JPS61130031A - Manufacture of synthetic resin pallet - Google Patents
Manufacture of synthetic resin palletInfo
- Publication number
- JPS61130031A JPS61130031A JP59252200A JP25220084A JPS61130031A JP S61130031 A JPS61130031 A JP S61130031A JP 59252200 A JP59252200 A JP 59252200A JP 25220084 A JP25220084 A JP 25220084A JP S61130031 A JPS61130031 A JP S61130031A
- Authority
- JP
- Japan
- Prior art keywords
- deck board
- legs
- pallet
- sections
- projections
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D24/00—Producing articles with hollow walls
- B29D24/001—Producing articles with hollow walls formed of hollow ridges or ribs, e.g. separate ridges; continuous corrugated structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7178—Pallets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Pallets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、フォークリフトやハンドリフトなどの荷役作
業用機械で使用する合成樹脂製パレットの製造方法に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing synthetic resin pallets used in cargo handling machines such as forklifts and handlifts.
例えば、高密度ポリエチレン、ポリプロピレン等の合成
樹脂を材質とするパレットは軽量で耐久性にすぐれ、経
済的に安価であることが知られている。そして、パレッ
トは片面使用タイプと両面使用可能タイプに分かれるが
、いずれにせよ荷物を載置するデツキボードとこれを支
える脚とで構成され、脚の周囲にはフォークを差込むべ
き空間が確保されるものである。For example, pallets made of synthetic resins such as high-density polyethylene and polypropylene are known to be lightweight, durable, and economically inexpensive. Pallets are divided into types that can be used on one side and types that can be used on both sides, but either type consists of a deck board on which the cargo is placed and legs that support it, with space around the legs to insert a fork. It is something.
合成４ｉ］脂製パレツトではこのデツキボードと脚とは
一体的に成形する場合と、別々に成形して両者を結合す
る場合とがあるが、前者は一定の強度を有するものを得
ようとすると、形状がかなり複雑なものとなるのでブロ
ー成形では不可能な場合が多く、射出成形でも金形が複
雑化し、コストのかかるものとなってしまう。一方、デ
ツキボードと脚とを別々に造りこれらを絹合せる方法で
は、通常結合にボルト、ナンドが用いられるが、その頭
部が突出しないように処理することなどでを１作に手数
を要し、さらに、使用中にボルト、ナソ］・が緩み取付
けが不完全になるおそれがある。[Synthesis 4i] In the case of fat pallets, the deck board and the legs may be molded integrally, or they may be molded separately and then joined together, but in the former case, if you want to obtain something with a certain level of strength, Since the shape is quite complex, it is often impossible to use blow molding, and injection molding also results in complicated molds and high costs. On the other hand, in the method of making the deck board and the legs separately and joining them with silk, bolts and Nandos are usually used to connect them, but it takes a lot of work to make one piece because it has to be done so that the head does not protrude. Furthermore, there is a risk that the bolts and pinholes may loosen during use, resulting in incomplete installation.
また、デツキボードに接着剤等で脚を接着する方法や溶
着する方法も考えられるが、結合部の接合強度を充分確
保するのが困難であるのと、多数の脚を１個１個取付け
ていくのに時間と労力がかかる。Another option is to attach the legs to the deck board with adhesive or by welding them, but it is difficult to ensure sufficient joint strength at the joint, and it requires attaching a large number of legs one by one. It takes time and effort.
本発明の目的はかかる従来例の不都合を解消し、剛性が
高く軽量なパレットを少ない工程及び部材で製造できる
合成樹脂製パレットの製造方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a synthetic resin pallet, which eliminates the disadvantages of the conventional method and allows a highly rigid and lightweight pallet to be manufactured using fewer steps and members.
本発明は前記目的を達成するため、下面に結合用の突出
部を有する中空デツキボードと、柱体部を並列させて上
方へ突出した平板状の中空脚とをそれぞれブロー成形で
別個に形成し、しかる後に突出部と柱体部とを熱融着す
ることでデツキボードに脚を取付けることを要旨とする
ものである。In order to achieve the above object, the present invention separately forms by blow molding a hollow deck board having a protrusion for coupling on the lower surface, and a hollow leg in the form of a flat plate that juxtaposes columnar parts and protrudes upward. The gist of this method is to attach the legs to the deck board by then heat-sealing the protrusion and the column body.
