JP3978026B2

JP3978026B2 - Plastic pallet

Info

Publication number: JP3978026B2
Application number: JP2001373753A
Authority: JP
Inventors: 智博長屋
Original assignee: Gifu Plastic Industry Co Ltd
Current assignee: Gifu Plastic Industry Co Ltd
Priority date: 2001-12-07
Filing date: 2001-12-07
Publication date: 2007-09-19
Anticipated expiration: 2021-12-07
Also published as: JP2003170938A

Description

【０００１】
【発明の属する技術分野】
本発明は、合成樹脂製の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の隅部同士を連結する隅の筒状桁と、表面部と裏面部との周囲の中間部同士を連結する中間の筒状桁と、表面部と裏面部の中央部同士を連結する中央部の筒状桁により連結され、且つ筒状桁間にフォーク挿入孔が井の字状に形成され、且つ表面部が荷物の載置面となった片面使用の合成樹脂製四方差しパレットが知られている。このパレットは、隅の筒状桁と中間の筒状桁との間のフォーク挿入孔部分においては、隅の筒状桁と中間の筒状桁との間に複数の上桟、複数の下桟を架設してあった。
【０００３】
ところで、パレットは荷物の載置面である表面部に荷物を載置した状態でフォーク挿入孔にフォークを挿入し、フォークをフォーク挿入孔の上桟の下面に当てた状態で持ち上げるられるものであり、このようにフォークをフォーク挿入孔に挿入してパレットを持ち上げた場合、載置物が重量物であるとパレットが変形しやすいという問題がある。
【０００４】
そこで、パレットの強度を向上させて重量物の載置物を載置しても変形しないようにするには、各部の肉厚を厚くすることが考えられるが、単に各部の肉厚を厚くするものにおいては、合成樹脂の使用量が増大し、生産コストがアップし、また、重量が重くなるという問題がある。
【０００５】
【発明が解決しようとする課題】
本発明は上記した従来例の問題点に鑑みてなされたものであり、樹脂の使用量をできるだけ抑制し且つ合理的な構成で強度を向上させ、載置物を載置した状態でフォーク挿入孔にフォークを挿入して持ち上げてもパレットが変形し難い構成の合成樹脂製のパレットを提供することを課題とするものである。
【０００６】
【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合成樹脂製のパレットは、表面部１と裏面部２の隅部同士を連結する隅の筒状桁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中間の筒状桁３ｂと、表面部１と裏面部２の中央部同士を連結する中央部の筒状桁３ｃにより連結され、且つ筒状桁３間にフォーク挿入孔４が井の字状に形成され、且つ表面部１が荷物の載置面となった合成樹脂により一体に成形された片面使用の合成樹脂製四方差しパレットであって、隅の筒状桁３ａ内を表裏面部１、２にわたる隅区画壁３０により区画し、中間の筒状桁３ｂ内を表裏面部１、２にわたる中間区画壁３１により区画し、隅の筒状桁３ａと中間の筒状桁３ｂとの間のフォーク挿入孔４の上において隅の筒状桁３ａと中間の筒状桁３ｂとの間に複数の上桟１２を架設し、上記複数の上桟１２のうち一つの上桟１２の各両端部の筒状桁３への接続部分を隅区画壁３０の隅の筒状桁３ａとの接続部分及び中間区画壁３１の中間の筒状桁３ｂとの接続部分に一致させ、隅の筒状桁３ａと中間の筒状桁３ｂとの間に架設した複数の上桟１２のうち両端部が上記隅区画壁３０の隅の筒状桁３ａとの接続部分と中間区画壁３１の中間の筒状桁３ｂとの接続部分に一致している上桟１２を隅の筒状桁３ａと中間の筒状桁３ｂとの間を連結する他の上桟１２よりも厚みが厚い補強上桟１２ａとし、上記中間区画壁３１が平面視でパレット６の当該中間区画壁３１の存在する辺と平行となっていて、中間区画壁３１とこれに連続する両側の補強上桟１２ａとが平面視で一直線状となり、且つ、上記隅区画壁３０が平面視でＬ状となっていてＬ状の各辺がパレットの隅部において直角に隣接する２辺に対して平行となっており、平面視でパレットの４隅に位置する隅の筒状桁３ａに設けたＬ状をした隅区画壁３０と、４つの中間の筒状桁３ｂに設けた中間区画壁３１と、隣接する隅の筒状桁３ａと中間の筒状桁３ｂとを連結する補強上桟１２とで四角環状をした環状補強部３２を構成し、上記平面視Ｌ状をした隅区画壁３０の外側の角部と、これと対向する隅の筒状桁３ａの外側の角部との間に第２の隅区画壁３３を一体に架設して成ることを特徴とするものである。
【０００７】
