JP6892228B2

JP6892228B2 - Assembled pallet

Info

Publication number: JP6892228B2
Application number: JP2016129750A
Authority: JP
Inventors: 伊藤　憲治; 憲治伊藤; 雅幸兵頭
Original assignee: Ube Exsymo Co Ltd
Current assignee: Ube Exsymo Co Ltd
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2021-06-23
Anticipated expiration: 2036-06-30
Also published as: JP2018002207A

Description

本発明は、組立式パレットに関する。より詳しくは、桁と載荷板が脱着可能な組立式パレットに関する。 The present invention relates to an assembling pallet. More specifically, it relates to a prefabricated pallet in which the girder and the loading plate are removable.

従来から、輸送、物流、保管等において、載荷板と桁とから成るパレットが多用されている。例えば、特許文献１には、プラ段で構成されたデッキボードとプラスチック製の足桁とを備えた搬送用パレットが開示されている。この搬送用パレットは、デッキボードと足桁とが溶着により固定されているため、組み立てが容易ではないといった問題がある。 Conventionally, pallets composed of loading plates and girders have been widely used in transportation, distribution, storage, and the like. For example, Patent Document 1 discloses a transport pallet including a deck board composed of plastic steps and a plastic foot girder. This transport pallet has a problem that it is not easy to assemble because the deck board and the foot girder are fixed by welding.

また、特許文献１の搬送用パレットは、パレット移動時等において、足桁間にフォークリフトのフォーク等を差し込む際、桁側面にフォーク等をぶつけてしまうことの衝撃による桁外れや破損等が生じた場合に、桁の交換を容易に行うことができない。 In addition, the transport pallet of Patent Document 1 is damaged or damaged due to the impact of hitting the fork or the like on the side surface of the girder when inserting the fork or the like of the forklift between the foot girders when moving the pallet or the like. In addition, the girders cannot be easily exchanged.

更に、一旦、組み立てられた特許文献１の搬送用パレットは、足桁を取り外すことができないため、パレット自体を保管したり輸送したりする場合に、多くの場所を取るといった問題があった。 Further, since the transport pallet of Patent Document 1 once assembled cannot be removed from the foot girder, there is a problem that it takes up a lot of space when the pallet itself is stored or transported.

そこで、近年では、桁と載荷板が脱着可能な組立式パレットが用いられつつある。例えば、特許文献２には、板状体を折り畳んで形成された複数の桁部材と、該桁部材に載置された天板とを有し、多量な接着剤や煩雑な接着剤塗布作業を要せずに低廉に作製できると共に、使用者側でも容易に組み立てることが可能な桁付きパレットが開示されている。 Therefore, in recent years, assembling pallets with removable girders and loading plates have been used. For example, Patent Document 2 includes a plurality of girder members formed by folding a plate-like body and a top plate placed on the girder members, and performs a large amount of adhesive and complicated adhesive application work. A pallet with a girder that can be manufactured at low cost without the need and can be easily assembled by the user is disclosed.

特開２０１４−１６２５３５号公報Japanese Unexamined Patent Publication No. 2014-162535 特開２０１５−１３４６４０号公報Japanese Unexamined Patent Publication No. 2015-134640

特許文献２に開示された桁付きパレットは、接着剤を用いることなく載荷板と桁とを脱着可能に強固に組み立てることが可能であるが、桁の固定が甘く、グラつくといった問題があった。また、載荷板面から取り付ける係止部材によって、載荷板上面に段差が生じ、載せた荷物に段差痕が転写したり、パレットを積み上げる際に安定性が悪く、場合によっては落下するといった問題があった。 The pallet with a girder disclosed in Patent Document 2 can be firmly assembled so that the loading plate and the girder can be detachably attached without using an adhesive, but there is a problem that the girder is loosely fixed and glaring. .. In addition, the locking member attached from the loading plate surface causes a step on the upper surface of the loading plate, and there is a problem that the step mark is transferred to the loaded load, the stability is poor when stacking the pallets, and the pallet is dropped in some cases. It was.

そこで、本発明では、接着剤や溶着等の固定方法を用いずに、載荷板と桁とを組み立てることが可能で、荷物への段差痕が転写し難く、パレットを積み上げる際の安定性が高い組立式パレットを提供することを主目的とする。 Therefore, in the present invention, it is possible to assemble the loading plate and the girder without using a fixing method such as adhesive or welding, the step marks on the luggage are hard to be transferred, and the stability when stacking the pallets is high. The main purpose is to provide a prefabricated pallet.

本願発明者らは、組立式パレットの構造について鋭意研究を行った結果、載荷板と桁との構造及び固定方法に着目することにより、前記課題を解決し得る組立式パレットが得られることを見出し、本発明を完成させるに至った。 As a result of diligent research on the structure of the assembling pallet, the inventors of the present application have found that by paying attention to the structure and fixing method of the loading plate and the girder, an assembling pallet capable of solving the above problems can be obtained. , The present invention has been completed.

すなわち、本発明では、複数の桁と、該桁が着脱可能に設けられる熱可塑性樹脂からなる載荷板と、を有する組立式パレットであって、
前記桁は、一対の挟持部と、該一対の挟持部間に設けられた挿通部と、桁本体と、を有し、
前記載荷板は、厚板部と、少なくとも載荷面側が凹んだ薄板部と、該薄板部に設けられた貫通孔と、を有し、
組立時において、
前記桁の前記挿通部が、前記載荷板の前記貫通孔を貫通し、
前記載荷板の前記薄板部を、前記桁の前記一対の挟持部によって挟持された状態で固定される、組立式パレットを提供する。
本発明に係る組立式パレットにおいて、前記薄板部の載荷面には、前記厚板部に連続する厚み勾配を有していてもよい。
また、本発明に係る組立式パレットにおいて、前記桁には、少なくとも一対の係止部を備えることができ、この際、組立時には、前記係止部が嵌合することにより固定することができる。
更に、本発明に係る組立式パレットにおいて、前記厚板部の曲げ弾性勾配／前記薄板部の最薄部の曲げ弾性勾配を、５．０未満とすることができる。 That is, in the present invention, it is an assembly type pallet having a plurality of girders and a loading plate made of a thermoplastic resin to which the girders are detachably provided.
The girder has a pair of holding portions, an insertion portion provided between the pair of holding portions, and a girder main body.
The load plate described above has a thick plate portion, a thin plate portion having at least a recessed loading surface side, and a through hole provided in the thin plate portion.
At the time of assembly
The insertion portion of the girder penetrates the through hole of the load plate described above,
Provided is an assembling pallet in which the thin plate portion of the load plate described above is fixed in a state of being sandwiched by the pair of sandwiching portions of the girder.
In the assembled pallet according to the present invention, the loading surface of the thin plate portion may have a thickness gradient continuous with the thick plate portion.
Further, in the assembly type pallet according to the present invention, the girder may be provided with at least a pair of locking portions, and at this time, at the time of assembly, the locking portions can be fitted and fixed.
Further, in the assembled pallet according to the present invention, the bending elastic gradient of the thick plate portion / the bending elastic gradient of the thinnest portion of the thin plate portion can be set to less than 5.0.

本発明では、また、複数の桁と、該桁が着脱可能に設けられる熱可塑性樹脂からなる載荷板と、前記桁が着脱可能に設けられる熱可塑性樹脂からなる底板と、を有する組立式パレットであって、
前記桁は、二対の挟持部と、該二対のそれぞれの挟持部間に設けられた挿通部と、桁本体と、を有し、
前記載荷板は、厚板部と、少なくとも載荷面側が凹んだ薄板部と、該薄板部に設けられた貫通孔と、を有し、
前記底板は、厚板部と、少なくとも低面側が凹んだ薄板部と、該薄板部に設けられた貫通孔と、を有し、
組立時において、
前記桁のそれぞれの前記挿通部が、前記載荷板及び前記底板の前記貫通孔を貫通し、
前記載荷板及び前記底板の前記薄板部を、前記桁の前記二対の挟持部によってそれぞれ挟持された状態で固定される、組立式パレットも提供する。 The present invention also comprises an assembling pallet having a plurality of girders, a loading plate made of a thermoplastic resin to which the girder is detachably provided, and a bottom plate made of a thermoplastic resin to which the girder is detachably provided. There,
The girder has two pairs of sandwiching portions, an insertion portion provided between the two pairs of sandwiching portions, and a girder body.
The load plate described above has a thick plate portion, a thin plate portion having at least a recessed loading surface side, and a through hole provided in the thin plate portion.
The bottom plate has a thick plate portion, a thin plate portion having at least a recessed low surface side, and a through hole provided in the thin plate portion.
At the time of assembly
Each of the insertion portions of the girder penetrates the through hole of the load plate and the bottom plate described above.
Also provided is an assembling pallet in which the thin plate portion of the load plate and the bottom plate described above is fixed in a state of being sandwiched by the two pairs of sandwiching portions of the girder.

本発明によれば、接着剤や溶着等の固定方法を用いずに、載荷板と桁とを組み立てることが可能で、荷物への段差痕が転写し難く、パレットを積み上げる際の安定性が高い組立式パレットを提供することができる。なお、ここに記載された効果は、必ずしも限定されるものではなく、本開示中に記載されたいずれかの効果であってもよい。 According to the present invention, it is possible to assemble the loading plate and the girder without using a fixing method such as adhesive or welding, the step marks on the load are hard to be transferred, and the stability when stacking the pallets is high. Assembled pallets can be provided. The effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

本発明に係る組立式パレット１の全体構造を模式的に示す斜視図である。It is a perspective view which shows typically the whole structure of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立前の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of 1st Embodiment before assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す斜視図である。It is a perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of 1st Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。It is sectional drawing which shows typically the assembly part of the girder 11 and the loading plate 12 of 1st Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立前の第２実施形態の桁１１と載荷板１２との組立部を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of the 2nd Embodiment before the assembly of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の載荷板１２として用いることができる中空構造板２の一例を模式的に示す斜視図である。It is a perspective view which shows typically an example of the hollow structure plate 2 which can be used as the loading plate 12 of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第３実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。It is sectional drawing which shows typically the assembly part of the girder 11 and the loading plate 12 of the 3rd Embodiment after assembly of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第４実施形態の全体構造を模式的に示す斜視図である。It is a perspective view which shows typically the whole structure of 4th Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立前の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す分解斜視図である。It is an exploded perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of 4th Embodiment before the assembly of the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す斜視図である。It is a perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of 4th Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。It is sectional drawing which shows typically the assembly part of the girder 11 and the loading plate 12 of 4th Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第５実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。It is sectional drawing which shows typically the assembly part of the girder 11 and the loading plate 12 of the 5th Embodiment after assembling the assembly type pallet 1 which concerns on this invention. 本発明に係る組立式パレット１の組立後の第６実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。It is sectional drawing which shows typically the assembly part of the girder 11 and the loading plate 12 of the 6th Embodiment after assembling the assembly type pallet 1 which concerns on this invention.

