1, a back surface portion 2, four corner beams 3 connecting the corners of the front surface portion 1 and the back surface portion 2, and a front surface portion 1. And four intermediate girder parts 3 that connect the middle parts around the back surface part 2 and one central girder part 3 that connects the center parts of the front surface part 1 and the back surface part 2 to each other. In the four-sided pallet 5 using a single-sided synthetic resin, in which a fork insertion hole 4 is formed in the shape of a well between the girders 3 and a portion where the fork insertion hole 4 of the back surface 2 intersects is opened, The thickness of the back surface portion 2 is made thinner than the thickness of the front surface portion 1, and the opposite girder constituting both inner side surface portions of the fork insertion hole 4 is formed on the lower surface portion of the back surface portion 2 corresponding to the fork insertion hole 4. a plurality of rows of the girder connecting under rib 7 which is laid in the lower end portion of the opposite side wall parts 3, and parallel to the fork insertion direction A serial plurality of insertion direction under the ribs 15 intersecting integrated with a plurality of rows of the girder connecting under rib 7 provided, the column portions 3 facing constituting the inlet 8 both inner side surface portion of the fork insertion holes 4 of the opposing side wall portions 6 Both the inner side surfaces of the inlet 8 are inclined side wall portions 9 so that the distance between the front portions becomes wider outward, and the end portion on the inlet 8 side of the portion corresponding to the fork insertion hole 4 of the back surface portion 2 is extended outward. The inlet lower inclined surface portion 10 is inclined downward so as to be below, and both ends of the inlet lower inclined surface portion 10 are flush with the inclined side wall portion 9 of the girder 3 so as to be integrated with the inclined side wall portion 9. The lower corner inclined surface portion 11 is formed, the tip end portion of the insertion direction lower rib 15 is provided on the lower surface portion of the inlet lower inclined surface portion 10, and the fork insertion hole 4 extends in the fork insertion direction at both ends of the lower surface portion of the inlet lower inclined surface portion 10. A substantially parallel reinforcing rib 12 is formed, and the reinforcing rib 12 The end portion is integrally connected to the lower rib 7 for connecting the spar portion connecting the lower portions of the rear end portions of the opposing inclined side wall portions provided on the lower surface portion of the rear end portion of the lower inclined surface portion 10 of the inlet, A drainage hole 30 is provided between the adjacent insertion direction lower ribs 15 of the surface portion 10 and between the reinforcing rib 12 and the insertion direction lower rib 15. In this way, both the inner side surfaces of the inlet 8 are inclined side wall portions so that the distance between the front portions of the opposite side wall portions 6 of the opposite girder portions 3 constituting the inner side surface portions of the inlet 8 of the fork insertion hole 4 becomes wider outward. 9, and the end portion on the inlet 8 side of the portion corresponding to the fork insertion hole 4 of the back surface portion 2 is an inlet lower inclined surface portion 10 that is inclined downward so as to be outwardly lowered, and both end portions of the inlet lower inclined surface portion 10. When the fork is inserted into the fork insertion hole 4, the inclined lower side wall is formed so as to be flush with the inclined side wall 9 of the girder 3 and is formed integrally with the inclined side wall 9. Of course, the fork can be inserted into the fork insertion hole 4 by smoothly guiding at the inlet 8 portion by the inclined surfaces of the portion 9, the inlet lower inclined surface portion 10, and the inlet lower corner inclined surface portion 11. Near the side edge of Even the corner near the inclined surface 11) hit the tip of the fork, provided with a rear end portion of the reinforcing rib 12 provided at both ends of the lower surface of the inlet under the inclined surface portion 10 to the rear end portion of the lower surface of the inlet under the inclined surface portion 10 Further, the lower ribs 7 for connecting the spar portions that connect the lower portions of the rear end portions of the opposite inclined side wall portions are integrally connected to each other, and this portion is reinforced by the reinforcing ribs 12. The lower rib 7 for connecting the spar portion located at the side can be prevented from being twisted, cracking or breakage occurs near the side end portion of the lower inclined surface portion 10 of the entrance, or the lower rib 7 for connecting the spar portion or the spar Damage to the lower end portion of the inclined side wall portion 9 of the portion 3 is prevented.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0007]
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 3 is constituted by a cylindrical girder 3a, and the front surface portion 1 and the back surface portion 2 connect the corner portions of the girder surface surface portion 1 and the back surface portion 2 4. The cylindrical girders 3a at the corners, the four middle cylindrical girders 3a that connect the middle portions around the front surface portion 1 and the back surface portion 2, and the center portions of the front surface portion 1 and the back surface portion 2 It is connected by a central cylindrical girder 3a to be connected. 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 is formed in the shape of a well between the cylindrical girders 3a is configured .