このような構成とすることで、隅の筒状桁３ａを隅区画壁３０により区画し且つ中間の筒状桁３ｂを中間区画壁３１により区画して隅の筒状桁３ａ及び中間の筒状桁３ｂを補強できるのみならず、この隅の筒状桁３ａを隅区画壁３０を補強する隅区画壁３０及び中間の筒状桁３ｂを補強する中間区画壁３１と一体に連続するように上桟１２が架設してあることで、フォーク挿入孔４におけるフォークが当たる表面部１の強度を補強でき、しかも、この両端部が上記隅区画壁３０の隅の筒状桁３ａとの接続部分と中間区画壁３１の中間の筒状桁３ｂとの接続部分に一致して連続一体化している上桟１２を隅の筒状桁３ａと中間の筒状桁３ｂとの間を連結する他の上桟１２よりも厚みが厚い補強上桟１２ａとしてあるので、厚みを厚くする部分を最小限に抑えながら効果的に表面部１のフォーク挿入方向と直交する方向の補強ができるものであり、特に、本発明にあっては、中間区画壁３１とこれに連続する両側の補強上桟１２ａとが平面視で一直線状となり、表面部１のフォーク挿入方向と直交する方向の補強ができ、また、平面視Ｌ状をした隅区画壁３０、中間区画壁３１、厚肉の補強上桟１２、下桟１５が四角環状に連続した環状補強部３２によりパレット６の表面部１ひいては全体を補強できるものであり、更に、平面視Ｌ状をした隅区画壁３０の外側の角部と、これと対向する隅の筒状桁３ａの外側の角部との間に第２の隅区画壁３３を一体に架設してあるので、上記四角環状に連続した環状補強部３２の角部である平面視Ｌ状をした隅区画壁３０の補強を第２の隅区画壁３３により行うことができる。
【００１１】
【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。
【００１２】
添付図面には本発明のパレット６の一実施形態が示してある。なお、図１には後述の環状補強部３２、筒状桁３、十字状補強部３５を破線で表示したパレット６の平面図である
パレット６は合成樹脂によって一体に射出成形してあり、表面部１と裏面部２とが複数個の筒状桁３により一体に連結してある。すなわち、図１に示すように、表面部１と裏面部２とは、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３ｂ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３ｃ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３ｂと、１個の中央部の筒状桁３ｃとにより一体に連結することで、上記の筒状桁３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６を構成している。また、図３、図６に示すように、パレット６には裏面部２の井の字状をしたフォーク挿入孔４の交差する部分に下開口部５が形成してある。本発明におけるパレット６は表面部１が載置面となった片面使用のパレットである。
【００１３】
図２に示すように、表面部１の中間部の筒状桁３と中央部の筒状桁３ｃとの間には複数の桟１０が形成してあり、また、表面部１のフォーク挿入孔４が縦横に交差している部分の上方に位置する部位（つまり表面部１の下開口部５の真上の部分）には複数の桟１１が形成してある。また、表面部１の隅部の筒状桁３と中間部の筒状桁３との間には複数の桟１２が形成してある。
【００１４】
図３に示すように、裏面部２の中間部の筒状桁３と中央部の筒状桁３ｃとの間には表面部１の桟１０と上下に重なり合わないように複数の桟１３が形成してあり、この桟１３は図６に示すように上面側（つまりフォーク挿入孔４に面する側）の下開口部５側の両端部が傾斜部７となり、両傾斜部７の上端間が水平部１４となっている。裏面部２の隅部の筒状桁３と中間部の筒状桁３との間には複数の桟１５が形成してあり、この桟１５は上面側（つまりフォーク挿入孔４に面する側）の下開口部５側端部及びフォーク挿入側端部がそれぞれ傾斜部７となり、両傾斜部７の上端間が水平部１４となっている。
【００１５】
したがって、裏面部２の上面にはフォーク挿入孔４の入口部分にそれぞれ傾斜部７が形成してあると共に、裏面部２に形成された４つの下開口部５の４辺に沿ってそれぞれ傾斜部７が形成してある。
【００１６】
ここで、表面部１における隅部の筒状桁３と中間部の筒状桁３を連結する部分及び中間部の筒状桁３と中央部の筒状桁３ｃを連結する部分の上記裏面部２の傾斜部７の上方位置に対応した部位に型抜き用の細長開口部８を形成してある。
【００１７】
図１、図８に示すように、各隅の筒状桁３ａは内部を隅区画壁３０により区画してあり、隅区画壁３０は上下端が表裏面部１、２に至る縦壁により構成してある。このように隅の筒状桁３ａ内を隅区画壁３０により区画し且つ隅区画壁３０を隅の筒状桁３ａと一体化すること隅の筒状桁３ａの強度を向上させている。隅区画壁３０は平面視でＬ状をしており、この平面視Ｌ状の各辺がパレット６の隅部において直角に隣接する２辺に対して平行となっていて平面視Ｌ状の隅区画壁３０の両端部が隅の筒状桁３ａの両側のフォーク挿入孔４に面する壁部に一体に接続してある。この平面視Ｌ状をした隅区画壁３０の外側の角部と、これと対向する隅の筒状桁３ａの外側の角部との間に第２の隅区画壁３３が一体に架設してあり、この第２の隅区画壁３３は上下端が表裏面部１、２に至る縦壁により構成してあり、第２の隅区画壁３３で区画することで隅の筒状桁３ａ内を更に細区画してあって、これによりいっそう隅の筒状桁３ａの強度を向上させ、更に、平面視Ｌ状をした隅区画壁３０の補強も行っている。
【００１８】