以下、本発明を実施するための好適な形態について、図面を参照しながら詳細に説明する。なお、以下に説明する実施形態は、本発明の代表的な実施形態の一例を示したものであり、これにより本発明の範囲が狭く解釈されることはない。 Hereinafter, suitable embodiments for carrying out the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments described below show an example of typical embodiments of the present invention, and the scope of the present invention is not narrowly interpreted by this.

図１は、本発明に係る組立式パレット１の全体構造を模式的に示す斜視図である。図２は、本発明に係る組立式パレット１の組立前の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す分解斜視図であり、図３は、本発明に係る組立式パレット１の組立後の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す斜視図である。本発明に係る組立式パレット１は、複数の桁１１と、載荷板１２と、を少なくとも有する。また、本発明に係る組立式パレット１は、必要に応じて、底板１３を有していてもよい。以下、各部材の構造等について詳細に説明する。 FIG. 1 is a perspective view schematically showing the overall structure of the assembled pallet 1 according to the present invention. FIG. 2 is an exploded perspective view schematically showing an assembled portion of the girder 11 and the loading plate 12 of the first embodiment before assembling the assembled pallet 1 according to the present invention, and FIG. 3 is an exploded perspective view schematically showing the assembled portion of the assembled pallet 1 according to the present invention. It is a perspective view which shows typically the assembly part of the girder 11 and the loading plate 12 of 1st Embodiment after the assembly type pallet 1. The assembled pallet 1 according to the present invention has at least a plurality of girders 11 and a loading plate 12. Further, the assembly type pallet 1 according to the present invention may have a bottom plate 13 if necessary. Hereinafter, the structure and the like of each member will be described in detail.

１．桁１１
本発明に係る組立式パレット１に用いる桁１１は、少なくとも一対の挟持部１１１（１１１ａ、１１１ｂ）と、挿通部１１２と、桁本体１１３と、を有する。また、本発明に係る組立式パレット１は、必要に応じて、後述する第４実施形態に示すように、挟持部１１１を二対以上有していてもよい（挟持部１１１ｃ、１１１ｄ（図１３〜１６の第４実施形態参照））。図４を用いて、各部の構造等を説明する。図４は、本発明に係る組立式パレット１の組立後の第１実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。 1. 1. Digit 11
The girder 11 used for the assembled pallet 1 according to the present invention has at least a pair of holding portions 111 (111a, 111b), an insertion portion 112, and a girder main body 113. Further, the assembled pallet 1 according to the present invention may have two or more pairs of holding portions 111 as shown in the fourth embodiment described later (holding portions 111c, 111d (FIG. 13)). ~ 16 (see the fourth embodiment)). The structure and the like of each part will be described with reference to FIG. FIG. 4 is a cross-sectional view schematically showing an assembled portion of the girder 11 and the loading plate 12 of the first embodiment after assembling the assembling type pallet 1 according to the present invention.

（１）挟持部１１１（１１１ａ、１１１ｂ、１１１ｃ、１１１ｄ）
挟持部１１１（１１１ａ、１１１ｂ）は、桁１１と後述する載荷板１２とを組み立てる際に、載荷板１２の薄板部１２２を挟持する部位である。また、本発明に係る組立式パレットに後述する底板１３を備える場合は、桁１１と底板１３とを組み立てる際に、底板１３の薄板部１３２を挟持する部位として備えることもできる（挟持部１１１ｃ、１１１ｄ（図１３〜１６の第４実施形態参照））。 (1) Holding portion 111 (111a, 111b, 111c, 111d)
The sandwiching portions 111 (111a, 111b) are portions that sandwich the thin plate portion 122 of the loading plate 12 when the girder 11 and the loading plate 12 described later are assembled. Further, when the assembly type pallet according to the present invention is provided with the bottom plate 13 described later, it can be provided as a portion for sandwiching the thin plate portion 132 of the bottom plate 13 when assembling the girder 11 and the bottom plate 13 (holding portion 111c, 111d (see the fourth embodiment of FIGS. 13 to 16).

後述する載荷板１２の薄板部１２２の載荷面１２２ａ側に配置される挟持部１１１ａの大きさは、特に限定されず、薄板部１２２の大きさ等に応じて自由に設計することができる。また、載荷板１２の非載荷面１２ｂ側に配置される挟持部１１１ｂの大きさも、特に限定されず、載荷面１２２ａ側に配置される挟持部１１１ａと同等の大きさとしても良いし、安定性を高めるために、載荷面１２２ａ側に配置される挟持部１１１ａより大きく設計することも可能である。 The size of the holding portion 111a arranged on the loading surface 122a side of the thin plate portion 122 of the loading plate 12 to be described later is not particularly limited, and can be freely designed according to the size of the thin plate portion 122 and the like. Further, the size of the holding portion 111b arranged on the non-loading surface 12b side of the loading plate 12 is not particularly limited, and may be the same size as the holding portion 111a arranged on the loading surface 122a side, and is stable. It is also possible to design the holding portion 111a to be larger than the holding portion 111a arranged on the loading surface 122a side.

また、後述する底板１３の薄板部１３２の上面１３ｂ側に配置される挟持部１１１ｃの大きさは、特に限定されず、目的に応じて自由に設計することができる。また、底板１３の底面１３２ａ側に配置される挟持部１１１ｄの大きさも、特に限定されず、薄板部１３２の大きさ等に応じて自由に設計することができ、上面１３ｂ側に配置される挟持部１１１ｃと同等の大きさとしても良いし、安定性を高めるために、上面１３ｂ側に配置される挟持部１１１ｃより大きく設計することも可能である。 Further, the size of the holding portion 111c arranged on the upper surface 13b side of the thin plate portion 132 of the bottom plate 13, which will be described later, is not particularly limited and can be freely designed according to the purpose. Further, the size of the sandwiching portion 111d arranged on the bottom surface 132a side of the bottom plate 13 is not particularly limited, and can be freely designed according to the size of the thin plate portion 132 or the like, and the sandwiching portion arranged on the upper surface 13b side can be freely designed. The size may be the same as that of the portion 111c, or it may be designed to be larger than the holding portion 111c arranged on the upper surface 13b side in order to improve stability.

（２）挿通部１１２（１１２ａ、１１２ｂ）
挿通部１１２は、一対の挟持部１１１間に設けられており、桁１１と後述する載荷板１２とを組み立てる際に、載荷板１２の貫通孔１２３を貫通する部位である。また、本発明に係る組立式パレットに後述する底板１３を備える場合は、桁１１と底板１３とを組み立てる際に、底板１３の貫通孔１３３を貫通する部位として備えることもできる（挿通部１１２ｂ（図１３〜１６の第４実施形態参照））。 (2) Insertion part 112 (112a, 112b)
The insertion portion 112 is provided between the pair of holding portions 111, and is a portion that penetrates the through hole 123 of the loading plate 12 when the girder 11 and the loading plate 12 described later are assembled. Further, when the assembly type pallet according to the present invention is provided with the bottom plate 13 described later, it can be provided as a portion penetrating the through hole 133 of the bottom plate 13 when assembling the girder 11 and the bottom plate 13 (insertion portion 112b (insertion portion 112b). (Refer to the fourth embodiment of FIGS. 13 to 16)).

挿通部１１２（１１２ａ、１１２ｂ）の形態や大きさは、特に限定されず、後述する載荷板１２の貫通孔１２３や後述する底板１３の貫通孔１３３の形態や大きさ等に応じて自由に設計することができる。本発明では特に、図５に示す第２実施形態のように、貫通孔１２２への挿通方向に垂直な断面形状が、多角形状であることが好ましい。多角形状であることで、桁１１の空転を防止することができる。 The form and size of the insertion portions 112 (112a, 112b) are not particularly limited, and can be freely designed according to the form and size of the through hole 123 of the loading plate 12 described later and the through hole 133 of the bottom plate 13 described later. can do. In the present invention, it is particularly preferable that the cross-sectional shape perpendicular to the insertion direction into the through hole 122 is a polygonal shape as in the second embodiment shown in FIG. The polygonal shape can prevent the girder 11 from slipping.

（３）桁本体１１３
桁本体１１３は、桁１１と後述する載荷板１２とを組み立てる際に、載荷板１２を支持する足桁として機能する部位である。 (3) Girder body 113
The girder body 113 is a portion that functions as a foot girder that supports the loading plate 12 when the girder 11 and the loading plate 12 described later are assembled.

桁本体１１３の大きさは、特に限定されず、載荷板１２の大きさ等や目的に応じて、自由に設計することができる。 The size of the girder body 113 is not particularly limited, and can be freely designed according to the size and purpose of the loading plate 12.

（４）桁１１の全体構成
本発明に係る組立式パレット１の桁１１は、少なくとも２以上に分解可能で、桁１１と後述する載荷板１２や底板１３とを組み立てる際に、全部位が合体することで載荷板１２や底板１３を支持する。より具体的な支持構成については、後述する各実施形態の説明において説明する。 (4) Overall Configuration of Girder 11 The girder 11 of the assembly type pallet 1 according to the present invention can be disassembled into at least two or more, and when the girder 11 and the loading plate 12 and the bottom plate 13 described later are assembled, all the parts are united. By doing so, the loading plate 12 and the bottom plate 13 are supported. A more specific support configuration will be described in the description of each embodiment described later.

桁１１に用いる材料は、特に限定されず、パレットの桁に用いることができる一般的な材料を１種又は２種以上自由に選択して用いることができる。本発明では特に、熱可塑性樹脂を用いることが好ましい。熱可塑性樹脂としては、例えば、ポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）、ポリスチレン（ＰＳ）、ポリウレタン、ポリカーボネート（ＰＣ）、ポリメチルメタクリレート（ＰＭＭＡ）、ポリ塩化ビニル（ＰＶＣ）等が挙げられる。 The material used for the girder 11 is not particularly limited, and one or more general materials that can be used for the girder of the pallet can be freely selected and used. In the present invention, it is particularly preferable to use a thermoplastic resin. Examples of the thermoplastic resin include polyethylene (PE), polypropylene (PP), polystyrene (PS), polyurethane, polycarbonate (PC), polymethylmethacrylate (PMMA), polyvinyl chloride (PVC) and the like.