本発明によれば、デツキボードも脚も中空体なので軽量
であり、該デツキボードと脚とは熱融着により他の取付
部材を用いずに簡単に結合でき、しかも脚は１個１個柱
体が独立したものではなく数個が一体化された平板状の
ものなので一挙に取付けができ、またしっかりと固定で
きる。According to the present invention, since both the deck board and the legs are hollow, they are lightweight, and the deck board and the legs can be easily connected by heat fusion without using any other mounting members, and each leg has a columnar body. It is not an independent unit, but rather a flat plate-like unit with several units integrated, so it can be installed all at once and securely fixed.
以下、図面について本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明方法で製造された合成樹脂製パレットの
斜視図、第２図は同上Ｂ矢視図、第３図は同−ＬＡ矢視
図で、図中１はデツキボード、２は脚、３はデツキボー
ド１の下面に一体的に形成された突出部、４は平板状の
脚２の上方へ突出した柱体部で、これは適宜の間隔を存
して複数個並列させる。Fig. 1 is a perspective view of a synthetic resin pallet manufactured by the method of the present invention, Fig. 2 is a view taken from the same arrow B, and Fig. 3 is a view taken from the -LA arrow shown above, where 1 is a deck board and 2 is a leg. , 3 is a protrusion integrally formed on the lower surface of the deck board 1, and 4 is a column protruding upward from the flat leg 2. A plurality of these are arranged in parallel at appropriate intervals.
まず、デツキボード１及び脚２を形成する材質から説明
すると、これはともにかつ別個にブロー成形された中空
体であり、大形ブロー成形が可能なポリオレフィン樹脂
、例えば高密度ポリエチレン、ポリプロピレンまたは、
これらの混合物が使用される。First, to explain the materials forming the deck board 1 and the legs 2, they are both hollow bodies that are blow-molded separately, and are made of polyolefin resin that can be blow-molded into large sizes, such as high-density polyethylene, polypropylene, or
Mixtures of these are used.
高密度ポリエチレンについてはＭＩがＱ、５ （ｇ／
１０ｎ＋ｉｎ ：ｌ以下のホモポリマーまたは、ブテ
ン−１やヘキセン−１などのαオレフィンとの共重合体
が使用される。For high density polyethylene, MI is Q, 5 (g/
A homopolymer of 10 n+in:l or less or a copolymer with an α-olefin such as butene-1 or hexene-1 is used.
ポリプロピレンについては、ＭＦＲＩ Ｃｇ／１０ｍ
１ｎ ）以下のエチレン・プロピレンブロック共重合体
の使用が耐寒強度の面でのぞましい。または、ポリプロ
ピレン（ホモポリマーを含む）に各種のエラストマー（
例えばＥＰＭ、ＥＰＤＭ、 ＥＶＡ。For polypropylene, MFRI Cg/10m
1n) It is desirable to use the following ethylene/propylene block copolymers in terms of cold resistance strength. Alternatively, polypropylene (including homopolymers) and various elastomers (
For example, EPM, EPDM, EVA.
ＥＥＡなど）や低密度ポリエチレンを配合したものも使
用される。また、必要に応じて各種フィラー（例えばマ
イカ、タルク、ガラス繊維、シラスバルーン炭カルなど
の無機フィラーや木粉、古紙など）を混合してもよい。EEA, etc.) and low-density polyethylene are also used. Further, various fillers (for example, mica, talc, glass fiber, inorganic fillers such as Shirasu balloon charcoal, wood powder, waste paper, etc.) may be mixed as necessary.
なお、後述のようにデツキボード１と脚２の材質は熱融
着する関係上、同一材質であることが好ましいが、接合
を良好に行いうれば異材質とすることも可能である。As will be described later, it is preferable that the deck board 1 and the legs 2 are made of the same material because they are heat-sealed, but they may be made of different materials if they can be bonded well.
デツキボード１は上面が何の凹凸を持たない平板であり
、下面には一例として第１０図に示すように、上面を接
合面３ａとした円錐台状の突出部３が４隅とその中心と
その中間というように適宜間隔で一体的に形成される。The deck board 1 is a flat plate with no unevenness on the upper surface, and on the lower surface, as shown in FIG. They are integrally formed at appropriate intervals such as in the middle.