また、図１、図８に示すように、各中間の筒状桁３ｂは内部を中間区画壁３１により区画してあり、中間区画壁３１は上下端が表裏面部１、２に至る縦壁により構成してある。このように中間の筒状桁３ｂ内を中間区画壁３１により区画し且つ中間区画壁３１を中間の筒状桁３ｂと一体化することで中間の筒状桁３ｂの強度を向上させている。この中間区画壁３１は平面視でパレット６の当該中間区画壁３１の存在する辺と平行となっていて中間区画壁３１の両端部が中間の筒状桁３ｂの両側のフォーク挿入孔４に面する壁部に一体に接続してある。また、中間の筒状桁３ｂには上記中間区画壁３１の中央部分で直交する第２の中間区画壁３４が設けてあり、第２の中間区画壁３４は上下端が表裏面部１、２に至る縦壁により構成してあり、この第２の中間区画壁３４は両端部が中間の筒状桁３ｂの両側のフォーク挿入孔４に面する壁部と直交する壁部に一体に接続してあると共に中間区画壁３１の中央部分と中間区画壁３１の中央部分とが一体に接続してある。このように第２の中間区画壁３４で区画することで中間の筒状桁３ｂ内を更に細区画してあって、これによりいっそう中間の筒状桁３ｂの強度を向上させ、更に、中間区画壁３１の補強も行っている。
【００１９】
隅の筒状桁３ａと中間の筒状桁３ｂとの間のフォーク挿入孔４の上下において隅の筒状桁３ａと中間の筒状桁３ｂとの間に複数の上桟１２と複数の下桟１５が架設してある。
【００２０】
そして、上記複数の上桟１２のうち一つの上桟１２の各両端部の筒状桁３への接続部分が隅区画壁３０の隅の筒状桁３ａとの接続部分及び中間区画壁３１の中間の筒状桁３ｂとの接続部分に一致している。隅の筒状桁３ａと中間の筒状桁３ｂとの間に架設した複数の上桟１２のうち両端部が上記隅区画壁３０の隅の筒状桁３ａとの接続部分と中間区画壁３１の中間の筒状桁３ｂとの接続部分に一致している上桟１２を隅の筒状桁３ａと中間の筒状桁３ｂとの間を連結する他の上桟１２よりも厚みが厚い補強上桟１２ａとなっている。ここで、一例を挙げると、図９において複数の上桟１２のうち補強上桟１２ａの上部の厚みＴ１が３ｍｍ、下部の厚みＴ２が４．２ｍｍで、他の上桟１２の上部の厚みｔ１が２．５ｍｍ、下部の厚みｔ２が３．７ｍｍである。
【００２１】
上記のように、パレット６の４隅の筒状桁３ａ内を区画する平面視Ｌ状の隅区画壁３０と、パレット６の４辺の各中間部分に設けた中間の筒状桁３ｂ内を区画する各辺に平行な中間区画壁３１と、隣合う隅の筒状桁３ａと中間の筒状桁３ｂ間に架設されて両端部が上記隅区画壁３０及び中間区画壁３１に一体に連続する補強上桟１２ａと下桟１５とで、平面視で四角環状をした環状補強部３２が構成してある。
【００２２】
上記平面視四角環状をした環状補強部３２は図１に示すように、パレット６の各辺に沿って平面視で直線状をした中間区画壁３１と、これに連続する両側の補強上桟１２ａ及び下桟１５と、これに連続する両側の平面視Ｌ状の隅区画壁３０の各一片とがそれぞれ平面視で一直線になり、これを一辺とする４つの辺を各隅のＬ状の隅区画壁３０のコーナ部分で一体に連続した形状をしており、パレット６全体を補強する芯材となっている。そして、平面視四角環状をした環状補強部３２の４辺はいずれも一直線状となっていることで、４方差しのフォーク挿入孔４の各挿入方向に対して直交する方向の補強ができ、特に、表面部１においてはフォーク挿入孔４部分において厚みの厚い補強上桟１２ａを隅区画壁３０、中間区画壁３１に直線状に一連に連続しているので、表面部１のフォーク挿入方向と直交する方向の補強ができることになる。
【００２３】
図１に示すように、パレット６の上記平面視四角環状をした環状補強部３２内には更に十字状補強部３５が設けてあって、環状補強部３２内を４つに区画してある。
【００２４】
十字状補強部３５は、中央部の筒状桁３ｃ内に設けられて平面視十字状をした中央区画壁３６と、中央部の筒状桁３ｃの十字状区画壁３６と中間の筒状桁３ｂの第２の中間区画壁３４とを接続する下連結桟１３ａとで構成してあり、十字状区画壁３６の十字状の各端部の中央部の筒状桁３ｃとの接続部と下連結桟１３ａの中央部の筒状桁３ｃとの接続部とが平面視で一致し、また、第２の中間区画壁３４の一端部の中間の筒状桁３ｂとの接続部と下連結桟１３ａの中間の筒状桁３ｂとの接続部とが平面視で一致している。上記十字状区画壁３６は上下端部が上裏面部１、２に至る縦壁により構成してあり、中央部の筒状桁３ｃ内部を十字状区壁３６で区画することで、中央部の筒状桁３ｃの補強をおこなっている。また、パレット６の平面視四角環状をした環状補強部３２内を更に十字状補強部３５で区画し且つ十字状補強部３５の各端部を平面視四角環状をした環状補強部３２に一体に接続することで、平面視四角形状のパレット６が平面視田字状に補強され、４方差しパレット６全体の補強をおこなっている。
【００２５】
【発明の効果】
上記の請求項１記載の本発明にあっては、合成樹脂により一体に成形された片面使用の合成樹脂製四方差しパレットにおいて、隅の筒状桁内を表裏面部にわたる隅区画壁により区画し、中間の筒状桁内を表裏面部にわたる中間区画壁により区画してあるので、隅の筒状桁を隅区画壁により区画し且つ中間の筒状桁を中間区画壁により区画して隅の筒状桁及び中間の筒状桁を補強できるものであり、しかもこの隅の筒状桁と中間の筒状桁との間のフォーク挿入孔の上において隅の筒状桁と中間の筒状桁との間に複数の上桟を架設し、上記複数の上桟のうち一つの上桟の両端部の筒状桁への接続部分を隅区画壁の隅の筒状桁との接続部分及び中間区画壁の中間の筒状桁との接続部分に一致させ、隅の筒状桁と中間の筒状桁との間に架設した複数の上桟のうち両端部が上記隅区画壁の隅の筒状桁との接続部分と中間区画壁の中間の筒状桁との接続部分に一致している上桟を隅の筒状桁と中間の筒状桁との間を連結する他の上桟よりも厚みが厚い補強上桟としてあるので、厚みを厚くする部分を最