これらの中でも特に、加工性、コスト、重量及び物性の観点から、低密度ポリエチレン、高密度ポリエチレン（ＨＤＰＥ）、直鎖状低密度ポリエチレン、超低密度ポリエチレン、ポリプロピレンホモポリマー、ポリプロピレンランダムコポリマー、ポリプロピレンブロックコポリマー等のオレフィン系樹脂が好ましい。また、本発明では、更に高い剛性を得るため、ＡＢＳ樹脂、ポリカーボネート等のエンジニアリング・プラスチックを用いることもできる。 Among these, especially from the viewpoint of processability, cost, weight and physical properties, low density polyethylene, high density polyethylene (HDPE), linear low density polyethylene, ultra low density polyethylene, polypropylene homopolymer, polypropylene random copolymer, polypropylene block Olefin resins such as copolymers are preferred. Further, in the present invention, engineering plastics such as ABS resin and polycarbonate can be used in order to obtain higher rigidity.

本発明では、桁１１や後述する載荷板１２および底板１３を形成する熱可塑性樹脂には、タルク、マイカ、炭酸カルシウム等のフィラー、ガラス繊維、アラミド繊維、炭素繊維等のチョップドストランドを添加してもよい。 In the present invention, fillers such as talc, mica and calcium carbonate, and chopped strands such as glass fiber, aramid fiber and carbon fiber are added to the thermoplastic resin forming the girder 11, the loading plate 12 and the bottom plate 13 described later. May be good.

また、桁１１や後述する載荷板１２および底板１３を形成する熱可塑性樹脂には、難燃性、導電性、濡れ性、滑り性及び耐候性などを向上させるための改質剤や顔料等の着色剤などを添加してもよい。 Further, the thermoplastic resin forming the girder 11 and the loading plate 12 and the bottom plate 13 described later is provided with a modifier, a pigment or the like for improving flame retardancy, conductivity, wettability, slipperiness, weather resistance and the like. A colorant or the like may be added.

なお、桁１１や後述する載荷板１２および底板１３は、同じ材料で形成されていてもよいが、相互に異なる材料で形成してもよい。 The girder 11, the loading plate 12 and the bottom plate 13 described later may be made of the same material, but may be made of different materials.

２．載荷板１２
本発明に係る組立式パレット１に用いる載荷板１２は、厚板部１２１と、薄板部１２２と、貫通孔１２３と、を有する。 2. Loading plate 12
The loading plate 12 used for the assembled pallet 1 according to the present invention has a thick plate portion 121, a thin plate portion 122, and a through hole 123.

（１）載荷板１２の全体構造
本発明に係る組立式パレット１の載荷板１２として用いることができる板状部材は、特に限定されず、パレットの載荷板に用いることができる一般的な板状部材を自由に選択して用いることができる。本発明では特に、載荷板１２として、中空構造板２を選択することが好ましい。中空構造板２を載荷板１２として用いることにより、強度を保ちつつも、より軽量化を図ることができる。 (1) Overall Structure of Loading Plate 12 The plate-shaped member that can be used as the loading plate 12 of the assembly-type pallet 1 according to the present invention is not particularly limited, and is a general plate-shaped member that can be used as the loading plate of the pallet. Members can be freely selected and used. In the present invention, it is particularly preferable to select the hollow structure plate 2 as the loading plate 12. By using the hollow structure plate 2 as the loading plate 12, it is possible to further reduce the weight while maintaining the strength.

中空構造板２としては、例えば、２枚の表面材２１と、該２枚の表面材の間に配される、立壁により隔てられた中空部２２１が複数形成された中空構造部２２と、を備える中空構造板を挙げることができる。以下、本発明に係る組立式パレットの載荷板１２として用いることができる中空構造板について、図６〜１１に例示して説明する。なお、図４及び後述する図１２、１５〜１８の各実施形態の断面図では、図１０に示す例５の中空構造板を載荷板１２として用いているが、これに限定されず、図６〜１１に例示する他の中空構造板を、本発明の載荷板１２として用いることも可能である。 The hollow structure plate 2 includes, for example, two surface materials 21 and a hollow structure portion 22 arranged between the two surface materials and formed with a plurality of hollow portions 221 separated by a vertical wall. Examples of the hollow structure plate provided. Hereinafter, the hollow structure plate that can be used as the loading plate 12 of the assembly type pallet according to the present invention will be described by way of illustration in FIGS. 6 to 11. In the cross-sectional views of FIGS. 4 and 12, 15 to 18 described later, the hollow structure plate of Example 5 shown in FIG. 10 is used as the loading plate 12, but the present invention is not limited to this, and FIG. It is also possible to use other hollow structural plates exemplified in ~ 11 as the loading plate 12 of the present invention.

ａ．例１及び２
図６の例１及び図７の例２に示す中空構造板２は、一方の面に中空部２２１として中空状の凸部が複数形成されたシートの両面に、表面材２１が積層された構造である。シートの一方の面に形成された凸部の形態は、特に限定されず、自由に設計することができる。例えば、図６の例１に示す円錐台形状、図７の例２に示す円柱形状に限定されず、その他、楕円錐台形状、三角錐台形状、四角錐台形状、五角錐台形状等の多角錐台形状、更には、楕円柱形状、多角柱形状、多角星柱形状、多角星錐台形状など様々な形状に設計することができる。また、これらの形状を組み合わせた形態に設計することもできる。 a. Examples 1 and 2
The hollow structure plate 2 shown in Example 1 of FIG. 6 and Example 2 of FIG. 7 has a structure in which a surface material 21 is laminated on both sides of a sheet in which a plurality of hollow convex portions are formed as hollow portions 221 on one surface. Is. The form of the convex portion formed on one surface of the sheet is not particularly limited and can be freely designed. For example, the shape is not limited to the truncated cone shape shown in Example 1 of FIG. 6 and the cylindrical shape shown in Example 2 of FIG. It can be designed into various shapes such as a polygonal frustum shape, an elliptical pillar shape, a polygonal pillar shape, a polygonal prism shape, and a polygonal frustum shape. It is also possible to design a form in which these shapes are combined.

本発明では、これらの中でも特に、前記凸部を円錐台形状、楕円錐台形状又は多角錐台形状に設計することが好ましい。これにより、製造工程における設計を容易化できることに加え、金型を用いて前記凸部を成形する場合には、金型の製造コストを削減することもできる。 In the present invention, among these, it is particularly preferable to design the convex portion to have a truncated cone shape, an elliptical truncated cone shape, or a polygonal truncated cone shape. As a result, in addition to facilitating the design in the manufacturing process, when the convex portion is molded using the mold, the manufacturing cost of the mold can be reduced.

また、本発明では、前記凸部を円錐台形状又は楕円錐台形状に設計することがより好ましい。これにより、中空構造板２の曲げ剛性を向上させつつ圧縮強度を保持させることができる。 Further, in the present invention, it is more preferable to design the convex portion to have a truncated cone shape or an elliptical truncated cone shape. As a result, the compressive strength can be maintained while improving the bending rigidity of the hollow structure plate 2.

本発明において、前記凸部は、全て同一の形態であってもよいし、２種以上の形態を自由に選択して組み合わせてもよい。また、前記凸部の途中に段差を設けたり、前記凸部の途中にウェーブを設けたりすることも可能である。 In the present invention, the convex portions may all have the same form, or two or more types may be freely selected and combined. It is also possible to provide a step in the middle of the convex portion or to provide a wave in the middle of the convex portion.

前記凸部の配列形態も特に限定されず、例えば、前記凸部を格子状、千鳥状、又は不規則に配列させることができる。なお、本明細書では、千鳥状に配置させることには、所定の基準方向に沿って視たときに、隣接する前記凸部同士が互い違うように配置される状態も含まれるものとする。 The arrangement form of the convex portions is not particularly limited, and for example, the convex portions can be arranged in a grid pattern, a staggered pattern, or irregularly. In the present specification, the staggered arrangement includes a state in which the adjacent convex portions are arranged so as to be staggered when viewed along a predetermined reference direction.

図６の例１に示すように、前記凸部の側壁部をテーパ形状とする場合、そのテーパ角度も特に限定されないが、４５°以上８０°未満とすることが好ましい。４５°以上とすることで中空構造板２の剛性も向上させることができる。また８０°未満とすることにより、中空構造板２を真空成形する際に、凸部（側壁部）のフィルム化を防止して、十分な強度が得ることができる。 As shown in Example 1 of FIG. 6, when the side wall portion of the convex portion has a tapered shape, the taper angle is not particularly limited, but it is preferably 45 ° or more and less than 80 °. The rigidity of the hollow structure plate 2 can also be improved by setting the temperature to 45 ° or more. Further, when the temperature is less than 80 °, when the hollow structure plate 2 is vacuum formed, the convex portion (side wall portion) can be prevented from being formed into a film, and sufficient strength can be obtained.

ｂ．例３
図８の例３に示す中空構造板２は、両面に中空部２２１として中空状の凸部が複数形成されたシートの両面に、表面材２１が積層された構造である。シートの両面に形成された凸部の形態は、前述した例１及び例２と同様に、特に限定されず、自由に設計することができる。具体的な例示及び好適な例は、例１及び例２と同様である。 b. Example 3
The hollow structure plate 2 shown in Example 3 of FIG. 8 has a structure in which a surface material 21 is laminated on both sides of a sheet in which a plurality of hollow convex portions are formed as hollow portions 221 on both sides. The form of the convex portions formed on both sides of the sheet is not particularly limited as in Examples 1 and 2 described above, and can be freely designed. Specific examples and suitable examples are the same as in Example 1 and Example 2.

ｃ．例４
図９の例４に示す中空構造板２は、中空部２２１が相互に隣接した配置されてなるハニカム構造体の上下両面に、表面材２１が積層された構造である。ハニカム構造の形態は、特に限定されず、自由に設計することができる。例えば、図９の例４に示す平面視六角形状に限らず、平面視三角形状や四角形状等の平面視多角形状のハニカム構造体を挙げることができる。 c. Example 4
The hollow structure plate 2 shown in Example 4 of FIG. 9 has a structure in which surface materials 21 are laminated on both upper and lower surfaces of a honeycomb structure in which hollow portions 221 are arranged adjacent to each other. The form of the honeycomb structure is not particularly limited and can be freely designed. For example, not only the hexagonal shape in a plan view shown in Example 4 of FIG. 9, but also a honeycomb structure having a polygonal shape in a plan view such as a triangular shape or a quadrangular shape in a plan view can be mentioned.