また、同じくデツキボード１の下面には第１２図に示す
ように、成形の際に裏面側より陥没させて形成した２面
１組の壁Ｃからなり、その底部ｄはデツキボード１の上
面側の壁と融着させた凹溝からなる、長平に連続したリ
ブ５，６．７が格子状に設置され、これに対し、その間
で同様の構造のリブ８，９がデ・ツキボード１の中心か
ら放射状に配設される。“他の実施例としては、第１１
図に示すように前記放射状のリブ８，９の代りに縦方向
のリブ１０を加えたものとしてもよい。Similarly, as shown in FIG. 12, the bottom surface of the deck board 1 is made up of a set of two walls C that are depressed from the back side during molding, and the bottom d is the wall C on the top side of the deck board 1. Continuous long ribs 5, 6.7 consisting of concave grooves fused to a lattice are installed in a lattice pattern, while ribs 8, 9 of a similar structure are arranged radially from the center of the de-tsuki board 1 between them. will be placed in “Another example is the 11th
As shown in the figure, vertical ribs 10 may be added instead of the radial ribs 8 and 9.
これらリブ５〜１０は接合面３ａを形成するための突出
部３を貫通するか、またはその一部に懸かるようにし、
これによってリブの連続性が保たれ、また他の交叉する
リブと強度上の連結がはかられるようにしている。These ribs 5 to 10 are arranged to pass through the protrusion 3 for forming the joint surface 3a, or to hang over a part of the protrusion 3,
This maintains the continuity of the ribs and also ensures strong connections with other intersecting ribs.
このように多くのリブがパレット内部に連続性を保って
設置され、かつ、リブの端末が接合面３ａで連結される
ので、パレットの静置負荷およびリフトによる運ｔＵ時
の負荷をいわゆる連続はりとして受けることになる。In this way, many ribs are installed inside the pallet while maintaining continuity, and the ends of the ribs are connected at the joint surface 3a, so that the stationary load of the pallet and the load when it is being lifted are handled by a so-called continuous beam. It will be received as
このことは、パレットの使用状態下で局所的に発生する
支点反力（例えばフォークの当り面周辺や静置下での脚
部とデツキボードの接合部周辺に生ずる。）を、これら
の連続リブによりスムーズにデツキボード全体に伝達し
、応力を各所に分散、平均化するのに役立ち、その結果
デツキボードに局所的変形を起こすことなく、従って全
体的に変形を小さく抑えることができる。This means that the fulcrum reaction force that occurs locally when the pallet is in use (for example, around the contact surface of the fork or around the joint between the legs and the deck board when the pallet is left still) can be absorbed by these continuous ribs. It helps in smoothly transmitting the stress to the entire deck board, dispersing and averaging the stress to various parts, and as a result, the deck board does not undergo local deformation, and therefore deformation can be kept to a small level overall.
一方、脚２は第４図〜第９図に示すように、長手方向に
伸びる平板状の桁２ａからなり、該桁２ａから上方に向
けて柱体部４が一体に形成されその上面が接合面４ａと
なる。On the other hand, as shown in FIGS. 4 to 9, the leg 2 consists of a flat plate-shaped girder 2a extending in the longitudinal direction, and a column body 4 is integrally formed upward from the girder 2a, and its upper surface is joined. This becomes surface 4a.
この柱体部４は、積荷による負荷を圧縮荷重として受持
つ部分でありこの場合、圧縮荷重ｅ（第５図中の矢印）
は側壁４ｂを介して、桁２ａまたは接地面に伝わる。特
にパレットが地面に静置された場合、この壁面の耐圧縮
座屈強度が搭載可能荷重を支配する。座屈強度を向上さ
せるのに肉厚増加は有効ではあるが、重量増加を招き、
余り好ましくない。This column body 4 is a part that takes on the load due to cargo as a compressive load, and in this case, the compressive load e (arrow in Fig. 5)
is transmitted to the girder 2a or the ground plane via the side wall 4b. In particular, when the pallet is placed on the ground, the compressive buckling strength of the wall surface controls the load that can be mounted. Increasing wall thickness is effective in improving buckling strength, but it leads to increased weight.
I don't like it very much.