小限に抑えながら効果的に表面部のフォーク挿入方向と直交する方向の補強ができ、特に、中間区画壁が平面視でパレットの当該中間区画壁の存在する辺と平行となっていて、中間区画壁とこれに連続する両側の補強上桟とが平面視で一直線状となっているので、中間区画壁とこれに連続する両側の補強上桟とが平面視で一直線状となり、合理的な構成で表面部のフォーク挿入方向と直交する方向の補強ができ、且つ、隅区画壁が平面視でＬ状となっていてＬ状の各辺がパレットの隅部において直角に隣接する２辺に対して平行となっており、平面視でパレットの４隅に位置する隅の筒状桁に設けたＬ状をした隅区画壁と、４つの中間の筒状桁に設けた中間区画壁と、隣接する隅の筒状桁と中間の筒状桁とを連結する補強上桟とで四角環状をした環状補強部を構成するので、平面視Ｌ状をした隅区画壁、中間区画壁、厚肉の補強上桟、下桟が四角環状に連続した環状補強部によりパレットの表面部ひいては全体を補強でき、且つ、平面視Ｌ状をした隅区画壁の外側の角部と、これと対向する隅の筒状桁の外側の角部との間に第２の隅区画壁を一体に架設してあるので、上記四角環状に連続した環状補強部の角部である平面視Ｌ状をした隅区画壁の補強を第２の隅区画壁により行うことができるものであり、これらの結果、本発明においては、４方差しパレットにおいていずれの方向からフォーク挿入孔にフォークを挿入して持ち上げても、環状補強部とその角部である平面視Ｌ状をした隅区画壁の補強を第２の隅区画壁により同じ条件で変形防止ができて変形しにくいパレットを提供できるものである。
【図面の簡単な説明】
【図１】本発明において環状補強部、筒状桁、十字状補強部を破線で表示したパレットの平面図である。
【図２】本発明のパレットの平面図である。
【図３】同上の下面図である。
【図４】同上の正面図である。
【図５】同上の側面図である。
【図６】図２のＸ−Ｘ線断面図である。
【図７】図２のＹ−Ｙ線断面図である。
【図８】同上のパレットの要部の平面図を示す拡大平面図である。
【図９】同上の要部の拡大断面図である。
【符号の説明】
１表面部
２裏面部
３ａ隅の筒状桁
３ｂ中間の筒状桁
４フォーク挿入孔
６パレット
１２上桟
１２ａ補強上桟
１５下桟
３０隅区画壁
３１中間区画壁
３２環状補強部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pallet made of synthetic resin.
[0002]
[Prior art]
Conventionally, the cylindrical girders at the corners connecting the corners of the front surface part and the back surface part, the intermediate cylindrical girders connecting the intermediate parts around the front surface part and the back surface part, and the center of the front surface part and the back surface part One-sided synthetic resin that is connected by a central cylindrical girder that connects the parts, has a fork insertion hole formed in the shape of a well between the cylindrical girder, and the surface part is a load placement surface A four-way pallet is known. This pallet has a plurality of upper and lower rails between the corner cylindrical beam and the intermediate cylindrical beam in the fork insertion hole portion between the cylindrical tube beam at the corner and the intermediate cylindrical beam. Was erected.
[0003]
By the way, the pallet can be lifted with the fork inserted into the fork insertion hole with the load placed on the surface of the load placement surface, and the fork placed against the lower surface of the upper rail of the fork insertion hole. Thus, when the fork is inserted into the fork insertion hole and the pallet is lifted, there is a problem that the pallet is likely to be deformed if the loaded object is heavy.