ｄ．例５
図１０の例５に示す中空構造板２は、一方の面に中空部２２１として中空状の凸部が複数形成された２枚のシートが、凸部同士を突き合わせた状態で積層し、その両面に表面材２１が積層された構造である。シートの両面に形成された凸部の形態は、前述した例１及び例２と同様に、特に限定されず、自由に設計することができる。具体的な例示及び好適な例は、例１及び例２と同様である。 d. Example 5
In the hollow structure plate 2 shown in Example 5 of FIG. 10, two sheets in which a plurality of hollow convex portions are formed as hollow portions 221 on one surface are laminated in a state where the convex portions are butted against each other, and both sides thereof. The surface material 21 is laminated on the surface material 21. The form of the convex portions formed on both sides of the sheet is not particularly limited as in Examples 1 and 2 described above, and can be freely designed. Specific examples and suitable examples are the same as in Example 1 and Example 2.

ｅ．例６
図１１の例６に示す中空構造板２は、所謂、プラ段である。本発明に係る組立式パレット１の載荷板１２には、従来のプラダン構造からなる中空構造板２を用いることができる。 e. Example 6
The hollow structure plate 2 shown in Example 6 of FIG. 11 is a so-called plastic step. As the loading plate 12 of the assembly type pallet 1 according to the present invention, a hollow structure plate 2 having a conventional corrugated plastic structure can be used.

以上説明した中空構造板２の中でも、本発明では、図６〜１０の例１〜５に示すような、中空部２２１を有するシート（構造体）の両面に、表面材２１が積層された構造の中空構造板２を選択することが好ましい。中空部２２１を有するシート（構造体）の両面に、表面材２１が積層された構造の中空構造板２は、図１１の例６に示すプラ段に比べ、後述する薄板部１２２の強度を強くすることができるからである。また、組立式パレットに載荷してフォークリフトで持ち上げた場合の、載荷板の方向性によるたわみを抑制するために、中空構造板２は略等方性の形状が好ましい。 Among the hollow structure plates 2 described above, in the present invention, as shown in Examples 1 to 5 of FIGS. 6 to 10, the surface material 21 is laminated on both sides of the sheet (structure) having the hollow portion 221. It is preferable to select the hollow structure plate 2. The hollow structure plate 2 having a structure in which the surface material 21 is laminated on both sides of the sheet (structure) having the hollow portion 221 has a stronger strength of the thin plate portion 122 described later than the plastic stage shown in Example 6 of FIG. Because it can be done. Further, the hollow structure plate 2 preferably has a substantially isotropic shape in order to suppress the deflection due to the directionality of the loading plate when the load is loaded on the assembly type pallet and lifted by the forklift.

また、中空部２２１を有するシート（構造体）の両面に、表面材２１が積層された構造の中空構造板２の中でも、本発明では、図１０の例５に示すような、一方の面に中空部２２１として中空状の凸部が複数形成された２枚のシートが、凸部同士を突き合わせた状態で積層し、その両面に表面材２１が積層された構造の中空構造板２を選択することが好ましい。図１０の例５に示す中空構造板２は、凸部同士を突き合わせた面の存在によって、薄板状に押圧加工しても、凸部形状の崩れや強度低下がより抑えられ、桁１１の固定の緩みや外れが生じにくくなるという効果がある。 Further, among the hollow structure plates 2 having a structure in which the surface material 21 is laminated on both sides of the sheet (structure) having the hollow portion 221, in the present invention, on one surface as shown in Example 5 of FIG. Two sheets in which a plurality of hollow convex portions are formed as the hollow portion 221 are laminated in a state where the convex portions are butted against each other, and the hollow structure plate 2 having a structure in which the surface material 21 is laminated on both surfaces thereof is selected. Is preferable. The hollow structure plate 2 shown in Example 5 of FIG. 10 has a surface in which the convex portions are butted against each other, so that even if the convex portions are pressed into a thin plate shape, the convex portion shape is further suppressed from collapsing and the strength is lowered, and the girder 11 is fixed. It has the effect of making it less likely to loosen or come off.

本発明に係る組立式パレット１の載荷板１２として、中空部２２１を有するシート（構造体）の両面に、表面材２１が積層された構造の中空構造板２を用いる場合、中空部２２１を有するシート（構造体）の肉厚は特に限定されないが、０．１ｍｍ以上に設計することが好ましい。中空部２２１を有するシート（構造体）の肉厚を０．１ｍｍ以上とすることにより、座屈等の変形を防ぎ、中空構造板２の形状保持性を高めることができる。 When the hollow structure plate 2 having a structure in which the surface material 21 is laminated on both sides of the sheet (structure) having the hollow portion 221 is used as the loading plate 12 of the assembly type pallet 1 according to the present invention, the hollow portion 221 is provided. The wall thickness of the sheet (structure) is not particularly limited, but it is preferably designed to be 0.1 mm or more. By setting the wall thickness of the sheet (structure) having the hollow portion 221 to 0.1 mm or more, deformation such as buckling can be prevented and the shape retention of the hollow structure plate 2 can be improved.

中空構造板２に用いる材料は、特に限定されず、パレットの載荷板に用いることができる一般的な材料を１種又は２種以上自由に選択して用いることができる。本発明では特に、熱可塑性樹脂を用いることが好ましい。具体的な例示及び好適な例は、前述した桁１１に用いることができる熱可塑性樹脂と同様である。 The material used for the hollow structure plate 2 is not particularly limited, and one or more general materials that can be used for the loading plate of the pallet can be freely selected and used. In the present invention, it is particularly preferable to use a thermoplastic resin. Specific examples and suitable examples are the same as those of the thermoplastic resin that can be used for the above-mentioned girder 11.

本発明に係る組立式パレット１の載荷板１２として、中空部２２１を有するシート（構造体）の両面に、表面材２１が積層された構造の中空構造板２を用いる場合、中空部２２１を有するシート（構造体）と、表面材２１とは、同じ材料で形成されていてもよいが、相互に異なる材料で形成してもよい。 When the hollow structure plate 2 having a structure in which the surface material 21 is laminated on both sides of the sheet (structure) having the hollow portion 221 is used as the loading plate 12 of the assembly type pallet 1 according to the present invention, the hollow portion 221 is provided. The sheet (structure) and the surface material 21 may be formed of the same material, but may be formed of different materials from each other.

中空構造板２の目付けは特に限定されないが、３００〜７０００ｇ／ｍ^２とすることが好ましく、４００〜６０００ｇ／ｍ^２とすることがより好ましい。これにより、中空構造板２の軽量化を図ることができる。 Although the basis weight of the hollow structural plate 2 is not particularly limited and is preferably 300~7000g / ^{m 2,} and more preferably a 400~6000g / ^{m 2.} As a result, the weight of the hollow structure plate 2 can be reduced.

（２）厚板部１２１、薄板部１２２
本発明に係る組立式パレット１の載荷板１２には、厚板部１２１と、薄板部１２２を備えることを特徴とする。薄板部１２２は、厚板部１２１に対してその厚みが薄い部分であり、少なくとも載荷面側が凹んだ部分である。なお、薄板部１２２の非載荷面側は、平坦であっても凹んでいてもよい。この薄板部１２２を、前述した桁１１の挟持部１１１（１１１ａ、１１１ｂ）が挟持することにより、本発明に係る組立式パレット１が組み立てられる。 (2) Thick plate portion 121, thin plate portion 122
The loading plate 12 of the assembly-type pallet 1 according to the present invention is characterized by including a thick plate portion 121 and a thin plate portion 122. The thin plate portion 122 is a portion that is thinner than the thick plate portion 121, and is a portion that is recessed at least on the loading surface side. The non-loading surface side of the thin plate portion 122 may be flat or recessed. The assembled pallet 1 according to the present invention is assembled by sandwiching the thin plate portion 122 by the sandwiching portions 111 (111a, 111b) of the girder 11 described above.

本発明に係る組立式パレット１は、載荷板１２に薄板部１２２を備え、この部分を桁１１の挟持部１１１ａが挟持するため、載荷板１２の載荷面の段差を少なくすることができる。そのため、荷物への段差痕が転写し難く、パレットを積み上げる際の安定性も向上させることができる。 In the assembled pallet 1 according to the present invention, the loading plate 12 is provided with a thin plate portion 122, and the sandwiching portion 111a of the girder 11 sandwiches this portion, so that the step on the loading surface of the loading plate 12 can be reduced. Therefore, it is difficult to transfer the step marks to the luggage, and the stability when stacking the pallets can be improved.

図１２は、本発明に係る組立式パレット１の組立後の第３実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。第３実施形態に係る組立式パレット１は、載荷板１２の薄板部１２２の載荷面１２２ａに、厚板部１２１に連続する厚み勾配を有する。連続する厚み勾配は、直線状でも曲線状でもよい。薄板部１２２の載荷面１２２ａに、厚板部１２１に連続する厚み勾配を備えることで、桁１１への衝撃や振動による載荷板１２の破損や、桁１１の固定の緩みや外れを生じにくくすることができる。 FIG. 12 is a cross-sectional view schematically showing an assembled portion of the girder 11 and the loading plate 12 of the third embodiment after the assembly of the assembled pallet 1 according to the present invention. The assembled pallet 1 according to the third embodiment has a thickness gradient continuous with the thick plate portion 121 on the loading surface 122a of the thin plate portion 122 of the loading plate 12. The continuous thickness gradient may be linear or curved. By providing the loading surface 122a of the thin plate portion 122 with a thickness gradient continuous with the thick plate portion 121, damage to the loading plate 12 due to impact or vibration on the girder 11 and loosening or detachment of the fixing of the girder 11 are less likely to occur. be able to.