また、側壁４ｂは荷重ｅの方向に平行、即ち直立してい
ることが耐座屈面でのぞまれるが、反面、成形時の離型
不良及びコーナ一部分の薄肉化を防止するためのテーパ
ーθ（但し５°以内）が必要である。しかし、この角度
θは荷重ｅ負荷に際し、曲げモメントを壁面に発生させ
、座屈限界荷重を大いに低下させるので、このような制
約を解消するため、柱体部４の内部にエムボスリブ１１
を設置して２重壁構造とし、座屈強度を向」ニさせた。In addition, it is desirable for the side wall 4b to be parallel to the direction of the load e, that is, to stand upright, from the viewpoint of buckling resistance, but on the other hand, it is necessary to taper θ ( However, within 5°) is required. However, this angle θ generates a bending moment on the wall surface when the load e is applied, and greatly reduces the buckling limit load. Therefore, in order to eliminate such restrictions, an embossing rib 11 is installed inside the column body 4.
A double wall structure was installed to improve buckling strength.
また、桁２ａの接地面側に、長手方向に連続したリブ１
２を設け、さらに必要に応じてこの連続リブ１２を設置
したのち、残ったスペースに補助リブ１３を併設するこ
ともある。In addition, a rib 1 continuous in the longitudinal direction is provided on the ground surface side of the girder 2a.
2, and if necessary, after installing this continuous rib 12, an auxiliary rib 13 may be added in the remaining space.
一方、桁２ａにはフォークの進入を容易にし、フォーク
の出入りに伴う桁２ａの損傷を軽減するため、面取り１
４を形成する。On the other hand, the girder 2a is chamfered in order to facilitate the entry of the fork and reduce damage to the girder 2a caused by the fork coming in and going out.
form 4.
次に製造方法を説明すると、このようなデ・ツキボード
１と脚２とをブロー成形機で個別に成形し、デツキボー
ドｌの突出部３と脚２の柱体部４のそれぞれの接合面３
ａ、４ａを熱板溶接または振動摩擦溶接、電磁誘導加熱
等により熱融着させてデツキボード１に１ｌＯ１２を度
付ける。ここで個別とは別体として製造されるという意
味であり、同一の金型を使用し、異なるキャビティーで
成形する場合と、全く異なる金型を用いる場合の両方を
含む。Next, to explain the manufacturing method, such a de-tuki board 1 and the leg 2 are individually molded using a blow molding machine, and the respective joint surfaces 3 of the protruding part 3 of the de-tuki board 1 and the column body part 4 of the leg 2 are formed.
a, 4a are thermally fused by hot plate welding, vibration friction welding, electromagnetic induction heating, etc., and 1 lO12 is applied to the deck board 1. Here, "individual" means to be manufactured separately, and includes both cases where the same mold is used and molded in different cavities, and cases where completely different molds are used.
柱体部４の“高さ“は、開口部ｂ（第１図）を形成する
ために一定のものが必要であるが、プロー比が桁２ａの
部分と異なるため、特にコーナ一部４Ｃなどで薄肉化し
やすい。このため、デツキボード１側にも突出部３を設
けてパレットの高さ及び開口部を確保しつつ、柱体部４
の高さを抑えるようにした。The "height" of the column body 4 needs to be constant in order to form the opening b (Fig. 1), but since the blow ratio is different from that of the girder 2a, it is necessary to have a certain height, especially at the corner part 4C. It is easy to make the wall thinner. For this reason, a protrusion 3 is also provided on the deck board 1 side to ensure the height and opening of the pallet, while the column body 4
I tried to keep the height down.
このように、突出部３は、溶接部分を限定、確保すると
同時に、柱体部４の高さが、不当に高くならないように
調整する役目を有する。In this way, the protrusion 3 has the role of limiting and securing the welding area and at the same time adjusting the height of the column body 4 so that it does not become unduly high.
このようにして、製作されたパレットは、第１図申開口
部ａ及びｂが確保され矢印Ａ方向及びＢ方向のいずれの
方向からもフォークリフト（ハンドリフターも含む）を
進入、荷扱することが可能である（いわゆる四方差しタ
イプ）。In this way, the manufactured pallet has openings a and b secured in the first drawing, allowing a forklift (including a hand lifter) to enter and handle the cargo from either direction of arrows A and B. (so-called four-way insertion type).
また、他の実施例として脚２を格子状に組み、田の字に
取付けることもできる。Further, as another embodiment, the legs 2 can be assembled in a grid pattern and attached in a cross-section.