[0004]
Therefore, in order to improve the strength of the pallet so that it does not deform even when a heavy object is placed, it is possible to increase the thickness of each part, but simply increase the thickness of each part. However, there are problems that the amount of synthetic resin used increases, the production cost increases, and the weight increases.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems of the conventional example, and suppresses the amount of resin used as much as possible, improves the strength with a rational configuration, and places the object on the fork insertion hole. It is an object of the present invention to provide a synthetic resin pallet having a structure in which the pallet is not easily deformed even when the fork is inserted and lifted.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a pallet made of synthetic resin according to the present invention includes a cylindrical girder 3a at a corner connecting the corners of the front surface portion 1 and the back surface portion 2, and the periphery of the front surface portion 1 and the back surface portion 2. Are connected by an intermediate cylindrical girder 3b that connects the middle parts of the two, and a central cylindrical girder 3c that connects the central parts of the front surface part 1 and the back surface part 2, and a fork insertion hole between the cylindrical girder 3 4 is a single-sided synthetic resin four-way pallet formed integrally with a synthetic resin having a well shape and a surface portion 1 serving as a load placement surface. The inside is partitioned by a corner partition wall 30 extending from the front and back surfaces 1 and 2, and the middle cylindrical girder 3b is partitioned by an intermediate partition wall 31 extending from the front and back surfaces 1 and 2, and the corner cylindrical beam 3a and the intermediate cylindrical beam 3b between the cylindrical girder 3a at the corner and the intermediate cylindrical girder 3b on the fork insertion hole 4 between A plurality of upper beams 12 are erected, and the connecting portions to the cylindrical beam 3 at each end of one upper beam 12 among the plurality of upper beams 12 are connected to the cylindrical beam 3 a at the corner of the corner partition wall 30. Both ends of the plurality of upper rails 12 are arranged between the corner cylindrical girder 3a and the intermediate cylindrical girder 3b, and are matched with the connection portion of the middle and the intermediate partition wall 31 with the middle cylindrical girder 3b. The upper beam 12 that coincides with the connecting portion of the corner partition wall 30 with the cylindrical girder 3a at the corner and the connecting portion of the intermediate cylindrical wall 31 with the cylindrical girder 3b is provided between the corner cylindrical girder 3a and the middle. The reinforcing upper crosspiece 12a is thicker than the other upper crosspiece 12 connecting the cylindrical girder 3b, and the intermediate partition wall 31 is parallel to the side of the pallet 6 where the intermediate partition wall 31 exists in plan view. The intermediate partition wall 31 and the reinforcing upper bars 12a on both sides continuous with the intermediate partition wall 31 are in a straight line in plan view, and the corner partition 30 is L-shaped in plan view, and each side of the L-shape is parallel to two sides adjacent at right angles at the corners of the pallet, and the cylinders at the corners located at the four corners of the pallet in plan view An L-shaped corner partition wall 30 provided in the cylindrical girder 3a, an intermediate partition wall 31 provided in the four intermediate cylindrical girders 3b, a cylindrical girder 3a in the adjacent corner, and an intermediate cylindrical girder 3b An annular reinforcing portion 32 having a quadrangular annular shape is formed with the reinforcing upper rail 12 to be connected, and the outer corner of the corner partition wall 30 having the L shape in plan view and the outer side of the cylindrical girder 3a at the corner facing the corner. The second corner partition wall 33 is integrally built between the corner portions of the first and second corner sections .
[0007]
With such a configuration, the corner cylindrical girder 3a is partitioned by the corner partition wall 30, and the intermediate cylindrical girder 3b is partitioned by the intermediate partition wall 31, and the corner cylindrical girder 3a and the intermediate cylindrical girder are formed. Not only can the girder 3b be reinforced, but also the cylindrical girder 3a at this corner is connected to the corner partition wall 30 that reinforces the corner partition wall 30 and the intermediate partition wall 31 that reinforces the intermediate cylindrical girder 3b. Since the crosspiece 12 is installed, the strength of the surface portion 1 on which the fork hits in the fork insertion hole 4 can be reinforced, and both ends thereof are connected to the connecting portion with the cylindrical girder 3a at the corner of the corner partition wall 30. The upper frame 12 which is continuously integrated in accordance with the connection portion between the intermediate partition wall 31 and the intermediate cylindrical girder 3b is connected to the upper cylindrical beam 3a between the corner cylindrical girder 3a and the intermediate cylindrical girder 3b. Since the reinforcing upper crosspiece 12a is thicker than the crosspiece 12, the portion where the thickness is increased It is those that can be the direction of reinforcement perpendicular to the fork insertion direction of the effective surface part 1 while keeping a small limited, especially, in the present invention, both sides of the reinforcement on the crosspiece which is continuous with the intermediate partition wall 31 to 12a is straight in a plan view, and can be reinforced in a direction perpendicular to the fork insertion direction of the surface portion 1, and a corner partition wall 30, an intermediate partition wall 31, and a thick reinforcing upper rail having a L shape in a plan view. 12, the surface portion 1 of the pallet 6 and the whole can be reinforced by the annular reinforcing portion 32 in which the lower rail 15 is continuous in a square annular shape, and further, the outer corner portion of the corner partition wall 30 having an L shape in plan view, Since the second corner partition wall 33 is integrally built between the opposite corner of the cylindrical girder 3a at the opposite corner, it is a corner of the annular reinforcing portion 32 that is continuous in the above-mentioned quadrangular ring shape. Reinforcing the corner partition wall 30 having the L shape in plan view is performed by the second corner partition wall 3. It can be carried out by.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0012]
One embodiment of the pallet 6 of the present invention is shown in the accompanying drawings. In FIG. 1, the pallet 6 which is a plan view of the pallet 6 in which an annular reinforcing portion 32, a cylindrical girder 3 and a cross-shaped reinforcing portion 35, which will be described later, are indicated by broken lines, is integrally injection-molded with a synthetic resin, The part 1 and the back surface part 2 are integrally connected by a plurality of cylindrical girders 3. That is, as shown in FIG. 1, the front surface portion 1 and the back surface portion 2 include four corner girders 3 a that connect the corner portions of the front surface portion 1 and the back surface portion 2, and the front surface portion 1 and the back surface portion. 2 are connected by four intermediate cylindrical girders 3b that connect the middle portions around the two, and one central cylindrical girder 3c that connects the center portions of the front surface portion 1 and the back surface portion 2. is there. In this way, 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 3b, and the one central cylindrical girder 3c. By doing so, a four-way pallet 6 is formed in which the fork insertion hole 4 is formed in a well shape between the cylindrical girders 3 described above. As shown in FIGS. 3 and 6, the pallet 6 is formed with a lower opening 5 at a portion where the fork insertion hole 4 in the shape of a square in the back surface 2 intersects. The pallet 6 in the present invention is a single-sided pallet in which the surface portion 1 is a mounting surface.