[0008]
As shown in FIGS. 8 and 9, the upper end of the opposite side wall portion 6 of the opposite girder portion 3 constituting both inner side surface portions of the fork insertion hole 4 is located at a portion corresponding to the upper portion of the fork insertion hole 4 of the surface portion 1. An upper rib 13 for connecting the spar portion erected between the portions is provided, and an upper rib 14 in the insertion direction is provided parallel to the fork insertion direction of the fork insertion hole 4 and intersecting and integrated with the upper rib 13 for connecting the spar portion. .
[0009]
Further, as shown in FIGS. 8 and 9, on the lower surface portion of the portion corresponding to the lower portion of the fork insertion hole 4 of the back surface portion 2, the opposite side walls of the opposite girder portions 3 constituting both inner side surfaces of the fork insertion hole 4 are provided. A lower rib 7 for connecting the spar portion between the lower ends of the portion 6 and a lower rib 15 in the insertion direction parallel to the fork insertion direction of the fork insertion hole 4 and intersecting and integrated with the lower rib 7 for connecting the spar portion are provided. It is.
[0010]
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 interval between the front portions of the opposing side wall 6 becomes wider outward. Yes.
[0011]
Moreover, the inlet 8 part of the site | part corresponding to the fork insertion hole 4 of the back surface part 2 is the entrance lower inclined surface part 10 inclined down so that it might become the outward 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. In addition, a drain hole 30 is provided between the adjacent lower ribs 15 in the insertion direction in the lower inclined surface portion 10 for drainage and weight reduction.
[0012]
As described above, both the inner side surfaces of the inlet 8 are inclined so that the distance between the front portions of the opposite side wall portions 6 of the opposite girder portions 3 constituting the inner side surfaces of the inlet 8 of the fork insertion hole 4 becomes wider outward. In addition to the side wall portion 9, the end portion on the inlet 8 side of the portion corresponding to the fork insertion hole 4 of the back surface portion 2 is an inlet lower inclined surface portion 10 that is inclined downward so as to be outwardly downward. When the fork is inserted into the fork insertion hole 4, the both end portions are flush with each other up to the inclined side wall portion 9 of the girder 3 to form the inlet lower corner inclined surface portion 11 integrated with the inclined side wall portion 9. The fork can be smoothly guided and inserted into the fork insertion hole 4 at the inlet 8 portion by the inclined surfaces of the inclined side wall portion 9, the inlet lower inclined surface portion 10, and the inlet lower corner inclined surface portion 11.
[0013]
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 lower inclined surface portion 10 of the entrance. Here, the lower rib 7 for connecting the spar portion provided on the lower surface portion of the rear end portion of the lower inclined surface portion 10 is integrally connected to the spar portion 3 in the vicinity of the rear end portion of the lower inclined surface portion 10 of the inlet portion 3. In addition, the lower rib 7 for connecting the spar 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 spar portion 3 at the front end portion of the lower inclined surface portion 10 of the entrance portion of the spar 3.
[0014]
Further, as shown in FIG. 8, fork insertion holes are provided at both ends of the lower surface portion of the inlet lower inclined surface portion 10 (that is, at both ends of the lower surface portion of the inlet lower inclined surface portion 10 and the portion where the inlet lower corner inclined surface portion 11 is continuously extended). 4, reinforcing ribs 12 substantially parallel to the fork insertion direction are formed, and the rear end portions of the reinforcing ribs 12 are formed on the lower surface portions of the rear end portions of the inlet lower inclined surface portions 10. Opposite inclined side walls which are integrally connected to the lower rib 7 for connecting the girder portions connecting the lower portions of the rear end portions, and the front end portions of the reinforcing ribs 12 are provided on the lower surface portion of the front end portion of the inlet lower inclined surface portion 10 It is integrally connected to the lower rib 7 for connecting the spar portion that connects the lower portions of the front end portion of the portion 9.