本発明に係る組立式パレット１において、載荷板１２の厚板部１２１と薄板部１２２の曲げ弾性勾配は、特に限定されず、目的に応じて自由に設計することができるが、本発明では、厚板部の曲げ弾性勾配／薄板部の最薄部の曲げ弾性勾配を、５．０未満とすることが好ましい。載荷板１２の各部の曲げ弾性勾配をこの範囲に設計することで、衝撃や振動による載荷板１２の変形や破損、桁１１の固定の緩みや外れを生じにくくすることができる。 In the assembled pallet 1 according to the present invention, the bending elastic gradients of the thick plate portion 121 and the thin plate portion 122 of the loading plate 12 are not particularly limited and can be freely designed according to the purpose. The bending elastic gradient of the thick plate portion / the bending elastic gradient of the thinnest portion of the thin plate portion is preferably less than 5.0. By designing the bending elastic gradient of each part of the loading plate 12 within this range, it is possible to prevent the loading plate 12 from being deformed or damaged due to impact or vibration, and the girder 11 from being loosened or detached.

また、載荷板１２の厚板部１２１と薄板部１２２の厚み比が１．１以上３．０以下であることが好ましい。１．１以上とすることで、薄板部１２２において圧縮力がかかっても降伏点がなく、薄板部１２２の更なる圧縮変形が起きるのを防止することができる。３．０以下にすることで、載荷板１２における薄板部１２２の形状保持性を向上させることができる。したがって、本発明に係る組立式パレット１において、載荷板１２の薄板部１２２には、降伏点がない方が好ましい。薄板部１２２が降伏点を有さないことにより、薄板部１２２の更なる圧縮変形を防止することができ、載荷板１２の載荷面に１ｃｍ以上の段差ができるのを防止することができる。 Further, it is preferable that the thickness ratio of the thick plate portion 121 and the thin plate portion 122 of the loading plate 12 is 1.1 or more and 3.0 or less. When it is set to 1.1 or more, there is no yield point even if a compressive force is applied to the thin plate portion 122, and it is possible to prevent further compressive deformation of the thin plate portion 122. By setting the content to 3.0 or less, the shape retention of the thin plate portion 122 on the loading plate 12 can be improved. Therefore, in the assembled pallet 1 according to the present invention, it is preferable that the thin plate portion 122 of the loading plate 12 does not have a yield point. Since the thin plate portion 122 does not have a yield point, it is possible to prevent further compressive deformation of the thin plate portion 122, and it is possible to prevent a step of 1 cm or more from being formed on the loading surface of the loading plate 12.

載荷板１２の薄板部１２２の加工方法は、特に限定されず、従来の加工方法を１種又は２種以上選択して用いることができる。例えば、プレス機に薄板部１２２の形状を模ったスペーサと載荷板１２とを設置して押圧することにより、載荷板１２に薄板部１２２を加工することができる。 The processing method of the thin plate portion 122 of the loading plate 12 is not particularly limited, and one type or two or more types of conventional processing methods can be selected and used. For example, the thin plate portion 122 can be processed on the loading plate 12 by installing and pressing the spacer and the loading plate 12 that imitate the shape of the thin plate portion 122 on the press machine.

（３）貫通孔１２３
貫通孔１２３は、載荷板１２の薄板部１２２に設けられており、本発明に係る組立式パレット１の組立時において、桁１１の挿通部１１２が貫通する部位である。 (3) Through hole 123
The through hole 123 is provided in the thin plate portion 122 of the loading plate 12, and is a portion through which the insertion portion 112 of the girder 11 penetrates when assembling the assembly type pallet 1 according to the present invention.

貫通孔１２３の形態や大きさは、特に限定されず、桁１１の挿通部１１２の形態や大きさ等に応じて自由に設計することができる。本発明では特に、図５に示す第２実施形態のように、挿通部１１２の挿通方向に垂直な断面形状が、多角形状であることが好ましい。多角形状であることで、桁１１の空転を防止することができる。 The form and size of the through hole 123 are not particularly limited, and can be freely designed according to the form and size of the insertion portion 112 of the girder 11. In the present invention, it is particularly preferable that the cross-sectional shape of the insertion portion 112 perpendicular to the insertion direction is a polygonal shape as in the second embodiment shown in FIG. The polygonal shape can prevent the girder 11 from slipping.

載荷板１２の貫通孔１２３の加工方法は、特に限定されず、従来の加工方法を１種又は２種以上選択して用いることができる。例えば、ルータ（電動工具）によって切削する方法、プレス機に貫通孔１２３形状を模ったトムソン刃と載荷板を設置して押圧してくり抜く方法等を用いて、載荷板１２に貫通孔１２３を加工することができる。また、貫通孔１２３形状を模ったトムソン刃と薄板部１２２の形状を模ったスペーサの一体の型でプレス機にて押圧して、薄板部１２２と貫通孔１２３を同時に加工することもできる。 The processing method of the through hole 123 of the loading plate 12 is not particularly limited, and one or more conventional processing methods can be selected and used. For example, a through hole 123 is formed in the loading plate 12 by using a method of cutting with a router (power tool), a method of installing a Thomson blade and a loading plate imitating the shape of the through hole 123 in a press machine, and pressing and hollowing out. Can be processed. Further, the thin plate portion 122 and the through hole 123 can be machined at the same time by pressing with a press machine with an integrated mold of a Thomson blade imitating the shape of the through hole 123 and a spacer imitating the shape of the thin plate portion 122. ..

以上説明した載荷板１２の厚さは特に限定されず、目的に応じて自由に設計することができるが、断面二次モーメントの一般式より、厚さが厚い方が、曲げ剛性が大きくなるため、パレット用途として好ましい。 The thickness of the loading plate 12 described above is not particularly limited and can be freely designed according to the purpose. However, the thicker the thickness, the greater the bending rigidity than the general formula of the moment of inertia of area. , Preferable for pallet applications.

載荷板１２の表面には、金属等の異種材料からなるシートを貼り合わせても良い。また、載荷板１２の載荷面には、滑り止め防止や意匠性を付与するために、凹凸加工等を施しても良い。 A sheet made of a different material such as metal may be attached to the surface of the loading plate 12. Further, the loading surface of the loading plate 12 may be subjected to uneven processing or the like in order to prevent slipping and impart designability.

３．底板１３
本発明に係る組立式パレット１には、図１３〜１６の第４実施形態に示すように、底板１３を備えることもできる。図１３は、本発明に係る組立式パレット１の組立後の第４実施形態の全体構造を模式的に示す斜視図であり、図１４は、本発明に係る組立式パレット１の組立前の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す分解斜視図であり、図１５は、本発明に係る組立式パレット１の組立後の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す斜視図であり、図１６は、本発明に係る組立式パレット１の組立後の第４実施形態の桁１１と載荷板１２との組立部を模式的に示す断面図である。 3. 3. Bottom plate 13
As shown in the fourth embodiment of FIGS. 13 to 16, the assembled pallet 1 according to the present invention may be provided with a bottom plate 13. FIG. 13 is a perspective view schematically showing the overall structure of the fourth embodiment after the assembly of the assembling pallet 1 according to the present invention, and FIG. 14 is a first view before assembling the assembling pallet 1 according to the present invention. 4 is an exploded perspective view schematically showing an assembled portion of the girder 11 and the loading plate 12 of the fourth embodiment, and FIG. 15 shows the girder 11 and the loading of the fourth embodiment after the assembly type pallet 1 according to the present invention. FIG. 16 is a perspective view schematically showing an assembly part with the plate 12, and FIG. 16 is a schematic view of the assembly part between the girder 11 and the loading plate 12 of the fourth embodiment after the assembly of the assembly type pallet 1 according to the present invention. It is a cross-sectional view shown in.

本発明に係る組立式パレット１に、底板１３を取り付けることで、載荷したパレット１を段積みした際に、荷の安定性が増して、荷の落下を防止することができる。また、桁１１への荷重の集中による下段荷物への損傷等を防止することができる。更に、載荷してフォークリフトで持ち上げた場合、載荷板１２に働く引張の作用と底板１３に働く圧縮の作用で曲げ剛性が上がってたわみが抑制され、積載可能荷重を上げることができる。 By attaching the bottom plate 13 to the assembled pallet 1 according to the present invention, the stability of the load is increased and the load can be prevented from falling when the loaded pallets 1 are stacked. Further, it is possible to prevent damage to the lower luggage due to the concentration of the load on the girder 11. Further, when the load is loaded and lifted by a forklift, the bending rigidity is increased by the action of tension acting on the loading plate 12 and the action of compression acting on the bottom plate 13, and the deflection can be suppressed, so that the loadable load can be increased.

本発明に係る組立式パレット１に用いる底板１３は、厚板部１３１と、薄板部１３２と、貫通孔１３３と、を有する。本発明に係る組立式パレット１は、底板１３に薄板部１３２を備え、この部分を桁１１の挟持部１１１（１１１ｃ、１１１ｄ）が挟持するため、底面の段差を少なくすることができる。そのため、載荷したパレット１を段積みした際に、荷の安定性が増して、荷の落下を防止することができる。また、荷重の集中による下段荷物への損傷等を防止することができる。 The bottom plate 13 used for the assembly type pallet 1 according to the present invention has a thick plate portion 131, a thin plate portion 132, and a through hole 133. In the assembly type pallet 1 according to the present invention, the bottom plate 13 is provided with a thin plate portion 132, and the sandwiching portions 111 (111c, 111d) of the girder 11 sandwich this portion, so that the step on the bottom surface can be reduced. Therefore, when the loaded pallets 1 are stacked, the stability of the load is increased and the load can be prevented from falling. In addition, it is possible to prevent damage to the lower luggage due to concentration of load.

底板１３の厚板部１３１、薄板部１３２及び貫通孔１３３の具体的構造や好適な例については、載荷板１２の厚板部１２１、薄板部１２２及び貫通孔１２３と同様である。 The specific structure and suitable examples of the thick plate portion 131, the thin plate portion 132, and the through hole 133 of the bottom plate 13 are the same as those of the thick plate portion 121, the thin plate portion 122, and the through hole 123 of the loading plate 12.

４．組み立て構造
本発明に係る組立式パレット１の組み立て構造について、以下、各実施形態を例示しながら説明する。 4. Assembly structure The assembly structure of the assembly type pallet 1 according to the present invention will be described below with reference to each embodiment.