[0013]
As shown in FIG. 2, a plurality of crosspieces 10 are formed between the middle cylindrical girder 3 and the central cylindrical girder 3 c of the surface portion 1, and a fork insertion hole in the surface portion 1. A plurality of crosspieces 11 are formed in a portion (that is, a portion directly above the lower opening 5 of the surface portion 1) located above the portion where 4 intersects vertically and horizontally. A plurality of crosspieces 12 are formed between the cylindrical beam 3 at the corner of the surface portion 1 and the cylindrical beam 3 at the intermediate portion.
[0014]
As shown in FIG. 3, a plurality of crosspieces 13 are arranged between the intermediate cylindrical girder 3 and the central cylindrical girder 3 c of the back surface portion 2 so as not to overlap with the crosspiece 10 of the surface portion 1. As shown in FIG. 6, the crosspiece 13 is formed with inclined portions 7 at both ends of the lower opening 5 side on the upper surface side (that is, the side facing the fork insertion hole 4), and between the upper ends of both inclined portions 7. Is the horizontal portion 14. A plurality of crosspieces 15 are formed between the cylindrical girder 3 at the corner of the back surface portion 2 and the cylindrical girder 3 at the intermediate portion, and this crosspiece 15 is on the upper surface side (that is, the side facing the fork insertion hole 4). ) The lower opening 5 side end and the fork insertion side end are the inclined portions 7, and the horizontal portion 14 is between the upper ends of both inclined portions 7.
[0015]
Therefore, the inclined portion 7 is formed on the upper surface of the back surface portion 2 at the entrance portion of the fork insertion hole 4, and the inclined portions are formed along the four sides of the four lower openings 5 formed on the back surface portion 2. 7 is formed.
[0016]
Here, the above-mentioned back surface portion of the portion connecting the cylindrical girder 3 at the corner and the cylindrical girder 3 at the middle portion and the portion connecting the cylindrical girder 3 at the middle portion and the cylindrical girder 3c at the center portion on the front surface portion 1 An elongated opening 8 for punching is formed at a position corresponding to the upper position of the two inclined portions 7.
[0017]
As shown in FIG. 1 and FIG. 8, the cylindrical girder 3a at each corner is partitioned by a corner partition wall 30, and the corner partition wall 30 is constituted by vertical walls whose upper and lower ends reach the front and back surfaces 1 and 2. It is. As described above, the inside of the cylindrical girder 3a at the corner is partitioned by the corner partition wall 30, and the corner partition wall 30 is integrated with the cylindrical tube girder 3a at the corner, so that the strength of the cylindrical girder 3a at the corner is improved. The corner partition wall 30 has an L shape in plan view, and each side in the plan view L shape is parallel to two sides adjacent to each other at a right angle at the corner of the pallet 6, and the corner in the plan view L shape. Both end portions of the partition wall 30 are integrally connected to the wall portions facing the fork insertion holes 4 on both sides of the cylindrical girder 3a at the corner. A second corner partition wall 33 is integrally formed between the outer corner of the corner partition wall 30 having a L shape in plan view and the outer corner of the cylindrical girder 3a at the corner facing the corner. The second corner partition wall 33 is constituted by vertical walls whose upper and lower ends reach the front and back surfaces 1 and 2, and the second corner partition wall 33 partitions the corner cylindrical girders 3 a further. It is subdivided, thereby improving the strength of the cylindrical girder 3a at the corner, and further reinforcing the corner partition wall 30 having a L shape in plan view.
[0018]
As shown in FIGS. 1 and 8, each intermediate cylindrical girder 3 b is partitioned by an intermediate partition wall 31, and the intermediate partition wall 31 is formed by vertical walls whose upper and lower ends reach the front and back surface portions 1 and 2. It is configured. Thus, the intermediate cylindrical girder 3b is partitioned by the intermediate partition wall 31, and the intermediate partition wall 31 is integrated with the intermediate cylindrical girder 3b, thereby improving the strength of the intermediate cylindrical girder 3b. The intermediate partition wall 31 is parallel to the side of the pallet 6 where the intermediate partition wall 31 exists in plan view, and both ends of the intermediate partition wall 31 face the fork insertion holes 4 on both sides of the intermediate cylindrical girder 3b. Is integrally connected to the wall portion. Further, the intermediate cylindrical girder 3b is provided with a second intermediate partition wall 34 orthogonal to the central portion of the intermediate partition wall 31. This second intermediate partition wall 34 is integrally connected to a wall portion orthogonal to the wall portions facing the fork insertion holes 4 on both sides of the intermediate cylindrical girder 3b. In addition, the central portion of the intermediate partition wall 31 and the central portion of the intermediate partition wall 31 are integrally connected. Thus, by dividing by the second intermediate partition wall 34, the inside of the intermediate cylindrical girder 3b is further subdivided, thereby further improving the strength of the intermediate cylindrical girder 3b. The wall 31 is also reinforced.
[0019]
Above and below the fork insertion hole 4 between the cylindrical tube girder 3a at the corner and the intermediate cylindrical beam 3b, there are a plurality of upper rails 12 and a plurality of lower rails between the cylindrical tube girder 3a at the corner and the intermediate cylindrical beam 3b. A crosspiece 15 is installed.