[0015]
Here, as described above, by providing the inlet lower corner inclined surface portions 11 at both ends of the inlet lower inclined surface portion 10, the insertion of the fork into the inlet 8 is guided by the inlet lower corner inclined surface portion 11 so that the fork can be easily inserted. As shown in FIG. 8, when the inlet lower corner inclined surface portion 11 is continuously provided at both ends of the inlet lower inclined surface portion 10, the insertion direction lower rib 15 and the girder portion 8 located at the side end portion of the inlet 8 shown in FIG. The distance M between the front end portion of the inclined side wall portion 9 is increased by the amount corresponding to the entrance lower corner inclined surface portion 11, and for this reason, the tip of the fork hits the side end portion of the inclined side wall portion 9 including the inlet lower corner inclined surface portion 11. As a result, a torsional force is generated in the lower rib 7 for connecting the spar portion located on the inlet 8 side, and cracks or breakage occurs near the side end of the lower inclined surface portion 10 of the inlet. Damage to the lower end of the opposite side wall 9 of the rib 7 or girder 3 There is Ruosore. However, in the present invention, as described above, the reinforcing ribs 12 substantially parallel to the fork insertion direction of the fork insertion hole 4 are formed on the lower surface portions at both ends of the inlet lower inclined surface portion 10, so that the inclined side wall portion 9. Even if the tip of the fork hits in the vicinity of the side end of the fork, this portion is reinforced by the reinforcing rib 12 substantially parallel to the fork insertion direction, and the lower rib 7 for connecting the spar portion located on the inlet 8 side is formed by the reinforcing rib 12. It can prevent twisting. 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 .
[0016]
【The invention's effect】
As described above, in the first aspect of the present invention, the front surface portion, the back surface portion, the four corner beams connecting the corners of the front surface portion and the back surface portion, the front surface portion and the back surface 4 middle girder parts that connect the middle parts around the part and one central girder part that connects the center parts of the front and back parts, and a fork between the girder parts In a four-sided pallet that uses a single-sided synthetic resin that has an insertion hole formed in the shape of a well and that is open at the portion where the fork insertion hole on the back side intersects, the thickness of the back side is greater than the thickness of the front side And connecting multiple rows of girder portions to the lower surface of the opposite side wall portion of the opposite girder portion constituting both inner side surface portions of the fork insertion hole on the lower surface portion of the portion corresponding to the fork insertion hole of the back surface portion and under the rib use, it intersects integral with fork insertion direction and parallel to and above a plurality of rows of column portions under a connecting rib Provided the insertion direction under the ribs having inclined side walls of both inner side surface portion of the front the inlet set to be wider as outside the interval of the opposed side wall portions of the column portions facing constituting the inlet both inner surface of the fork insertion holes In addition, the end portion on the inlet side of the portion corresponding to the fork insertion hole on the rear surface portion is an inlet lower inclined surface portion inclined downward so as to be outwardly downward, and both end portions of the lower inlet inclined surface portion are inclined on the girder portion. Since the inlet lower corner inclined surface portion that is flush with the side wall portion and is integrated with the inclined sidewall portion is formed, and the tip end portion of the lower rib in the insertion direction is provided on the lower surface portion of the inlet lower inclined surface portion, the fork When the fork is inserted into the insertion hole, the fork is smoothly guided by the inclined portion of the inclined side wall portion, the lower surface of the inlet surface provided with the tip of the lower rib in the insertion direction on the lower surface portion, and the inclined surface of the lower surface of the inlet corner. Insert into the fork insertion hole In particular, it is possible to smoothly insert the fork by providing the inlet lower corner inclined surface portion, and it can be said that the inlet lower corner inclined surface portions are provided at both ends of the inlet lower inclined surface portion as described above. In the present invention, reinforcing ribs substantially parallel to the fork insertion direction of the fork insertion hole are formed at both ends of the lower surface portion of the inlet lower inclined surface portion, and the rear end portion of the reinforcing rib is used as the rear end portion of the inlet lower inclined surface portion. The fork tip is located near the side end of the lower inclined surface portion of the entrance because it is integrally connected to the lower rib for connecting the girder portion that connects the lower portions of the rear end portions of the opposite inclined side wall portions provided on the lower surface portion of the inlet. Even if it hits, the reinforcement rib substantially parallel to the fork insertion direction is provided on the lower surface portion of this portion, so that it is reinforced by the reinforcement rib provided on the lower surface portion and is located on the inlet side by the reinforcement rib. The connecting lower rib is twisted As a result, it is possible to prevent cracks or breakage in the vicinity of the side end portion of the lower inclined surface portion of the entrance, or breakage of the lower rib for connecting the girder portion and the inclined side wall portion. Further, since water drainage holes are provided between adjacent lower ribs in the insertion direction and between the reinforcing ribs and lower ribs in the insertion direction, the weight can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a pallet according to the present invention.