（１）第１〜３実施形態
図２〜４に示す第１実施形態、図５に示す第２実施形態及び図１２に示す第３実施形態に係る組立式パレット１の桁１１は、載荷面１２２ａ側に配置される挟持部１１１ａと挿通部１１２とが予め連設されている。また、非載荷面１２ｂ側に配置される挟持部１１１ｂと桁本体１１３とが予め連設されており、挟持部１１１ｂと桁本体１１３には、挿通部１１２が挿通可能な孔Ｈが備えられている。更に、挿通部１１２ａには雄型の係止部１１４が、桁本体１１３には雌型の係止部１１４が、各々一対の係止部１１４を成すように、複数（図４の断面図では２つ）備えられている。 (1) First to Third Embodiments The girder 11 of the assembly type pallet 1 according to the first embodiment shown in FIGS. 2 to 4, the second embodiment shown in FIG. 5, and the third embodiment shown in FIG. 12 has a loading surface. The sandwiching portion 111a and the insertion portion 112 arranged on the 122a side are connected in advance. Further, the holding portion 111b and the girder main body 113 arranged on the non-loading surface 12b side are connected in advance, and the holding portion 111b and the girder main body 113 are provided with a hole H through which the insertion portion 112 can be inserted. There is. Further, a plurality of male locking portions 114 are formed in the insertion portion 112a, and a female locking portion 114 is formed in the girder body 113 so as to form a pair of locking portions 114 (in the cross-sectional view of FIG. 4). Two) are provided.

第１〜３実施形態に係る組立式パレット１は、桁１１と載荷板１２とを組み立てる際、挟持部１１１ａと挟持部１１１ｂとが載荷板１２の薄板部１２２を挟持した状態で、挿通部１１２の一部が、載荷板１２の貫通孔１２３及び挟持部１１１ｂと桁本体１１３に備えられた孔Ｈに挿通し、一対の係止部１１４が嵌合することにより固定される。 In the assembly type pallet 1 according to the first to third embodiments, when the girder 11 and the loading plate 12 are assembled, the insertion portion 112 is in a state where the sandwiching portion 111a and the sandwiching portion 111b sandwich the thin plate portion 122 of the loading plate 12. Is inserted into the through hole 123 and the holding portion 111b of the loading plate 12 and the hole H provided in the girder body 113, and the pair of locking portions 114 are fitted to each other to be fixed.

このように、本発明に係る組立式パレット１は、接着剤、ネジ、釘等を必要とせず、また、溶着等を行うこともなく、組立及び分解が可能である。なお、本実施形態では、挿通部１１２の係止部１１４を雄型、桁本体１１３の係止部１１４を雌型として例示しているが、これに限定されない。挿通部１１２の係止部１１４を雌型、桁本体１１３の係止部１１４を雄型としてもよいし、他の一般的に用いられる係止構造を自由に選択して用いることも可能である（以下同様）。 As described above, the assembly type pallet 1 according to the present invention does not require an adhesive, screws, nails, etc., and can be assembled and disassembled without performing welding or the like. In the present embodiment, the locking portion 114 of the insertion portion 112 is illustrated as a male type, and the locking portion 114 of the girder body 113 is illustrated as a female type, but the present invention is not limited to this. The locking portion 114 of the insertion portion 112 may be a female type, the locking portion 114 of the girder body 113 may be a male type, or another commonly used locking structure may be freely selected and used. (Same below).

第１〜３実施形態に係る組立式パレット１では、挿通部１１２の一部が、載荷板１２の貫通孔１２３及び挟持部１１１ｂと桁本体１１３に備えられた孔Ｈに挿通した状態で固定される。このように、挿通部１１２の一部が桁本体１１３まで挿通された状態で固定されることにより、より強固に固定することができ、衝撃や振動による桁１１の固定の緩みや外れを生じにくくすることができる。 In the assembled pallet 1 according to the first to third embodiments, a part of the insertion portion 112 is fixed in a state of being inserted into the through hole 123 and the holding portion 111b of the loading plate 12 and the hole H provided in the girder body 113. To. In this way, by fixing a part of the insertion portion 112 in a state where it is inserted to the girder body 113, it can be fixed more firmly, and the girder 11 is less likely to loosen or come off due to impact or vibration. can do.

（２）第４実施形態
図１３〜１６に示す第４実施形態に係る組立式パレット１は、桁１１と、載荷板１２と、底板１３とを備え、桁１１には、載荷板１２と底板１３とを固定するために、一対の挟持部１１１と挿通部１１２が、それぞれ２つ備えられている例である。 (2) Fourth Embodiment The assembly-type pallet 1 according to the fourth embodiment shown in FIGS. 13 to 16 includes a girder 11, a loading plate 12, and a bottom plate 13, and the girder 11 includes a loading plate 12 and a bottom plate. This is an example in which two pairs of sandwiching portions 111 and two insertion portions 112 are provided in order to fix the 13 and the like.

底板１３の底面１３２ａ側に配置される挟持部１１１ｄと挿通部１１２ｂとが予め連設されている。また、上面１３ｂ側に配置される挟持部１１１ｃと桁本体１１３とが予め連設されており、挟持部１１１ｃと桁本体１１３には、挿通部１１２ｂが挿通可能な孔Ｈが備えられている。更に、挿通部１１２ｂには雄型の係止部１１４が、桁本体１１３には雌型の係止部１１４が、各々一対の係止部１１４を成すように、複数（図１６の断面図では２つ）備えられている。その他の構造については、前述した第１〜３実施形態に係る組立式パレット１と同様である。 A holding portion 111d and an insertion portion 112b arranged on the bottom surface 132a side of the bottom plate 13 are connected in advance. Further, the holding portion 111c and the girder main body 113 arranged on the upper surface 13b side are connected in advance, and the holding portion 111c and the girder main body 113 are provided with a hole H through which the insertion portion 112b can be inserted. Further, a male locking portion 114 is formed in the insertion portion 112b, and a female locking portion 114 is formed in the girder main body 113 so as to form a pair of locking portions 114 (in the cross-sectional view of FIG. 16). Two) are provided. Other structures are the same as those of the assembled pallet 1 according to the first to third embodiments described above.

第４実施形態に係る組立式パレット１において、桁１１と載荷板１２とを組み立てる際の固定方法は、前述した第１〜３実施形態に係る組立式パレット１と同様である。第４実施形態に係る組立式パレット１は、桁１１と底板１３とを組み立てる際、挟持部１１１ｃと挟持部１１１ｄとが底板１３の薄板部１３２を挟持した状態で、挿通部１１２ｂが、挟持部１１１ｃと桁本体１１３に備えられた孔Ｈに挿通し、一対の係止部１１４が嵌合することにより固定される。 In the assembled pallet 1 according to the fourth embodiment, the fixing method when assembling the girder 11 and the loading plate 12 is the same as the assembled pallet 1 according to the first to third embodiments described above. In the assembly type pallet 1 according to the fourth embodiment, when the girder 11 and the bottom plate 13 are assembled, the insertion portion 112b holds the sandwiching portion 112b in a state where the sandwiching portion 111c and the sandwiching portion 111d sandwich the thin plate portion 132 of the bottom plate 13. It is fixed by inserting it into the hole H provided in the 111c and the girder body 113 and fitting the pair of locking portions 114.

（３）第５実施形態
図１７に示す第５実施形態に係る組立式パレット１の桁１１は、非載荷面１２ｂ側に配置される挟持部１１１ｂに、挿通部１１２及び桁本体１１３が予め連設されている。そして、載荷面１２２ａ側に配置される挟持部１１１ａと挿通部１１２には、一対の係止部１１４が複数（図１７の断面図では２つ）備えられている。 (3) Fifth Embodiment In the girder 11 of the assembly type pallet 1 according to the fifth embodiment shown in FIG. 17, the insertion portion 112 and the girder main body 113 are connected in advance to the holding portion 111b arranged on the non-loading surface 12b side. It is installed. The sandwiching portion 111a and the insertion portion 112 arranged on the loading surface 122a side are provided with a plurality of a pair of locking portions 114 (two in the cross-sectional view of FIG. 17).

第５実施形態に係る組立式パレット１は、桁１１と後述する載荷板１２とを組み立てる際、挟持部１１１ａと挟持部１１１ｂとが載荷板１２の薄板部１２２を挟持した状態で、挟持部１１１ａと挿通部１１２に備えられた一対の係止部１１４が嵌合することにより固定される。 In the assembly type pallet 1 according to the fifth embodiment, when the girder 11 and the loading plate 12 described later are assembled, the sandwiching portion 111a and the sandwiching portion 111b sandwich the thin plate portion 122 of the loading plate 12, and the sandwiching portion 111a And the pair of locking portions 114 provided on the insertion portion 112 are fitted and fixed.

（４）第６実施形態
図１８に示す第６実施形態に係る組立式パレット１の桁１１は、非載荷面１２ｂ側に配置される挟持部１１１ｂと桁本体１１３とが予め連設されており、載荷面１２２ａ側に配置される挟持部１１１ａと、挿通部１１２とが、それぞれ分解可能な構造を呈している。そして、載荷面１２２ａ側に配置される挟持部１１１ａと挿通部１１２、及び、非載荷面１２ｂ側に配置される挟持部１１１ｂには、一対の係止部１１４が（図１８の断面図では２つずつ）備えられている。 (4) Sixth Embodiment In the girder 11 of the assembly type pallet 1 according to the sixth embodiment shown in FIG. 18, a holding portion 111b arranged on the non-loading surface 12b side and a girder main body 113 are connected in advance. The holding portion 111a arranged on the loading surface 122a side and the insertion portion 112 each exhibit a structure that can be disassembled. A pair of locking portions 114 are provided on the sandwiching portion 111a and the insertion portion 112 arranged on the loading surface 122a side and the sandwiching portion 111b arranged on the non-loading surface 12b side (2 in the cross-sectional view of FIG. 18). (Each) is provided.

第６実施形態に係る組立式パレット１は、桁１１と後述する載荷板１２とを組み立てる際、挟持部１１１ａと挟持部１１１ｂとが載荷板１２の薄板部１２２を挟持した状態で、挟持部１１１ａと挿通部１１２と挟持部１１１ｂとにそれぞれ備えられた一対の係止部１１４が嵌合することにより固定される。 In the assembly type pallet 1 according to the sixth embodiment, when the girder 11 and the loading plate 12 described later are assembled, the sandwiching portion 111a and the sandwiching portion 111b sandwich the thin plate portion 122 of the loading plate 12, and the sandwiching portion 111a And the pair of locking portions 114 provided on the insertion portion 112 and the sandwiching portion 111b are fixed by fitting.