[0020]
And the connection part to the cylindrical girder 3 of each corner of one upper beam 12 among the plurality of upper beams 12 is connected to the cylindrical beam 3a at the corner of the corner partition wall 30 and the intermediate partition wall 31. It corresponds to the connecting portion with the intermediate cylindrical girder 3b. Of the plurality of upper rails 12 laid between the corner cylindrical girder 3a and the middle cylindrical girder 3b, both end portions of the corner partition wall 30 are connected to the corner cylindrical girder 3a and the intermediate partition wall 31. Reinforcement with a thickness greater than that of the other upper beam 12 that connects the upper beam 12 that coincides with the connecting portion of the intermediate cylindrical beam 3b between the cylindrical beam 3a at the corner and the intermediate cylindrical beam 3b. It is an upper rail 12a. Here, as an example, in FIG. 9, among the plurality of upper rails 12, the upper thickness T1 of the reinforcing upper rail 12a is 3 mm, the lower thickness T2 is 4.2 mm, and the upper thickness t1 of the other upper rail 12 is. Is 2.5 mm and the lower thickness t2 is 3.7 mm.
[0021]
As described above, the inside of the cylindrical girder 3b provided in each intermediate portion of the four sides of the pallet 6 and the L-shaped corner dividing wall 30 in plan view that divides the inside of the cylindrical girder 3a at the four corners of the pallet 6 is used. An intermediate partition wall 31 that is parallel to each side to be partitioned, and a cylindrical girder 3a at an adjacent corner and an intermediate cylindrical girder 3b, and both ends thereof are integrally connected to the corner partition wall 30 and the intermediate partition wall 31. The reinforcing upper rail 12a and the lower rail 15 that are to be formed constitute an annular reinforcing portion 32 having a quadrangular annular shape in plan view.
[0022]
As shown in FIG. 1, the annular reinforcing portion 32 having a quadrangular shape in plan view includes an intermediate partition wall 31 that is linear in plan view along each side of the pallet 6, and reinforcing upper bars 12a on both sides that are continuous with the intermediate partition wall 31. And the lower rail 15 and each piece of the L-shaped corner partition wall 30 in plan view on both sides that are continuous with each other are in a straight line in plan view, and four sides with this as one side are L-shaped corners of each corner. The corner portion of the partition wall 30 has a continuously continuous shape and serves as a core material that reinforces the entire pallet 6. And, the four sides of the annular reinforcing portion 32 having a quadrangular shape in plan view are all in a straight line, so that reinforcement in the direction orthogonal to each insertion direction of the four-way fork insertion hole 4 can be performed. In particular, in the surface portion 1, the thick reinforcing upper rail 12 a is continuously connected in a straight line to the corner partition wall 30 and the intermediate partition wall 31 in the fork insertion hole 4 portion. The reinforcement in the orthogonal direction can be performed.
[0023]
As shown in FIG. 1, a cross-shaped reinforcing portion 35 is further provided in the annular reinforcing portion 32 having a quadrangular annular shape in plan view, and the inside of the annular reinforcing portion 32 is divided into four.
[0024]
The cross-shaped reinforcing portion 35 is provided in the central cylindrical girder 3c and has a central partition wall 36 having a cross shape in plan view, and a cross-shaped partition wall 36 of the central cylindrical girder 3c and an intermediate cylindrical girder. And a lower connecting bar 13a that connects the second intermediate partition wall 34 of 3b, and a connection portion with the cylindrical girder 3c at the center of each cross-shaped end of the cross-shaped partition wall 36 and the bottom The connecting portion with the cylindrical girder 3c at the center of the connecting bar 13a coincides in plan view, and the connecting portion with the intermediate cylindrical girder 3b at one end of the second intermediate partition wall 34 and the lower connecting bar The connection part with the intermediate cylindrical beam 3b of 13a corresponds in plan view. The cross-shaped partition wall 36 is constituted by vertical walls whose upper and lower ends extend to the upper and lower back surface portions 1 and 2, and the inside of the cylindrical girder 3 c in the center is partitioned by the cross-shaped partition wall 36, The cylindrical girder 3c is reinforced. Further, the inside of the annular reinforcing portion 32 having a rectangular shape in plan view of the pallet 6 is further partitioned by a cross-shaped reinforcing portion 35 and each end of the cross-shaped reinforcing portion 35 is integrated with the annular reinforcing portion 32 having a square shape in plan view. By connecting, the pallet 6 having a square shape in a plan view is reinforced in a square shape in a plan view, and the entire four-way pallet 6 is reinforced.