FIG. 2 is a bottom view of the above.
FIG. 3 is a plan view of the same.
FIG. 4 is a front view of the above.
FIG. 5 is a side view of the above.
FIG. 6 is a horizontal sectional view of the above.
FIG. 7 is an enlarged front view of the inlet portion of the fork insertion hole.
FIG. 8 is an enlarged bottom view of the inlet portion of the fork insertion hole.
FIG. 9 is an enlarged cross-sectional view of the inlet portion of the fork insertion hole.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front surface part 2 Back surface part 3 Girder part 4 Fork insertion hole 5 Pallet 6 Opposite side wall part 7 Lower rib for girder part connection 8 Inlet 9 Inclined side wall part 10 Inlet lower inclined surface part 11 Inlet lower corner inclined surface part 12 Reinforcement rib

Claims

The front surface, the back surface, the four corner girders that connect the corners of the front and back surfaces, and the four intermediate girders that connect the middle portions around the front and back surfaces And a central girder for connecting the central portions of the front surface portion and the back surface portion, and a fork insertion hole is formed in the shape of a well between the girder portions, and the fork insertion hole on the back surface portion In a four-sided pallet that uses a single-sided synthetic resin that has a single-sided synthetic resin opening at the intersecting portion, the thickness of the back surface is made thinner than the thickness of the front surface, and the lower surface of the portion corresponding to the fork insertion hole in the back surface A plurality of rows of girder connecting lower ribs constructed at the lower end of the opposing side wall portion of the opposite girder portion constituting both inner side surfaces of the fork insertion hole, and the plurality of rows of girder portions parallel to the fork insertion direction. a plurality of insertion direction under the ribs intersecting integrated with bottom for connecting ribs provided, the fork insertion hole entry Car Sites front spacing opposite side wall of the girder portion facing constituting the side surface portion so as to become wider as the outside with an inclined side wall portions of both the inner surface of the inlet, corresponding to the fork inserting hole of the bottom The end portion on the inlet side of the inlet is a lower inclined surface portion that is inclined downward so as to be outwardly downward, and both end portions of the lower inclined surface portion of the inlet are flush with each other until reaching the inclined side wall portion of the girder, and the inclined side wall portion. The inlet lower corner inclined surface portion is formed, the lower end portion of the inlet lower inclined surface portion is provided with the tip end of the insertion direction lower rib, and the fork insertion hole extends in the fork insertion direction at both ends of the lower surface portion of the inlet lower inclined surface portion. Girder connection that forms substantially parallel reinforcing ribs and connects the lower end portions of the opposite inclined side wall portions that are provided on the lower surface portion of the rear end portion of the lower inclined surface portion of the inlet rib. Adjacent insertion direction of the lower inclined surface part of the inlet connected integrally to the lower rib Pallet characterized by comprising providing a drain hole between the ribs and between the reinforcing ribs to the insertion direction under the ribs.