以下、実施例に基づいて本発明を更に詳細に説明する。なお、以下に説明する実施例は、本発明の代表的な実施例の一例を示したものであり、これにより本発明の範囲が狭く解釈されることはない。 Hereinafter, the present invention will be described in more detail based on Examples. It should be noted that the examples described below show an example of a typical example of the present invention, and the scope of the present invention is not narrowly interpreted by this.

＜実験例１＞
実験例１では、様々な形態の中空構造板を載荷板に用いて、本発明に係る組立式パレットを作製した。サンプル１〜６は、それぞれ図６〜図１１に示す例１〜６の中空構造板を載荷板として用いた。サンプル１〜６の桁は、図１３〜１６の第４実施形態で例示した桁を用いた。 <Experimental example 1>
In Experimental Example 1, various forms of hollow structural plates were used as loading plates to prepare an assembly-type pallet according to the present invention. For samples 1 to 6, the hollow structural plates of Examples 1 to 6 shown in FIGS. 6 to 11 were used as the loading plates, respectively. As the digits of the samples 1 to 6, the digits exemplified in the fourth embodiment of FIGS. 13 to 16 were used.

（１）サンプル１〜６の組立式パレットの作製
図６〜図１１に示す例１〜６の中空構造板と、薄板部の形状を模った断面が厚み勾配を有するスペーサを準備した。そして室温にて中空構造板を２００ｔプレス機に設置した後、中空構造板の上にスペーサを載せてプレス下降速度：２ｍｍ／秒にて押圧することにより、図６〜図１１に示す例１〜６の中空構造板から成るそれぞれの載荷板に、薄板部を加工した。 (1) Preparation of Assembled Pallets for Samples 1 to 6 The hollow structural plates of Examples 1 to 6 shown in FIGS. 6 to 11 and spacers having a thickness gradient in cross section imitating the shape of the thin plate portion were prepared. Then, after installing the hollow structure plate in a 200t press machine at room temperature, a spacer is placed on the hollow structure plate and pressed at a press lowering speed of 2 mm / sec, so that Examples 1 to 2 shown in FIGS. A thin plate portion was processed on each loading plate composed of the hollow structural plates of 6.

次に、室温にて貫通孔形状を模ったトムソン刃をベニヤ板に取り付けたベニヤ型を２００ｔプレス機に設置した後、ベニヤ型の上に薄板部を加工したそれぞれの載荷板を載せ、更にその上にトムソン刃保護用ポリプロピレン製の当て板を載せてプレス下降速度：２ｍｍ／秒にて押圧して繰り抜くことにより、サンプル１〜６の載荷板に、貫通孔を加工した。 Next, after installing a veneer mold with a Thomson blade imitating the shape of a through hole on a veneer plate at room temperature on a 200t press machine, each loading plate with a thin plate part processed is placed on the veneer mold, and further, the loading plate is placed on the veneer mold. A through hole was formed in the loading plate of Samples 1 to 6 by placing a polypropylene backing plate for protecting the Thomson blade on the plate and pressing it at a press lowering speed of 2 mm / sec to pull it out.

（２）各種物性測定
前記で作製したサンプル１〜６の載荷板について、厚板部と薄板部の厚み、曲げ強力、曲げ弾性勾配、平板圧強度を、下記に示す方法で、それぞれ測定した。 (2) Measurement of Various Physical Properties With respect to the loading plates of Samples 1 to 6 prepared above, the thickness, bending strength, bending elastic gradient, and plate pressure strength of the thick plate portion and the thin plate portion were measured by the methods shown below, respectively.

ａ．曲げ強力、曲げ弾性勾配
曲げ強力、曲げ弾性勾配は、ＪＩＳＫ７１７１を参考に、インストロン社製の万能試験機を用いて曲げ試験（３点曲げ試験）を実施して求めた。５０×１５０ｍｍにカットした試験片を支点間距離１００ｍｍで、その中央部に２０ｍｍ／ｍｉｎの速度で荷重を加えて、曲げ応力の増加がなくなる降伏点応力を曲げ強力とした。また、この曲げ試験により得られた荷重−撓み曲線の直線部分から１ｃｍ撓んだ時の荷重を求めて、これを曲げ弾性勾配とした。 a. Bending strength and bending elastic gradient The bending strength and bending elastic gradient were determined by conducting a bending test (three-point bending test) using a universal testing machine manufactured by Instron with reference to JIS K 7171. A test piece cut to 50 × 150 mm was applied with a load at a speed of 20 mm / min at a distance of 100 mm between fulcrums, and the yield point stress at which the increase in bending stress disappeared was made strong. Further, the load when the load-deflection curve obtained by this bending test was bent by 1 cm was obtained from the straight line portion, and this was used as the bending elastic gradient.

ｂ．平板圧縮強度
平板圧縮強度は、ＪＩＳＫ７１８１を参考に、インストロン社製の万能試験機を用いて圧縮試験を実施して求めた。７０×７０ｍｍにカットした試験片を２枚の平行板面に挟み、５ｍｍ／ｍｉｎの速度で荷重を加えて、圧縮応力の増加がなくなる降伏点圧縮力を試験片の初期断面積で除した値である。 b. Flat plate compression strength The flat plate compression strength was determined by conducting a compression test using a universal testing machine manufactured by Instron with reference to JIS K 7181. A test piece cut to 70 x 70 mm is sandwiched between two parallel plate surfaces, a load is applied at a speed of 5 mm / min, and the yield point where the increase in compressive stress disappears. The compressive force divided by the initial cross-sectional area of the test piece. Is.

（３）各種評価試験
サンプル１〜６について、それぞれ、載荷板と桁とを組み立て、パレットを作製し、下記の方法に従って、落下衝撃試験及び載荷面側の平面度を測定した。 (3) Various evaluation tests For each of Samples 1 to 6, a loading plate and a girder were assembled to prepare a pallet, and a drop impact test and flatness on the loading surface side were measured according to the following methods.

ａ．落下衝撃試験
サンプル１〜６のパレットを、１ｍの高さから３回落下させて、桁が外れるか否かを観察した。下記の評価に従って、各サンプルを評価した。
◎：桁が外れることがなく、桁の緩みも全く生じない。
○：桁が外れることがなく、桁の緩みもほとんどない。
△：桁が外れることはないが、桁の緩みは生じることがある。
×：桁が外れる。 a. Drop Impact Test The pallets of Samples 1 to 6 were dropped from a height of 1 m three times, and it was observed whether or not the girder came off. Each sample was evaluated according to the evaluation below.
⊚: The girder does not come off and the girder does not loosen at all.
◯: The girder does not come off and there is almost no looseness of the girder.
Δ: The girder does not come off, but the girder may loosen.
X: The digit is off.

ｂ．平面度
サンプル１〜６のパレットについて、載荷板の厚板部上面と、桁の挟持部上面との段差を測定した。具体的には、圧板部上面か桁の挟持部上面のどちらか出っ張っている方に定規を当てて、出っ張っていない方と定規との間の隙間距離を測定した。 b. Flatness For the pallets of Samples 1 to 6, the step between the upper surface of the thick plate portion of the loading plate and the upper surface of the holding portion of the girder was measured. Specifically, a ruler was applied to either the upper surface of the pressure plate portion or the upper surface of the holding portion of the girder, and the gap distance between the non-protruding portion and the ruler was measured.

（４）結果
結果を下記表１に示す。 (4) Results The results are shown in Table 1 below.

なお、表中、「ＰＰ」とは、ポリプロピレンブロックコポリマーを示す（以下同様）。

In the table, "PP" indicates a polypropylene block copolymer (the same applies hereinafter).

（５）考察
表１に示すように、サンプル１〜６の組立式パレットは、落下試験において、桁が外れることがなく、接着剤や溶着等の固定方法を用いずに、載荷板と桁とを組み立てることが可能であるにも関わらず、十分な強度を示すことが分かった。 (5) Discussion As shown in Table 1, the prefabricated pallets of Samples 1 to 6 did not come off the girder in the drop test, and the loading plate and girder did not use a fixing method such as adhesive or welding. Although it is possible to assemble, it was found to show sufficient strength.

また、サンプル１〜６の組立式パレットの載荷面は、ほぼ平坦であり、荷物への段差痕が転写し難く、パレットを積み上げる際の安定性も高いことが分かった。 Further, it was found that the loading surface of the assembled pallets of Samples 1 to 6 was almost flat, the step marks on the luggage were hard to be transferred, and the stability when stacking the pallets was high.

サンプル１〜６内で比較すると、載荷板として図１１の例６に示す従来のプラ段を用いたサンプル６に比べて、図６〜１０の例１〜５に示す、中空部を有するシート（構造体）の両面に、表面材が積層された構造の中空構造板を用いたサンプル１〜５の方が、落下衝撃試験及び平面度のいずれも優れていた。サンプル６の載荷板の厚板部の曲げ弾性勾配／薄板部の最薄部の曲げ弾性勾配が、ＭＤ及びＴＤ共に５．０以上であったことから、厚板部の曲げ弾性勾配／薄板部の最薄部の曲げ弾性勾配を、５．０未満とすることで、衝撃や振動による載荷板１２の変形や破損、桁１１の固定の緩みや外れを生じにくくすることができることが分かった。 Comparing the samples 1 to 6, the sheet having a hollow portion shown in Examples 1 to 5 of FIGS. 6 to 10 is compared with the sample 6 using the conventional plastic corrugated plastic shown in Example 6 of FIG. 11 as the loading plate. Samples 1 to 5 using a hollow structure plate having a structure in which surface materials are laminated on both sides of the structure) were superior in both the drop impact test and the flatness. Since the bending elastic gradient of the thick plate portion of the loading plate of Sample 6 / the bending elastic gradient of the thinnest portion of the thin plate portion was 5.0 or more for both MD and TD, the bending elastic gradient of the thick plate portion / the thin plate portion It was found that by setting the bending elastic gradient of the thinnest portion of the above to less than 5.0, it is possible to prevent deformation or breakage of the loading plate 12 due to impact or vibration, and loosening or detachment of the fixing of the girder 11.