そして、デツキボード１の上面は平面なのでゴミ等がた
まりにくく洗浄が容易であり、衛生的なものとなる。Since the upper surface of the deck board 1 is flat, it is difficult for dust to accumulate and is easy to clean, making it sanitary.
また、柱体部４の側壁４ｂが曲面で構成されているので
、フォークの当りを曲面」二で横Ｇこそらセ。In addition, since the side wall 4b of the column body 4 is made of a curved surface, the fork's contact with the curved surface is less than the lateral force.
損傷を防ぐことができる。Damage can be prevented.
デツキボード１の裏面が第１０図の場合Ｇこ番よ、もし
入方向からフォークが進入すれば、リブ５゜７．８．９
がブリッジの役目をなし、リフト運１駁時のたわみを抑
える。また、Ｂ方向からフォークが進入すれば、リブ６
．８．９が同様な役目を果たす。If the back side of the deck board 1 is as shown in Figure 10, then if the fork enters from the entry direction, the rib 5°7.8.9
acts as a bridge and suppresses deflection during lift luck 1. Also, if the fork enters from direction B, rib 6
．． 8.9 plays a similar role.
デツキボード１の裏面が第１１図の場合には、縦方向に
重点的にリブが配置されていて、これＧこ対し脚２が図
上では横方向に設置されるので、これが補強材として働
くため、横方向へのリブの設置本数を減じても支障はな
い。When the back side of the deck board 1 is shown in Fig. 11, ribs are arranged mainly in the vertical direction, and the legs 2 are placed in the horizontal direction in the figure, so that these act as reinforcement materials. , there is no problem even if the number of ribs installed in the horizontal direction is reduced.
また、脚２の桁２ａに設けたＪブ１２番よ、ノぐレット
の曲げ（第５図のｌ印のモメント）に対する剛性向上に
寄与し、パレ・ノ１−が両側で支持さ狛７たときゃ、フ
ォークリフトで持ち上げられたときの変形防止に有効で
ある。特にリブ１３を設けた場合は主にフォークリフト
の受圧面を強化するのに役立つ。In addition, the J-button No. 12 provided on the girder 2a of the leg 2 contributes to improving the rigidity against bending of the noglet (the moment marked with l in Fig. 5), and the pallet no. 1- is supported on both sides of the noglet. This is effective in preventing deformation when lifted by a forklift. In particular, when the rib 13 is provided, it mainly serves to strengthen the pressure receiving surface of the forklift.
実例及び試験結果について述べると、石川島播磨重工業
製ブロー成形機Ｔ Ｐ Ｂ −２００に当該デザインに
基づく金型を取付、成形した。成形材料は、フィリップ
ス法による高密度ポリエチレン〔ホモポリマー、密度０
．９５２以上、Ｍｌ（高荷重法２１．６ｋｇ）で５〕を
使用し、２００°Ｃの成形温度にてデツキボードと脚（
３個）を成形後、両者を融着した。デツキボードサイズ
は、１１００ｘ ９００ｍｍ 、高さ１５０１でデツキ
ボード重量１０ｋｇ、脚重量１．５ｋｇ／個とした。Regarding actual examples and test results, a mold based on the design was attached to a blow molding machine TPB-200 manufactured by Ishikawajima-Harima Heavy Industries, Ltd., and molded. The molding material was high-density polyethylene [homopolymer, density 0] made by the Phillips method.
．． 952 or higher, Ml (high load method 21.6 kg) 5] was used, and the deck board and legs (
After molding 3 pieces), both were fused. The deck board size was 1100 x 900 mm, height 1501 mm, deck board weight 10 kg, and leg weight 1.5 kg/piece.
このパレットにつき、ＪＩＳ Ｚ０６０２に基づく曲げ
強度試験を行ったところ、１トン負荷で１５ｍｍ、１．
５トン負荷で２５ｍｍの変形であり、積載荷重１トン用
パレツトのＢ種にランク付けられた。When this pallet was subjected to a bending strength test based on JIS Z0602, the strength was 15 mm and 1.
The deformation was 25 mm under a load of 5 tons, and it was ranked as a Class B pallet for a 1-ton load.
同じ＜ ＪＩＳ Ｚ ０６０２に基づく圧縮試験を行っ
たところ、４／３トン負荷／（１脚当り）で３ｍｍあり
、積載荷重１トン用パレツトのＡ、Ｂ種基準（４ｍｍ以
内）をパスした。When a compression test was conducted based on JIS Z 0602, the result was 3 mm at a 4/3 ton load/(per leg), which passed the A and B standards (within 4 mm) for pallets with a carrying capacity of 1 ton.