[0025]
【The invention's effect】
In the present invention according to claim 1, in the four-sided pallet made of synthetic resin that is integrally formed of synthetic resin, the inside of the cylindrical girder at the corner is partitioned by the corner partition wall that extends across the front and back surfaces, Since the inside of the middle cylindrical girder is partitioned by the intermediate partition wall extending across the front and back surfaces, the corner cylindrical girder is partitioned by the corner partition wall, and the intermediate cylindrical girder is partitioned by the intermediate partition wall to form the corner cylindrical The girder and the intermediate cylindrical girder can be reinforced, and the corner cylindrical girder and the intermediate cylindrical girder are formed on the fork insertion hole between the cylindrical girder at the corner and the intermediate cylindrical girder. A plurality of upper rails are installed in between, and the connection portions to the cylindrical girders at both ends of one of the upper rails are connected to the cylindrical girders at the corners of the corner partition walls and the intermediate partition walls A plurality of pipes installed between the middle cylindrical girder and the middle cylindrical girder are matched with the connection part of the middle cylindrical girder. The upper beam whose both ends coincide with the connecting part between the cylindrical girder at the corner of the corner partition wall and the cylindrical girder in the middle of the intermediate dividing wall Since it is a reinforcing upper crosspiece that is thicker than other upper crosspieces that connect between the cylindrical girders, it is effective in a direction perpendicular to the fork insertion direction on the surface while minimizing the portion where the thickness is increased. In particular, the intermediate partition wall is parallel to the side where the intermediate partition wall of the pallet is present in plan view, and the intermediate partition wall and the reinforcing upper bars on both sides that are continuous with the intermediate partition wall are straight in plan view. Therefore, the intermediate partition wall and the reinforcing upper bars on both sides continuous to the intermediate partition wall are straight in a plan view, and can be reinforced in a direction perpendicular to the fork insertion direction of the surface portion with a rational configuration, and The corner partition walls are L-shaped in plan view, and each L-shaped side is at the corner of the pallet It is parallel to the two sides adjacent to the corners, and has an L-shaped corner partition wall provided on the cylindrical girders at the corners located at the four corners of the pallet in plan view, and four intermediate cylindrical girders. Since the provided intermediate partition wall and the annular reinforcing portion having a quadrangular annular shape are formed by the adjacent corner cylindrical girder and the reinforcing upper beam connecting the intermediate cylindrical girder, the corner partition wall having an L shape in plan view An intermediate partition wall, a thick reinforcing upper rail, and a lower rail can reinforce the surface portion of the pallet and the entire corner by an annular reinforcing portion that is continuous in a square ring shape. Since the second corner partition wall is integrally constructed between the outer corner of the cylindrical girder at the opposite corner, the plane that is the corner of the annular reinforcing portion that is continuous in the quadrangular ring shape. Reinforcement of the L-shaped corner section wall can be performed by the second corner section wall, and as a result, in the present invention Even if a fork is inserted into the fork insertion hole and lifted from any direction in the four-way pallet, the second corner section is used to reinforce the annular reinforcing section and the corner section wall having the L shape in plan view that is the corner section. The wall can provide a pallet that can be prevented from being deformed under the same conditions and is difficult to deform.
[Brief description of the drawings]
FIG. 1 is a plan view of a pallet in which an annular reinforcing portion, a cylindrical girder, and a cross-shaped reinforcing portion are indicated by broken lines in the present invention.
FIG. 2 is a plan view of a pallet according to the present invention.
FIG. 3 is a bottom view of the same.
FIG. 4 is a front view of the above.
FIG. 5 is a side view of the above.
6 is a cross-sectional view taken along line XX in FIG.
7 is a cross-sectional view taken along line YY in FIG.
FIG. 8 is an enlarged plan view showing a plan view of the main part of the pallet.
FIG. 9 is an enlarged cross-sectional view of the main part of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front surface part 2 Back surface part 3a Corner cylindrical girder 3b Middle cylindrical girder 4 Fork insertion hole 6 Pallet 12 Upper beam 12a Reinforcement upper beam 15 Lower beam 30 Corner division wall 31 Intermediate division wall 32 Annular reinforcement part

Claims

The cylindrical girders at the corners connecting the corners of the front surface portion and the back surface portion, the intermediate cylindrical girders connecting the middle portions around the front surface portion and the back surface portion, and the center portions of the front surface portion and the back surface portion The fork insertion holes are formed in the shape of a well between the cylindrical girders, and the surface portion is formed integrally with a synthetic resin. A four-way pallet made of synthetic resin that is used on one side, and the inside of the corner cylindrical girder is partitioned by a corner partition wall that extends across the front and back surfaces, and the middle cylindrical beam is partitioned by an intermediate partition wall that extends across the front and back surfaces. A plurality of upper beams are installed between the corner cylindrical beam and the intermediate cylindrical beam on the fork insertion hole between the cylindrical beam and the intermediate cylindrical beam. Connect the connecting part to the cylindrical girder at each end of each of the upper crosspieces with the connecting part with the cylindrical girder at the corner of the corner partition wall and the middle of the intermediate partition wall Of the plurality of upper beams installed between the corner cylindrical beam and the intermediate cylindrical beam, the ends of which are connected to the cylindrical beam at the corner of the corner partition wall. The upper beam that coincides with the connecting part between the intermediate partition wall and the intermediate cylindrical beam is thicker than the other upper beam that connects the corner cylindrical beam and the intermediate cylindrical beam The intermediate partition wall is parallel to the side where the intermediate partition wall of the pallet is present in plan view, and the intermediate partition wall and the reinforcing top bars on both sides continuous with the intermediate partition wall are in a straight line in plan view. The corner partition wall is L-shaped in plan view, and each side of the L-shape is parallel to two adjacent sides at right angles at the corners of the pallet, and at the four corners of the pallet in plan view. An L-shaped corner partition wall provided in a cylindrical girder at a corner, a middle partition wall provided in four middle cylindrical girders, and a cylindrical girder in an adjacent corner An annular reinforcing portion having a quadrangular annular shape is formed with a reinforcing upper beam connecting an intermediate cylindrical girder, and the outer corner of the corner partition wall having the L shape in plan view, and the cylindrical shape of the corner facing the corner A synthetic resin pallet comprising a second corner partition wall which is integrally constructed between the outer corners of the beam.