JPH0633090B2 - Forklift pallet - Google Patents
Forklift palletInfo
- Publication number
- JPH0633090B2 JPH0633090B2 JP63263690A JP26369088A JPH0633090B2 JP H0633090 B2 JPH0633090 B2 JP H0633090B2 JP 63263690 A JP63263690 A JP 63263690A JP 26369088 A JP26369088 A JP 26369088A JP H0633090 B2 JPH0633090 B2 JP H0633090B2
- Authority
- JP
- Japan
- Prior art keywords
- pallet
- deck board
- girders
- thickness
- girder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Pallets (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、合成樹脂製のフォークリフト用パレットに
関する。The present invention relates to a pallet forklift pallet made of synthetic resin.
従来、この種のパレットとしては、例えば特公昭５３−
１８７７６号公報に示されたものなどが知られている。
このパレットは、第４図に示すように、２つの同形のパ
レット成形用部材１，１を相互に溶着してなるものであ
る。パレット成形用部材１は、平板状のデッキボード２
と、このデッキボード２の両側端縁部およびこの両側端
縁部間に一体に設けられた桁３……と、これら桁３……
間に設けられた補強用の多数の補強用リブ４……とから
構成されている。桁３は細長形状であって、互いに平行
に配置されている。また、補強用リブ４は、その高さが
桁３の高さよりも低くされており、これによりパレット
とした際にフォークが挿入される空間部が形成されるよ
うになっている。このようなパレット成形用部材１は、
その桁３……の底面を例えば加熱板の表面に接触させる
ことによって加熱溶融し、２つのパレット成形用部材１
の桁３……の底面を相互に圧着して溶着することによ
り、パレットとなっている。Conventionally, as this type of pallet, for example, Japanese Patent Publication No. 53-
The one disclosed in Japanese Patent No. 18776 is known.
As shown in FIG. 4, this pallet is formed by welding two pallet forming members 1 and 1 having the same shape to each other. The pallet forming member 1 is a flat deck board 2
And both side edges of the deck board 2 and the girders 3 integrally provided between the both end edges, and these girders 3 ...
It is composed of a large number of reinforcing ribs 4 ... The girders 3 have an elongated shape and are arranged parallel to each other. Further, the height of the reinforcing rib 4 is lower than that of the girder 3, so that a space portion into which the fork is inserted is formed when the reinforcing rib 4 is used as a pallet. Such a pallet molding member 1 is
The pallet forming member 1 is heated and melted by bringing the bottom surface of the girder 3 into contact with, for example, the surface of a heating plate.
The pallets are made by pressing the bottoms of the digits 3 ...
そして、前記パレット成形用部材１は、熱可塑性合成樹
脂あるいは低発泡性熱可塑性合成樹脂を用いた射出成形
法によって、成形されている。The pallet molding member 1 is molded by an injection molding method using a thermoplastic synthetic resin or a low foaming thermoplastic synthetic resin.
このようなパレットにおいては、パレット成形用部材１
を熱可塑性合成樹脂の射出成形によって製造する場合に
は、その重量が重くなるとともに、デッキボード２の桁
部３……および補強用リブ４……との連結部において成
形時ヒケが発生し、外観不良を起こしやすい問題があ
る。In such a pallet, the pallet forming member 1
When the resin is manufactured by injection molding of a thermoplastic synthetic resin, the weight thereof becomes heavy, and a sink mark is generated at the time of molding at the connecting portion between the girder portion 3 of the deck board 2 and the reinforcing ribs 4. There is a problem that the appearance is likely to occur.
また、パレット成形用部材１を低発泡性合成樹脂の射出
成形によって製造する場合には、デッキボード２、桁３
……および補強用リブ４……のすべてが発泡樹脂からな
ることから、特に偏平状のデッキボード２の機械的強度
が不足する問題がある。When the pallet molding member 1 is manufactured by injection molding of low-foaming synthetic resin, the deck board 2 and the girder 3 are used.
.. and the reinforcing ribs 4 are all made of foamed resin, so that there is a problem that the flat deck board 2 lacks in mechanical strength.
したがって、この発明は、成形時においてヒケの発生が
なく、かつデッキボードの機械的強度が高いフォークリ
フト用パレットを提供することを目的とする。Therefore, an object of the present invention is to provide a pallet for a forklift that does not cause sink marks during molding and has a high deck board mechanical strength.
この発明では、デッキボードの厚さを３〜６mmとし、桁
および補強用リブ状の補強用リブの厚さをデッキボード
の厚さよりも厚くし、デッキボード全体を無発泡状態と
し、桁および補強用リブの芯部を発泡状態とすることに
より、前記課題を解決するようにした。In this invention, the thickness of the deck board is 3 to 6 mm, the thickness of the reinforcing ribs of the girder and the reinforcing ribs is thicker than the thickness of the deck board, and the entire deck board is in a non-foamed state. The above problem is solved by making the core portion of the working rib into a foamed state.