同じ＜ 、ｙ’ｒｓ ｚ ０６０２に基づく落下試験（
１ｍ高さよりコーナ一部落下）を実施したが、パレｙ
）の対角線長さの寸法変化率は０％で、Ａ、Ｂ種基準±
１．５％以下）をパスした。Same < , drop test based on y'rs z 0602 (
(Part of the corner fell from a height of 1m), but the parley
) The dimensional change rate of the diagonal length is 0%, and the standard for A and B types ±
1.5% or less).
また、１トンの樹脂（２５ｋｇ紙袋、４０袋）をのせ、
フォークリフターで運搬テストを行ったが、フォーク昇
降時の変形は、パレットの末端で５ｍｍ以内であり、実
用上支障は認められなかった。In addition, 1 ton of resin (25 kg paper bags, 40 bags) was placed on the
A transportation test was conducted using a forklift, and the deformation during lifting and lowering of the fork was within 5 mm at the end of the pallet, and no practical problems were observed.
以上述べたように本発明の合成樹脂製パレットの製造方
法は、デツキボードと脚の接合は熱融着によりボルト等
地の部材を用いることなく簡単に接合でき、しかも、比
較的広い接合面が確保できるので、接合部の応力集中を
さけることができるものである。As described above, in the method for manufacturing a synthetic resin pallet of the present invention, the deck board and the legs can be easily joined by heat fusion without using base materials such as bolts, and a relatively wide joint surface is ensured. Therefore, stress concentration at the joint can be avoided.
さらに、デツキボードと脚は一体成形でなく、別個の成
形物として分離されたものであるので、ブロー比の不均
一に基づく肉厚分布の不均一を解消し、デツキボードの
裏面及び脚に連続したりブを任意の配置で設置でき、脚
とデツキボードの肉厚を要求性能に応じて任意に選べる
という強度上有利な対策を講じることができる。Furthermore, since the deck board and the legs are not integrally molded, but are separated as separate molded products, uneven wall thickness distribution due to uneven blow ratios can be eliminated, and the thickness can be continuous with the back surface of the deck board and the legs. Advantageous measures can be taken in terms of strength, such as allowing the legs and deck board to be installed in any desired arrangement, and the wall thickness of the legs and deck board to be arbitrarily selected according to the required performance.
第１図は本発明方法により製造された合成樹脂製パレッ
トの斜視図、第２図は同上第１図のＢ矢１視図、第３図
は第１図のＡ矢視図、第４図は脚の斜視図、第５図は同
一ヒ正面図、第６図は同上平面図、第７図は同上底面図
、第８図は第７図のＸ−Ｘ線断面図、第９図は第７図の
Ｙ−Ｙ線断面図、第１０図はデツキボードの底面図、第
１１図は他の実施例でのデツキボードの底面図、第１２
図はリブを示す要部の断面図である。
１・・・デツキボード ２・・・脚
２ａ・・・桁 ３・・・突出部３ａ・・・接
合面 ４・・・柱体部４ａ・・・接合面
４ｂ・・・側壁４Ｃ・・・コーナ一部
５．６，７，８，９．１０，１２．１３・・・リブ１１
・・・エムボスリブ １４・・・面取りに′−−−
Ｊ）
Ｋ−−ノ ぐ第１０図
第１１図
第１２図Fig. 1 is a perspective view of a synthetic resin pallet manufactured by the method of the present invention, Fig. 2 is a view taken from arrow B in Fig. 1, Fig. 3 is a view taken from arrow A in Fig. 1, and Fig. 4. is a perspective view of the leg, FIG. 5 is a front view of the same leg, FIG. 6 is a top view of the same, FIG. 7 is a bottom view of the same, FIG. FIG. 7 is a sectional view taken along the line Y-Y, FIG. 10 is a bottom view of the deck board, FIG. 11 is a bottom view of the deck board in another embodiment, and FIG. 12 is a bottom view of the deck board in another embodiment.