また、サンプル１〜５の中では、一方の面に中空部として中空状の凸部が複数形成された２枚のシートが、凸部同士を突き合わせた状態で積層し、その両面に表面材が積層された構造の中空構造板を、載荷板として用いたサンプル５の落下衝撃試験が、一番優れていた。この結果から、凸部同士を突き合わせた面の存在によって、薄板状に押圧加工しても、凸部形状の崩れや強度低下がより抑えられ、桁の固定の緩みや外れが生じにくくなることが分かった。 Further, in Samples 1 to 5, two sheets in which a plurality of hollow convex portions are formed as hollow portions on one surface are laminated in a state where the convex portions are butted against each other, and surface materials are formed on both surfaces thereof. The drop impact test of the sample 5 using the hollow structure plate having a laminated structure as a loading plate was the most excellent. From this result, due to the existence of the surfaces in which the convex portions are butted against each other, even if the convex portions are pressed into a thin plate shape, the collapse of the convex portion shape and the decrease in strength are further suppressed, and the girder is less likely to be loosened or detached. Do you get it.

＜実験例２＞
実験例２では、底板の有無による効果について検討した。具体的には、前記実験例１のサンプル５と、該サンプル５の組立式パレットに、底板として載荷板と同じ図１０に示す例５の中空構造板を用いたサンプル７と、について、たわみ量を測定した。なお、桁は、図１３〜１６の第４実施形態で例示した桁を用いた。 <Experimental example 2>
In Experimental Example 2, the effect of the presence or absence of the bottom plate was examined. Specifically, the amount of deflection of the sample 5 of the experimental example 1 and the sample 7 using the hollow structure plate of the example 5 shown in FIG. 10 which is the same as the loading plate as the bottom plate on the assembly type pallet of the sample 5. Was measured. As the girder, the girder illustrated in the fourth embodiment of FIGS. 13 to 16 was used.

（１）サンプル５及び７の組立式パレットの作製
前記実験例１と同様の方法で、載荷板及び底板を作製した。 (1) Preparation of Assembled Pallets of Samples 5 and 7 A loading plate and a bottom plate were prepared in the same manner as in Experimental Example 1.

（２）たわみ量の測定
サンプル５及び７について、それぞれ、１１００×１１００ｍｍの載荷板と桁とを組み立て、パレットを作製し、載荷面に、２７５×５５０ｍｍで重量２５ｋｇの箱を８個並べ、フォークリフトで持ち上げたときの、載荷板中央と端の床からの高さの差を測定した。 (2) Measurement of the amount of deflection For samples 5 and 7, a loading plate of 1100 x 1100 mm and a girder were assembled to prepare a pallet, and eight boxes measuring 275 x 550 mm and weighing 25 kg were arranged on the loading surface, and a forklift was used. The difference in height from the floor at the center and the edge of the loading plate when lifted with was measured.

（３）結果
結果を下記表２に示す。 (3) Results The results are shown in Table 2 below.

（４）考察
表２に示す通り、底板の無いサンプル５に比べ、底板を備えたサンプル７の方が、たわみ量が小さいことが分かった。この結果から、本発明に係る組立式パレットに、底板を取り付けることで、載荷してフォークリフトで持ち上げた場合、載荷板に働く引張の作用と底板に働く圧縮の作用で曲げ剛性が上がってたわみが抑制され、積載可能荷重を上げることができることが分かった。 (4) Discussion As shown in Table 2, it was found that the amount of deflection of the sample 7 with the bottom plate was smaller than that of the sample 5 without the bottom plate. From this result, when the bottom plate is attached to the prefabricated pallet according to the present invention, when the pallet is loaded and lifted by a forklift, the bending rigidity is increased by the tensile action acting on the loading plate and the compressive action acting on the bottom plate. It was found that it was suppressed and the loadable load could be increased.

＜実験例３＞
実験例３では、薄板部と厚板部との形態が、連続的か否かによる効果の違いについて検討した。具体的には、薄板部に、厚板部に連続する厚み勾配を有するサンプル５（図１２の断面図参照）と、薄板部と厚板部とが非連続的であるサンプル８（図４の断面図参照）と、について、落下衝撃試験を行なった。 <Experimental example 3>
In Experimental Example 3, the difference in effect depending on whether or not the morphology of the thin plate portion and the thick plate portion is continuous was examined. Specifically, the sample 5 having a thickness gradient continuous with the thick plate portion in the thin plate portion (see the cross-sectional view of FIG. 12) and the sample 8 in which the thin plate portion and the thick plate portion are discontinuous (FIG. 4). A drop impact test was conducted on (see cross-sectional view).

（１）サンプル５の組立式パレットの作製
前記実験例１と同様の方法で、サンプル５の載荷板を作製した。 (1) Preparation of Assembled Pallet of Sample 5 A loading plate of Sample 5 was prepared in the same manner as in Experimental Example 1.

（２）サンプル８の組立式パレットの作製
図１０に示す例５の中空構造板と、薄板部の形状を模ったスペーサと、その外周に切り込み用のトムソン刃を配置したベニヤ型を準備した。そして前記ベニヤ型を２００ｔプレス機に設置した後、前記ベニヤ型の上に中空構造板を載せて、室温でプレス下降速度：２ｍｍ／秒にて押圧することにより、載荷板に非連続な薄板部を加工した。 (2) Preparation of Assembled Pallet of Sample 8 A veneer mold having a hollow structure plate of Example 5 shown in FIG. 10, a spacer imitating the shape of a thin plate portion, and a Thomson blade for cutting was prepared on the outer periphery thereof. .. Then, after installing the veneer mold in a 200t press machine, a hollow structure plate is placed on the veneer mold and pressed at room temperature at a press lowering speed of 2 mm / sec, whereby a thin plate portion discontinuous to the loading plate is formed. Was processed.

貫通孔形状を模ったトムソン刃をベニヤ板に取り付けたベニヤ型を２００ｔプレス機に設置した後、ベニヤ型の上に薄板部を加工した載荷板を載せ、更にその上にトムソン刃保護用熱可塑性樹脂性ポリプロピレン製の当て板を載せてプレス下降速度：２ｍｍ／秒にて押圧して繰り抜くことにより、サンプル８の載荷板に、貫通孔を加工した。 After installing a veneer mold with a Thomson blade that imitates the shape of a through hole on a veneer plate on a 200t press machine, a loading plate with a processed thin plate is placed on the veneer mold, and then a thermoplastic for protecting the Thomson blade is placed on it. A through hole was formed in the loading plate of sample 8 by placing a backing plate made of resin polypropylene and pressing it at a press descent speed of 2 mm / sec to punch it out.

（３）落下衝撃試験
サンプル５及び８について、前記実験例１と同様の方法で、落下衝撃試験を行なった。 (3) Drop Impact Test Samples 5 and 8 were subjected to a drop impact test in the same manner as in Experimental Example 1.

（４）結果
結果を下記表３に示す。 (4) Results The results are shown in Table 3 below.

（５）考察
表３に示す通り、薄板部と厚板部とが非連続的であるサンプル８に比べ、薄板部に、厚板部に連続する厚み勾配を有するサンプル５の方が、落下衝撃試験の結果が優れていた。この結果から、載荷板の薄板部に、厚板部に連続する厚み勾配を備えることで、桁への衝撃や振動による載荷板の破損や、桁の固定の緩みや外れを生じにくくすることができることが分かった。 (5) Consideration As shown in Table 3, the drop impact of the sample 5 having a thickness gradient continuous with the thick plate portion in the thin plate portion is higher than that of the sample 8 in which the thin plate portion and the thick plate portion are discontinuous. The test results were excellent. From this result, by providing the thin plate portion of the loading plate with a thickness gradient continuous with the thick plate portion, it is possible to prevent the loading plate from being damaged due to impact or vibration on the girder, and to prevent the girder from being loosened or detached. I found that I could do it.

１：組立式パレット
１１：桁
１２：載荷板
１３：底板
１１１：挟持部
１１２：挿通部
１１３：桁本体
１１４：係止部
１２１、１３１：厚板部
１２２、１３２：薄板部
１２３、１３３：貫通孔
２：中空構造体
２１：表面材
２２：中空構造部
２２１：中空部 1: Assembled pallet 11: Girder 12: Loading plate 13: Bottom plate 111: Holding portion 112: Inserting portion 113: Girder body 114: Locking portion 121, 131: Thick plate portion 122, 132: Thin plate portion 123, 133: Penetration Hole 2: Hollow structure 21: Surface material 22: Hollow structure 221: Hollow part

Claims

An assembly-type pallet having a girder made of a plurality of thermoplastic resins and a loading plate made of a thermoplastic resin to which the girder is detachably provided.
The load plate described above has a thick plate portion, a thin plate portion having at least a recessed loading surface side, and a through hole provided in the thin plate portion.
The girder has a pair of holding portions for sandwiching the thin plate portion of the previously described load plate at the time of assembly, an insertion portion penetrating the through hole of the previously described load plate at the time of assembly, and a girder main body.
At the time of assembly
The thin plate portion of the load plate described above is sandwiched by the pair of sandwiching portions of the girder, and the load plate described above and the girder are fixed.
The loading surface of the thin plate portion has a thickness gradient continuous with the thick plate portion.
An assembly-type pallet in which the bending elastic gradient of the thick plate portion / the bending elastic gradient of the thinnest portion of the thin plate portion is less than 5.0.

The insertion portion of the girder and the girder body have at least a pair of locking portions.
The assembly formula according to claim 1 , wherein the loading plate and the girder are fixed by fitting the locking portion of the insertion portion and the locking portion of the girder body at the time of assembly. palette.

An assembly-type pallet having a girder made of a plurality of thermoplastic resins, a loading plate made of a thermoplastic resin to which the girder is detachably provided, and a bottom plate made of a thermoplastic resin to which the girder is detachably provided. hand,
The load plate described above has a thick plate portion, a thin plate portion having at least a recessed loading surface side, and a through hole provided in the thin plate portion.
The bottom plate has a thick plate portion, a thin plate portion whose surface side opposite to the surface facing the load plate described above is recessed, and a through hole provided in the thin plate portion.
The girder includes two pairs of holding portions that sandwich the previously described load plate and the thin plate portion of the bottom plate at the time of assembly, an insertion portion that penetrates the through hole of the previously described load plate and the bottom plate at the time of assembly, and a girder body. Have,
At the time of assembly
The above-mentioned load plate, the girder, and the bottom plate are fixed in a state where the thin plate portion of the above-mentioned load plate and the bottom plate is sandwiched by the two pairs of holding portions of the girder.
The loading surface of the thin plate portion of the previously described loading plate has a thickness gradient continuous with the thick plate portion of the previously described loading plate.
An assembly-type pallet in which the bending elastic gradient of the thick plate portion of the above-mentioned load plate / the bending elasticity gradient of the thinnest portion of the thin plate portion of the above-mentioned loading plate is less than 5.0.