第１図ないし第３図は、この発明のフォークリフト用パ
レットの一例を示すものである。1 to 3 show an example of a forklift pallet of the present invention.
このパレットは、２つの同形のパレット成形用部材１
１，１１から構成されている。このパレット成形用部材
１１は、デッキボード１２と３つの桁１３……と多数の
補強用リブ１４……とから構成されている。デッキボー
ド１２は、長方形状の平板であって、その厚さが３〜６
mm、好ましくは３〜５mmの範囲となっており、その全体
が無発泡状態の合成樹脂で形成されている。デッキボー
ド１２の厚さが３mm未満ではその機械的強度が不足して
好ましくない、６mmを越えると、その芯部で樹脂が発泡
状態となって同様に強度低下を来し、不都合となる。こ
のデッキボード１２の両側端縁部およびこれら両側端縁
部間の中間位置には、それぞれ桁１３……がデッキボー
ド１２と一体に形成されている。桁１３は、いずれも細
長形状の閉環壁状のものであって、互いに平行に配置さ
れ、デッキボード１２の内面からこれと一体に伸びるよ
うに成形されており、その厚さは、少なくともデッキボ
ード１２の厚さよりも厚くなっており、その表層部分は
無発泡状態とされ、芯層部分は発泡状態となっている。
また、これら桁１３……の間には、多数の補強用リブ１
４……が設けられている。これらの補強用リブ１４……
は、デッキボード１２の内面からこれと一体に伸びるよ
うに成形されてなるもので、これらのデッキボード１２
面からの高さは桁１３……よりも低くなっており、これ
によってパレットとした際に、フォークの挿入口１５，
１５が形成されるようになっている。また、これらの補
強用リブ１４……の厚さは、桁１３と同様に少なくとも
デッキボード１２の厚さよりも厚くなっており、その表
層部分は無発泡状態とされ、芯層部分は発泡状態となっ
ている。そして、この例では第２図に示すように補強用
リブ１４……は二つの桁１３，１３間において格子状に
形成されており、補強用リブ１４……で格子状に囲まれ
たデッキボード１２にはそれぞれ水抜穴１６……が形成
されている。This pallet consists of two identical pallet forming members 1
It is composed of 1 and 11. The pallet forming member 11 is composed of a deck board 12, three girders 13 ... And a large number of reinforcing ribs 14. The deck board 12 is a rectangular flat plate having a thickness of 3 to 6
mm, preferably in the range of 3 to 5 mm, and is entirely formed of non-foamed synthetic resin. If the thickness of the deck board 12 is less than 3 mm, the mechanical strength is insufficient, which is not preferable. If the thickness exceeds 6 mm, the resin foams at the core of the deck board 12 and the strength is similarly reduced, which is inconvenient. Girders 13 ... Are integrally formed with the deck board 12 at both side edge portions of the deck board 12 and at intermediate positions between the both side edge portions. Each of the girders 13 has a shape of a closed ring having an elongated shape, is arranged in parallel with each other, and is formed so as to extend integrally from the inner surface of the deck board 12, and the thickness thereof is at least the deck board. It is thicker than the thickness of No. 12, the surface layer portion is in a non-foamed state, and the core layer portion is in a foamed state.
In addition, a large number of reinforcing ribs 1 are provided between the columns 13 ...
4 ... is provided. These reinforcing ribs 14 ...
Is formed so as to extend integrally with the inner surface of the deck board 12.
The height from the surface is lower than that of the girders 13 ...
15 are formed. Further, the thickness of these reinforcing ribs 14 ... Is thicker than at least the thickness of the deck board 12 like the girder 13, and the surface layer portion thereof is in a non-foamed state and the core layer portion is in a foamed state. Has become. In this example, as shown in FIG. 2, the reinforcing ribs 14 ... Are formed in a lattice shape between the two girders 13, 13 and the deck board surrounded by the reinforcing ribs 14. Drain holes 16 ...
このようなパレット成形用部材１１を２個互いにその桁
１３……の底面が当接するように組合わせ、桁１３……
の底面を従来と同様な方法によって加熱し、熱溶着し
て、第１図に示すようなフォークリフト用パレットとさ
れる。Two such pallet forming members 11 are combined so that the bottom surfaces of the girders 13 ...
The bottom surface of the forklift truck is heated and heat-welded by a method similar to the conventional method to obtain a forklift pallet as shown in FIG.