The figure is a sectional view of the main part showing the rib. 1...Deck board 2...Leg 2a...Girder 3...Protrusion part 3a...Joint surface 4...Column body part 4a...Joint surface
4b... Side wall 4C... Corner part 5.6, 7, 8, 9.10, 12.13... Rib 11
... Emboss rib 14 ... Chamfer' --- J) K --- Fig. 10 Fig. 11 Fig. 12
Claims (1)
体部を並列させて上方へ突出した平板状の中空脚とをそ
れぞれブロー成形で別個に形成し、しかる後に突出部と
柱体部とを熱融着することでデッキボードに脚を取付け
ることを特徴とした合成樹脂製パレットの製造方法。A hollow deck board having a protrusion for connection on the lower surface and a hollow leg in the shape of a flat plate that juxtaposes the column body and protrudes upward are separately formed by blow molding, and then the protrusion and the column body are formed separately. A method for manufacturing a synthetic resin pallet characterized by attaching legs to a deck board by heat-sealing the legs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252200A JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252200A JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130031A true JPS61130031A (en) | 1986-06-17 |
| JPH0415732B2 JPH0415732B2 (en) | 1992-03-18 |
Family
ID=17233890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59252200A Granted JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130031A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014667A1 (en) * | 1992-12-18 | 1994-07-07 | Shuert Lyle H | Panel structure and pallet utilizing same |
| EP0824462A1 (en) * | 1995-04-24 | 1998-02-25 | Lyle H. Shuert | Pallet with plastic legs |
| EP1155965A1 (en) * | 2000-05-15 | 2001-11-21 | FUSTIPLAST S.p.A. | Pallet with a plastic platform |
| US6524426B1 (en) * | 1999-06-15 | 2003-02-25 | Edison Welding Institute | Plastic lumber pallets |
| JP2005538909A (en) * | 2002-09-18 | 2005-12-22 | インテル イーカーエーアー システムズ ベスローテン フェンノートシャップ | Mounting ledge |
| JP2009190790A (en) * | 2008-02-15 | 2009-08-27 | Protechna Sa | Container for transporting and storing liquid |
| CN103508031A (en) * | 2012-06-22 | 2014-01-15 | 日本通运株式会社 | Pallet device used for cargo transport |
| JP2014005021A (en) * | 2012-06-22 | 2014-01-16 | Kyoraku Co Ltd | Pallet |
| JP2014046954A (en) * | 2012-08-31 | 2014-03-17 | Kyoraku Co Ltd | Palette and palette manufacturing method |
| JP2014169099A (en) * | 2013-03-04 | 2014-09-18 | Sanko Co Ltd | Box pallet |
| CN110979904A (en) * | 2019-11-07 | 2020-04-10 | 湖南工业大学 | Convenient dismantlement formula tray |
-
1984
- 1984-11-28 JP JP59252200A patent/JPS61130031A/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014667A1 (en) * | 1992-12-18 | 1994-07-07 | Shuert Lyle H | Panel structure and pallet utilizing same |
| EP0824462A1 (en) * | 1995-04-24 | 1998-02-25 | Lyle H. Shuert | Pallet with plastic legs |
| EP0824462A4 (en) * | 1995-04-24 | 2000-05-03 | Lyle H Shuert | Pallet with plastic legs |
| US6524426B1 (en) * | 1999-06-15 | 2003-02-25 | Edison Welding Institute | Plastic lumber pallets |
| EP1155965A1 (en) * | 2000-05-15 | 2001-11-21 | FUSTIPLAST S.p.A. | Pallet with a plastic platform |
| JP2005538909A (en) * | 2002-09-18 | 2005-12-22 | インテル イーカーエーアー システムズ ベスローテン フェンノートシャップ | Mounting ledge |
| JP2009190790A (en) * | 2008-02-15 | 2009-08-27 | Protechna Sa | Container for transporting and storing liquid |
| CN103508031A (en) * | 2012-06-22 | 2014-01-15 | 日本通运株式会社 | Pallet device used for cargo transport |
| JP2014005021A (en) * | 2012-06-22 | 2014-01-16 | Kyoraku Co Ltd | Pallet |
| JP2014046954A (en) * | 2012-08-31 | 2014-03-17 | Kyoraku Co Ltd | Palette and palette manufacturing method |
| JP2014169099A (en) * | 2013-03-04 | 2014-09-18 | Sanko Co Ltd | Box pallet |
| CN110979904A (en) * | 2019-11-07 | 2020-04-10 | 湖南工业大学 | Convenient dismantlement formula tray |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0415732B2 (en) | 1992-03-18 |
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