このパレットの製造は、発泡性熱可塑性合成樹脂を用い
て個々のパレット成形用部材１１を射出成形することに
よって行われる。例えば、アゾジカルボンアミドなどの
発泡剤を０．５〜１重量％程度添加した高密度ポリエチ
レンやポリプロピレンなどの熱可塑性合成樹脂を原料と
し、射出金型を用いてデッキボード１２の外面に相当す
る位置のゲートから溶融樹脂を注入することによって成
形用部材１１を成形する。これによってデッキボード１
２の厚さが比較的薄く、この部分の溶融樹脂の流れが早
く、圧力が高いことから、デッキボード１２は無発泡状
態となる。一方、桁１３……および補強用リブ１４……
は、その厚みが比較的厚く、この部分の溶融樹脂の流れ
が遅く、圧力も低いことから、桁１３……および補強用
リブ１４……では、その表層部分では無発泡状態となる
もののその芯層部分では発泡状態となる。This pallet is manufactured by injection molding the individual pallet molding members 11 using a foamable thermoplastic synthetic resin. For example, a position corresponding to the outer surface of the deck board 12 is obtained by using a thermoplastic synthetic resin such as high-density polyethylene or polypropylene to which a foaming agent such as azodicarbonamide is added by about 0.5 to 1% by weight and using an injection mold. The molding member 11 is molded by injecting the molten resin from the gate. This makes deck board 1
Since the thickness of 2 is relatively thin, the flow of molten resin in this portion is fast, and the pressure is high, the deck board 12 is in a non-foaming state. On the other hand, the girder 13 ... and the reinforcing rib 14 ...
Is relatively thick, the flow of the molten resin in this portion is slow, and the pressure is also low. Therefore, in the girders 13 ... And the reinforcing ribs 14 ... The layer portion is in a foamed state.
ついで、このようにして成形されたパレット成形用部材
１１を上述のように２つ組合わせ、その桁１３……の底
部で熱溶着することによってパレットとなる。Then, two pallet forming members 11 thus formed are combined as described above, and heat-welded at the bottom of the girders 13 to form a pallet.
このような構成のパレットにあっては、桁１３……およ
び補強用リブ１４……が発泡樹脂から、デッキボード１
２が無発泡樹脂からなっているため、デッキボード１２
が無発泡樹脂からなるものにもかかわらず、桁１３……
および補強用リブ１４……との連結部分において成形時
にヒケがほとんど発生しない。また、デッキボード１２
が無発泡であるため、デッキボード１２の機械的強度が
高く、載荷による変形が少なくなる。In the pallet having such a structure, the deck 13 and the reinforcing ribs 14 are made of foamed resin so that the deck board 1
Deck board 12 because 2 is made of non-foamed resin
Despite being made of non-foamed resin, digit 13 ...
Almost no sink mark is formed at the time of molding at the connecting portion with the reinforcing ribs 14 ... Also, the deck board 12
Since it is non-foaming, the mechanical strength of the deck board 12 is high and the deformation due to loading is small.
発泡剤（ジアゾカルボアミド）１．０重量％、発泡助剤
（ステアリン酸亜鉛）０．５重量％を配合した高密度ポ
リエチレン（密度０．９６０g/cm2，メルトフローレイ
ト５．０g/１０分）を用い、樹脂温度１８０〜２２０℃
で射出成形を行い、第１図ないし第３図に示すような縦
９４０mm、横１５４０mm、高さ７２mmのパレット成形用
部材１１を成形した。High-density polyethylene (density 0.960 g / cm 2 , melt flow rate 5.0 g / 10 minutes) blended with 1.0% by weight of a foaming agent (diazocarbamide) and 0.5% by weight of a foaming aid (zinc stearate). ) Is used, and the resin temperature is 180 to 220 ° C.
Injection molding was carried out to form a pallet molding member 11 having a length of 940 mm, a width of 1540 mm and a height of 72 mm as shown in FIGS.
ついで、このパレット成形用部材１１，１１を２つ用
い、その桁１３……で互いに熱溶着して縦９４０mm、横
１５４０mm、高さ１４０mmの両面使用タイプのパレット
を得た。このパレットの桁および補強用リブの芯部は発
泡状態となっていた。Then, two of these pallet forming members 11 and 11 were heat-welded to each other at their columns 13 ... to obtain a double-sided pallet having a length of 940 mm, a width of 1540 mm, and a height of 140 mm. The girder of this pallet and the core of the reinforcing rib were in a foamed state.
一方、発泡剤および発泡助剤を含有しない同様の高密度
ポリエチレンを用い、同様にしてパレットを製造した。On the other hand, a pallet was manufactured in the same manner using the same high-density polyethylene containing no foaming agent and foaming auxiliary agent.
この二種のパレットについて、重量、曲げ試験（ＪＩＳ
−Ｚ−０６０２）、成形時のヒケの発生の有無について
検討した。Weight and bending test (JIS
-Z-0602), the presence or absence of sink marks during molding was examined.
結果を第１表に示す。The results are shown in Table 1.
第１表から明らかなように、本発明のパレットは軽量で
あり、かつ機械的強度も従来の無発泡樹脂製のものと比
較して孫色なく、ヒケの発生がないことがわかる。 As is clear from Table 1, the pallet of the present invention is light in weight, and has a mechanical strength which is less than that of the conventional one made of non-foamed resin and does not cause sink marks.
以上説明したように、この発明のフォークリフト用パレ
ットは、そのデッキボードを無発泡樹脂で構成し、桁お
よび補強用リブを発泡樹脂で構成したものであるので、
軽量でかつ機械的強度が高く、さらに成形時にヒケの発
生がないものとなる。As described above, in the forklift pallet of the present invention, the deck board is made of non-foamed resin, and the girders and the reinforcing ribs are made of foamed resin.
It is lightweight, has high mechanical strength, and does not cause sink marks during molding.
第１図ないし第３図はこの発明のパレットの一例を示す
もので、第１図はパレットの斜視図、第２図はパレット
成形用部材の内側正面図、第３図は第２図のIII−III線
断面図、第４図は従来のパレットを示す分解斜視図であ
る。 １１……パレット成形用部材、 １２……デッキボード、 １３……桁、 １４……補強用リブ。1 to 3 show an example of the pallet of the present invention. FIG. 1 is a perspective view of the pallet, FIG. 2 is an inner front view of a pallet forming member, and FIG. 3 is III of FIG. -III sectional drawing and FIG. 4 are exploded perspective views which show the conventional pallet. 11 ... Pallet forming member, 12 ... Deck board, 13 ... Girder, 14 ... Reinforcing rib.
Claims (1)
間のデッキボード上とに複数の桁が互いに平行にデッキ
ボードと一体に形成され、桁間には該桁よりも高さが低
い多数の補強用リブがデッキボードと一体に形成されて
なる熱可塑性樹脂製の２つのパレット成形用部材をそれ
ぞれの部材の桁底面において相互に溶着して構成された
フォークリフト用パレットにおいて、 デッキボードの厚さが３〜６mmとされ、桁および補強用
リブの厚さがデッキボードの厚さよりも大であり、熱可
塑性樹脂には低発泡性熱可塑性樹脂が用いられ、デッキ
ボードはその全体が無発泡状態であり、桁および補強用
リブの芯部が発泡状態であることを特徴とするフォーク
リフト用パレット。1. A plurality of girders are integrally formed with the deck board parallel to each other on both side edge portions of the deck board and on the deck board between the both side edge portions, and a height between the girders is higher than the girder. Low forklift pallet for forklift trucks constructed by welding two thermoplastic resin pallet forming members integrally formed with a deck board to each other at the girder bottom surface of each member The thickness of the board is 3 to 6 mm, the thickness of the girders and reinforcing ribs is larger than the thickness of the deck board, and the thermoplastic resin is a low-foaming thermoplastic resin. Is a non-foamed state, and the girder and the core portion of the reinforcing rib are in a foamed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63263690A JPH0633090B2 (en) | 1988-10-19 | 1988-10-19 | Forklift pallet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63263690A JPH0633090B2 (en) | 1988-10-19 | 1988-10-19 | Forklift pallet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02109849A JPH02109849A (en) | 1990-04-23 |
| JPH0633090B2 true JPH0633090B2 (en) | 1994-05-02 |
Family
ID=17392985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63263690A Expired - Lifetime JPH0633090B2 (en) | 1988-10-19 | 1988-10-19 | Forklift pallet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633090B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009083878A (en) * | 2007-09-28 | 2009-04-23 | Sanko Co Ltd | Plastic pallet skid |
| JP2009107120A (en) * | 2007-10-26 | 2009-05-21 | Sanko Co Ltd | Large molded product |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318776A (en) * | 1976-07-29 | 1978-02-21 | Reiwa Sangiyou Kk | Nutrition fortified food comprising garlic and chlorelal |
| JPS601011Y2 (en) * | 1981-07-14 | 1985-01-12 | 株式会社ダイフク | Transfer trolley propulsion device |
-
1988
- 1988-10-19 JP JP63263690A patent/JPH0633090B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009083878A (en) * | 2007-09-28 | 2009-04-23 | Sanko Co Ltd | Plastic pallet skid |
| JP2009107120A (en) * | 2007-10-26 | 2009-05-21 | Sanko Co Ltd | Large molded product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02109849A (en) | 1990-04-23 |
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